WO2005032384A1 - 医療用結紮装置とその装置を利用する生体組織切除用の医療器具とその方法 - Google Patents
医療用結紮装置とその装置を利用する生体組織切除用の医療器具とその方法 Download PDFInfo
- Publication number
- WO2005032384A1 WO2005032384A1 PCT/JP2004/014601 JP2004014601W WO2005032384A1 WO 2005032384 A1 WO2005032384 A1 WO 2005032384A1 JP 2004014601 W JP2004014601 W JP 2004014601W WO 2005032384 A1 WO2005032384 A1 WO 2005032384A1
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- WIPO (PCT)
- Prior art keywords
- snare
- living tissue
- ligated
- wire
- indwelling
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/32056—Surgical snare instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/122—Clamps or clips, e.g. for the umbilical cord
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/128—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips
- A61B17/1285—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320016—Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0487—Suture clamps, clips or locks, e.g. for replacing suture knots; Instruments for applying or removing suture clamps, clips or locks
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00238—Type of minimally invasive operation
- A61B2017/00269—Type of minimally invasive operation endoscopic mucosal resection EMR
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/0034—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means adapted to be inserted through a working channel of an endoscope
Definitions
- the present invention relates to a medical ligating device, which is a medical device that is used by being inserted into a body and indwells a ligation target in the body while being ligated with an indwelling snare, and a medical device for removing a living tissue using the device.
- Equipment and methods are used by being inserted into a body and indwells a ligation target in the body while being ligated with an indwelling snare.
- a treatment instrument into a body through a channel of an endoscope which is inserted into the body in advance to treat a lesion of a living tissue in the body.
- the following technologies have been developed as systems for performing surgical procedures using this type of endoscope. That is, first, a treatment tool is inserted into a body through a channel of an endoscope, and a base portion of a polyp-shaped living tissue formed in the body is strung and ligated with an indwelling snare or a TBAR. After that, the upper part of the polyp-shaped living tissue above the ligated site is excised with an excision treatment tool such as an excision snare.
- This system removes living tissue without inadvertent bleeding or perforation.
- JP-A-10-277046 and JP-A-11-244294 disclose examples of an indwelling snare used as a ligation tool for ligating a root portion of a living tissue.
- the indwelling snare is provided with a snare wire.
- a loop portion for ligating is formed on the tip side of the snare wire so as to be expandable in a loop shape.
- a tubular throttle member is provided on the base end side of the loop portion.
- Two snare wires at both ends of a snare wire forming a loop portion are press-fitted into this throttle member in a bundled state.
- a connecting ring is provided on the base end side of the snare wire.
- the indwelling snare is operated by a snare operating tool.
- the snare operation tool has an elongated insertion portion to be inserted into the body, and a hand-side operation portion connected to a base end of the insertion portion.
- the insertion portion has an outer sheath, an operation tube that is movably inserted in the outer sheath in the axial direction, and an operation wire that is movably inserted in the operation tube in the axial direction.
- a snare connecting portion is provided at the tip of the operation wire.
- a connecting ring is detachably connected to the snare connecting portion.
- the operation unit has an operation tube slider and an operation wire slider. The operation tube slider moves the operation tube in the axial direction.
- the operation wire slider moves the operation wire in the axial direction.
- connection ring of the indwelling snare is connected to the snare connecting portion of the operation wire in advance.
- the operation wire is pulled toward the user, and the entire indwelling snare is set in the outer sheath. Then, the insertion part of the snare operation tool is inserted into the body through the channel of the endoscope.
- an indwelling snare extends outside the outer sheath at a position near the living tissue to be treated.
- the loop portion of the indwelling snare is expanded in a loop shape by the elasticity of the snare wire itself.
- an operation of inserting the living tissue to be ligated into the loop of the snare wire is performed. With the living tissue to be ligated inserted, the operating tube of the snare operating tool is pushed forward.
- the squeezing member is pushed out to the tip end side of the snare wire by the operation tube, so that the squeezing operation is performed in a direction to squeeze the loop portion of the snare wire to ligate the living tissue to be ligated in the loop portion of the snare wire.
- the connecting ring of the indwelling snare is pulled out from the snare connection portion at the tip of the operation wire, and the indwelling snare nail operating tool force is also separated. Furthermore, after the root portion of the polyp-shaped living tissue is ligated by an indwelling snare, the upper portion of the ligated portion is cut off with a resection tool such as a resection snare as needed.
- the position of the resection surface of the living tissue by the resection snare moves to a position immediately above the indwelling snare, so the narrowing of the indwelling snare, the banding position by the snare wire, and the biological thread by the resection snare In some cases, it may not be possible to provide a sufficient margin with the cut surface of the woven fabric.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to prevent a snare wire from digging into a living tissue when ligating a living tissue by an indwelling snare, and to ligate the living tissue by the indwelling snare.
- a medical ligation device and a living tissue resection using the medical ligation device that can reliably perform the resection with a margin when the upper part of the ligation part of the living tissue is resected with a resection instrument. It is to provide medical equipment for medical use and its method.
- the present invention includes an indwelling snare that is inserted and indwelled in a body, and a snare operation tool that operates the indwelling snare, wherein the indwelling snare has a snare wire having a distal end and a proximal end.
- the connection ring provided on the proximal end side of the snare wire and the proximal end side of the snare wire are inserted in a press-fit state.
- a snare operation tool having a distal end and a proximal end, and an elongated insertion portion to be inserted into a body; a snare connecting portion provided at a distal end of the insertion portion; A snare connecting portion having the connecting ring detachably connected thereto, the indwelling snare being connected to the snare connecting portion, and a living tissue to be ligated inserted into a loop portion of the snare wire.
- the squeezing member is pushed to the tip side of the snare wire to squeeze the loop portion of the snare wire to squeeze the loop portion of the snare wire to ligate a ligated object in the loop portion of the snare wire.
- the contact area with the living tissue is provided on at least one of the leading end side and the rear end side of the loop portion of the snare wire, and when the living tissue to be ligated is ligated by the snare wire, the contact area with the living tissue is smaller than the contact area between the snare wire and the living tissue.
- V a medical ligating device comprising a living tissue edible provided with a contact surface, and a means for preventing entanglement.
- the loop portion of the snare wire is ligated when the living tissue to be ligated is ligated by a snare wire.
- Biological tissue diet to be ligated at least one of the distal end and the rear end By making contact with the living tissue to be ligated on the large contact surface by the intrusion prevention means, it is possible to prevent the living tissue to be ligated from digging into at least one of the contact surfaces on the leading end side and the rear end side of the loop portion. .
