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EP4090219A1 - Distal head for an endoscope, said distal head being provided with an enlarged working channel - Google Patents

Distal head for an endoscope, said distal head being provided with an enlarged working channel

Info

Publication number
EP4090219A1
EP4090219A1 EP20853534.4A EP20853534A EP4090219A1 EP 4090219 A1 EP4090219 A1 EP 4090219A1 EP 20853534 A EP20853534 A EP 20853534A EP 4090219 A1 EP4090219 A1 EP 4090219A1
Authority
EP
European Patent Office
Prior art keywords
distal
support
face
hole
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20853534.4A
Other languages
German (de)
French (fr)
Inventor
Emmanuel Hallauer
Philippe Le Roux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AXESS VISION Tech
Original Assignee
AXESS VISION Tech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AXESS VISION Tech filed Critical AXESS VISION Tech
Publication of EP4090219A1 publication Critical patent/EP4090219A1/en
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/015—Control of fluid supply or evacuation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00094—Suction openings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/018—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00096—Optical elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00101—Insertion part of the endoscope body characterised by distal tip features the distal tip features being detachable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005—Flexible endoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661—Endoscope light sources
    • A61B1/0676—Endoscope light sources at distal tip of an endoscope

Definitions

  • Distal endoscope head provided with an enlarged working channel
  • the present invention relates to the technical field of medical endoscopes in the general sense allowing access to the interior of a body such as a cavity or a channel for example and it relates to endoscopes of a reusable or single-use nature.
  • the present invention relates more specifically to the distal head of such endoscopes, suitable for performing multiple functions such as viewing, supplying fluid, suctioning fluid, supplying instruments, taking samples. or surgical operations for example.
  • the endoscope equipped with the distal head according to the invention finds particularly advantageous applications for allowing access to the internal surface of a hollow organ, of a cavity or of a natural or artificial duct of the body human to perform various operations for therapeutic, surgical or diagnostic purposes.
  • the endoscope according to the invention is used for diagnostic, therapeutic or surgical purposes for the inspection of all internal parts of the human body accessible by natural or artificial means.
  • the endoscope according to the invention can be used in the field of the urinary tract, the gastrointestinal tract, the respiratory system, the cardiovascular system, the trachea, the sinus cavity, the reproductive system of the woman, the abdominal cavity or any other part of the human body to be explored by a natural or artificial route.
  • a medical endoscope comprises, as described for example by patent application WO 2014/106510, a control handle to which is fixed a tubular structure comprising a distal head equipped with a vision system to illuminate and examine the organ, cavity or the duct of the human body. Upstream of the distal head, the tubular insertion structure includes a baffle portion making it possible to orient the distal head inside the insertion path.
  • This tubular structure is adapted to allow to bring at the level of the distal head, one or more devices designed to perform different functions such as for example the supply of fluid, the suction of fluid, the supply of instruments, taking samples or performing surgery.
  • the distal head of the endoscope is also equipped with at least one so-called operator or working channel to allow the passage of these various devices.
  • an endoscope is provided with a multifunctional distal head configured to allow the implantation of the vision system and the passage of these various devices.
  • this distal head has a passage or bulk section which is limited by the smaller width of the natural or artificial access path in which the tubular structure is engaged.
  • a difficulty arises in configuring the distal head so that certain functions of the endoscope can be carried out. This is the case in particular with the function of aspiration of liquids, the removal of bulky bodies or the use of bulky tools such as a biopsy forceps. Sucking phenomena also appear on the mucous membranes which may lead to hemorrhages.
  • the distal head of such an endoscope is relatively complex to produce, increasing its manufacturing cost.
  • Patent application US 2017/0143199 describes a bronchoscope comprising a rigid tube delimiting a working channel separated from a material channel by an internal wall. An illumination component and an imaging component are attached to the distal end of the hardware channel.
  • the rigid tube is bevelled at the distal end to increase the size of the working channel opening and reduce the overall dimension of the distal end of the tube. If the distal end of such a tube is reduced, its bevelled shape does not offer complete security to access inside bodies with access routes with particular shapes. Such a shape is also less effective in ensuring good suction of liquids, without loss of pressure.
  • Patent application EP 1 772 095 describes an endoscope provided with an instrument adapted to pivot at its distal end.
  • the instrument is inserted into the operating channel, opening through an elliptical opening, into a housing provided in the distal head and in which a pivotally actuated support is housed.
  • This endoscope has a distal head with a large bulk and is not suitable for, in particular, the suction of fluid.
  • US patent application 2013/0150667 describes an endoscope in particular having an operating channel comprising a conductive tubular insert mounted on one side in a housing provided in the distal head and on the other side in a tube. There is no change in section of said operating channel making it possible to increase the suction, at the inlet on the distal side.
  • This endoscope has a distal head with a large footprint.
  • the present invention therefore aims to remedy the drawbacks of the state of the art by proposing a new distal head for an endoscope, of simple and inexpensive design, adapted to allow the complete and efficient implementation of the various functions of the endoscope.
  • the present invention also aims to provide a new distal head for an endoscope offering limited space while making it possible to optimize the suction of fluids and to limit the suction phenomena.
  • the distal endoscope head comprises a support for a vision system, the support being delimited on one side, by a proximal face and on the opposite side, by a distal face parallel to the proximal face and into which the vision system opens, the support being crossed by at least one hole of an operating channel opening into the distal face by an ovoid section, the surface of which is projected relative to the axis of the hole decreases from the distal face of the carrier towards the proximal face of the carrier, the ovoid section of the working channel in the distal face occupying an area greater than or equal to at least 50% of the area of the distal face of the carrier.
  • the ovoid section of the hole of the operating channel in the distal face of the support occupies an area of between 50% and 60% of the surface of the distal face of the support.
  • the ovoid section of the hole of the operating channel evolves from the distal face of the support, to end in a circular section.
  • the ovoid section of the hole of the operating channel evolves from the distal face of the support, to end in a circular section, at a stop surface for one end of the duct delimiting the operating channel.
  • the ovoid section of the hole of the operating channel is delimited at the level of the distal face, by a peripheral edge in an arc of a circle concentric with the outer surface of the support and connected on both sides , by connecting edges to a central edge in an arc of a circle, the radius of which is greater than the radius of the peripheral edge.
  • the support is in the form of a ring delimited on one side by the distal face and on the other side by the proximal face, the distal and proximal faces being parallel to each other and perpendicular to the longitudinal axis of the ring.
  • the hole of the operating channel is delimited by an internal surface provided, starting from the distal face of the support, with grooves or ribs in the form of a helix.
  • the support comprises a passage for mounting, as a video system, an optical lens or a vision sensor and at least one light source, coated on the distal face of the support, d 'transparent protective material.
  • the optical lens or the vision sensor and at least the light source are embedded in the mounting passage, by the transparent protective material.
  • the support comprises from the proximal face, a cylindrical section extended by a narrowed section decreasing to the distal face of the support to present at the level of the distal face, a pseudotriangular section.
  • the passage opens into the part of the distal face, located opposite the semicircular edge, between the central edge of the support and the central edge delimiting the hole.
  • Another object of the invention is to provide an insertion tube connected at its proximal part, to a control handle and equipped at its distal part, with a distal head according to the invention.
  • Figure 1 is a general view of an endoscope in the general sense equipped with a distal head according to the invention.
  • FIG. 2 is a view showing more particularly the crutching part of the distal head according to the invention.
  • Figure 3 is a perspective of the distal head according to the invention seen from its distal face.
  • Figure 4 is a perspective of the distal head viewed from its proximal face.
  • Figure 5 is a plan view of the distal head taken from its distal face.
  • Figure 6 is a plan view of the distal head taken from its proximal face.
  • FIG. 7 is a view analogous to FIG. 4 showing the distal head equipped with the operating conduit.
  • FIG. 8 is a view analogous to FIG. 3, showing the distal head equipped with the working conduit.
  • Figure 9 is a front view of another embodiment of the distal head according to the invention.
