WO2016035539A1 - 医療用デバイス - Google Patents
医療用デバイス Download PDFInfo
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- WO2016035539A1 WO2016035539A1 PCT/JP2015/073033 JP2015073033W WO2016035539A1 WO 2016035539 A1 WO2016035539 A1 WO 2016035539A1 JP 2015073033 W JP2015073033 W JP 2015073033W WO 2016035539 A1 WO2016035539 A1 WO 2016035539A1
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- Prior art keywords
- lumen
- guide wire
- circular portion
- sheath
- medical device
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
- A61B8/445—Details of catheter construction
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/46—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
- A61B8/461—Displaying means of special interest
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- 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
- A61B1/01—Guiding arrangements therefore
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- 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
Definitions
- the present invention relates to a medical device having an imaging function.
- diagnostic imaging has been performed by inserting a medical device having an imaging function into a blood vessel such as a coronary artery of the heart or a lumen such as a bile duct.
- an intravascular ultrasound diagnostic apparatus IVUS: Intra Vascular Ultra Sound
- an ultrasonic detector probe
- the tube body is formed with an observation portion lumen that rotatably accommodates the probe, and a guide wire lumen into which a guide wire for guiding the diagnostic imaging apparatus to a target position can be inserted.
- a guide wire inserted in advance to the vicinity of the target position in the blood vessel is inserted into the guide wire lumen, and the tube is moved along the guide wire to place the probe at the target position.
- the ultrasonic echo generated is processed by amplification, detection, etc.
- a cross-sectional image of the blood vessel can be drawn based on the intensity of the.
- Patent Document 1 discloses an intravascular ultrasonic diagnostic apparatus in which a first guide wire lumen is provided on the distal side of the probe and a second guide wire lumen is provided on the proximal side of the probe. Are listed.
- a mechanism for moving the probe in the axial direction in the observation unit lumen (a thinning mechanism) is provided and an image is acquired even at a position where the probe is aligned with the second guidewire lumen, the observation unit lumen and the second (2) At the position where the guide wire lumen is provided, the thickness of the tube increases, and image loss due to ultrasonic attenuation may occur at a wide angle.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a medical device capable of acquiring images in a wide range as much as possible.
- a medical device that achieves the above object includes a guide wire lumen into which a guide wire can be inserted and a tube body on which an observation portion lumen into which an observation portion for acquiring image information in vivo is inserted is formed.
- a rotating shaft inserted into the observation portion lumen and rotatable to transmit a mechanical driving force to the observation portion; and the tube body is located on a side away from the guide wire lumen.
- a circular portion having a uniform radius of curvature of the observation portion lumen is formed, and at least part of the side close to the guide wire lumen extends from the center point of the circular portion to the inner surface of the observation portion lumen.
- a non-circular portion having a non-uniform distance and longer than the radius of the circular portion is formed.
- a non-circular portion in which the inner diameter of the observation portion lumen is larger than the circular portion is formed in at least part of the side close to the guide wire lumen.
- the image thickness can be reduced, and image loss due to attenuation of ultrasonic waves, light, etc. can be reduced as much as possible, and images can be acquired in a wide range as much as possible.
- the tube has a support portion having an inner diameter equal to the inner diameter of the circular portion on at least a part on the side close to the guide wire lumen, the observation portion and the rotating shaft rotated by the support portion are provided. It is possible to stably support and obtain a good image.
- the support portion has a curvature equal to the curvature in the circular portion, the rotating observation portion and the rotating shaft can be supported more stably, and a good image can be acquired.
- the thickness of the non-circular portion is formed so as to be constant or thin toward the guide wire lumen side, attenuation of ultrasonic waves, light, etc. can be easily predicted, and the image can be easily corrected. can do.
- the outer surface of the tubular body that forms the outside of the non-circular portion is formed as a flat surface, it is possible to obtain high strength while minimizing the tubular body, and the outer circumferential surface of the tubular body. It is difficult for blood or the like to stay on the surface, and adhesion of thrombus and the like can be suppressed.
- the observation unit lumen needs to be filled with a liquid, but a non-circular portion having a large inner diameter is formed and the volume of the observation unit lumen increases.
- the liquid in the observation unit lumen can be replaced with liquid at a lower pressure.
- FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. It is a perspective view which shows a part of instrument for shape
- the medical device is an ultrasonic catheter 1 that contains an imaging core 4 for ultrasonic diagnosis and is inserted into a living body lumen.
- the ultrasonic catheter 1 is connected to an external driving device 7 that holds the ultrasonic catheter 1 and drives the imaging core 4 and is used mainly for diagnosing the inside of a blood vessel.
- the side to be inserted into the lumen of the living body is referred to as “tip” or “tip side”
- the proximal side for operation is referred to as “base end” or “base end side”.
- the ultrasonic catheter 1 includes a sheath 2 that is inserted into a lumen, an imaging core 4 that transmits and receives ultrasonic waves toward the intraluminal tissue, and the imaging core 4 that penetrates and is located on the proximal side of the sheath 2. And an operation unit 3.
- the sheath 2 includes a sheath distal end portion 21, a sheath main body portion 22 formed on the proximal end side of the sheath distal end portion 21, and a filling liquid inlet / outlet member 23.
- the sheath tip 21 and the sheath body 22 are formed with an imaging core lumen 26 (observation lumen) that communicates with each other.
- the imaging core lumen 26 is a hollow passage formed in the sheath 2.
- the imaging core 4 is disposed in the imaging core lumen 26 so as to be slidable in the axial direction of the sheath 2.
- the imaging core 4 includes a transducer unit 41 for transmitting and receiving ultrasonic waves from the lumen toward the living tissue, and a rotating shaft 42 that attaches the transducer unit 41 to the tip and rotates the transducer unit 41.
- the transducer unit 41 includes an ultrasonic transducer 411 (observation unit) that transmits and receives ultrasonic waves, and a housing 412 that houses the ultrasonic transducer 411.
- a guide wire lumen 211 is formed in the sheath distal end portion 21 as a passage for passing the guide wire 25.
- the guide wire lumen 211 opens at the forefront of the sheath distal end portion 21 and opens near the proximal end portion of the sheath distal end portion 21, that is, near the distal end portion of the sheath main body portion 22.
- the sheath distal end portion 21 has a shape that is long in the direction in which the guide wire lumen 211 and the imaging core lumen 26 are arranged in a cross section orthogonal to the longitudinal direction by forming the guide wire lumen 211 and the imaging core lumen 26. It has become.
- the sheath distal end portion 21 is formed around the imaging core lumen 26 around the imaging core lumen 26 at a portion where both the guide wire lumen 211 and the imaging core lumen 26 are formed side by side.
- a circular portion 261 having a uniform radius of curvature and a constant inner diameter r, and a non-uniform distance from the center point (axial center O2) of the circular portion 261 to the inner surface of the lumen 26 for the imaging core, and the inner diameter r of the circular portion 261 A longer non-circular portion 262 is formed.
- the circular portion 261 is formed on the side away from the guide wire lumen 211 in a cross section orthogonal to the longitudinal direction of the sheath distal end portion 21.
- the non-circular portion 262 is formed on at least a part of the side close to the guide wire lumen 211 in a cross section orthogonal to the longitudinal direction of the sheath distal end portion 21.
- the non-circular portion 262 has a reference plane B passing through the axis O1 of the guide wire lumen 211 and the axis O2 of the imaging core lumen 26 in a cross section orthogonal to the longitudinal direction of the sheath distal end portion 21. It is symmetrically formed on both sides of the sandwich.
- the non-circular portion 262 is located at least partially within a range of 90 degrees from the reference plane B on the side close to the guide wire lumen 211 with the axis O2 of the imaging core lumen 26 as the center.
- the sheath distal end portion 21 is partially provided with a support portion 263 having an inner diameter r equal to the circular portion 261 on at least a part on the side close to the guide wire lumen 211.
- the support portion 263 is located on the reference plane B.
- the inner surface 262A and the outer surface 262B of the non-circular portion 262 constituting a part of the inner peripheral surface and a part of the outer peripheral surface of the sheath distal end portion 21 are formed as flat surfaces.
- the outer surface 262B of the non-circular portion 262 connects the tangent of the outer surface of the sheath tip 21 where the guide wire lumen 211 is formed and the tangent of the outer surface of the portion where the imaging core lumen 26 is formed. Is formed.
- the sheath distal end portion 21 can be made high strength while being made as small as possible.