- the body of the resection instrument such as a resection snare can be positioned.
- a sufficient margin can be provided between the cut surface of the tissue and the loop of the snare wire.
- the living tissue intrusion prevention means has a non-slip means on the contact surface with the living tissue to be ligated.
- the living tissue to be ligated is prevented from slipping from the contact surface with the digging prevention means by the slip preventing means of the living tissue digging prevention means.
- the living tissue diet and the prevention means are provided before and after a loop portion of the snare wire, respectively.
- the living tissue to be ligated is ligated by the snare wire
- the living tissue to be ligated is brought into contact with the living tissue to be ligated on the large contact surface by the living tissue digging prevention means before and after the loop portion of the snare wire, so that the contact surface before and after the loop portion is formed. This prevents the living tissue to be ligated from digging into the body.
- the body tissue by the resection instrument such as a resection snare can be used. A sufficient margin can be provided between the cut surface of the snare wire and the loop portion of the snare wire.
- the living tissue digging prevention means is configured to cut the upper side of the ligated part at the base side of the living tissue to be ligated ligated by the indwelling snare, A cutting margin setting section for setting a predetermined cutting margin between the ligature and the ligated part.
- the cut-off margin setting unit of the biological tissue digging prevention means cuts the upper cut surface of the ligated site.
- a predetermined cutting margin is set between the ligation site It is.
- the living tissue eating and feeding preventing means is formed by a clip member attached to the ligating portion of the living tissue after the loop portion is squeezed by the squeezing member to ligate the living tissue. Te ru.
- the loop portion of the snare wire is squeezed by the squeezing member to ligate the living tissue, and a clip member separate from the squeezing member is attached to the ligating portion of the living tissue.
- a resection tool such as a resection snare by the clip member of the bite prevention means on the upper part of the ligation part of the living tissue ligated by the indwelling snare, the resection procedure of the resection snare or the like is performed.
- a sufficient margin can be provided between the cut surface of the living tissue by the tool and the loop portion of the snare wire.
- the present invention provides a ligation chair in which at least an endoscope insertion channel and a ligation treatment tool for inserting a ligation tool for ligation of a living tissue are inserted into an insertion portion inserted into a body lumen. And a resection channel into which a resection tool for resection of a ligated portion of the living tissue ligated by the ligature is inserted, and is disposed at a distal end portion of the insertion portion.
- a treatment insertion assisting tool including a treatment space, a ligation treatment tool inserted into the ligation channel, and set at a position surrounding a periphery of the opening, and the endoscope The working space through the mirror insertion channel Endoscope inserted into the endoscope, and a grasping treatment tool provided with a grasping portion for grasping a living tissue at a distal end of the insertion portion inserted into the working space through the channel of the endoscope.
- a tissue pulling means for pulling up the living tissue to be ligated through the opening by bending the endoscope while holding the living tissue by the gripping portion of the gripping treatment tool; and
- the ligation means for ligating the living tissue to be ligated by the means for ligation by the ligation instrument, and the ligation part of the living tissue inserted through the resection channel and ligated by the ligation means is excised.
- a shape of the opening of the treatment insertion assisting tool A medical instrument for resection of living tissue, wherein the length in a direction perpendicular to the axial direction is set shorter than the length in the axial direction of the insertion aid for placement.
- the present invention provides an insertion step of inserting the indwelling snare into a body in a state where the indwelling snare is detachably connected to the snare connecting portion of the snare operating tool, and ligating the indwelling snare into a loop of a snare wire of the indwelling snare.
- the cutting instrument is moved by using the squeezing member for squeezing the loop portion of the snare wire as a guide, and a predetermined cut is made between the resection surface above the ligation site and the ligation site.
- a resection method of the biological tissue characterized by comprising a biological tissue ablation step of excising the upper portion
- FIG. 1 is a perspective view showing the appearance of the entire medical ligating apparatus according to the first embodiment of the present invention.
- FIG. 2A is a perspective view showing an indwelling snare of the medical ligation apparatus according to the first embodiment.
- FIG. 2B is a perspective view showing a distal end portion of the snare operation tool.
- FIG. 2C is a perspective view showing an operation unit on a hand side of the snare operation tool.
- FIG. 3 is a longitudinal sectional view of a main part showing a state in which an indwelling snare is connected to a snare operating tool of the medical ligation apparatus according to the first embodiment.
- FIG. 4 is a perspective view of a main part showing a state where a living tissue is inserted into an indwelling snare of the medical ligating apparatus according to the first embodiment.
- FIG. 5 is a perspective view of a main part showing a state in which a living tissue is ligated by an indwelling snare of the medical ligation apparatus according to the first embodiment and is left in a body.
- FIG. 6A is a side view of a main part showing a ligated part of a living tissue by an indwelling snare according to the first embodiment.
- FIG. 6B is a sectional view taken along the line VIB-VIB in FIG. 6A.
- FIG. 7 is an explanatory view for explaining an operation of cutting the upper part of the ligated portion of the living tissue by the indwelling snare according to the first embodiment with a cutting snare.
- FIG. 8 is an explanatory diagram for explaining a state in which the upper part of the ligated portion of the living tissue by the indwelling snare according to the first embodiment has been cut off by a cutting snare.
- FIG. 9 is a longitudinal sectional view of a main part of an indwelling snare showing a second embodiment of the present invention.
- FIG. 10 is a longitudinal sectional view of a main part of an indwelling snare showing a third embodiment of the present invention.
- FIG. 11 is a longitudinal sectional view of a main part of an indwelling snare showing a fourth embodiment of the present invention.
- FIG. 12 is a longitudinal sectional view of a main part of an indwelling snare showing a fifth embodiment of the present invention.
- FIG. 13A is a longitudinal sectional view of a main part showing a state where an indwelling snare according to a sixth embodiment of the present invention is accommodated in an outer case of a snare operating tool.
- FIG. 13B is a longitudinal sectional view of a main part showing a state where the indwelling snare is projected outside the outer sheath of the snare operation tool.
- FIG. 14 is a longitudinal sectional view of a main part showing a medical ligating apparatus according to a seventh embodiment of the present invention.
- FIG. 15A is a perspective view of a main part showing a state where a living tissue is passed through an indwelling snare of a medical ligation apparatus according to a seventh embodiment.
- FIG. 15B is a perspective view of a main part showing a state where a living tissue is ligated by an indwelling snare.
- FIG. 15C is a perspective view of a main part showing a state where a clip member is attached to a ligated part of a living tissue by an indwelling snare.
- FIG. 16 is a perspective view showing a schematic configuration of an entire system of a medical ligating apparatus according to an eighth embodiment of the present invention.