  • FIG. 1 illustrates by way of example, a medical endoscope 1 in the general sense designed to access the interior of a body such as a cavity or a channel for example.
  • an endoscope 1 comprises an insertion tube 2 having on one side, a proximal part 2i connected to a control handle 3 and on the opposite side, a distal part 2 2 , which is equipped with a distal head. 4 according to the invention.
  • the insertion tube 2 is fixed temporarily or permanently on the control handle 3.
  • This insertion tube 2 which has a length and a greater or lesser flexibility is intended to be introduced into a natural access route or artificial in order to perform various operations or functions for therapeutic, surgical or diagnostic purposes.
  • the insertion tube 2 is made of a semi-rigid material and has a length adapted to the length of the duct to be inspected and which may be between 5 cm and 2 m.
  • the insertion tube 2 has various cross-sectional shapes such as square, oval or circular.
  • This insertion tube 2 which is in contact with tissues, human organs or medical devices (trocars or probes), essentially involves single or multiple use by a patient or even reusable use after decontamination, disinfection. or sterilization.
  • the endoscope 1 comprises a vision system V capable of illuminating and bringing back an image of the distal part of the insertion tube 2.
  • the endoscope 1 thus comprises a system of mounted vision inside the control handle 3 and penetrating inside the insertion tube 2 up to the distal head 4.
  • the endoscope 1 also comprises a control mechanism 5 for orienting the distal head 4 relative to the longitudinal axis X of the insertion tube 2.
  • the insertion tube 2 comprises upstream of the distal head 4, a flexion, folding or bending part 6 allowing the orientation of the distal head 4 with respect to the longitudinal axis X of the insertion tube 2 (FIG. 2).
  • the control mechanism 5 can be produced in any suitable manner so that the distal head 4 can be moved between a rest position in which the insertion tube 2 is rectilinear and a crutched position in which the crutching part 6 is curved.
  • the control mechanism 5 may correspond to the control mechanism described in patent FR 3 047 887.
  • the control mechanism 5 comprises a manual control lever rotating a pulley on which is fixed at least one cable mounted inside the insertion tube 2 to be fixed to the distal head 4.
  • the endoscope 1 also comprises an operating or working channel 9 extending from the control handle 3 to the distal head 4 to allow the supply of various tools and / or fluids and / or suction of fluids.
  • This operating channel 9 is delimited by a pipe or conduit 10 positioned inside the insertion tube 2 (Fig. 7, 8).
  • the distal head 4 comprises a body or a support 11 in the form of a ring delimited on the side closest to the control handle 3, by a proximal face llp and on the side furthest from the control handle, by a distal face lld into which opens the vision system V.
  • this ring or support 11 is delimited on one side by the distal face lld and the 'other side by the proximal face llp.
  • the distal face lld and the proximal face llp are mutually parallel and perpendicular to the longitudinal axis of the ring or of the support.
  • the support 11 comprises, from the proximal face 11p, an outer surface delimiting a circular cylindrical section 11c extended by a narrowed section 11c decreasing to the distal face 11d of the support 11.
  • the distal face lld of the support 11 has a section or a pseudo-triangular profile delimited by a semicircular edge lli extending on either side, by connecting edges 11 2 , to the edges rectilinear 11 3 converging being connected by connecting edges 11 4 , to a central edge 11 5 in the form of an arc of a circle, with a radius smaller than the radius of the semi-circular edge III.
  • the narrowed section of the support thus has a profile which evolves from a pseudo-triangular profile to a circular profile coming to be connected by a cylindrical connection section llr, to the circular cylindrical section 11c of the support 11.
  • the circular cylindrical section 11c has a diameter smaller than the diameter of the cylindrical connecting section llr to define a shoulder 11b. This circular cylindrical section 11c is adapted to receive a protective sheath 6i for the lever part 6.
  • the support 11 of the distal head 4 is crossed right through, by the operating channel 9 to open into the distal face lld.
  • a hole 12 is made in the support 11 from the distal face 11d to form the end part of the working channel 9. This hole 12 extends. up to a stop surface 13 arranged in the support 11 to serve as a stop at the end of the duct 10 which thus communicates with this hole 12.
  • each fixing arm 14 comprises a stud 14i intended to cooperate with an oblong opening made in the crutch part 6 to constitute a bayonet assembly between the distal head 4 and the crutch part 6.
  • the operating channel 9 has at the level of the distal head 4, a section which decreases in the direction of the proximal face llp of the support 11.
  • the hole 12 of the support 11 has a section which decreases in the direction of the proximal face llp of the support 11. The section of the hole 12 is thus the smallest at the level of the stop surface 13 and widens in the direction of the distal face lld of support 11.
  • the operating channel 9 has a section which decreases from the distal face lld of the support 11.
  • the hole 12 has a section which decreases from the distal face lld of the support and up to the stop surface 13.
  • the section of the hole 12 is thus the smallest at the level of the stop surface 13 and widens to the distal face 11d of the support 11.
  • the section of the hole 12 gradually decreases between the distal face 11d of the support 11 and the abutment surface 13.
  • the operating channel 9 opens into the distal face lld of the support 11 via an ovoid section.
  • the hole 12 is delimited at the level of the distal face lld, by a peripheral edge 12i in an arc of a circle connected on either side, by connecting edges 12 2 , to a central edge. 12 3 in a circular arc, the radius of which is greater than the radius of the peripheral edge 12i.
  • the peripheral edge 12i is concentric with the support 11 and more precisely with the external surface of the support 11 (narrowed section lie) in order to maximize the suction zone, and has a radius of curvature Ri.
  • the central edge 12 3 has a radius of curvature, R 2, such that R I ⁇ R 2 ⁇ 4XR I.
  • the operating channel 9 thus opens into the distal face 11d by an ovoid section whose projected area relative to the axis of the hole 12 decreases from the distal face 11d of the support towards the proximal face 11p of the support 11.
  • the ovoid section of the operating channel 9 in the distal face 11d of the support 11 occupies an area greater than or equal to at least 50% of the area of the distal face of the support.
  • the ovoid section of the hole 12 in the distal face 11d of the support 11 occupies an area greater than or equal to at least 50% of the area of the distal face 11d of the support.
  • the ovoid section of the working channel 9 in the distal face 11d of the support 11 occupies an area between 50% and 60% of the area of the distal face of the support 11.
  • the ovoid section of the hole 12 in the distal face 11d of the support 11 occupies an area between 50% and 60% of the area of the distal face of the support 11.
  • the ovoid section of the operating channel 9 evolves from the distal face of the support 11, to end in a circular section.
  • the ovoid section of the hole 12 evolves from the distal face of the support 11, to end in a circular section at the level of the stop face 13. It should be noted that the The profile of the section of the hole 12 changes considering that the section of the hole 12 at the level of the distal face 11d is greater than the section of the hole 12 at the level of the abutment surface 13.
  • the operating channel 9 is delimited by an internal surface provided, from the distal face 11d of the support 11, with grooves or ribs 15 in the form of a helix.
  • the hole 12 is delimited by an internal surface provided from the distal face 11d of the support 11 with grooves or ribs 15 in the form of a helix.
  • the ribs or helices 15 are at least 3 in number, and will generate a vortex effect, aimed at mixing and rotating fluids and phlegm of different viscosities or shapes. The purpose of this phenomenon is to entrain them in a helical movement in order to improve the evacuation of these in the working channel 9.
  • the support 11 comprises a passage 16 for mounting, as a video system V, an optical lens 17 or a vision sensor and at least one and in the illustrated example of two light sources 18.
  • the passage 16 is arranged in the support 11 to pass right through it, opening out on the proximal face llp and on the distal face lld.
  • This passage 16 is independent with respect to the operating channel 9 arranged in the support 11.
  • the passage 16 opens into the part of the distal face 11d, located opposite the semicircular edge 11d, between the central edge 11 5 of the support 11 and the central edge 12 3 delimiting the hole 12.
  • the optical lens or the vision sensor 17 and the light sources 18 are coated along the distal face of the support, with a transparent protective material 19.
  • the optical lens 17 or the vision sensor and the light sources 18 are embedded in the mounting passage 16, by the transparent protective material 19.
  • the support 11 is made of a hydrophobic material or coated with a hydrophobic coating.
  • the endoscope according to the invention has the advantage of comprising a distal head with an operating channel 9 having, at the level of the distal face lld, a section enlarged with respect to the operating channel of previous endoscopes making it possible to reduce the phenomena of suction.
  • the widening of the operating channel 9 at the level of the distal face also allows the partial positioning of tools or the maintenance of bulky bodies which will be evacuated during the withdrawal of the endoscope.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Endoscopes (AREA)

Abstract

The invention relates to a distal head for an endoscope, comprising a holder (11) for a vision system, the holder being defined on one side by a proximal face (11p) and on the other side by a distal face (11d) into which the vision system opens, at least one hole (12) of an operating channel (9) passing through the holder (11) and opening into the distal face (11d) via an ovoid cross-section which decreases from the distal face (11d) of the holder towards the proximal face (11p) of the holder (11).