- a concave portion that accumulates blood vessels or the like is not formed between the portion where the guide wire lumen 211 of the sheath distal end portion 21 is formed and the portion where the imaging core lumen 26 is formed.
- the thickness of the non-circular portion 262 is constant from the imaging core lumen 26 side toward the guide wire lumen 211 side.
- the sheath distal end portion 21 is formed of a material having high ultrasonic permeability.
- the sheath distal end portion 21 is formed of a flexible material, and the material is not particularly limited.
- thermoplastic elastomers such as isoprene-based, fluororubber-based, and chlorinated polyethylene are listed. Use one or a combination of two or more of these (polymer alloy, polymer blend, laminate, etc.). Can do.
- the sheath body 22 is positioned on the proximal side of the sheath distal end, and has an imaging core lumen 26 formed therein.
- the sheath main body 22 is formed of a flexible material, and the material is not particularly limited.
- the sheath main body 22 is formed of the same material as that of the sheath tip 21 described above.
- the sheath distal end portion 21 in which the imaging core lumen 26 and the guide wire lumen 211 are formed side by side can be formed by, for example, extrusion molding or heat fusion.
- an extrusion die 81 for defining the shape of the outer peripheral surface of the sheath distal end portion 21, the first core bar 82, and the second core By using the gold 83, the guide wire lumen 211 and the imaging core lumen 26 can be formed simultaneously.
- the first metal core 82 defines the shape of the guide wire lumen 211
- the second metal core 83 defines the shape of the imaging core lumen 26.
- the first core metal 82 and the second core metal 83 having irregular shapes corresponding to the shapes of the lumen 26 for the imaging core and the lumen 211 for the guide wire are produced. Then, as shown in FIG. 6, the heated and melted material extruded from the extruder is filled around the first core bar 82 and the second core bar 83, and the first core bar 82 and the second core bar 83 are filled by the take-up machine.
- the shape of the outer peripheral surface of the sheath distal end portion 21 is defined by passing the inside of the extrusion die 81 while moving in the axial direction.
- the sheath tip 21 is formed by extracting the first core bar 82 and the second core bar 83 from the cooled and cured material and performing necessary processes such as cutting.
- the core metal is not used.
- the sheath tip 21 can be formed.
- a first tube 85 for forming the guide wire lumen 211 and a second tube for forming the imaging core lumen 26 are formed.
- a tube 86 is prepared.
- irregularly shaped first and second metal cores 82 and 83 corresponding to the shapes of the imaging core lumen 26 and the guide wire lumen 211 are produced.
- the first tube 85 having the first core metal 82 inserted therein and the second tube 86 having the second core metal 83 inserted therein are inserted into one heat shrinkable tube 84.
- the first tube 85 and the second tube 86 softened by heating are pressed and integrated with each other by the contraction force of the heat contraction tube 84 contracted by heating.
- the heat-shrinkable tube 84 is peeled off from the cooled and cured material, the first core bar 82 and the second core bar 83 are pulled out, and necessary steps such as cutting are performed, whereby the sheath tip 21 is formed. .
- the filling fluid inlet / outlet member 23 communicates with the imaging core lumen 26 in the sheath 2 and is a priming that is a hole for allowing the physiological saline solution filled in the sheath 2 to flow outside.
- a port 231 is formed.
- the rotating shaft 42 is flexible and has a characteristic that the rotational power generated in the operation unit 3 (see FIG. 1) can be transmitted to the vibrator unit 41.
- the right and left and the winding direction are alternately 3 It is composed of a multilayer coil-like tube body such as a layer coil.
- the transducer unit 41 rotates and the affected part in the lumen such as a blood vessel and a blood vessel can be observed in the circumferential direction.
- the rotating shaft 42 has a signal line 54 for transmitting a signal detected by the vibrator unit 41 to the operation unit 3.
- the operation unit 3 includes a hub 31 having a port 311 for injecting a physiological saline solution for bleeding air, a unit connector 37 connected to the hub 31 via an inner tube 34, and an outer tube.
- the relay connector 33 is connected to the unit connector 37 via the connector 32 and connects the sheath 2 and the operation unit 3.
- the hub 31 holds the rotating shaft 42 and the inner tube 34.
- the rotary shaft 42 is slid in the sheath 2 in the axial direction in conjunction with it.
- the transducer unit 41 is located near the tip of the sheath 2.