- FIG. 17 is a perspective view of a main part of a medical ligating device according to an eighth embodiment.
- FIG. 18 is a longitudinal sectional view of a main part showing a connecting member of a medical ligating apparatus according to an eighth embodiment.
- FIG. 19 is a perspective view showing a schematic configuration of an entire medical instrument system for full thickness colon resection according to a ninth embodiment of the present invention.
- FIG. 20A is a plan view showing a distal end portion of a treatment insertion aid of the medical device system according to the ninth embodiment.
- FIG. 20B is a sectional view taken along the line 20B-20B in FIG. 20A.
- FIG. 21 is a longitudinal sectional view of a main part showing a state where a living tissue is pulled up from a treatment side hole into a working space by a medical instrument system according to a ninth embodiment.
- FIG. 22 is a longitudinal sectional view of a main part showing a state where a living tissue pulled up by the medical instrument system according to the ninth embodiment is ligated by a ligation snare and a resection snare.
- FIG. 23 is a longitudinal sectional view of a main part showing a state where a living tissue pulled up by a medical device system according to a ninth embodiment has been cut by a cutting snare.
- FIG. 24A is a diagram showing a resected portion of a large intestine resected by the medical instrument system according to the ninth embodiment.
- FIG. 24B is a view showing a state where a resected portion of the large intestine is ligated with an indwelling snare.
- FIG. 25A is a perspective view showing an indwelling snare according to a tenth embodiment of the present invention.
- FIG. 25B is a longitudinal sectional view of a main part showing a state where the living tissue is ligated by an indwelling snare.
- FIG. 26A is a longitudinal sectional view showing a distal end portion of a treatment insertion assisting tool of a medical instrument system according to an eleventh embodiment of the present invention.
- FIG. 26B is a sectional view taken along line 26B-26B in FIG. 26A.
- FIG. 26C is a longitudinal sectional view of a substantial part showing a state where the living tissue pulled up by the medical instrument system is ligated by a ligation tool.
- FIG. 26D is a longitudinal sectional view of a main part showing a state where the living tissue pulled up by the medical instrument system has been cut off by a cutting snare.
- FIG. 1 shows the overall appearance of the medical ligation device 1 of the present embodiment.
- the medical ligating apparatus 1 has an indwelling snare 2 that is a ligating tool, and a snare operating tool 3 that operates the indwelling snare 2.
- FIG. 2A shows an indwelling snare 2 of the present embodiment.
- the indwelling snare 2 includes a snare wire 5 in which a ligating loop portion 4 whose tip side can be expanded in a loop shape is formed, a connection ring 6 provided at a base end of the snare wire 5, and a snare wire 5. It has a ring-shaped throttle member 7 into which two wire portions (wire wires 5b, 5c) near the end on the side of the connection ring 6 are inserted in a press-fit state.
- the snare wire 5 is formed of, for example, a biocompatible synthetic resin material.
- the indwelling snare 2 has a loop portion 4 formed by, for example, bending a snare wire 5 into a loop. Then, a bent portion 5a of the snare wire 5 is arranged on the tip side of the loop portion 4.
- the two wire wires 5b and 5c of the snare wire 5 formed by bending at the bending portion 5a extend to the base end side of the loop portion 4.
- the two wire wires 5b and 5c extending to the base end side of the loop portion 4 are press-fit into the throttle member 7 in a bundled state.
- a connecting ring 6 is disposed at the extended ends of the two wire wires 5b and 5c extending behind the throttle member 7.
- the snare operation tool 3 has an elongated insertion portion 10 and an operation portion 11 on the hand side.
- the operation unit 11 is connected to a base end of the insertion unit 10.
- the insertion section 10 is inserted into the body through the channel 9 of the endoscope 8.
- FIG. 4 shows a state in which the insertion portion 10 of the snare operation tool 3 is inserted into the body through the channel 9 of the endoscope 8.
- the insertion section 10 has an outer sheath 12, an operation tube 13, and an operation wire 14.
- the operation tube 13 is inserted inside the outer sheath 12 movably in the axial direction.
- the operation wire 14 is inserted inside the operation tube 13 so as to be movable in the axial direction.
- a proximal end of a hook member (snare connecting portion) 15 is connected and fixed to a distal end of the operation wire 14.
- the tip of the hook member 15 has a hook-like hook 15a.
- the hook 15a protrudes in a direction substantially orthogonal to the axial direction of the operation wire 14. This hook 15a
- the connection ring 6 of the indwelling snare 2 is adapted to be removably engaged.
- the operation unit 11 has an operation unit main body 16 and a slider unit 17.
- the operation section main body 16 extends in the axial direction of the insertion section 10.
- the slider section 17 is slidable in the axial direction of the insertion section 10 along the operation section main body 16.
- the operation section main body 16 is provided with a pair of parallel guide rails 18a and 18b.
- the distal end of the operation section main body 16 is connected and fixed to the base end of the operation tube 13.
- a finger ring 19 is attached to the base end of the operation section body 16.
- the finger hook ring 19 is rotatable around the axis of the operation unit body 16.
- the slider 17 has a pair of holes 20a and 20b.
- a pair of guide rails 18a, 18b of the operation section main body 16 are respectively passed through the holes 20a, 20b.
- the slider portion 17 is supported slidably in the axial direction of the insertion portion 10 while being guided by the guide rails 18a and 18b of the operation portion main body 16.
- a rear end portion of the operation wire 14 is connected and fixed to the slider portion 17. Then, in accordance with the sliding operation of the slider section 17, the operation wire 14 is pushed and pulled.
- An outer sheath grip 21 is connected to a base end of the outer sheath 12.
- the outer sheath gripping portion 21 is attached to the distal end portion of the operation portion main body 16 so as to be able to advance and retreat in the axial direction of the insertion portion 10.
- a cock portion 22 protrudes from an outer peripheral surface of the outer sheath grip portion 21.
- the snare operation tool 3 is set in a state where the hook 15a of the hook member 15 is inserted into the connection ring 6 of the indwelling snare 2 and is removably engaged. In this state, it is used for the operation of the detention snare 2.
- the indwelling snare 2 has a distal tip (biological tissue ingestion preventing means) 23 fixed to the distal end of the loop portion 4 of the snare wire 5.
- the distal tip 23 has a contact area with the living tissue H to be ligated S is larger than the contact area of the snare wire 5 and has a contact surface 23a.
- the diaphragm member 7 similarly to the distal end tip 23, has a larger contact area with the living tissue H to be ligated, a larger contact area with the canner wire 5, and a rear end ring provided with a contact surface 24a. ) Formed by 24.
