CN110420007B - Insertion tube assembly for colonoscope - Google Patents
Insertion tube assembly for colonoscope Download PDFInfo
- Publication number
- CN110420007B CN110420007B CN201910815084.7A CN201910815084A CN110420007B CN 110420007 B CN110420007 B CN 110420007B CN 201910815084 A CN201910815084 A CN 201910815084A CN 110420007 B CN110420007 B CN 110420007B
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- main hose
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- 238000003780 insertion Methods 0.000 title claims abstract description 58
- 230000037431 insertion Effects 0.000 title claims abstract description 58
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 239000011527 polyurethane coating Substances 0.000 claims description 22
- 238000009434 installation Methods 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 17
- 229920006264 polyurethane film Polymers 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000009941 weaving Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 1
- 239000004814 polyurethane Substances 0.000 claims 1
- 229920002635 polyurethane Polymers 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 28
- 238000000034 method Methods 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 abstract description 6
- 238000010168 coupling process Methods 0.000 abstract description 6
- 238000005859 coupling reaction Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 239000011295 pitch Substances 0.000 description 33
- 238000003745 diagnosis Methods 0.000 description 12
- 210000001035 gastrointestinal tract Anatomy 0.000 description 8
- 238000003466 welding Methods 0.000 description 8
- 210000003405 ileum Anatomy 0.000 description 6
- 238000001574 biopsy Methods 0.000 description 5
- 210000002429 large intestine Anatomy 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 210000001072 colon Anatomy 0.000 description 4
- 210000001599 sigmoid colon Anatomy 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 206010011409 Cross infection Diseases 0.000 description 3
- 206010029803 Nosocomial infection Diseases 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 230000000968 intestinal effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 239000000645 desinfectant Substances 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 210000000952 spleen Anatomy 0.000 description 2
- 206010021333 Ileus paralytic Diseases 0.000 description 1
- 208000032177 Intestinal Polyps Diseases 0.000 description 1
- 206010022653 Intestinal haemorrhages Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 210000000436 anus Anatomy 0.000 description 1
- 210000004534 cecum Anatomy 0.000 description 1
- 238000003759 clinical diagnosis Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002052 colonoscopy Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 210000001731 descending colon Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 210000000813 small intestine Anatomy 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 210000003384 transverse colon Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
-
- 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
-
- 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
- A61B1/00112—Connection or coupling means
- A61B1/00121—Connectors, fasteners and adapters, e.g. on the endoscope handle
- A61B1/00128—Connectors, fasteners and adapters, e.g. on the endoscope handle mechanical, e.g. for tubes or pipes
-
- 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
- A61B1/00131—Accessories for endoscopes
- A61B1/00137—End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs
-
- 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
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0055—Constructional details of insertion parts, e.g. vertebral 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
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0057—Constructional details of force transmission elements, e.g. control wires
-
- 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
-
- 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
-
- 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
- A61B1/31—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 for the rectum, e.g. proctoscopes, sigmoidoscopes, colonoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/005—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids
- A61M25/0053—Catheters; Hollow probes characterised by structural features with embedded materials for reinforcement, e.g. wires, coils, braids having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Radiology & Medical Imaging (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Optics & Photonics (AREA)
- Pulmonology (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Mechanical Engineering (AREA)
- Endoscopes (AREA)
Abstract
The present invention relates to an insertion tube assembly for a colonoscope, comprising: a main hose comprising a front connection portion, a middle portion, and a rear connection portion; traction spring assembly structure, traction spring assembly structure includes spring retainer plate and four traction springs, the preceding connecting portion at main hose is established to the spring retainer plate, and four spring's one end is established on the spring retainer plate to four springs insert in the interior coil spring pipe, its innovation point lies in: still include operating system coupling mechanism, operating system coupling mechanism includes back seat and fastening nut, back connecting portion fixed connection of back seat and main hose, fastening nut suit is on back seat, be equipped with the constant head tank on the periphery wall of back connecting seat and lie in the outside of fastening nut, four springs are all worn out outside the back seat. The invention does not rotate after being assembled with the operation component and ensures that the bending component does not deviate in the bending process.
Description
Technical Field
The invention relates to an insertion tube assembly, in particular to an insertion tube assembly of a colonoscope, and belongs to the technical field of medical instruments.
Background
Colonoscope is not only an important tool for diagnosing diseases of the large intestine (and the sigmoid colon) and the terminal ileum, but also can be used for treating some diseases of the large intestine (and the sigmoid colon), the ileum and other intestinal tracts, such as the removal of intestinal polyps of the large intestine (and the sigmoid colon), the hemostasis of intestinal bleeding of the large intestine (and the sigmoid colon), the torsion reset of the intestine, the treatment of pseudo-ileus, the expansion of benign stricture of a large intestinal anastomotic stoma, cecostomy and the like.