- the stopper 313 formed at the tip of the inner tube 34 is caught by the inner wall of the unit connector 37, and the portions other than the vicinity of the caught tip are exposed.
- the transducer unit 41 is pulled back while leaving the sheath 2. By moving the transducer unit 41 while rotating, a tomographic image of a blood vessel or the like can be created.
- the hub 31 of the operation unit 3 includes a joint 50, a male connector 51, a rotor 52, a connection pipe 53, a signal line 54, a hub body 55, a seal member 56, and kink resistance. And a protector 57.
- the joint 50 has an opening 501 on the user's hand side of the ultrasonic catheter 1, and the male connector 51 and the rotor 52 are disposed inside.
- the male connector 51 can be connected to the female connector 711 (see FIG. 2) of the external drive device 7 from the opening 501 side of the joint 50, whereby the external drive device 7 and the male connector 51 are mechanically and electrically connected. Connected.
- the rotor 52 holds the connection pipe 53 so as not to rotate, and rotates integrally with the male connector 51.
- the connection pipe 53 holds the rotating shaft 42 at the end opposite to the rotor 52 side in order to transmit the rotation of the rotor 52 to the rotating shaft 42.
- a signal line 54 is passed through the connection pipe 53.
- One end of the signal line 54 is connected to the male connector 51, and the other end passes through the rotary shaft 42 and is connected to the vibrator unit 41.
- the observation result in the transducer unit 41 is transmitted to the external drive device 7 through the male connector 51, and subjected to appropriate processing and displayed as an image.
- the hub body 55 is injected with physiological saline from the port 311 and introduces the physiological saline into the inner tube 34 without leaking outside.
- the sealing member 56 including the O-ring 58 is installed between the hub main body 55 and the joint 50, the physiological saline does not leak to the opening 501 side of the joint 50.
- the base end portion of the inner tube 34 is inserted into the hub main body 55 so that the outer peripheral surface of the inner tube 34 is fitted to the inner peripheral surface 551 inside.
- a kink protector 57 is disposed around the inner tube 34 and the hub body 55.
- the unit connector 37 includes a unit connector main body 61, a sealing member 62, a cover member 63, and a packing 64 as shown in FIG.
- the unit connector main body 61 is inserted so that the base end portion of the outer tube 32 attached to the relay connector 33 is fitted to the inner peripheral surface 611 inside, and the inner tube member 31 extends from the hub 31 into the outer tube 32.
- Tube 34 is inserted.
- the sealing member 62 is combined with the unit connector main body 61 to hold the packing 64
- the cover member 63 is combined with the unit connector main body 61 to hold the outer tube 32. Since the packing 64 is sealed between the unit connector main body 61 and the sealing member 62, the physiological saline supplied to the port 311 of the hub 31 flows into the outer tube 32 through the inner tube 34. Does not leak out of the unit connector 37.
- the stopper 313 is not a unit. There is no case where the inner tube 34 is pulled out from the unit connector 37 by being caught on the inner wall of the connector main body 61.
- the relay connector 33 includes an outer tube holding portion 65 and a kink protector 66.
- a part of the outer tube 32 is inserted into the outer tube holding portion 65 so that the outer peripheral surface of the distal end portion of the outer tube 32 is fitted to the inner peripheral surface 651 inside.
- the proximal end of the sheath body 22 is connected to the inner peripheral surface 651 of the outer tube holding portion 65, and the rotating shaft 42 and physiological saline that have passed through the outer tube 32 are introduced into the sheath 2.
- a path is formed.
- the sheath body 22 has a single layer structure in FIG. 12, but may have a multilayer structure.
- a spacer tube 68 through which the rotary shaft 42 passes is disposed inside the distal end portion of the outer tube 32 fitted to the outer tube holding portion 65, and a protective tube 67 is fixed to the inner wall of the spacer tube 68.
- the protective tube 67 extends into the inner tube 34 extending from the hub 31 and is disposed between the rotating shaft 42 and the inner tube 34. Therefore, when the inner tube 34 is pushed into the outer tube 32, the protective tube 67 is pushed into the inner tube 34 in the direction opposite to the pushing direction. When the inner tube 34 is pushed into or pulled out from the outer tube 32, the protective tube 67 is also pushed into or pulled out relative to the inner tube 34 from the opposite direction.