- the tip tip 23 and the rear end ring 24 are made of an elastic material such as rubber, It is formed of a synthetic resin material.
- the indwelling snare 2 is set in a state where the indwelling snare 2 is connected to the snare operation tool 3 in advance.
- the distal end of the outer sheath 12 of the snare operating tool 3 also has the distal end of the operating tube 13 protruding forward.
- the hook member 15 of the operation wire 14 projects forward as well as the tip force of the operation tube 13.
- the hook 15a of the hook member 15 is inserted into the connecting ring 6 of the indwelling snare 2 and engaged with the hook 15a in a detachable manner.
- the operation wire 14 is pulled toward the hand side.
- the rear end of the squeezing member 7 of the indwelling snare 2 is moved to a position where the rear end of the squeezing member 7 is slightly pressed against the front end of the operation tube 13.
- the entire indwelling snare 2 is moved to a position where it is accommodated inside the outer sheath 12.
- the distal end of the insertion portion 10 of the snare operating tool 3 inserted into the body through the channel 9 of the endoscope 8 is guided in the direction of the target biological tissue H.
- the distal force of the outer sheath 12 is projected forward together with the operation tube 13 with the indwelling snare 2 as shown in FIG.
- the loop portion 4 of the indwelling snare 2 is expanded into a loop shape as shown in FIG. 2A by the elasticity of the snare wire 5 itself.
- the snare operating tool 3 is operated, and the target living tissue H is inserted into the loop portion 4 of the indwelling snare 2 as shown in FIG.
- the slider portion 17 of the snare operation tool 3 is pulled rearward with respect to the operation portion main body 16.
- the squeezing member 7 is relatively pushed forward (the distal end side of the loop portion 4) by the operation tube 13 with the operation of pulling the operation wire 14 toward the hand side.
- the loop portion 4 of the snare wire 5 is narrowed.
- the root portion of the target living tissue H inserted into the loop portion 4 is strangled by the loop portion 4 of the snare wire 5.
- the loop portion 4 between the distal end tip 23 and the rear end ring 24 abuts the living tissue H from the side as it is. Since the lateral force and the force acting on the living tissue H are smaller than those of the contact portions before and after the loop portion 4 described above, the snare wire 5 between the distal tip 23 and the rear end ring 24 is applied to the living tissue H as much as necessary. Secure the snare 2 with eclipse, inset and indwelling.
- the resection snare 25 includes a resection snare introduction tube 26, an elongated operation wire 27, and a resection loop 28.
- the operation lever 27 is inserted into the tube 26 so as to be movable in the axial direction.
- the loop portion 28 is provided at the tip of the operation wire 27. Further, the loop portion 28 has a habit of expanding in a loop shape.
- the target living tissue H is inserted into the loop portion 28 of the resection snare 25.
- the resection snare introduction tube 26 is pushed forward.
- the loop portion 28 of the snare 25 for resection is drawn into the snare introduction tube 26 for resection.
- the upper portion of the ligated portion of the living tissue H ligated by the indwelling snare 2 is cut by the loop portion 28 of the cutting snare 25.
- a cut surface HI cut by the cutting snare 25 is formed on the upper part of the ligated portion of the living tissue H ligated by the indwelling snare 2.
- the cut piece of the living tissue H that has been excised at this time is collected (collected) by one of the following two methods.
- the grasping forceps is inserted into the body through the channel 9 of the endoscope 8, for example. With the cut piece of the living tissue H held by the grasping forceps, it is taken out of the body together with the grasping forceps and collected.
- a cut piece is suctioned outside the body through the channel 9 of the endoscope 8 and collected.
- the above configuration has the following effects. That is, in the present embodiment, when the living tissue H is strung by the indwelling snare 2, the distal tip 23 and the rear end ring 24 before and after the loop portion 4 of the snare wire 5 are ligated as shown in FIG. 6A. H can be contacted in surface contact. Therefore, at the time of the squeezing operation of the loop portion 4 of the snare wire 5 (when the living tissue H to be ligated by the snare wire 5 is ligated), the contact portions before and after the loop portion 4 where a large force acts on the living tissue H to be ligated.
- the force acting on the living tissue H to be ligated can be dispersed over the entire contact surfaces 23a and 24a having a large contact area. Therefore, it is possible to prevent the loop portion 4 from biting into the living tissue H to be ligated at the contact portions before and after the loop portion 4.
- the snare wire 5 of the loop portion 4 is brought into direct contact with the living tissue H to be ligated.
- the wire 5 can bite into the living tissue H with relatively light force. Therefore, the living tissue H force to be ligated can also prevent the indwelling snare 2 from falling off.
- the snare wire 5 can bite into the living tissue H with a relatively light force in the region between the distal tip 23 and the rear end ring 24, for example, there is a possibility that the blood flow inside the ligated portion is obstructed. Absent.
- a cutting snare 25 is provided on the upper end of the distal tip 23 and the rear end ring 24 of the indwelling snare 2.
- the loop 28 is brought into contact. Thereby, the cutting position of the living tissue H by the cutting snare 25 can be determined. Therefore, there is a sufficient margin between the cut surface HI of the living tissue H by the resection snare 25 and the loop portion 4 of the snare wire 5 of the indwelling snare 2 (for example, (For example, about 11-5mm).
- the cutting snare 25 places the upper portion of the ligated portion of the living tissue H at the base. Slipping to the side can be reliably prevented.
- the front end face of the front end tip 23 of the indwelling snare 2 and the rear end face of the rear end ring 24 may be rounded.
- the roundness of the front end face of the tip tip 23 and the rear end face of the rear end ring 24 is reduced.
- the portion allows the resection snare 25 to be smoothly guided to the resection surface HI of the living tissue H. Therefore, the operation of cutting the cut surface HI of the living tissue H by the cutting snare 25 can be easily performed.
- FIG. 9 shows a second embodiment of the present invention.
- the configuration of the indwelling snare 2 of the medical ligation device 1 of the first embodiment is changed as follows.
- the wire interval holding portion 31 is provided at the connection portion between the rear end surface of the tip tip 23 and the loop portion 4 of the snare wire 5.
- the wire gap holding section 31 holds the two wire wires 5b and 5c at the front end of the loop section 4 of the snare wire 5 with a gap therebetween.
- the two wire wires 5b and 5c at the front end of the loop portion 4 of the snare wire 5 are separated by the wire interval holding portion 31 on the rear end surface of the tip 23. Therefore, when the loop portion 4 of the snare wire 5 is squeezed (when the living tissue H to be ligated by the snare wire 5 is ligated), the wire interval holding portion 31 reliably ligates the wire. It can be brought into contact with the target living tissue H over a wide area. Therefore, it is possible to reliably prevent the loop portion 4 from digging into the living tissue H to be ligated at the contact portion at the front end of the loop portion 4 of the snare wire 5.