Colonoscopes are typically made up of the main components of an insertion tube assembly, a bending assembly, a manipulation assembly, a camera, a graphics processor, and the like. The front end of the insertion tube assembly is connected with the bending component, the rear end of the insertion tube assembly is connected with the operation component, the end part of the bending component is provided with a lens, and the graphics processor is matched with the operation component. In the prior art, after the rear end of the insertion tube assembly is connected with the operation part connecting cylinder of the operation assembly, the phenomenon that the insertion tube joint is loosened and the left and right rotation occurs easily, so that the bending assembly deflects in the bending process, the insertability of the colonoscope is seriously affected, the pain of a tested person is increased, and medical equipment faults occur in serious cases.
Disclosure of Invention
The purpose of the invention is that: an insertion tube assembly for a colonoscope is provided which does not rotate when assembled with an operating assembly and which ensures that the bending assembly does not deflect during bending.
In order to achieve the above purpose, the technical scheme of the invention is as follows: an insertion tube assembly for a colonoscope, comprising:
the main hose comprises an outer spiral spring pipe, an inner spiral spring pipe and a woven mesh pipe, wherein the inner spiral spring pipe is arranged in the outer spiral spring pipe, the woven mesh pipe is sleeved on the periphery of the outer spiral spring pipe, the main hose comprises a front connecting part, a middle part and a rear connecting part, the outer spiral spring pipe, the inner spiral spring pipe and the woven mesh pipe of the front connecting part and the rear connecting part are welded into a whole, a medical polyurethane coating is arranged on the periphery of the woven mesh pipe of the middle part, and a medical transparent polyurethane film is arranged on the periphery of the medical polyurethane coating;
Traction spring assembly structure, traction spring assembly structure includes spring retainer plate and four traction springs, the preceding connecting portion at main hose is established to the spring retainer plate, and four traction springs's one end is all established on the spring retainer plate to four traction springs insert in the coil spring pipe, its innovation point lies in:
Still include operating system coupling mechanism, operating system coupling mechanism includes back seat and fastening nut, back connecting portion fixed connection of back seat and main hose, fastening nut suit is on the back seat, be equipped with the constant head tank on the periphery wall of back connecting seat and lie in the outside of fastening nut, four traction springs all wear out outside the back seat.
In the above technical scheme, the sealing ring is arranged on the outer periphery of the end part of the rear seat and positioned on the outer side of the positioning groove.
In the above technical scheme, traction spring subassembly structure still includes the front seat, the front seat is including mutual spring retainer plate linkage segment and the preceding linkage segment as an organic whole, preceding linkage segment and the preceding connecting portion fixed connection of main hose, and the periphery of preceding linkage segment is equipped with medical transparent polyurethane film, spring retainer plate snare dress is in the periphery of spring retainer plate linkage segment and rather than fixed connection.
In the above technical scheme, four spring mounting grooves which are separately arranged are formed in the inner wall of the spring fixing ring and along the axial direction of the spring fixing ring, and one ends of the four traction springs are respectively arranged in the corresponding spring mounting grooves.
In the above technical scheme, the inner hole of the spring retainer plate is provided with the pipe-in-pipe installation channel, and the included angle formed between the first spring installation groove and the second spring installation groove which are positioned at the two sides of the pipe-in-pipe installation channel and the inner hole center line of the spring retainer plate is 98-102 degrees, and the other two spring installation grooves are uniformly distributed on the inner wall of the spring retainer plate at the outer side of the pipe-in-pipe installation channel.
In the above technical scheme, the back seat has the main hose connecting portion and the operating system connecting portion of each other as an organic whole, main hose connecting portion and the back connecting portion fixed connection of main hose, the periphery of operating system connecting portion is equipped with fastening nut and constant head tank.
In the above technical scheme, be equipped with the sealing washer mounting groove on the periphery wall of operating system connecting portion, and the sealing washer mounting groove is located the outside of constant head tank, be equipped with the sealing washer in the sealing washer mounting groove.
In the above technical solution, the total number of the positioning grooves on the outer peripheral wall of the rear connecting seat is a multiple of 4.
In the above technical scheme, the operating system connecting part is provided with a taper hole and a step hole which are coaxially arranged, and the step hole is positioned at the inner side of the taper hole.