- the protective tube 67 is formed of a metal sparsely wound coiled body. For this reason, physiological saline can flow from the gap between the coils, so that air may remain in the outer tube 32. Absent.
- the constituent materials of the outer tube 32, the inner tube 34, the spacer tube 68, the hub 31, the unit connector main body 61 and the outer tube holding portion 65 are not particularly limited.
- the constituent material of these members is suitably selected according to the function requested
- the ultrasonic catheter 1 described above is connected to and driven by an external drive device 7 as shown in FIG.
- the external drive device 7 includes a drive unit 71 that incorporates an external drive source such as a motor on the base 75 and rotationally drives the rotary shaft 42, and a movement that grips the drive unit 71 and moves it in the axial direction by the motor or the like.
- Means 72 and a holding portion 73 for holding a part of the ultrasonic catheter 1 in a fixed position are provided.
- the external drive device 7 is connected to a control unit 79 that controls the drive unit 71 and the moving means 72, and an image obtained by the vibrator unit 41 is displayed on a display unit 78 connected to the control unit 79. .
- the moving means 72 is a feed mechanism capable of gripping and fixing the drive unit 71 and moving the gripped drive unit 71 back and forth along the groove rail 76 on the base 75.
- the drive unit 71 includes a drive female connector 711 to which the drive male connector 51 of the ultrasonic catheter 1 can be connected, and a joint connection unit 712 that can be connected to the joint 50 of the ultrasonic catheter 1.
- the signal can be transmitted to and received from the transducer unit 41, and at the same time, the rotating shaft 42 can be rotated.
- Ultrasonic scanning (scanning) in the ultrasonic catheter 1 transmits the rotational motion of the motor in the drive unit 71 to the rotary shaft 42, and rotates the housing 412 fixed to the tip of the rotary shaft 42, thereby rotating the housing 412. This is performed by scanning an ultrasonic wave transmitted and received by the ultrasonic transducer 411 provided in a substantially radial direction.
- a cross-sectional image of the surrounding tissue body in the axial direction in the blood vessel can be obtained in a scanning manner. Can do.
- a priming operation for filling the ultrasonic catheter 1 with physiological saline is performed before inserting the sheath 2 of the ultrasonic catheter 1 into the lumen.
- a priming operation for filling the ultrasonic catheter 1 with physiological saline is performed.
- ultrasonic waves can be transmitted from the ultrasonic transducer 411, and the air in the ultrasonic catheter 1 is removed to prevent the air from entering a lumen such as a blood vessel.
- the hub 31 is pulled most from the unit connector 37 toward the user, that is, the inner tube 34 is pulled out most from the outer tube 32 (see FIG. 10).
- a physiological saline solution is injected through, for example, a syringe barrel through a tube (not shown) connected to 311 and a device including a three-way cock.
- the injected physiological saline solution is filled into the sheath 2 in order from the hub 31.
- the physiological saline is removed from the priming port 231 formed in the filling liquid inlet / outlet member 23 (see FIG. 3) of the sheath 2. Thereby, filling of the physiological saline is confirmed.
- air in the ultrasonic catheter 1 can be removed and air can be prevented from entering the lumen.
- the sheath distal end portion 21 includes a non-circular portion 262 in which the inner diameter r of the imaging core lumen 26 is large, so that the volume in the imaging core lumen 26 is increased and replaced with physiological saline at a lower pressure. can do.
- the ultrasonic catheter 1 is connected to an external drive device 7 covered with a sterilized polyethylene bag (not shown). That is, the joint 50 (see FIG. 11) of the hub 31 of the ultrasonic catheter 1 is connected to the joint connection portion 712 of the drive unit 71.
- the joint 50 see FIG. 11
- the rotating shaft 42 can be rotated. Then, when the unit connector 37 is fitted into the holding portion 73, the connection is completed.
- the drive unit 71 is moved to the distal end side along the groove rail 76 on the base 75, whereby the hub 31 is pushed to the distal end side, and the inner tube 34 is pushed most into the outer tube 32 (see FIG. 1).
- the guide wire 25 is inserted into the living body lumen so as to reach the vicinity of the target position where the distal end portion is observed.