- FIG. 10 shows a third embodiment of the present invention. This embodiment is the first The configuration of the indwelling snare 2 of the medical ligation device 1 of the embodiment (see FIGS. 1 to 8) is changed as follows.
- the needle-shaped engaging claw 32 is projected rearward on the rear end surface of the tip 23. Further, a needle-like engaging claw 33 is provided to protrude forward from the front end surface of the rear end ring 24.
- the distal tip 23 and the rear end ring 24 can be locked to the living tissue H to be ligated while each of 3 is inserted into the living tissue H to be ligated. Therefore, it is possible to prevent the living tissue H force indwelling snare 2 to be ligated from falling off and falling off.
- FIG. 11 shows a fourth embodiment of the present invention.
- the configuration of the indwelling snare 2 of the medical ligation device 1 of the second embodiment is changed as follows.
- the needle-shaped engaging claw 34 is provided to project rearward from the wire spacing holding portion 31 on the rear end surface of the tip 23. Further, a plurality of needle-shaped engaging claws 35 are projected forward from the front end face of the rear end ring 24.
- the distal tip 23 and the rear end ring 24 can be locked to the living tissue H to be ligated while the respective 5 are inserted into the living tissue H to be ligated. Therefore, in the present embodiment, similarly to the indwelling snare 2 of the third embodiment, the indwelling snare 2 of the living tissue H to be ligated can be prevented from falling off and falling off.
- FIG. 12 shows a fifth embodiment of the present invention.
- the configuration of the indwelling snare 2 of the medical ligation device 1 of the first embodiment is changed as follows.
- a fixing portion 36 to which the distal end portion of the loop portion 4 of the snare wire 5 is fixed is provided at a position where the center line positioning force of the rear end surface of the distal end tip 23 is also deviated. I have. Further, the rear end ring 24 is positioned at a position corresponding to the fixing portion 36 of the tip 23. Press-fit holes 37 for the two wire wires 5b and 5c of the near wire 5 are provided.
- the fixing portion 36 of the loop portion 4 of the snare wire 5 is arranged at a position where the center line position of the rear end surface of the tip 23 is also out of force, and the rear end ring 24 is press-fitted.
- the hole 37 is also arranged at a position corresponding to the fixing portion 36 of the tip 23. Therefore, by setting the cutting surface HI of the living thread H by the cutting snare 25 at the position farthest from the fixing portion 36 of the tip 23 and the press-fit hole 37 of the rear end ring 24, the cutting snare is formed. 25, the margin between the cut surface HI of the living tissue H and the loop portion 4 of the snare wire 5 of the indwelling snare 2 can be increased.
- FIGS. 13A and 13B show a sixth embodiment of the present invention.
- the configuration of the medical ligation device 1 of the first embodiment (see FIGS. 1 to 8) is changed as follows.
- the tip tip 23 and the rear end ring 24 of the indwelling snare 2 are formed by an elastic body 38 that can be elastically deformed.
- the elastic body 38 of the distal end tip 23 and the rear end ring 24 is held in a reference shape having a diameter larger than the diameter of the outer sheath 12 in a natural state, for example, as shown in FIG. 13B.
- the elastic body 38 of the distal tip 23 and the rear end ring 24 has a compressed shape compressed to the same diameter as the outer sheath 12. It is stored in the outer sheath 12 in an elastically deformed state.
- the elastic body 38 of the distal tip 23 and the rear end ring 24 It is elastically deformed to return to a reference shape having a diameter larger than the diameter of the outer sheath 12. Therefore, when the loop portion 4 of the snare wire 5 is squeezed (when the living tissue H to be ligated by the snare wire 5 is ligated), the living body to be ligated is reliably connected to the large-diameter reference tip 23 and the rear end ring 24. A large area can be brought into contact with the tissue H. Therefore, it is possible to reliably prevent the loop portion 4 from biting into the living tissue H to be ligated at the contact portion between the front end portion and the rear end portion of the loop portion 4 of the snare wire 5.
- the elastic body 38 of the distal tip 23 and the rear end ring 24 is compressed to the same diameter as the outer sheath 12.
- Sa It is housed in the outer sheath 12 in a state of being elastically deformed to the compressed shape. Therefore, it is possible to prevent the large-diameter reference tip 23 and the rear end ring 24 from protruding outside the outer sheath 12 when the endoscope is inserted into the channel or the like. The workability of the work of inserting 1 can be improved.
- FIGS. 14 to 15A to 15C show a seventh embodiment of the present invention.
- the configuration of the medical ligation device 1 of the first embodiment (see FIGS. 1 to 8) is changed as follows.
- a clip member 41 that is attached to the placement section of the placement snare 2 in an externally fitted state is provided.
- the clip member 41 includes a pair of holding pieces 42a and 42b urged in a direction in which the distal ends are closed, and a connecting portion 42c communicating between the base ends of these holding pieces 42a and 42b.
- a circular hole 43 into which the operation tube 13 is inserted is formed in the axis of the connecting portion 42c.
- the clip member 41 is set with the distal end of the operation tube 13 inserted into the circular hole 43 of the connecting portion 42c.
- a clip operation tube 44 is inserted between the outer sheath 12 and the operation tube 13 so as to be movable in the axial direction. As the clip operation tube 44 is pushed forward, the clip member 41 is pushed forward.
- the indwelling snare 2 is inserted into the body through the channel 9 of the endoscope 8 in the same procedure as in the first embodiment. Thereafter, the distal force of the outer sheath 12 is projected forward together with the operation tube 13 and the clip member 41. At this time, the loop portion 4 of the indwelling snare 2 is expanded into a loop shape as shown in FIG. 14 by the elasticity of the snare wire 5 itself.
- the snare operation tool 3 is moved so that the target living tissue H is inserted into the loop portion 4 of the indwelling snare 2.
- the throttle member 7 is pushed forward by the operation pipe 13 (toward the tip of the loop portion 4).
- the loop portion 4 of the snare wire 5 is narrowed.
- the root portion of the target living tissue H inserted into the loop portion 4 is strangled by the loop portion 4 of the snare wire 5.
- the clip operation tube 44 is pushed forward. Operation of this clip operation tube 44 As a result, the clip member 41 is pushed forward. As a result, as shown in FIG. 15C, the clip member 41 is externally fitted to the ligated portion of the living tissue H that has been ligated by squeezing the loop portion 4 of the indwelling snare 2 with the squeezing member 7.