In the technical proposal, the middle part of the main hose is divided into five sections along the length thereof, the pitch of the pitch P 11 of the outer spiral spring pipe of the first section is 3 mm-3.9 mm, the pitch of the pitch P 12 of the outer spiral spring pipe of the second section is 3.5 mm-4.1 mm, the pitch of the pitch P 13 of the outer spiral spring pipe of the third section is 3.7 mm-4.4 mm, the pitch of the pitch P 14 of the outer spiral spring pipe of the fourth section is 4.1 mm-4.5 mm, the pitch of the pitch P 15 of the outer spiral spring pipe of the fifth section is 4.3 mm-5.0 mm, and P 11＜P12＜P13＜P14＜P15,
The pitch of the pitch P 21 of the inner spiral spring tube of the first section is 3 mm-3.9 mm, the pitch of the pitch P 22 of the inner spiral spring tube of the second section is 3.5 mm-4.1 mm, the pitch of the pitch P 23 of the inner spiral spring tube of the third section is 3.7 mm-4.4 mm, the pitch of the pitch P 24 of the inner spiral spring tube of the fourth section is 4.1 mm-4.5 mm, the pitch of the pitch P 25 of the inner spiral spring tube of the fifth section is 4.3 mm-5.0 mm, and P 21＜P22＜P23＜P24＜P25,
The Shore hardness A 1 of the medical polyurethane coating of the first section is 31-38, the Shore hardness A 2 of the medical polyurethane coating of the second section is 40-49, the Shore hardness A 3 of the medical polyurethane coating of the third section is 50-58, the Shore hardness A 4 of the medical polyurethane coating of the fourth section is 68-86, the Shore hardness A 5 of the medical polyurethane coating of the fifth section is 89-95, and A 1＜A2＜A3＜A4＜A5,
The outer diameter phi of the woven mesh tube is 11-13 mm, the weaving angle beta of the woven mesh tube is 30-40 degrees, and the pitch H of the crossing points of the woven mesh tube is 2.0-3.8 mm.
The invention has the positive effects that: after the insertion tube assembly of the colonoscope is adopted, the colonoscope also comprises an operating system connecting mechanism, wherein the operating system connecting mechanism comprises a rear seat and a fastening nut, the rear seat is fixedly connected with a rear connecting part of a main hose, the fastening nut is sleeved on the rear seat, a positioning groove is formed in the peripheral wall of the rear connecting seat and positioned at the outer side of the fastening nut, and four traction springs penetrate out of the rear seat;
During the use, with the operation portion connecting cylinder and the back seat connection of operating component, rotatory earlier radial screw on the operation portion connecting cylinder makes it screw in the constant head tank on the back seat, screws up fastening nut again for the operation portion connecting cylinder is tight as an organic whole with the back seat, can prevent effectively like this that the back seat from appearing not hard up with the junction of operation portion connecting cylinder, and the operation portion connecting cylinder can not appear controlling pivoted phenomenon, ensures the reliability of both connections, and then has realized that the bending component can not appear the skew at the crooked in-process, improves colonoscope male accuracy, has reduced the misery of testee.
Drawings
FIG. 1 is a schematic diagram of the structure of an embodiment of the present invention;
FIG. 2 is a schematic illustration of the structural connection of the main hose to the traction spring assembly of the present invention;
FIG. 3 is a schematic view of the connection of the main hose to the operating system connection mechanism of the present invention;
FIG. 4 is a schematic view of the front seat of the present invention;
FIG. 5 is a schematic view of the structure of the backseat of the invention;
FIG. 6 is a left side schematic view of the spring retainer ring of the present invention;
FIG. 7 is a schematic view of the construction of the main hose of the present invention;
fig. 8 is a schematic view of the structure of the woven mesh tube of fig. 7;
fig. 9 is a schematic structural view of the connection between the rear seat and the operation part connecting cylinder of the operation system.
Detailed Description
The invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.
As shown in fig. 1,2, 3, 4, 5, 6, 7, 8, 9, an insertion tube assembly for a colonoscope, comprising:
the main hose 1 comprises an outer spiral spring tube 11, an inner spiral spring tube 12 and a woven mesh tube 13, wherein the inner spiral spring tube 12 is arranged in the outer spiral spring tube 11, the woven mesh tube 13 is sleeved on the periphery of the outer spiral spring tube 11, the main hose 1 comprises a front connecting part, a middle part and a rear connecting part, the outer spiral spring tube 11, the inner spiral spring tube 12 and the woven mesh tube 13 of the front connecting part and the rear connecting part are all welded into a whole, a medical polyurethane coating 14 is arranged on the periphery of the woven mesh tube 13 of the middle part, and a medical transparent polyurethane film 15 is arranged on the periphery of the medical polyurethane coating 14;
a traction spring assembly structure 2, the traction spring assembly structure 2 comprises a spring fixing ring 21 and four traction springs 22, the spring fixing ring 21 is arranged at the front connecting part of the main hose 1, one ends of the four traction springs 22 are arranged on the spring fixing ring 21, and the four traction springs 22 are inserted into the inner spiral spring tube 12,
Still include operating system coupling mechanism 3, operating system coupling mechanism 3 includes back seat 31 and fastening nut 32, back seat 31 and the back connecting portion fixed connection of main hose 1, fastening nut 32 suit is on back seat 31, be equipped with constant head tank 311 on the periphery wall of back seat 31 and lie in the outside of fastening nut 32, four traction springs 22 are all worn out outside the back seat 31.