Description

Description Description
Titre de l'invention : Tête distale pour endoscope pourvue d'un canal de travail élargi Title of the invention: Distal endoscope head provided with an enlarged working channel
Domaine Technique Technical area
[0001]La présente invention concerne le domaine technique des endoscopes médicaux au sens général permettant d'accéder à l'intérieur d'un corps comme une cavité ou un canal par exemple et elle vise les endoscopes à caractère réutilisable ou à usage unique. The present invention relates to the technical field of medical endoscopes in the general sense allowing access to the interior of a body such as a cavity or a channel for example and it relates to endoscopes of a reusable or single-use nature.
[0002] La présente invention concerne plus précisément la tête distale de tels endoscopes, adaptée pour assurer de multiples fonctions telles que la visualisation, l'amenée de fluide, l'aspiration de fluide, l'amenée d'instruments, la réalisation de prélèvements ou d'opérations de chirurgie par exemple. [0002] The present invention relates more specifically to the distal head of such endoscopes, suitable for performing multiple functions such as viewing, supplying fluid, suctioning fluid, supplying instruments, taking samples. or surgical operations for example.
[0003] L'endoscope équipé de la tête distale conforme à l'invention trouve des applications particulièrement avantageuses pour permettre d'accéder à la surface interne d'un organe creux, d'une cavité ou d'un conduit naturel ou artificiel du corps humain en vue d'effectuer diverses opérations à des fins thérapeutiques, chirurgicales ou de diagnostic. The endoscope equipped with the distal head according to the invention finds particularly advantageous applications for allowing access to the internal surface of a hollow organ, of a cavity or of a natural or artificial duct of the body human to perform various operations for therapeutic, surgical or diagnostic purposes.
[0004] L'endoscope selon l'invention est utilisé à des fins de diagnostic, thérapeutiques ou de chirurgie pour l'inspection de toutes les parties internes du corps humain accessibles par les voies naturelles ou artificielles. Par exemple, l'endoscope selon l'invention peut être utilisé dans le domaine des voies urinaires, des voies gastro-intestinales, du système respiratoire, du système cardiovasculaire, de la trachée, de la cavité du sinus, du système de reproduction de la femme, de la cavité abdominale ou de tout autre partie du corps humain à explorer par une voie naturelle ou artificielle. The endoscope according to the invention is used for diagnostic, therapeutic or surgical purposes for the inspection of all internal parts of the human body accessible by natural or artificial means. For example, the endoscope according to the invention can be used in the field of the urinary tract, the gastrointestinal tract, the respiratory system, the cardiovascular system, the trachea, the sinus cavity, the reproductive system of the woman, the abdominal cavity or any other part of the human body to be explored by a natural or artificial route.
Technique antérieure Prior art
[0005] D'une manière générale, un endoscope médical comporte, comme décrit par exemple par la demande de brevet WO 2014/106510, une poignée de commande à laquelle est fixée une structure tubulaire comportant une tête distale équipée d'un système de vision permettant d'éclairer et d'examiner l'organe, la cavité ou le conduit du corps humain. En amont de la tête distale, la structure tubulaire d'insertion comporte une partie de béquillage permettant d'orienter la tête distale à l'intérieur de la voie d'insertion. In general, a medical endoscope comprises, as described for example by patent application WO 2014/106510, a control handle to which is fixed a tubular structure comprising a distal head equipped with a vision system to illuminate and examine the organ, cavity or the duct of the human body. Upstream of the distal head, the tubular insertion structure includes a baffle portion making it possible to orient the distal head inside the insertion path.
[0006] Cette structure tubulaire est adaptée pour permettre d'amener au niveau de la tête distale, un ou plusieurs appareillages conçus pour réaliser différentes fonctions telles que par exemple l'amenée de fluide, l'aspiration de fluide, l'amenée d'instruments, la réalisation de prélèvements ou d'opérations de chirurgie. La tête distale de l'endoscope est également équipée d'au moins un canal dit opérateur ou de travail pour permettre le passage de ces divers appareillages. This tubular structure is adapted to allow to bring at the level of the distal head, one or more devices designed to perform different functions such as for example the supply of fluid, the suction of fluid, the supply of instruments, taking samples or performing surgery. The distal head of the endoscope is also equipped with at least one so-called operator or working channel to allow the passage of these various devices.
[0007]Ainsi, un tel endoscope est pourvu d'une tête distale multifonctions configurée pour permettre l'implantation du système de vision et le passage de ces divers appareillages. Toutefois, cette tête distale possède une section de passage ou d'encombrement qui est limitée par la plus petite largeur de la voie d'accès naturelle ou artificielle dans laquelle la structure tubulaire est engagée. Compte tenu de la diversité des fonctionnalités que doit présenter un endoscope et des contraintes dimensionnelles imposées par la voie d'accès, il apparaît une difficulté pour configurer la tête distale afin que puisse être mené à bien certaines fonctions de l'endoscope. Tel est le cas notamment de la fonction d'aspiration de liquides, le retrait de corps volumineux ou l'utilisation d'outils encombrants tels qu'une pince à biopsie. Il apparaît aussi des phénomènes de succion sur les muqueuses susceptibles de conduire à des hémorragies. Outre les pertes de performances qui en découlent, la tête distale d'un tel endoscope est relativement complexe à réaliser, augmentant son coût de fabrication. [0007] Thus, such an endoscope is provided with a multifunctional distal head configured to allow the implantation of the vision system and the passage of these various devices. However, this distal head has a passage or bulk section which is limited by the smaller width of the natural or artificial access path in which the tubular structure is engaged. Taking into account the diversity of functions that an endoscope must have and the dimensional constraints imposed by the access route, a difficulty arises in configuring the distal head so that certain functions of the endoscope can be carried out. This is the case in particular with the function of aspiration of liquids, the removal of bulky bodies or the use of bulky tools such as a biopsy forceps. Sucking phenomena also appear on the mucous membranes which may lead to hemorrhages. In addition to the resulting performance losses, the distal head of such an endoscope is relatively complex to produce, increasing its manufacturing cost.
[0008] La demande de brevet US 2017/0143199 décrit un bronchoscope comportant un tube rigide délimitant un canal de travail séparé d'un canal matériel par une paroi interne. Un composant d'éclairage et un composant d'imagerie sont fixés à l'extrémité distale du canal matériel. Le tube rigide est biseauté à l'extrémité distale pour augmenter la taille de l'ouverture du canal de travail et réduire la dimension globale de l'extrémité distale du tube. Si l'extrémité distale d'un tel tube est réduite, sa forme biseautée n'offre pas une totale sécurité pour accéder à l'intérieur de corps présentant des voies d'accès avec des formes particulières. Une telle forme est par ailleurs moins efficace pour assurer une bonne aspiration des liquides, sans perte de charge. [0008] Patent application US 2017/0143199 describes a bronchoscope comprising a rigid tube delimiting a working channel separated from a material channel by an internal wall. An illumination component and an imaging component are attached to the distal end of the hardware channel. The rigid tube is bevelled at the distal end to increase the size of the working channel opening and reduce the overall dimension of the distal end of the tube. If the distal end of such a tube is reduced, its bevelled shape does not offer complete security to access inside bodies with access routes with particular shapes. Such a shape is also less effective in ensuring good suction of liquids, without loss of pressure.