- the position of the cutting snare 25 is determined by the clip member 41 which is fitted in an externally fitted state on the living tissue ligated by the indwelling snare 2. Can be positioned. Therefore, a sufficient margin can be provided between the resection surface H1 of the living tissue H by the resection snare 25 and the loop portion 4 of the snare wire 5.
- FIG. 16 to FIG. 18 show an eighth embodiment of the present invention.
- FIG. 16 shows a schematic configuration of the entire medical ligation device 51 of the present embodiment.
- the medical ligating device 51 includes a ligating device 52 for ligating the living tissue H and a cutting tool 53.
- the ligation device 52 has an indwelling snare 54 and a snare operating tool 55 for operating the indwelling snare 54.
- FIG. 17 shows an indwelling snare 54 of the present embodiment.
- the indwelling snare 54 has a snare wire 57, a connection ring 58, and a ring-shaped throttle member 59.
- the snare wire 57 has a ligating loop portion 56 that can be expanded in a loop shape on the distal end side.
- the connection ring 58 is provided on the base end side of the snare wire 57.
- the throttle member 59 is inserted with the base end side of the snare wire 57 pressed in.
- the snare wire 57 is formed of, for example, a synthetic resin material having good biocompatibility.
- the indwelling snare 54 has a loop portion 56 formed by, for example, bending a snare wire 57 in a loop shape.
- the bent portion 57a of the snare wire 57 is disposed on the distal end side of the loop portion 56.
- the two wire wires 57b and 57c formed by bending the snare wire 57 extend to the base end side of the loop portion 56.
- the two wire wires 57b and 57c extending to the base end side of the loop portion 56 are press-fitted into the throttle member 59 in a bundled state.
- a connection ring 58 is disposed at the extended ends of the two wire wires 57b and 57c extended behind the throttle member 59.
- the snare operation tool 55 has an elongated insertion part 60 and a hand-side operation part 61 connected to the base end of the insertion part 60.
- the insertion portion 60 An outer sheath 62, an operation tube 63, and an operation wire 64.
- the operation tube 63 is inserted inside the outer sheath 62 movably in the axial direction.
- the operation wire 64 is inserted inside the operation tube 63 so as to be movable in the axial direction.
- a proximal end of a hook member (snare connecting portion) 65 is connected and fixed to a distal end of the operation wire 64.
- the hook member 65 has a hook-like hook 65a at the tip thereof.
- the hook 65a protrudes in a direction substantially orthogonal to the axial direction of the operation wire 64.
- the connecting ring 58 of the indwelling snare 54 is detachably engaged with the hook 65a.
- the operation section 61 has an operation section main body 66 and a slider section 67 as in the first embodiment.
- the operation section main body 66 extends in the axial direction of the insertion section 60.
- the slider section 67 is slidable in the axial direction of the insertion section 60 along the operation section main body 66.
- the distal end of the operation section main body 66 is connected and fixed to the base end of the operation tube 63.
- a finger hanging ring 69 is rotatably mounted on the base end of the operation unit main body 66 in the direction around the axis. Then, the operation wire 64 is pushed and pulled by the sliding operation of the slider portion 67.
- an outer sheath gripping portion 71 is connected to a base end of the outer sheath 62.
- the outer sheath gripping portion 71 is attached to the distal end portion of the operation portion main body 66 so as to be able to advance and retreat in the axial direction of the insertion portion 60.
- the snare operation tool 55 is set in a state where the hook 65a of the hook member 65 is inserted into the connection ring 58 of the indwelling snare 54 and is removably engaged. In this state, it is used for the operation of the indwelling snare 54.
- the cutting tool 53 has a cutting snare 72.
- the resection snare 72 includes a resection snare introduction tube 73, an elongated operation wire 74, and a resection loop 75.
- the operation wire 74 is passed through the tube 73 so as to be movable in the axial direction.
- the loop portion 75 is provided at the distal end of the operation wire 74.
- the loop portion 75 has a habit of expanding in a loop shape.
- a plurality of, in this embodiment, two connecting plates 76 are provided between the resection loop 75 of the resection snare 72 and the loop 56 of the indwelling snare 54.
- a substantially C-shaped upper engagement portion 76a is formed at the upper end of each connecting plate 76
- a substantially C-shaped lower engagement portion 76b is formed at the lower end.
- the portion 76a is detachably engaged with the cutting loop portion 75 of the cutting snare 72
- the lower end engaging portion 76b of each connecting plate 76 is detachably engaged with the loop portion 56 of the indwelling snare 54.
- the living tissue H is ligated by the loop portion 56 of the indwelling snare 54 of the ligating apparatus 52. Thereafter, the upper portion of the ligated portion of the indwelling snare 54 by the loop portion 56 is cut off by the loop portion 75 of the cutting snare 72 of the cutting tool 53. During this operation, the connection plate 76 can ensure the interval between the ligated portion of the living tissue H by the loop portion 56 of the indwelling snare 54 and the cut surface by the loop portion 75 of the cutting snare 72.
- two connecting plates 76 are arranged between the loop portion 75 for cutting of the snare 72 for cutting and the loop portion 56 of the indwelling snare 54. Therefore, the connecting plate 76 allows a sufficient margin to be provided between the ligated portion of the living tissue H by the loop portion 56 of the indwelling snare 54 and the cut surface by the loop portion 75 of the cutting snare 72. As a result, it is possible to reliably prevent the resection snare 72 from sliding down the upper portion of the ligated portion of the living tissue H toward the base.
- FIGS. 19 to 24 show a ninth embodiment of the present invention.
- a medical instrument system 81 for full thickness resection of the large intestine is provided.
- the medical device system 81 includes a treatment insertion aid 82, an endoscope 85, and a plurality of treatment tools (gripping forceps 86, a resection snare 90, and a ligation snare 91). .
- the treatment insertion assisting device 82 has an elongated tubular insertion portion 83 inserted into the large intestine, and a proximal grip portion 84.
- the insertion portion 83 is formed of a resin material made of a flexible thermoplastic elastomer.
- a rectangular treatment side hole 88 which is long in the long axis direction of the insertion portion 83 is provided on the outer surface on the distal end side of the insertion portion 83.
- a working space 87 is provided at the distal end side of the insertion portion 83 by partially cutting out the outer side of the insertion portion 83 facing the treatment side hole 88.
- an endoscope guide section 89 is provided at the distal end of the insertion section 83 in front of the treatment side hole 88 and the working space 87.
- the endoscope guide 89 has an endoscope passage 89a.
- the endoscope penetrating device 89a inserts the insertion aid for treatment 82 deep into the large intestine.