- the proximal end portion of the guide wire 25 is inserted from the distal end opening portion of the guide wire lumen 211 of the ultrasonic catheter 1, the sheath 2 is moved along the guide wire 25, and the ultrasonic transducer 411 is observed. It arranges on the back side (tip side) from the affected part.
- the affected part while performing the radial scanning of the ultrasonic transducer 411.
- the image of the living tissue including the affected part can be acquired along the axial direction of the lumen by moving it further toward the proximal end side along the axial direction.
- the pull back operation can be performed by operating the moving means 72 connected to the rear end portion of the ultrasonic catheter 1 by the control unit 79.
- the acquired data is digitally processed by the control unit 79 and then displayed on the display unit 78 as image data.
- a non-circular portion 262 is formed at the sheath distal end portion 21 and the thickness of the catheter in the non-circular portion 262 is thin. It can be reduced as much as possible. That is, as in the comparative example shown in FIG. 13, when the inner diameter of the imaging core lumen 27 is constant in all circumferential directions, the thickness is thicker on the side closer to the guidewire lumen 211 of the imaging core lumen 27. A site is generated, and the ultrasonic attenuation in the range C of about 180 degrees closer to the guide wire lumen 211 is increased, and image loss is likely to occur. On the other hand, in the present embodiment, as shown in FIG.
- the non-circular portion 262 whose distance from the axis 2 to the inner surface of the imaging core lumen 27 is longer than the circular portion 261 is formed. Even when the guide wire lumen 211 is formed, the attenuation ⁇ is reduced, and the angle ⁇ at which image loss is likely to occur can be reduced, and a good image can be acquired over a wide range.
- the angle ⁇ is defined by a partition wall between the imaging core lumen 26 and the guide wire lumen 211, and can be set as appropriate depending on the size of the imaging core lumen 26 and the guide wire lumen 211. For example, the angle ⁇ is about 60 degrees. is there.
- sheath distal end portion 21 is partially provided with a support portion 263 having an inner diameter r equal to the circular portion 261 on at least a part on the side close to the guide wire lumen 211. For this reason, it is possible to stably support the rotating ultrasonic transducer 411 (observation unit) and the rotating shaft 42, and a good image can be acquired.
- the thickness of the non-circular portion 262 is constant toward the guide wire lumen 211 side, the attenuation of the ultrasonic wave in the non-circular portion 262 can be easily predicted, and the acquired image can be easily corrected. it can.
- the outer surface 262B constituting the outer side of the non-circular portion 262 is formed as a flat surface on the outer peripheral surface of the sheath 2 (tubular body), high strength can be obtained while making the sheath 2 as small as possible, and the outer periphery. Compared with the case where a recess is formed on the surface, blood or the like is less likely to accumulate, and adhesion of thrombus and the like can be suppressed.
- the present invention is not limited to the above-described embodiment, and various modifications can be made by those skilled in the art within the technical idea of the present invention.
- OCT optical coherence tomography diagnosis apparatus
- OFDI optical frequency domain imaging diagnosis apparatus
- the support portion 265 provided together with the non-circular portion 264 on the side close to the guide wire lumen 211 may have a curvature R2 equal to the curvature R1 of the circular portion 261. .
- the rotating ultrasonic transducer 411 and the rotating shaft 42 can be supported more stably, and a good image can be acquired.
- a plurality of support portions 267 may be provided along with the non-circular portion 266 on the side close to the guide wire lumen 211.
- the inner side surface 268A and the outer side surface 268B of the non-circular portion 268 do not have to be flat.
- the thickness of the non-circular portion 269 may be formed so as to become thinner toward the guide wire lumen 211 side.
- the thickness of the non-circular portion 269 is preferably set so that the length L of the non-circular portion 269 along the radial direction centered on the axis O3 of the imaging core lumen 28 is constant. In this way, the attenuation of the ultrasonic wave and light in the non-circular portion 269 is approximately the same as that of the circular portion 261, and the acquired image can be easily corrected.
- only one guide wire lumen 211 is provided, but it may be divided into two (plural) in the axial direction.
- the guide wire lumen 211 is a rapid exchange type catheter formed only at the distal end portion of the catheter.
- the medical device is a catheter of the catheter. It may be an over-the-wire type catheter in which a guide wire lumen is formed over the entire axial direction.