The external diameter size of the colonoscope is controlled within the range of phi 9 mm-phi 13.5mm, and can be divided into long, medium and short three types according to the length of the colonoscope. The long scope, also known as a full length colonoscope, is 1850mm (1550 mm-1950 mm) and can pass through the ileocecum to the terminal ileum. The long and medium enteroscope is 1350mm (900 mm-1450 mm) and can be inserted into the transverse colon and sometimes enter the ileocecal part. The short mirror is 850mm (600 mm-950 mm) and can be inserted into descending colon or colon spleen curvature.
The main hose 1 of the present invention includes an outer coil spring tube 11 and an inner coil spring tube 12, the spiral directions of the outer coil spring tube 11 and the inner coil spring tube 12 are opposite, the inner coil spring tube 12 is a left-handed spring, the outer coil spring tube 11 is a right-handed spring, the outer coil spring tube 12 may be a right-handed spring, the outer surface of the medical polyurethane coating 14 is provided with a length marking line and a length marking size, and the medical transparent polyurethane film 15 is used for protecting the marking coating.
The insertion tube of the colonoscope is inserted from the anus of the human body and passes through the intestinal lumens such as rectum. The contractile pressure of the human anorectum is very large, between about 20Kpa and 28 Kpa. The reason why the main hose 1 includes the inner and outer coil spring tubes is that: firstly, the detected anorectal contraction and pressure are larger; secondly, the operation of insertion pushing or extraction is needed to be carried out when the insertion tube of the endoscope is used for examination and diagnosis in the intestinal tract, and the insertion tube is required to be twisted at a proper angle to the inner rotating position of the intestinal tract, and the insertion tube is easy to twist or deform due to the large pressure in the inner cavity of the anorectal tract. Therefore, the main hose is designed into an inner spring tube structure and an outer spring tube structure (namely double-layer spring tubes), so that the insertion tube of the colonoscope has certain compression resistance and deformation resistance, the related technical requirements of the insertion anorectal diagnosis are met, and the phenomena of deformation, torsion and the like can not occur in the use process.
Because the existing colonoscope belongs to a semi-sealing medical endoscope, the structure behind the rear connecting part of the insertion tube assembly has no sealing requirement, and the unsealed structure part cannot enter a disinfectant for disinfection and sterilization, so that a complete endoscope only has the front part and the rear structure cannot be disinfected, the cross infection problem is easy to occur, and in order to overcome the defect, as shown in fig. 3 and 5, the periphery of the end part of the rear seat 31 is provided with a sealing ring 33 which is positioned outside the positioning groove 311. The seal ring 33 according to the present invention may be an annular seal ring having a circular cross section or an annular seal ring having a rectangular cross section. When the medical endoscope is used, the rear connecting seat 31 is in sealing connection with the operation part connecting cylinder of the operation system through the sealing ring, so that the rear connecting part of the insertion tube assembly is of a sealing structure, and can be completely soaked in disinfectant for sterilization and disinfection, on one hand, the cross infection problem of the medical endoscope can be effectively prevented, on the other hand, external liquid, water vapor or the like can be effectively prevented from entering the endoscope, the ageing of internal electrical components is prevented, and the service life of medical equipment is prolonged.
As shown in fig. 1,2 and 4, for convenience, the front connecting portion of the main hose and the spring fixing ring are fixedly connected, the traction spring assembly structure 2 further comprises a front seat 23, the front seat 23 comprises a spring fixing ring connecting section 231 and a front connecting section 232 which are integrated with each other, the front connecting section 232 is fixedly connected with the front connecting portion of the main hose 1, a medical transparent polyurethane film 15 is arranged on the periphery of the front connecting section 232, and the spring fixing ring 21 is fixedly connected with the spring fixing ring connecting section 231.
In the prior art, four traction springs are directly welded on the hole wall of an inner hole of a spring fixing ring, and the four traction springs have the following defects: firstly, because the aperture of spring retainer plate hole is little for the welding difficulty, not only takes time and labor, and inefficiency moreover, the second, four springs are crooked easily after welding, exist promptly with the central axis nonparallel problem, have crooked in case traction spring welded fastening takes place for one, occupy the spatial position in the aperture, will influence the assembly of the relevant part of former design device in inserting the tube hole. For example, the "forceps channel tube" is not inserted into the "quadrant 3" hole of the insertion tube, because the conventional medical flexible endoscope has the "forceps channel tube (the channel for biopsy forceps, cytobrush and other instruments)", and the diameter of the forceps channel tube is thicker, (mainly installed in quadrant 3); secondly, when the skew of the traction spring tube is welded and fixed, the error of form and position tolerance of different axial lines is larger when the axial lines of the skew spring tube and the axial lines of the traction steel wire rope are welded, and when the endoscope operates the bent angle traction steel wire rope, the friction force between the skew spring hole and the steel wire rope is large, so that the product quality problem of the steel wire rope is easy to wear or abrade. Thirdly, welding quality and reliability cannot be ensured due to welding in the small holes.