- the endoscope penetrating device 89a inserts the insertion aid for treatment 82 deep into the large intestine.
- the insertion aid for treatment 82 is inserted deep into the large intestine.
- the insertion portion 83 of the treatment insertion assisting tool 82 includes an endoscope insertion pipe 92, a resection snare insertion pipe 93, and a ligation snare insertion pipe 94. And extend in the axial direction of the insertion portion 83, respectively.
- the endoscope insertion conduit 92 is formed so as to communicate with the working space 87 from the proximal grip 84.
- the snare insertion duct 93 for resection and the snare insertion duct 94 for ligature are formed so as to communicate from the proximal grip 84 to the vicinity of the rear end position of the treatment side hole 88.
- the endoscope 85 has an elongated insertion portion 85a to be inserted into the body, and an operation portion 85b on the hand side connected to the proximal end of the insertion portion 85a.
- the insertion portion 85a has an elongated flexible tube portion 85c having flexibility, a hard distal portion 85d arranged at the most distal position, and a curved portion 85e capable of being bent and deformed.
- a plurality of operation wires, control signal cables, light guide cables, tubes for water supply and suction or air supply and suction, and channels for various probes are provided inside the insertion portion 85a.
- the endoscope 85 of the present embodiment is a side-viewing endoscope in which the viewing direction of the observation optical system at the distal end portion 85d is orthogonal to or substantially backward from the axial direction of the insertion portion 85a. is there.
- An illumination window, an observation window, a channel opening for air / water supply, a forceps channel opening also serving as a suction port, and the like are provided on a side surface of the distal end portion 85d.
- the emission end of the light guide cable is arranged opposite to the inner surface of the illumination window.
- an objective lens of an observation optical system, an electronic image pickup device (CCD) for imaging a subject observed by the objective lens, and the like are provided on the inner surface of the observation window.
- an objective lens of an observation optical system, an electronic image pickup device (CCD) for imaging a subject observed by the objective lens, and the like are provided on the inner surface of the observation window.
- a forceps raising base (not shown) is provided in the forceps channel opening.
- the forceps raising table is operated by a forceps raising knob (not shown) provided on the operation section 85b. Then, the protruding direction of the distal end gripping portion 86a of the gripping forceps 86, which will be described later, inserted into the forceps channel is deflected by the raising operation of the forceps raising base. It has become so.
- the proximal end of the universal cord 85f is connected to the operation unit 85b.
- the other end of the universal cord 85f is connected to a light source device via a connector (not shown).
- illumination light from the light source device is supplied to the light guide cable in the universal cord 85f.
- An electrical cable is further connected to the connector.
- This electrical cable is connected to the video processor via an electrical connector.
- the electric signal is transmitted to a video processor via a control signal cable, and is shown in FIG. Now, it is displayed on the display monitor!
- the operation unit 85b is provided with an operation knob 85g for bending operation, a forceps channel insertion opening 85h, a forceps raising knob (not shown), and the like. Then, by operating the operation knob 85g, the operation wire in the insertion portion 85a is pulled, and the bending portion 85e is bent, for example, up, down, left and right, to change the direction of the tip portion 85d.
- the grasping forceps 86 is inserted into the forceps channel insertion port 85h.
- the grasping forceps 86 has an elongated insertion section 86b, a hand-side operation section 86c, and a distal end grasping section 86a.
- the operation section 86c is connected to the base end of the insertion section 86b.
- the distal end grip 86a is disposed at the distal end of the insertion section 86b.
- the grasping forceps 86 is inserted from the forceps channel ⁇ through port 85 h of the endoscope 85 into the treatment tool ⁇ ⁇ ⁇ ⁇ ⁇ communication channel, and is inserted into the distal end side of the endoscope 85. Further, the distal end gripping portion 86a of the gripping forceps 86 projects from the distal end portion 85d of the insertion portion 85a into the body cavity. At this time, the operation of a forceps raising knob (not shown) of the operation unit 85b causes the forceps raising table of the forceps channel opening of the distal end portion 85d to be raised, thereby deflecting the projecting direction of the distal end gripping portion 86a inserted into the forceps channel. I'm going to make it.
- the resection snare 90 has a tubular insertion portion 90a.
- a hand operation section 90b is provided on the hand side of the insertion section 90a.
- the hand operation unit 90b is connected to a high-frequency power supply (not shown).
- a loop portion 90c made of a metal loop wire 90e is provided on the distal end side of the insertion portion 90a.
- a metal operation wire 90d is inserted through the insertion portion 90a so as to be able to advance and retreat in the axial direction.
- a loop portion 90c is provided at the tip of the operation wire 90d. Are linked. Then, the operation wire 90d is driven forward and backward in the axial direction by the hand operation section 90b. At this time, the distal end loop portion 90c is operated to protrude and retract from inside the insertion portion 90a via the operation wire 90d.
- the ligation snare 91 has the same configuration as the medical ligation device 1 of the first embodiment (see Figs. 1 to 8).
- the ligation snare 91 has a ligation tool, ie, an indwelling snare 91a shown in FIG. 20A, and a snare operation tool 9lb for operating the indwelling snare 9la.
- the indwelling snare 91a includes a snare wire 9la2 in which a distal end side is formed with a ligation loop 9lal that can be expanded in a loop shape, and a proximal end side of the snare wire 9la2. And a ring-shaped throttle member 91a4 into which the base end side of the snare wire 9la2 is inserted in a press-fit state.
- the snare operating tool 91b has a tubular insertion portion 91bl, and a hand operation portion 9 lb2 arranged on the hand side of the insertion portion 91bl.
- the insertion portion 91b1 has an outer sheath 91b3, an operation tube (not shown) inserted movably in the axial direction inside thereof, and an operation wire (not shown) inserted movably in the axial direction inside thereof. .
- a base end of a hook member (not shown) is connected and fixed to a front end of the operation wire.
- the connecting ring 91a3 of the indwelling snare 91a is detachably engaged with the tip of the hook member.
- the insertion portion 85a of the endoscope 85 is inserted into the endoscope insertion conduit 92 from the proximal gripping portion 84 of the treatment insertion aid 82, and the working space 8 Introduced to 7.
- the resection snare 90 is also inserted from the proximal grip 84 into the resection snare insertion conduit 93 and introduced into the working space 87.
- the ligation snare 91 is also inserted from the proximal grip 84 into the ligation snare insertion conduit 94 and introduced into the working space 87.
- a substantially plate-shaped snare holder 95 for cutting and a snare holder for ligation are provided in the endoscope guide portion 89 of the insertion aid for treatment 82 at the distal end side of the treatment side hole 88.