[0009] La demande de brevet EP 1 772 095 décrit un endoscope pourvu d'un instrument adapté pour pivoter à son extrémité distale. L'instrument est inséré dans le canal opérateur en débouchant par une ouverture de forme elliptique, dans un logement aménagé dans la tête distale et dans lequel est logé un support actionné en pivotement. Cet endoscope présente une tête distale avec un encombrement important et n'est pas adapté pour notamment l'aspiration de fluide. [0009] Patent application EP 1 772 095 describes an endoscope provided with an instrument adapted to pivot at its distal end. The instrument is inserted into the operating channel, opening through an elliptical opening, into a housing provided in the distal head and in which a pivotally actuated support is housed. This endoscope has a distal head with a large bulk and is not suitable for, in particular, the suction of fluid.
[0010]La demande brevet US 2013/0150667 décrit un endoscope présentant notamment un canal opérateur comportant un insert tubulaire conducteur monté d'un côté dans un logement aménagé dans la tête distale et de l'autre côté, dans un tube. Il n'y a pas de changement de section dudit canal opérateur permettant d'accroître l'aspiration, en entrée côté distal. Cet endoscope présente une tête distale avec un encombrement important. US patent application 2013/0150667 describes an endoscope in particular having an operating channel comprising a conductive tubular insert mounted on one side in a housing provided in the distal head and on the other side in a tube. There is no change in section of said operating channel making it possible to increase the suction, at the inlet on the distal side. This endoscope has a distal head with a large footprint.
Exposé de l'invention Disclosure of the invention
[0011]La présente invention vise donc à remédier aux inconvénients de l'état de la technique en proposant une nouvelle tête distale pour endoscope, de conception simple et peu coûteuse, adaptée pour permettre la mise en oeuvre complète et efficace des différentes fonctions de l'endoscope. [0011] The present invention therefore aims to remedy the drawbacks of the state of the art by proposing a new distal head for an endoscope, of simple and inexpensive design, adapted to allow the complete and efficient implementation of the various functions of the endoscope.
[0012]La présente invention vise également à proposer une nouvelle tête distale pour endoscope offrant un encombrement limité tout en permettant d'optimiser l'aspiration des fluides et de limiter les phénomènes de succion. [0012] The present invention also aims to provide a new distal head for an endoscope offering limited space while making it possible to optimize the suction of fluids and to limit the suction phenomena.
[0013]Pour atteindre un tel objectif, la tête distale pour endoscope comporte un support pour un système de vision, le support étant délimité d'un côté, par une face proximale et du côté opposé, par une face distale parallèle à la face proximale et dans laquelle débouche le système de vision, le support étant traversé par au moins un trou d'un canal opérateur débouchant dans la face distale par une section ovoïde dont la surface projetée par rapport à l'axe du trou décroît à partir de la face distale du support en direction de la face proximale du support, la section ovoïde du canal opérateur dans la face distale occupant une surface supérieure ou égale à au moins 50 % de la surface de la face distale du support. To achieve such an objective, the distal endoscope head comprises a support for a vision system, the support being delimited on one side, by a proximal face and on the opposite side, by a distal face parallel to the proximal face and into which the vision system opens, the support being crossed by at least one hole of an operating channel opening into the distal face by an ovoid section, the surface of which is projected relative to the axis of the hole decreases from the distal face of the carrier towards the proximal face of the carrier, the ovoid section of the working channel in the distal face occupying an area greater than or equal to at least 50% of the area of the distal face of the carrier.
[0014]Typiquement, la section ovoïde du trou du canal opérateur dans la face distale du support occupe une surface comprise entre 50 % et 60 % de la surface de la face distale du support. Typically, the ovoid section of the hole of the operating channel in the distal face of the support occupies an area of between 50% and 60% of the surface of the distal face of the support.
[0015]Par exemple, la section ovoïde du trou du canal opérateur évolue à partir de la face distale du support, pour se terminer par une section circulaire. For example, the ovoid section of the hole of the operating channel evolves from the distal face of the support, to end in a circular section.
[0016] Avantageusement, la section ovoïde du trou du canal opérateur évolue à partir de la face distale du support, pour se terminer par une section circulaire, au niveau d'une surface de butée pour une extrémité du conduit délimitant le canal opérateur. Advantageously, the ovoid section of the hole of the operating channel evolves from the distal face of the support, to end in a circular section, at a stop surface for one end of the duct delimiting the operating channel.
[0017]Selon un exemple préféré de réalisation, la section ovoïde du trou du canal opérateur est délimité au niveau de la face distale, par un bord périphérique en arc de cercle concentrique à la surface externe du support et raccordé de part et d'autre, par des bords de raccordement à un bord central en arc de cercle dont le rayon est supérieur au rayon du bord périphérique. According to a preferred embodiment, the ovoid section of the hole of the operating channel is delimited at the level of the distal face, by a peripheral edge in an arc of a circle concentric with the outer surface of the support and connected on both sides , by connecting edges to a central edge in an arc of a circle, the radius of which is greater than the radius of the peripheral edge.
[0018]Selon une variante avantageuse de réalisation, le support se présente sous la forme d'une bague délimitée d'un côté par la face distale et de l'autre côté par la face proximal, les faces distale et proximale étant parallèles entre elles et perpendiculaires à l'axe longitudinal de la bague. According to an advantageous variant embodiment, the support is in the form of a ring delimited on one side by the distal face and on the other side by the proximal face, the distal and proximal faces being parallel to each other and perpendicular to the longitudinal axis of the ring.
[0019]Selon une variante avantageuse de réalisation, le trou du canal opérateur est délimité par une surface interne pourvue à partir de la face distale du support, de rainures ou de nervures en forme d'hélice. According to an advantageous variant embodiment, the hole of the operating channel is delimited by an internal surface provided, starting from the distal face of the support, with grooves or ribs in the form of a helix.
[0020]Avantageusement, le support comporte un passage pour le montage, en tant que système vidéo, d'une lentille optique ou d'un capteur de vision et d'au moins une source lumineuse, revêtus selon la face distale du support, d'un matériau de protection transparent. [0021]Selon un exemple de réalisation, la lentille optique ou le capteur de vision et au moins la source lumineuse, sont noyés dans le passage de montage, par le matériau de protection transparent. Advantageously, the support comprises a passage for mounting, as a video system, an optical lens or a vision sensor and at least one light source, coated on the distal face of the support, d 'transparent protective material. According to an exemplary embodiment, the optical lens or the vision sensor and at least the light source are embedded in the mounting passage, by the transparent protective material.
[0022] Par exemple, le support comporte à partir de la face proximale, une section cylindrique prolongée par une section rétrécie diminuant jusqu'à la face distale du support pour présenter au niveau de la face distale, une section pseudotriangulaire. For example, the support comprises from the proximal face, a cylindrical section extended by a narrowed section decreasing to the distal face of the support to present at the level of the distal face, a pseudotriangular section.
[0023] En pratique, le passage débouche dans la partie de la face distale , située à l'opposé du bord demi-circulaire, entre le bord central du support et le bord central délimitant le trou. In practice, the passage opens into the part of the distal face, located opposite the semicircular edge, between the central edge of the support and the central edge delimiting the hole.
[0024] Un autre objet de l'invention est de proposer un tube d'insertion relié à sa partie proximale, à une poignée de commande et équipé à sa partie distale, d'une tête distale conforme à l'invention. Another object of the invention is to provide an insertion tube connected at its proximal part, to a control handle and equipped at its distal part, with a distal head according to the invention.