In order to overcome the above-mentioned drawbacks, as shown in fig. 6, four spring mounting grooves 211 are provided on the inner wall of the spring retainer 21 and are spaced apart along the axial direction thereof, and one ends of the four traction springs 22 are respectively provided in the corresponding spring mounting grooves 211. The spring retainer 21 comprises a traction spring fixing section and a front seat connecting section which are integrated with each other, four spring mounting grooves 211 which are separately arranged are formed in the inner wall of the traction spring fixing section along the axial direction of the traction spring fixing section, the front seat connecting section is sleeved on the periphery of the spring retainer connecting section 231, and the periphery of the front seat connecting section is provided with a medical transparent polyurethane film 15. Because the four springs 22 are respectively welded in the spring mounting grooves on the inner wall of the spring fixing ring 21, the invention is convenient for welding, saves time and labor, improves the assembly efficiency, and can ensure that the springs are not inclined after being welded by positioning welding, and ensures the welding quality and reliability.
As shown in fig. 6, the inner hole of the spring retainer 21 has a pipe-clamping channel 212, and the first spring installation groove 2111 and the second spring installation groove 2112 located at two sides of the pipe-clamping channel 212 form an angle of 98 ° to 102 ° with the center line of the inner hole of the spring retainer 21, and the other two spring installation grooves 211 are uniformly distributed on the inner wall of the spring retainer 21 outside the pipe-clamping channel 212, that is, the other two springs are respectively fixed in the spring grooves at the 90 ° position of the cross center line. As can be seen from the figure, the first spring installation groove 2111 and the second spring installation groove 2112 for installing two traction springs are respectively offset from the horizontal direction or the vertical direction by an angle of 4 ° to 6 °, and the space of the third quadrant is increased for the large forceps tube, because the smaller the insertion tube inserted into the human body is, the better. But is too thin and too small, the cable of the camera and the thicker forceps tube needed to access the surgical instrument are not inserted, so the 3 rd quadrant position in the existing bore is increased by offsetting the angle of the spring weld position.
As shown in fig. 5 and 9, in order to make the structure of the present invention more reasonable, the rear socket 31 has a main hose connection portion 312 and an operating system connection portion 313 that are integrated with each other, the main hose connection portion 312 is fixedly connected with the rear connection portion of the main hose 1, and a fastening nut 32 and a positioning groove 311 are provided on the outer periphery of the operating system connection portion 313. When in use, the operation part connecting cylinder of the operation system is sleeved on the periphery of the operation system connecting part 313 of the rear seat 31 and is tightly fixed into a whole through a taper end screw, and the end part of the taper end screw is locked in the positioning groove 311.
As shown in fig. 9, the end of the rear seat of the insertion tube assembly is threaded through the operation portion connecting cylinder hole leftward, and is screwed onto the end surface of the operation portion connecting cylinder 4 with a fastening nut. In order to ensure that the insertion tube assembly does not rotate, the invention also provides for the use of standard small screw holes in the operating portion connecting barrel 4 for the installation of tapered end set screws 5. The position of the operation portion connecting tube 4 where the standard small screw hole is designed is a position on the operation portion, i.e., on the upright center line of the endoscope (instrument). The cone end set screw 5 is screwed into the positioning groove of the rear seat 31, and the positioning groove is positioned on the axis right in the middle of the printed mark on the upper surface of the insertion tube assembly, and is consistent with the axis of a traction spring at the upper part of the front end welding of the insertion tube. Therefore, the positioning groove with multiple of 4 is just in line with the position of the XY cross center line of the section of the insertion tube, and can be assembled with the cross center line of the parts in front of or behind the insertion tube to a consistent position, so that the insertion tube can not rotate left and right, and after the endoscope is inserted into the inner cavity of a human body, a doctor can judge from the marked position on the insertion tube which does not enter the outside of the human body, and enters the state of the right position or the inclined angle of the camera (with the horizontal plane) at the front part of the insertion tube of the human body, and the doctor can better judge the condition of the checked diagnosis position.
As shown in fig. 5, in order to further improve the rationality of the present invention, a seal ring mounting groove 314 is provided on the outer peripheral wall of the operating system connecting portion 313, the seal ring mounting groove 314 is located outside the positioning groove 311, and a seal ring 33 is provided in the seal ring mounting groove 314. In order to make the invention and the operation part connecting tube of the operation system form a sealing connection structure, cross infection is prevented.