- Ultrasonic catheter (medical device), 2 sheath (tube), 21 sheath tip, 211 Lumen for guide wire, 22 sheath body, 25 guide wire, 26, 27, 28 Lumen for imaging core (lumen for observation section), 261 circular part, 262, 264, 266, 268, 269 non-circular part, 262A inner surface, 262B outer surface, 263, 265, 267 support, 411 ultrasonic transducer (observation part), 42 rotating shaft, r inner diameter, R1, R2 curvature.
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Abstract
Description
2 シース(管体)、
21 シース先端部、
211 ガイドワイヤ用ルーメン、
22 シース本体部、
25 ガイドワイヤ、
26,27,28 イメージングコア用ルーメン(観察部用ルーメン)、
261 円形部、
262,264,266,268,269 非円形部、
262A 内側面、
262B 外側面、
263,265,267 支持部、
411 超音波振動子(観察部)、
42 回転シャフト、
r 内径、
R1,R2 曲率。
Claims (6)
- ガイドワイヤを挿入可能なガイドワイヤ用ルーメンおよび生体内で画像情報を取得する観察部が挿入される観察部用ルーメンが形成された管体を備える医療用デバイスであって、
前記観察部用ルーメン内に挿入され、前記観察部に機械的駆動力を伝達するために回転可能な回転シャフトを有し、
前記管体は、前記ガイドワイヤ用ルーメンから離れた側に前記観察部用ルーメンの曲率半径が均一の円形部が形成されるとともに、前記ガイドワイヤ用ルーメンに近接する側の少なくとも一部に前記円形部の中心点から前記観察部用ルーメンの内面までの距離が非均一であって前記円形部の半径よりも長い非円形部が形成される医療用デバイス。 - 前記管体は、前記ガイドワイヤ用ルーメンに近接する側の少なくとも一部に、前記円形部の内径と等しい内径の支持部を有する請求項1に記載の医療用デバイス。
- 前記支持部は、前記円形部における曲率と等しい曲率を有する請求項2に記載の医療用デバイス。
- 前記非円形部の肉厚は、前記ガイドワイヤ用ルーメン側に向かって一定または薄くなるように形成される請求項1~3のいずれか1項に記載の医療用デバイス。
- 前記管体の外周面において前記非円形部の外側を構成する面は、平面で形成される請求項1~4のいずれか1項に記載の医療用デバイス。
- 前記観察部は、超音波振動子である請求項1~5のいずれか1項に記載の医療用デバイス。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018047063A (ja) * | 2016-09-21 | 2018-03-29 | テルモ株式会社 | 接続ポートおよび医療用デバイス |
WO2018174256A1 (ja) * | 2017-03-23 | 2018-09-27 | テルモ株式会社 | カテーテル組立体 |
JP2022119950A (ja) * | 2016-10-26 | 2022-08-17 | ケアフュージョン 2200,インコーポレーテッド | 多管腔留置カテーテル |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11864791B2 (en) * | 2020-03-31 | 2024-01-09 | Dib UltraNav Medical LLC | Handle assembly for medical devices |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000197603A (ja) * | 1999-01-06 | 2000-07-18 | Asahi Optical Co Ltd | 内視鏡の先端部 |
JP2008537693A (ja) * | 2005-03-31 | 2008-09-25 | サイティック コーポレーション | 内部生検マーキング |
JP2011045534A (ja) * | 2009-08-27 | 2011-03-10 | Terumo Corp | 挿通補助具およびカテーテル |
WO2013062039A1 (ja) * | 2011-10-27 | 2013-05-02 | オリンパスメディカルシステムズ株式会社 | 超音波観察装置 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5372138A (en) * | 1988-03-21 | 1994-12-13 | Boston Scientific Corporation | Acousting imaging catheters and the like |
DE69127462T2 (de) * | 1990-12-17 | 1998-04-02 | Cardiovascular Imaging Systems, Inc., Sunnyvale, Calif. | Vaskularer katheter mit einem ein niedriges profil aufweisenden distalen ende |
US6290668B1 (en) * | 1998-04-30 | 2001-09-18 | Kenton W. Gregory | Light delivery catheter and methods for the use thereof |
US7329223B1 (en) * | 2001-05-31 | 2008-02-12 | Abbott Cardiovascular Systems Inc. | Catheter with optical fiber sensor |
JP4065167B2 (ja) | 2002-09-05 | 2008-03-19 | テルモ株式会社 | カテーテル |
US20060063973A1 (en) * | 2004-04-21 | 2006-03-23 | Acclarent, Inc. | Methods and apparatus for treating disorders of the ear, nose and throat |