[0025] Diverses autres caractéristiques ressortent de la description faite ci-dessous en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, des formes de réalisation de l'objet de l'invention. Various other characteristics emerge from the description given below with reference to the accompanying drawings which show, by way of non-limiting examples, embodiments of the object of the invention.
Brève description des dessins Brief description of the drawings
[0026] [Fig. l]La Figure 1 est une vue générale d'un endoscope au sens général équipé d'une tête distale conforme à l'invention. [0026] [Fig. l] Figure 1 is a general view of an endoscope in the general sense equipped with a distal head according to the invention.
[0027] [Fig. 2] La Figure 2 est une vue montrant plus particulièrement la partie de béquillage de la tête distale conforme à l'invention. [0027] [Fig. 2] FIG. 2 is a view showing more particularly the crutching part of the distal head according to the invention.
[0028] [Fig. 3] La Figure 3 est une perspective de la tête distale conforme à l'invention vue à partir de sa face distale. [0028] [Fig. 3] Figure 3 is a perspective of the distal head according to the invention seen from its distal face.
[0029] [Fig. 4] La Figure 4 est une perspective de la tête distale vue à partir de sa face proximale. [0029] [Fig. 4] Figure 4 is a perspective of the distal head viewed from its proximal face.
[0030][Fig. 5] La Figure 5 est une vue en plan de la tête distale prise à partir de sa face distale. [0031] [Fig. 6] La Figure 6 est une vue en plan de la tête distale prise à partir de sa face proximale. [0030] [Fig. 5] Figure 5 is a plan view of the distal head taken from its distal face. [0031] [Fig. 6] Figure 6 is a plan view of the distal head taken from its proximal face.
[0032] [Fig. 7] La Figure 7 est une vue analogue de la Fig. 4 montrant la tête distale équipée du conduit opérateur. [0032] [Fig. 7] FIG. 7 is a view analogous to FIG. 4 showing the distal head equipped with the operating conduit.
[0033] [Fig. 8] La Figure 8 est une vue analogue de la Fig. 3, montrant la tête distale équipée du conduit opérateur. [0033] [Fig. 8] FIG. 8 is a view analogous to FIG. 3, showing the distal head equipped with the working conduit.
[0034] [Fig. 9] La Figure 9 est une vue de face d'un autre exemple de réalisation de la tête distale conforme à l'invention. [0034] [Fig. 9] Figure 9 is a front view of another embodiment of the distal head according to the invention.
Description des modes de réalisation Description of the embodiments
[0035] La Fig. 1 illustre à titre d'exemple, un endoscope médical 1 au sens général conçu pour accéder à l'intérieur d'un corps comme une cavité ou un canal par exemple. De manière classique, un endoscope 1 comporte un tube d'insertion 2 présentant d'un côté, une partie proximale 2i reliée à une poignée de commande 3 et du côté opposé, une partie distale 22, qui est équipée d'une tête distale 4 conforme à l'invention. Le tube d'insertion 2 est fixé de manière temporaire ou définitive sur la poignée de commande 3. Ce tube d'insertion 2 qui présente une longueur et une flexibilité plus ou moins importante est destiné à être introduit dans une voie d'accès naturelle ou artificielle en vue d'effectuer diverses opérations ou fonctions à des fins thérapeutiques, chirurgicales ou de diagnostic. Le tube d'insertion 2 est réalisé en un matériau semi-rigide et présente une longueur adaptée à la longueur du conduit à inspecter et pouvant être comprise entre 5 cm et 2 m. Le tube d'insertion 2 présente diverses formes de section transversale telles que carrée, ovale ou circulaire. Ce tube d'insertion 2 qui est en contact avec les tissus, les organes humains ou des appareillages médicaux (trocarts ou sondes), relève essentiellement d'un usage unique ou multiple d'un patient voire d'un usage réutilisable après décontamination, désinfection ou stérilisation. [0035] FIG. 1 illustrates by way of example, a medical endoscope 1 in the general sense designed to access the interior of a body such as a cavity or a channel for example. Conventionally, an endoscope 1 comprises an insertion tube 2 having on one side, a proximal part 2i connected to a control handle 3 and on the opposite side, a distal part 2 2 , which is equipped with a distal head. 4 according to the invention. The insertion tube 2 is fixed temporarily or permanently on the control handle 3. This insertion tube 2 which has a length and a greater or lesser flexibility is intended to be introduced into a natural access route or artificial in order to perform various operations or functions for therapeutic, surgical or diagnostic purposes. The insertion tube 2 is made of a semi-rigid material and has a length adapted to the length of the duct to be inspected and which may be between 5 cm and 2 m. The insertion tube 2 has various cross-sectional shapes such as square, oval or circular. This insertion tube 2, which is in contact with tissues, human organs or medical devices (trocars or probes), essentially involves single or multiple use by a patient or even reusable use after decontamination, disinfection. or sterilization.
[0036] De manière classique, l'endoscope 1 conforme à l'invention comporte un système de vision V apte à éclairer et à ramener une image de la partie distale du tube d'insertion 2. L'endoscope 1 comporte ainsi un système de vision monté à l'intérieur de la poignée de commande 3 et pénétrant à l'intérieur du tube d'insertion 2 jusqu'à la tête distale 4. Conventionally, the endoscope 1 according to the invention comprises a vision system V capable of illuminating and bringing back an image of the distal part of the insertion tube 2. The endoscope 1 thus comprises a system of mounted vision inside the control handle 3 and penetrating inside the insertion tube 2 up to the distal head 4.
[0037]De manière classique, l'endoscope 1 comporte également un mécanisme de commande 5 permettant d'orienter la tête distale 4 par rapport à l'axe longitudinal X du tube d'insertion 2. A cet effet, le tube d'insertion 2 comporte en amont de la tête distale 4, une partie de flexion, de pliage ou de béquillage 6 permettant l'orientation de la tête distale 4 par rapport à l'axe longitudinal X du tube d'insertion 2 (Fig. 2). Conventionally, the endoscope 1 also comprises a control mechanism 5 for orienting the distal head 4 relative to the longitudinal axis X of the insertion tube 2. For this purpose, the insertion tube 2 comprises upstream of the distal head 4, a flexion, folding or bending part 6 allowing the orientation of the distal head 4 with respect to the longitudinal axis X of the insertion tube 2 (FIG. 2).
[0038] Le mécanisme de commande 5 peut être réalisé de toute manière appropriée de manière que la tête distale 4 puisse être déplacée entre une position de repos dans laquelle le tube d'insertion 2 est rectiligne et une position béquillée dans laquelle la partie de béquillage 6 est courbée. A titre d'exemple non limitatif, le mécanisme de commande 5 peut correspondre au mécanisme de commande décrit dans le brevet FR 3 047 887. A cet effet, le mécanisme de commande 5 comporte un levier de commande manuelle entraînant en rotation une poulie sur laquelle est fixé au moins un câble monté à l'intérieur du tube d'insertion 2 pour être fixée à la tête distale 4. The control mechanism 5 can be produced in any suitable manner so that the distal head 4 can be moved between a rest position in which the insertion tube 2 is rectilinear and a crutched position in which the crutching part 6 is curved. By way of non-limiting example, the control mechanism 5 may correspond to the control mechanism described in patent FR 3 047 887. For this purpose, the control mechanism 5 comprises a manual control lever rotating a pulley on which is fixed at least one cable mounted inside the insertion tube 2 to be fixed to the distal head 4.
[0039] De manière classique, l'endoscope 1 comporte également un canal opérateur ou de travail 9 s'étendant de la poignée de commande 3 à la tête distale 4 pour permettre l'amenée de divers outillages et/ou de fluides et/ou l'aspiration de fluides. Ce canal opérateur 9 est délimité par un tuyau ou conduit 10 positionné à l'intérieur du tube d'insertion 2 (Fig. 7, 8). Conventionally, the endoscope 1 also comprises an operating or working channel 9 extending from the control handle 3 to the distal head 4 to allow the supply of various tools and / or fluids and / or suction of fluids. This operating channel 9 is delimited by a pipe or conduit 10 positioned inside the insertion tube 2 (Fig. 7, 8).