In order to prevent the bending assembly from being deviated during the rotation in the four directions, the total number of the positioning grooves 311 on the outer circumferential wall of the rear connecting seat 31 is a multiple of 4, and are uniformly distributed on the outer circumferential wall of the rear connecting seat 31. The positioning groove 311 is a triangular tooth groove or a rectangular tooth groove. The number of the positioning grooves can be 32, 28, 24 or 20, etc. The design has the advantages that: first, the four-direction bending angle of the bending part in front of the endoscope is the bending angle in four directions of the XY axes which are mutually perpendicular, the number of the positioning grooves on the periphery of the rear seat is a multiple of 4, and the 4 grooves which are mutually perpendicular are exactly consistent with the four directions of the bending angle of the bending part in the same way in the four directions of the XY axes. When the bending part assembly is assembled, when any one of the bending angles in four directions is used as the positive upward bending angle of an endoscope product, the positioning screw is screwed, the screw is positioned in any one of the 4 equally divided grooves, and the direction of the bending part bending angle accords with the position of the positive vertical direction of the endoscope product, so that the multiple of 4 equally divided grooves is needed. Secondly, after the colonoscope is inserted into the inner cavity of the checked person by a doctor, the position of the shot image is determined by a positive-position camera at the front end, an upward bending angle of a front bending part of the endoscope is adopted (when an operation part of the endoscope is vertical to a horizontal plane, the front end is bent upwards when the operation part is bent upwards), the colonoscope is bent in four directions through a cross center line of a bending part in front of an insertion tube, length marks are correspondingly printed on the cross center line of the four-direction bending angle, and a positioning groove which corresponds to the periphery of a rear seat is designed on the cross center line of the insertion tube, wherein the length marks are correspondingly printed on the cross center line of the insertion tube. Although the doctor cannot see the angle or position of the camera of the endoscope in the human body cavity, judgment is performed by the marks (a positioning groove on the rear seat corresponds to the axial center line printed with the marks) printed on the insertion tube of the upward and forward operation part at the rear part of the insertion tube outside the human body. The method is used for judging the azimuth or the direction of the detected surface of the human body cavity. The physician can quickly proceed to the site where diagnosis is desired or to the site of biopsy.
As shown in fig. 5, the taper hole has the advantages that: when the traction spring tube is fixed with the operation part of the rear part, the spring tube is convenient to connect with the related structure of the operation part after a small angle is needed to be outwards, so the traction spring tube is designed into a conical hole. The advantage of the design of the step hole 3132 is that when the woven mesh tube at one end of the hose assembly is assembled with the hole of the step hole 3132, the woven mesh tube can be connected by soldering or structural adhesive bonding, the operating system connecting portion 313 has the taper hole 3131 and the step hole 3132 which are coaxially arranged, and the step hole 3132 is located at the inner side of the taper hole 3131.
The traditional double operation method needs to be completed by 2 persons, the operator needs to indicate the advance and retreat of the mirror and the rotation of the mirror to the assistant at the moment, the cooperation of the advance and retreat of the mirror of the assistant in the 2 persons operation is difficult to completely reach the position where the operator needs to diagnose or the position of the biopsy, the intestinal canal is in a constantly peristaltic state at the moment, the cooperation is required to be implied, the operator cannot experience the hand feeling of the assistant and the mirror, the difficulty of operation and diagnosis is increased, the examination time is longer, or the pain of the examined person is sometimes increased.
In order to overcome the defects, as shown in fig. 7 and 8, the invention designs a five-section main hose structure with different hardness, which has better softness and better insertion performance for being inserted into a human body in clinic, and further relieves the pain of the examination, the middle part of the main hose 1 is divided into five sections along the length thereof, the pitch P 11 of the outer coil spring tube 11 of the first section is 3 mm-3.9 mm, the pitch P 12 of the outer coil spring tube 11 of the second section is 3.5 mm-4.1 mm, the pitch P 13 of the outer coil spring tube 11 of the third section is 3.7 mm-4.4 mm, the pitch P 14 of the outer coil spring tube 11 of the fourth section is 4.1 mm-4.5 mm, the pitch P 15 of the outer coil spring tube 11 of the fifth section is 4.3 mm-5.0 mm, and P 11＜P12＜P13＜P14＜P15,
The pitch P 21 of the inner coil spring tube 12 of the first stage is 3mm to 3.9mm, the pitch P 22 of the inner coil spring tube 12 of the second stage is 3.5mm to 4.1mm, the pitch P 23 of the inner coil spring tube 12 of the third stage is 3.7mm to 4.4mm, the pitch P 24 of the inner coil spring tube 12 of the fourth stage is 4.1mm to 4.5mm, the pitch P 25 of the inner coil spring tube 12 of the fifth stage is 4.3mm to 5.0mm, and P 21＜P22＜P23＜P24＜P25,
The Shore hardness A 1 of the medical polyurethane coating 14 of the first section is 31-38, the Shore hardness A 2 of the medical polyurethane coating 14 of the second section is 40-49, the Shore hardness A 3 of the medical polyurethane coating 14 of the third section is 50-58, the Shore hardness A 4 of the medical polyurethane coating 14 of the fourth section is 68-86, the Shore hardness A 5 of the medical polyurethane coating 14 of the fifth section is 89-95, and A 1＜A2＜A3＜A4＜A5,
The outer diameter phi of the woven mesh tube 13 is 11-13 mm, the weaving angle beta of the woven mesh tube 13 is 30-40 degrees, and the pitch H of the crossing points of the woven mesh tube 13 is 2.0-3.8 mm.