US9889275B2 (en) * | 2006-06-28 | 2018-02-13 | Abbott Laboratories | Expandable introducer sheath to preserve guidewire access |
JP5820271B2 (ja) * | 2008-10-20 | 2015-11-24 | スパイン ビュー, インコーポレイテッド | 脊椎へのアクセスおよび視覚化のための開創器カニューレシステムおよび関連方法 |
US8647281B2 (en) * | 2009-03-31 | 2014-02-11 | Boston Scientific Scimed, Inc. | Systems and methods for making and using an imaging core of an intravascular ultrasound imaging system |
US8876722B2 (en) * | 2009-07-23 | 2014-11-04 | Acist Medical Systems, Inc. | Endoventricular injection catheter system with integrated echocardiographic capabilities |
JP5399301B2 (ja) * | 2010-03-12 | 2014-01-29 | テルモ株式会社 | カテーテル |
JP2012223346A (ja) * | 2011-04-19 | 2012-11-15 | Terumo Corp | カテーテル |
US9492140B2 (en) * | 2012-06-12 | 2016-11-15 | Volcano Corporation | Devices, systems, and methods for forward looking imaging |
US9474882B2 (en) * | 2013-02-26 | 2016-10-25 | Prytime Medical Devices, Inc. | Fluoroscopy-independent balloon guided occlusion catheter and methods |
-
2015
- 2015-08-17 EP EP15837680.6A patent/EP3189786B1/en active Active
- 2015-08-17 WO PCT/JP2015/073033 patent/WO2016035539A1/ja active Application Filing
- 2015-08-17 JP JP2016546402A patent/JP6591987B2/ja active Active
-
2017
- 2017-03-01 US US15/446,841 patent/US11284857B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000197603A (ja) * | 1999-01-06 | 2000-07-18 | Asahi Optical Co Ltd | 内視鏡の先端部 |
JP2008537693A (ja) * | 2005-03-31 | 2008-09-25 | サイティック コーポレーション | 内部生検マーキング |
JP2011045534A (ja) * | 2009-08-27 | 2011-03-10 | Terumo Corp | 挿通補助具およびカテーテル |
WO2013062039A1 (ja) * | 2011-10-27 | 2013-05-02 | オリンパスメディカルシステムズ株式会社 | 超音波観察装置 |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018047063A (ja) * | 2016-09-21 | 2018-03-29 | テルモ株式会社 | 接続ポートおよび医療用デバイス |
JP2022119950A (ja) * | 2016-10-26 | 2022-08-17 | ケアフュージョン 2200,インコーポレーテッド | 多管腔留置カテーテル |
WO2018174256A1 (ja) * | 2017-03-23 | 2018-09-27 | テルモ株式会社 | カテーテル組立体 |
CN109890449A (zh) * | 2017-03-23 | 2019-06-14 | 泰尔茂株式会社 | 导管组装体 |
JPWO2018174256A1 (ja) * | 2017-03-23 | 2020-01-23 | テルモ株式会社 | カテーテル組立体 |
EP3628363A4 (en) * | 2017-03-23 | 2021-05-26 | Terumo Kabushiki Kaisha | CATHETER SET |
JP2022017448A (ja) * | 2017-03-23 | 2022-01-25 | テルモ株式会社 | カテーテル組立体 |
CN109890449B (zh) * | 2017-03-23 | 2022-04-15 | 泰尔茂株式会社 | 导管组装体 |
JP2022160561A (ja) * | 2017-03-23 | 2022-10-19 | テルモ株式会社 | カテーテル組立体 |
JP7309024B2 (ja) | 2017-03-23 | 2023-07-14 | テルモ株式会社 | カテーテル組立体 |
US11806481B2 (en) | 2017-03-23 | 2023-11-07 | Terumo Kabushiki Kaisha | Catheter assembly |
JP7498343B2 (ja) | 2017-03-23 | 2024-06-11 | テルモ株式会社 | カテーテル組立体 |
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EP3189786B1 (en) | 2020-01-29 |
US11284857B2 (en) | 2022-03-29 |
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JP6591987B2 (ja) | 2019-10-16 |
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