[0040]Conformément à l'invention, la tête distale 4 comporte un corps ou un support 11 se présentant sous la forme d'une bague délimitée du côté le plus proche de la poignée de commande 3, par une face proximale llp et du côté opposé le plus éloigné de la poignée de commande, par une face distale lld dans laquelle débouche le système de vision V. Tel que cela ressort des dessins, cette bague ou support 11 est délimité d'un côté par la face distale lld et de l'autre côté par la face proximale llp. La face distale lld et la face proximale llp sont parallèles entre elles et perpendiculaires à l'axe longitudinal de la bague ou du support. According to the invention, the distal head 4 comprises a body or a support 11 in the form of a ring delimited on the side closest to the control handle 3, by a proximal face llp and on the side furthest from the control handle, by a distal face lld into which opens the vision system V. As shown in the drawings, this ring or support 11 is delimited on one side by the distal face lld and the 'other side by the proximal face llp. The distal face lld and the proximal face llp are mutually parallel and perpendicular to the longitudinal axis of the ring or of the support.
[0041]Tel que cela ressort des Fig. 3 et 4, le support 11 comporte à partir de la face proximale llp, une surface externe délimitant une section cylindrique circulaire 11c prolongée par une section rétrécie lie diminuant jusqu'à la face distale lld du support 11. Dans l'exemple de réalisation illustrée sur les Fig. 3, 5 et 8, la face distale lld du support 11 présente une section ou un profil pseudo-triangulaire délimité par un bord demi-circulaire lli se prolongeant de part et d'autre, par des bords de raccordement 112, à des bords rectilignes 113 convergents se raccordant par des bords de liaison 114, à un bord central 115 en arc de cercle, de rayon inférieur au rayon du bord demi-circulaire lli. La section rétrécie lie du support possède ainsi un profil qui évolue d'un profil pseudo-triangulaire à un profil circulaire venant se raccorder par une section de raccordement cylindrique llr, à la section cylindrique circulaire 11c du support 11. La section cylindrique circulaire 11c présente un diamètre plus petit que le diamètre de la section de raccordement cylindrique llr pour définir un épaulement 11b. Cette section cylindrique circulaire 11c est adaptée pour recevoir une gaine de protection 6i pour la partie de béquillage 6. As emerges from Figs. 3 and 4, the support 11 comprises, from the proximal face 11p, an outer surface delimiting a circular cylindrical section 11c extended by a narrowed section 11c decreasing to the distal face 11d of the support 11. In the illustrated embodiment in Figs. 3, 5 and 8, the distal face lld of the support 11 has a section or a pseudo-triangular profile delimited by a semicircular edge lli extending on either side, by connecting edges 11 2 , to the edges rectilinear 11 3 converging being connected by connecting edges 11 4 , to a central edge 11 5 in the form of an arc of a circle, with a radius smaller than the radius of the semi-circular edge III. The narrowed section of the support thus has a profile which evolves from a pseudo-triangular profile to a circular profile coming to be connected by a cylindrical connection section llr, to the circular cylindrical section 11c of the support 11. The circular cylindrical section 11c has a diameter smaller than the diameter of the cylindrical connecting section llr to define a shoulder 11b. This circular cylindrical section 11c is adapted to receive a protective sheath 6i for the lever part 6.
[0042] Le support 11 de la tête distale 4 est traversé de part en part, par le canal opérateur 9 pour déboucher dans la face distale lld. Dans l'exemple de réalisation illustré sur les dessins (Fig. 3 à 6), un trou 12 est aménagé dans le support 11 à partir de la face distale lld pour former la partie terminale du canal opérateur 9. Ce trou 12 s'étend jusqu'à une surface de butée 13 aménagée dans le support 11 pour servir de butée à l'extrémité du conduit 10 qui communique ainsi avec ce trou 12. The support 11 of the distal head 4 is crossed right through, by the operating channel 9 to open into the distal face lld. In the exemplary embodiment illustrated in the drawings (Figs. 3 to 6), a hole 12 is made in the support 11 from the distal face 11d to form the end part of the working channel 9. This hole 12 extends. up to a stop surface 13 arranged in the support 11 to serve as a stop at the end of the duct 10 which thus communicates with this hole 12.
[0043]Tel que cela ressort plus précisément des Fig. 4 et 7, le support 11 présente deux bras de fixation 14 s'étendant en saillie à partir de la face proximale llp du support, pour délimiter entre eux, un passage 14a pour le conduit 10 qui est en appui sur la surface de butée 13. Ces deux bras de fixation 14 agissent ainsi comme des pinces de fixation pour le conduit 10 de sorte que le canal opérateur 9 s'étend ainsi de la poignée de commande 3 jusqu'à la face distale lld la tête distale 4, à l'aide du conduit 10 se prolongeant par le trou 12. Ainsi, le conduit 10 est engagé à partir de la face proximale llp du support, à l'intérieur d'un logement du support 11 pour venir en appui sur la surface de butée 13 située en retrait de la face proximale llp du support. Par exemple, chaque bras de fixation 14 comporte un téton 14i destiné à coopérer avec une ouverture oblongue aménagée dans la partie de béquillage 6 pour constituer un assemblage baïonnette entre la tête distale 4 et la partie de béquillage 6. As emerges more precisely from Figs. 4 and 7, the support 11 has two fixing arms 14 projecting from the proximal face llp of the support, to delimit between them, a passage 14a for the duct 10 which rests on the abutment surface 13 These two fixation arms 14 thus act as fixation clamps for the conduit 10 so that the operating channel 9 thus extends from the control handle 3 to the distal face 11 of the head. distal 4, using the conduit 10 extending through the hole 12. Thus, the conduit 10 is engaged from the proximal face llp of the support, inside a housing of the support 11 to come to rest on the stop surface 13 set back from the proximal face llp of the support. For example, each fixing arm 14 comprises a stud 14i intended to cooperate with an oblong opening made in the crutch part 6 to constitute a bayonet assembly between the distal head 4 and the crutch part 6.
[0044]Selon une caractéristique de l'invention, le canal opérateur 9 possède au niveau de la tête distale 4, une section qui décroît en direction de la face proximale llp du support 11. Dans l'exemple de réalisation illustré sur les dessins, le trou 12 du support 11 possède une section qui décroît en direction de la face proximale llp du support 11. La section du trou 12 est ainsi la plus petite au niveau de la surface de butée 13 et s'élargit en direction de la face distale lld du support 11. According to one characteristic of the invention, the operating channel 9 has at the level of the distal head 4, a section which decreases in the direction of the proximal face llp of the support 11. In the embodiment illustrated in the drawings, the hole 12 of the support 11 has a section which decreases in the direction of the proximal face llp of the support 11. The section of the hole 12 is thus the smallest at the level of the stop surface 13 and widens in the direction of the distal face lld of support 11.
[0045] Le canal opérateur 9 possède une section qui décroît à partir de la face distale lld du support 11. Dans l'exemple de réalisation illustré sur les dessins, le trou 12 possède une section qui décroît à partir de la face distale lld du support et jusqu'à la surface de butée 13. La section du trou 12 est ainsi la plus petite au niveau de la surface de butée 13 et s'élargit jusqu'à la face distale lld du support 11. Par exemple, la section du trou 12 décroît progressivement entre la face distale lld du support 11 et la surface de butée 13. The operating channel 9 has a section which decreases from the distal face lld of the support 11. In the exemplary embodiment illustrated in the drawings, the hole 12 has a section which decreases from the distal face lld of the support and up to the stop surface 13. The section of the hole 12 is thus the smallest at the level of the stop surface 13 and widens to the distal face 11d of the support 11. For example, the section of the hole 12 gradually decreases between the distal face 11d of the support 11 and the abutment surface 13.