The main hose of the colonoscope of the invention is divided into five sections of reasons of different hardness:
First, because the key to colonoscopy is how to insert an endoscope and make a diagnosis, only the delivery of a colonoscope to the ileocecum or the terminal ileum (the observed diagnosis of the terminal ileum) is effective in diagnosing large bowel disease. Therefore, the design requirements of the insertion lens technology and the insertion tube are very important.
Secondly, the lower digestive tract structure of the human body is wound around a plurality of curves, and at least four curved intestinal tracts are needed to pass through. Insertion of the colonoscope through the rectal-sigmoid junction; then passes through the sigmoid colon-SD bending part; then pass through the spleen bend-transverse colon bend part; then pass through the bent part of liver and colon; the ileum was then inserted through the cecum. The doctor then performs examination and diagnosis on the whole large intestine by performing examination while going back to the mirror.
Therefore, the colonoscope is divided into five sections of insertion pipes with different hardness, so that a doctor can provide a colonoscope with better insertion pipe performance, and the colonoscope is more convenient for the doctor to insert into the human lower digestive tract for diagnosis. The length of the insertion tube reaches 1900mm, and the insertion tube can be processed into the longest one, and can completely meet the requirements of operations of examination and diagnosis of rectum, colon, small intestine and the like and the whole lower digestive tract cavity of human body in terms of softness, insertion performance and the like.
Thus, in clinical diagnosis, the diagnosis and biopsy of the whole intestinal tract are completed by 1 person. The colonoscope is used by 1 person, so that the operator can directly experience the hand feeling of colonoscope insertion, the working quality of examination, diagnosis or biopsy can be obviously improved, the labor cost can be saved, the examination efficiency can be improved, the examination time can be shortened, and the pain of the examined person can be reduced.
The invention is divided into five sections with different hardness, and the following main hose of the colonoscope of specific example 1, example 2 and example 3 can be obtained according to the table 1:
TABLE 1
The screw pitches of each section of the inner spiral spring tube and each section of the outer spiral spring tube are the same, so that the softness of the inner spiral spring tube and the softness of the outer spiral spring tube are consistent, and the sectional hardness of the finally produced insertion tube can meet the requirement.
When the colonoscope is used, the operation part connecting cylinder of the operation component is connected with the rear seat, the radial screw on the operation part connecting cylinder is firstly rotated to be screwed into the positioning groove on the rear seat, and then the fastening nut is screwed, so that the operation part connecting cylinder and the rear seat are tightly fixed into a whole, the looseness of the joint of the rear seat and the operation part connecting cylinder can be effectively prevented, the operation part connecting cylinder cannot rotate left and right, the connection reliability of the operation part connecting cylinder and the rear seat is ensured, the deflection of the bending component in the bending process is further realized, the accuracy of colonoscope insertion is improved, and the pain of a testee is reduced.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (7)
1. An insertion tube assembly for a colonoscope, comprising:
The main hose (1), main hose (1) includes outer coil spring pipe (11), interior coil spring pipe (12) and braided mesh tube (13), interior coil spring pipe (12) are established in outer coil spring pipe (11), braided mesh tube (13) suit is in the periphery of outer coil spring pipe (11), main hose (1) includes preceding connecting portion, intermediate part and back connecting portion, outer coil spring pipe (11), interior coil spring pipe (12) and braided mesh tube (13) of preceding connecting portion all weld as an organic wholely, braided mesh tube (13) periphery of intermediate part is equipped with medical polyurethane coating (14), and the periphery of medical polyurethane coating (14) is equipped with medical transparent polyurethane membrane (15);
Traction spring assembly structure (2), traction spring assembly structure (2) include spring retainer plate (21) and four traction springs (22), preceding connecting portion at main hose (1) is established to spring retainer plate (21), and one end of four traction springs (22) is established on spring retainer plate (21) to in four traction springs (22) all insert spiral spring pipe (12), its characterized in that:
The novel flexible hose is characterized by further comprising an operating system connecting mechanism (3), wherein the operating system connecting mechanism (3) comprises a rear seat (31) and a fastening nut (32), the rear seat (31) is fixedly connected with a rear connecting part of the main flexible hose (1), the fastening nut (32) is sleeved on the rear seat (31), a positioning groove (311) is formed in the peripheral wall of the rear seat (31) and located on the outer side of the fastening nut (32), and four traction springs (22) penetrate out of the rear seat (31);