[0046]Selon une autre caractéristique de l'invention, le canal opérateur 9 débouche dans la face distale lld du support 11 par une section ovoïde. Dans l'exemple de réalisation illustré, le trou 12 est délimité au niveau de la face distale lld, par un bord périphérique 12i en arc de cercle raccordé de part et d'autre, par des bords de raccordement 122, à un bord central 123 en arc de cercle dont le rayon est supérieur au rayon du bord périphérique 12i. Par exemple le bord périphérique 12i est concentrique au support 11 et plus précisément à la surface externe du support 11 (section rétrécie lie) pour maximiser la zone d'aspiration, et présente un rayon de courbure Ri. Avantageusement, le bord central 123 a un rayon de courbure, R2, tel que RI<R2<4XRI. Le canal opérateur 9 débouche ainsi dans la face distale lld par une section ovoïde dont la surface projetée par rapport à l'axe du trou 12 décroît à partir de la face distale lld du support en direction de la face proximale llp du support 11. According to another characteristic of the invention, the operating channel 9 opens into the distal face lld of the support 11 via an ovoid section. In the exemplary embodiment illustrated, the hole 12 is delimited at the level of the distal face lld, by a peripheral edge 12i in an arc of a circle connected on either side, by connecting edges 12 2 , to a central edge. 12 3 in a circular arc, the radius of which is greater than the radius of the peripheral edge 12i. For example, the peripheral edge 12i is concentric with the support 11 and more precisely with the external surface of the support 11 (narrowed section lie) in order to maximize the suction zone, and has a radius of curvature Ri. Advantageously, the central edge 12 3 has a radius of curvature, R 2, such that R I <R 2 <4XR I. The operating channel 9 thus opens into the distal face 11d by an ovoid section whose projected area relative to the axis of the hole 12 decreases from the distal face 11d of the support towards the proximal face 11p of the support 11.
[0047]Avantageusement, la section ovoïde du canal opérateur 9 dans la face distale lld du support 11 occupe une surface supérieure ou égale à au moins 50 % de la surface de la face distale du support. En d'autres termes, la section ovoïde du trou 12 dans la face distale lld du support 11 occupe une surface supérieure ou égale à au moins 50 % de la surface de la face distale lld du support. De préférence, la section ovoïde du canal opérateur 9 dans la face distale lld du support 11 occupe une surface comprise entre 50 % et 60 % de la surface de la face distale du support 11. En d'autres termes, la section ovoïde du trou 12 dans la face distale lld du support 11 occupe une surface comprise entre 50 % et 60 % de la surface de la face distale du support 11. Advantageously, the ovoid section of the operating channel 9 in the distal face 11d of the support 11 occupies an area greater than or equal to at least 50% of the area of the distal face of the support. In other words, the ovoid section of the hole 12 in the distal face 11d of the support 11 occupies an area greater than or equal to at least 50% of the area of the distal face 11d of the support. Preferably, the ovoid section of the working channel 9 in the distal face 11d of the support 11 occupies an area between 50% and 60% of the area of the distal face of the support 11. In other words, the ovoid section of the hole 12 in the distal face 11d of the support 11 occupies an area between 50% and 60% of the area of the distal face of the support 11.
[0048]Selon une autre caractéristique de l'invention, la section ovoïde du canal opérateur 9 évolue à partir de la face distale du support 11, pour se terminer par une section circulaire. Dans l'exemple de réalisation illustré sur les dessins, la section ovoïde du trou 12 évolue à partir de la face distale du support 11, pour se terminer par une section circulaire au niveau de la face de butée 13. Il est à noter que le profil de la section du trou 12 évolue en considérant que la section du trou 12 au niveau de la face distale lld est supérieure à la section du trou 12 au niveau de la surface de butée 13. According to another characteristic of the invention, the ovoid section of the operating channel 9 evolves from the distal face of the support 11, to end in a circular section. In the exemplary embodiment illustrated in the drawings, the ovoid section of the hole 12 evolves from the distal face of the support 11, to end in a circular section at the level of the stop face 13. It should be noted that the The profile of the section of the hole 12 changes considering that the section of the hole 12 at the level of the distal face 11d is greater than the section of the hole 12 at the level of the abutment surface 13.
[0049]Selon une variante avantageuse de réalisation, le canal opérateur 9 est délimité par une surface interne pourvue à partir de la face distale lld du support 11, de rainures ou de nervures 15 en forme d'hélice. Dans l'exemple de réalisation illustré sur la Fig. 9, le trou 12 est délimité par une surface interne pourvue à partir de la face distale lld du support 11, de rainures ou de nervures 15 en forme d'hélice. Les nervures ou hélices 15 sont au nombre de 3 minimum, et vont générer un effet vortex, visant à mélanger et à mettre en rotation les fluides et mucosités de viscosités ou de formes différentes. Ce phénomène a pour but de les entraîner dans un mouvement hélicoïdal afin d'améliorer l'évacuation de ceux-ci dans le canal opérateur 9. [0050]SeIon une autre caractéristique avantageuse de réalisation, le support 11 comporte un passage 16 pour le montage, en tant que système vidéo V, d'une lentille optique 17 ou d'un capteur de vision et d'au moins une et dans l'exemple illustré de deux sources lumineuses 18. Le passage 16 est aménagé dans le support 11 pour le traverser de part en part en débouchant sur la face proximale llp et sur la face distale lld. Ce passage 16 est indépendant par rapport au canal opérateur 9 aménagé dans le support 11. Tel que cela ressort des dessins, le passage 16 débouche dans la partie de la face distale lld, située à l'opposé du bord demi-circulaire lli, entre le bord central 115 du support 11 et le bord central 123 délimitant le trou 12. Selon une caractéristique avantageuse, la lentille optique ou le capteur de vision 17 et les sources lumineuses 18 sont revêtus selon la face distale du support, d'un matériau de protection transparent 19. According to an advantageous variant embodiment, the operating channel 9 is delimited by an internal surface provided, from the distal face 11d of the support 11, with grooves or ribs 15 in the form of a helix. In the exemplary embodiment illustrated in FIG. 9, the hole 12 is delimited by an internal surface provided from the distal face 11d of the support 11 with grooves or ribs 15 in the form of a helix. The ribs or helices 15 are at least 3 in number, and will generate a vortex effect, aimed at mixing and rotating fluids and phlegm of different viscosities or shapes. The purpose of this phenomenon is to entrain them in a helical movement in order to improve the evacuation of these in the working channel 9. According to another advantageous characteristic of embodiment, the support 11 comprises a passage 16 for mounting, as a video system V, an optical lens 17 or a vision sensor and at least one and in the illustrated example of two light sources 18. The passage 16 is arranged in the support 11 to pass right through it, opening out on the proximal face llp and on the distal face lld. This passage 16 is independent with respect to the operating channel 9 arranged in the support 11. As can be seen from the drawings, the passage 16 opens into the part of the distal face 11d, located opposite the semicircular edge 11d, between the central edge 11 5 of the support 11 and the central edge 12 3 delimiting the hole 12. According to an advantageous characteristic, the optical lens or the vision sensor 17 and the light sources 18 are coated along the distal face of the support, with a transparent protective material 19.
[0051] Avantageusement, la lentille optique 17 ou le capteur de vision et les sources lumineuses 18, sont noyés dans le passage de montage 16, par le matériau de protection transparent 19. Advantageously, the optical lens 17 or the vision sensor and the light sources 18 are embedded in the mounting passage 16, by the transparent protective material 19.
[0052] De préférence, le support 11 est réalisé en un matériau hydrophobe ou revêtu par un revêtement hydrophobe. Preferably, the support 11 is made of a hydrophobic material or coated with a hydrophobic coating.
[0053] L'endoscope selon l'invention présente l'avantage de comporter une tête distale avec un canal opérateur 9 présentant au niveau de la face distale lld, une section élargie par rapport au canal opérateur des endoscopes antérieurs permettant de réduire les phénomènes de succion. L'élargissement du canal opérateur 9 au niveau de la face distale permet également le positionnement partiel d'outils ou le maintien de corps encombrant qui seront évacués lors du retrait de l'endoscope. The endoscope according to the invention has the advantage of comprising a distal head with an operating channel 9 having, at the level of the distal face lld, a section enlarged with respect to the operating channel of previous endoscopes making it possible to reduce the phenomena of suction. The widening of the operating channel 9 at the level of the distal face also allows the partial positioning of tools or the maintenance of bulky bodies which will be evacuated during the withdrawal of the endoscope.
[0054] L’invention n’est pas limitée aux exemples décrits et représentés car diverses modifications peuvent y être apportées sans sortir de son cadre. The invention is not limited to the examples described and shown because various modifications can be made to it without departing from its scope.

Claims

Revendications Claims
[Revendication 1] Tête distale pour endoscope (1) comportant un support (11) pour un système de vision (V), le support étant délimité d'un côté, par une face proximale (llp) et du côté opposé, par une face distale (lld) parallèle à la face proximale (llp) et dans laquelle débouche le système de vision (V), le support (11) étant traversé par au moins un trou (12) d'un canal opérateur (9) débouchant dans la face distale (lld) par une section ovoïde dont la surface projetée par rapport à l'axe du trou (12) décroît à partir de la face distale (lld) du support en direction de la face proximale (llp) du support (11), la section ovoïde du trou (12) du canal opérateur (9) dans la face distale (lld) occupant une surface supérieure ou égale à au moins 50 % de la surface de la face distale (lld) du support (11). [Claim 1] Distal endoscope head (1) comprising a support (11) for a vision system (V), the support being delimited on one side, by a proximal face (llp) and on the opposite side, by a face distal (lld) parallel to the proximal face (llp) and into which opens the vision system (V), the support (11) being crossed by at least one hole (12) of an operating channel (9) opening into the distal face (lld) by an ovoid section whose projected area relative to the axis of the hole (12) decreases from the distal face (lld) of the support towards the proximal face (llp) of the support (11) , the ovoid section of the hole (12) of the operating channel (9) in the distal face (11d) occupying an area greater than or equal to at least 50% of the area of the distal face (11d) of the support (11).
[Revendication 2] Tête distale selon la revendication 1, selon laquelle la section ovoïde du trou (12) du canal opérateur (9) dans la face distale (lld) du support (11) occupe une surface comprise entre 50 % et 60 % de la surface de la face distale (lld) du support (11). [Claim 2] A distal head according to claim 1, wherein the ovoid section of the hole (12) of the working channel (9) in the distal face (11d) of the support (11) occupies an area of between 50% and 60% of the surface of the distal face (11d) of the support (11).
[Revendication 3] Tête distale selon l'une des revendications 1 ou 2, selon laquelle la section ovoïde du trou (12) du canal opérateur (9) évolue à partir de la face distale (lld) du support (11), pour se terminer par une section circulaire. [Claim 3] A distal head according to one of claims 1 or 2, according to which the ovoid section of the hole (12) of the operating channel (9) evolves from the distal face (lld) of the support (11), to be end with a circular section.
[Revendication 4] Tête distale selon l'une des revendications précédentes, selon laquelle la section ovoïde du trou (12) du canal opérateur (9) évolue à partir de la face distale (lld) du support (11), pour se terminer par une section circulaire, au niveau d'une surface de butée (13) pour une extrémité du conduit (10) délimitant le canal opérateur (9). [Claim 4] Distal head according to one of the preceding claims, according to which the ovoid section of the hole (12) of the operating channel (9) evolves from the distal face (11d) of the support (11), to end with a circular section, at the level of a stop surface (13) for one end of the duct (10) delimiting the operating channel (9).
[Revendication 5] Tête distale selon l'une des revendications précédentes, selon laquelle la section ovoïde du trou (12) du canal opérateur (9) est délimité au niveau de la face distale (lld), par un bord périphérique (12i) en arc de cercle concentrique à la surface externe (lie) du support (11) et raccordé de part et d'autre, par des bords de raccordement (122) à un bord central (123) en arc de cercle dont le rayon est supérieur au rayon du bord périphérique (12i). [Claim 5] distal head according to one of the preceding claims, according to which the ovoid section of the hole (12) of the operating channel (9) is delimited at the level of the distal face (lld), by a peripheral edge (12i) in arc of a circle concentric with the outer surface (lie) of the support (11) and connected on both sides, by connecting edges (12 2 ) to one edge central (12 3 ) in an arc of a circle, the radius of which is greater than the radius of the peripheral edge (12i).
[Revendication 6] Tête distale selon l'une des revendications précédentes, selon laquelle le support (11) se présente sous la forme d'une bague délimitée d'un côté par la face distale (lld) et de l'autre côté par la face proximal (llp), les faces distale (lld) et proximale (llp) étant parallèles entre elles et perpendiculaires à l'axe longitudinal de la bague. [Claim 6] A distal head according to one of the preceding claims, according to which the support (11) is in the form of a ring delimited on one side by the distal face (11d) and on the other side by the proximal face (llp), the distal (lld) and proximal (llp) faces being mutually parallel and perpendicular to the longitudinal axis of the ring.
[Revendication 7] Tête distale selon l'une des revendications précédentes, selon laquelle le trou (12) du canal opérateur (9) est délimité par une surface interne pourvue à partir de la face distale (lld) du support (11), de rainures ou de nervures (15) en forme d'hélice. [Claim 7] Distal head according to one of the preceding claims, according to which the hole (12) of the operating channel (9) is delimited by an internal surface provided from the distal face (11d) of the support (11), with grooves or ribs (15) in the form of a helix.
[Revendication 8] Tête distale selon l'une des revendications précédentes, selon laquelle le support (11) comporte un passage (16) pour le montage, en tant que système vidéo (V), d'une lentille optique ou d'un capteur de vision (17) et d'au moins une source lumineuse (18), revêtus selon la face distale (lld) du support (11), d'un matériau de protection transparent. [Claim 8] Distal head according to one of the preceding claims, wherein the support (11) has a passage (16) for mounting, as a video system (V), an optical lens or a sensor. vision (17) and at least one light source (18), coated along the distal face (11d) of the support (11), with a transparent protective material.
[Revendication 9] Tête distale selon la revendication précédente, selon laquelle la lentille optique ou le capteur de vision (17) et au moins la source lumineuse (18), sont noyés dans le passage (16) de montage aménagé dans le support (11), par le matériau de protection transparent (19). [Claim 9] A distal head according to the preceding claim, according to which the optical lens or the vision sensor (17) and at least the light source (18) are embedded in the mounting passage (16) provided in the support (11). ), by the transparent protective material (19).
[Revendication 10] Tête distale selon l'une des revendications précédentes, selon laquelle le support (11) comporte à partir de la face proximale (llp), une section cylindrique (11c) prolongée par une section rétrécie (lie) diminuant jusqu'à la face distale (lld) du support pour présenter au niveau de la face distale (lld), une section pseudo- triangulaire. [Claim 10] Distal head according to one of the preceding claims, according to which the support (11) comprises, from the proximal face (llp), a cylindrical section (11c) extended by a narrowed section (lie) decreasing to the distal face (lld) of the support to present at the level of the distal face (lld), a pseudo-triangular section.
[Revendication 11] Tête distale selon l'une des revendications 8 ou 9, selon laquelle le passage (16) débouche dans la partie de la face distale (lld), située à l'opposé du bord demi-circulaire (lli), entre le bord central (115) du support (11) et le bord central (123) délimitant le trou (12). [Claim 11] A distal head according to one of claims 8 or 9, according to which the passage (16) opens into the part of the distal face (lld), located opposite the semicircular edge (lli), between the central edge (11 5 ) of the support (11) and the central edge (12 3 ) delimiting the hole (12).
[Revendication 12] Endoscope comportant un tube d'insertion (2) relié à sa partie proximale (2i), à une poignée de commande (3) et équipé à sa partie distale (22), d'une tête distale (4) selon l'une des revendications précédentes. [Claim 12] Endoscope comprising an insertion tube (2) connected at its proximal part (2i), to a control handle (3) and equipped at its distal part (2 2 ), with a distal head (4) according to one of the preceding claims.
EP20853534.4A 2020-01-17 2020-12-22 Distal head for an endoscope, said distal head being provided with an enlarged working channel Pending EP4090219A1 (en)

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FR2000444A FR3106268B1 (en) 2020-01-17 2020-01-17 Distal endoscope head with enlarged working channel
PCT/FR2020/052594 WO2021144514A1 (en) 2020-01-17 2020-12-22 Distal head for an endoscope, said distal head being provided with an enlarged working channel

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DE102016114881A1 (en) * 2016-08-11 2018-02-15 Digital Endoscopy Gmbh Endoscope head, endoscope and albarrane lever holding element

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WO2006009280A1 (en) * 2004-07-23 2006-01-26 Olympus Corporation Endoscope
JP4959934B2 (en) * 2004-10-29 2012-06-27 オリンパス株式会社 Endoscope
FR2962896B1 (en) * 2010-07-26 2012-08-03 Gerald Blouin CLEANING ACCESSORY FOR VISION SYSTEM AND CORRESPONDING CLEANING ASSEMBLY
JP5259892B1 (en) * 2011-09-05 2013-08-07 オリンパスメディカルシステムズ株式会社 Endoscope
WO2014106510A1 (en) 2013-01-07 2014-07-10 Ambu A/S An endoscope camera housing with a guide recess
JP2014212835A (en) * 2013-04-23 2014-11-17 ショーダテクトロン株式会社 Hood for endoscope, and endoscope with same hood for endoscope
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CN114980791A (en) 2022-08-30
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WO2021144514A1 (en) 2021-07-22
JP2023510923A (en) 2023-03-15

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