four spring mounting grooves (211) which are arranged separately are formed in the inner wall of the spring fixing ring (21) along the axial direction of the spring fixing ring, and one ends of the four traction springs (22) are respectively arranged in the corresponding spring mounting grooves (211);
The inner hole of the spring fixing ring (21) is provided with a clamp pipe installation channel (212), an included angle formed between a first spring installation groove (2111) and a second spring installation groove (2112) which are positioned at two sides of the clamp pipe installation channel (212) and the central line of the inner hole of the spring fixing ring (21) is 98-102 degrees, and the other two spring installation grooves (211) are uniformly distributed on the inner wall of the spring fixing ring (21) at the outer side of the clamp pipe installation channel (212);
The middle part of the main hose (1) is divided into five sections along the length thereof, the pitch P 11 of the outer spiral spring tube (11) of the first section is 3 mm-3.9 mm, the pitch P 12 of the outer spiral spring tube (11) of the second section is 3.5 mm-4.1 mm, the pitch P 13 of the outer spiral spring tube (11) of the third section is 3.7 mm-4.4 mm, the pitch P 14 of the outer spiral spring tube (11) of the fourth section is 4.1 mm-4.5 mm, the pitch P 15 of the outer spiral spring tube (11) of the fifth section is 4.3 mm-5.0 mm, and P 11＜P12＜P13＜P14＜P15,
The pitch P 21 of the inner coil spring tube (12) of the first section is 3 mm-3.9 mm, the pitch P 22 of the inner coil spring tube (12) of the second section is 3.5 mm-4.1 mm, the pitch P 23 of the inner coil spring tube (12) of the third section is 3.7 mm-4.4 mm, the pitch P 24 of the inner coil spring tube (12) of the fourth section is 4.1 mm-4.5 mm, the pitch P 25 of the inner coil spring tube (12) of the fifth section is 4.3 mm-5.0 mm, and P 21＜P22＜P23＜P24＜P25,
The Shore hardness A 1 of the medical polyurethane coating (14) of the first section is 31-38, the Shore hardness A 2 of the medical polyurethane coating (14) of the second section is 40-49, the Shore hardness A 3 of the medical polyurethane coating (14) of the third section is 50-58, the Shore hardness A 4 of the medical polyurethane coating (14) of the fourth section is 68-86, the Shore hardness A 5 of the medical polyurethane coating (14) of the fifth section is 89-95, and A 1＜A2＜A3＜A4＜A5,
The outer diameter phi of the woven mesh tube (13) is 11 mm-13 mm, the weaving angle beta of the woven mesh tube (13) is 30-40 degrees, and the crossing point pitch H of the woven mesh tube (13) is 2.0-3.8 mm.
2. The colonoscope insertion tube assembly according to claim 1, wherein: and a sealing ring (33) is arranged on the outer periphery of the end part of the rear seat (31) and positioned on the outer side of the positioning groove (311).
3. The colonoscope insertion tube assembly according to claim 1, wherein: the traction spring assembly structure (2) further comprises a front connecting seat (23), the front connecting seat (23) comprises a spring fixing ring connecting section (231) and a front connecting section (232) which are integrated with each other, the front connecting section (232) is fixedly connected with a front connecting part of the main hose (1), a medical transparent polyurethane film (15) is arranged on the periphery of the front connecting section (232), and the spring fixing ring (21) is sleeved on the periphery of the spring fixing ring connecting section (231) and is fixedly connected with the spring fixing ring connecting section.
4. The colonoscope insertion tube assembly according to claim 1, wherein: the rear seat (31) is provided with a main hose connecting part (312) and an operating system connecting part (313) which are integrated with each other, the main hose connecting part (312) is fixedly connected with the rear connecting part of the main hose (1), and the periphery of the operating system connecting part (313) is provided with a fastening nut (32) and a positioning groove (311).
5. The colonoscope insertion tube assembly according to claim 4, wherein: a sealing ring mounting groove (314) is formed in the peripheral wall of the operating system connecting portion (313), the sealing ring mounting groove (314) is located on the outer side of the positioning groove (311), and a sealing ring (33) is arranged in the sealing ring mounting groove (314).
6. The colonoscope insertion tube assembly according to claim 4, wherein: the total number of the positioning grooves (311) on the outer peripheral wall of the rear seat (31) is a multiple of 4.
7. The colonoscope insertion tube assembly according to claim 4, wherein: the operating system connection portion (313) has a taper hole (3131) and a step hole (3132) arranged coaxially, and the step hole (3132) is located inside the taper hole (3131).
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| CN111035350B (en) * | 2019-12-30 | 2022-06-07 | 常州延顺光电科技有限公司 | Preparation method of snake bone device of endoscope |
| CN112587069B (en) * | 2021-03-02 | 2021-06-29 | 岱川医疗(深圳)有限责任公司 | Insertion tube of endoscope, processing method thereof and endoscope |
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