- 96 are formed substantially in parallel with the treatment side holes 88, respectively.
- the resection snare retainer 95 and the ligation snare retainer 96 are disposed at a position facing the resection snare channel 93 and the ligation snare insertion conduit 94 at an interval substantially equal to the diameter of each channel.
- the loop portion 90c of the resection snare 90 and the loop portion 91al of the indwelling snare 91a are arranged so as to surround the treatment side hole 88 of the treatment insertion aid 82. You. At this time, the distal end of the loop 90c of the resection snare 90 is in contact with the lower surface of the resection snare retainer 95 of the endoscope guide section 89, and the distal end of the loop 9lal of the indwelling snare 91a is used for ligation.
- the snare retainer 96 is set so that it comes into contact with the lower surface side.
- the living tissue H pulled up from the treatment side hole 88 abuts on the loop portion 90c of the resection snare 90 and the loop portion 91al of the indwelling snare 91a, whereby the loop portions 90c and 91al are inadvertently lifted. To prevent that.
- the treatment insertion aid 82 is extrapolated to a direct-view type colonoscope, and then the colonoscope is first inserted to a treatment target site of the large intestine. . Subsequently, the insertion aid for treatment 82 is inserted along the colonoscope up to the treatment target site. After that, the colonoscope is removed from the insertion aid for treatment 82.
- the endoscope 85 is inserted into the insertion aid for treatment 82.
- the distal end portion 85d of the insertion portion 85a of the endoscope 85 is inserted to the affected part of the colon for treatment.
- the endoscope 85 is inserted into the insertion aid for treatment 82, and the treatment side hole 88 of the insertion aid for treatment 82 is aligned with the treatment target site in the field of view observed by the endoscope 85.
- the loop portion 90c of the resection snare 90 and the loop portion 91al of the indwelling snare 91a are arranged so as to surround the treatment side hole 88 of the treatment insertion aid 82. .
- the loop 90c of the resection snare 90 and the loop 9la1 of the indwelling snare 9la are set as follows. That is, the loop portion 90c of the resection snare 90 is in a state where the distal end portion is in contact with the lower surface side of the resection snare retainer 95 of the endoscope guide portion 89. The loop portion 91al of the indwelling snare 91a is in a state where the distal end portion is in contact with the lower surface side of the ligation snare retainer 96.
- the grasping forceps 86 is inserted into the forceps channel ⁇ communication port 85h of the endoscope 85.
- the distal end gripping portion 86a of the gripping forceps 86 inserted into the forceps channel of the endoscope 85 projects outside the forceps channel opening force of the distal end portion 85d of the endoscope 85.
- the distal end grasping portion 86a of the grasping forceps 86 is moved toward the treatment side hole 88.
- the treatment target site of the large intestine is gripped by the distal end gripping portion 86a of the gripping forceps 86.
- the distal end of the loop portion 91al is in contact with the snare retainer for ligation 96, and the distal end of the loop portion 90c is in contact with the snare retainer for excision 95. Therefore, the living tissue H pulled up from the treatment side hole 88 comes into contact with the loop portion 90c of the resection snare 90 and the loop portion 91al of the indwelling snare 91a, whereby the loop portions 90c and 91al are inadvertently lifted. Is prevented. As a result, the gap between the loop 90c of the resection snare 90 and the loop 91al of the indwelling snare 91a is maintained at an appropriate length.
- the loop operating portion 90c of the snare for resection 90 and the loop portion 91a1 of the indwelling snare 91a are drawn down by operating the hand operating portion 90b of the snare for resection 90 and the snare operating tool 91b of the snare for ligation 91.
- the appropriate positions of the living tissue H can be respectively strangled.
- the living tissue H is cut by applying a high frequency to the looper 90e of the loop section 90c via the hand operation section 90b of the cutting snare 90.
- the indwelling snare 9la is detached from the snare operating tool 9 lb, The living tissue H is ligated.
- the shape of the treatment side hole 88 is formed by a vertically long rectangular opening that is long in the axial direction of the insertion portion 83, and thus the treatment side hole 88 is pulled up from the treatment side hole 88.
- the cross-sectional shape of the living tissue H to be treated can also be formed into a vertically long rectangular opening close to the shape of the opening of the treatment side hole 88. Therefore, the shape of the resection hole H3 formed at the time of full thickness resection of the large intestine H2 can make the length in the direction orthogonal to the axial direction shorter than the length in the axial direction of the large intestine H2.
- the above configuration has the following effects. That is, in the present embodiment, the snare insertion conduit 93 for resection of the insertion portion 83 of the treatment insertion aid 82 is disposed above the ligation snare insertion conduit 94 in FIG. 20B. As a result, a sufficient margin can be provided between the ligated portion of the living tissue H by the loop portion 91al of the indwelling snare 91 and the cut surface by the loop portion 90c of the cutting snare 90. As a result, it is possible to reliably prevent the resection snare 90 from sliding down to the root side when the upper portion of the ligated portion of the living tissue H is strangled and resected.
- the shape of the treatment side hole 88 is a vertically long rectangular opening that is long in the axial direction of the insertion portion 83. Therefore, at the time of full-size colon resection, the living tissue to be treated is pulled up into the working space 87 through the opening of the treatment side hole 88, and the root portion of the pulled up living tissue to be treated is one ligature, that is, With the indwelling snare 91, it can be ligated and sutured in a state of being folded efficiently.
- the configurations of the resection snare 90 and the ligation snare 91 shown in the present embodiment are not limited to those of the present embodiment, but may be the configurations shown in the first to eighteenth embodiments of the present invention. It may be.
- FIGS. 25A and 25B show a tenth embodiment of the present invention.
- This embodiment is a modification of the configuration of the indwelling snare 2 of the first embodiment (see FIGS. 1 to 8) as follows.
- a taper portion 102 that expands obliquely and forward is provided below the through portion of the snare wire 5 on the rear end face 101 of the distal tip 23.
- a tapered portion 103 that expands obliquely rearward is provided below the through portion of the snare wire 5 also on the front end contact surface 24a of the rear end ring 24.
- the distal end of the living tissue H is sandwiched between the rear end surface 101 of the distal tip 23 and the distal contact surface 24 a of the rear end ring 24.
- the tapered portion 102 of the tip 23 and the tapered portion 103 of the rear end ring 24 are arranged.
- a tapered portion 102 is provided on the rear end surface 101 of the distal tip 23, and a tapered portion 103 is similarly provided on the distal contact surface 24a of the rear end ring 24, as shown in FIG.
- the ligation force of the living tissue H by the indwelling snare 102 is It is determined only by the drawing force between the tip contact surface 24a. For this reason, when the ligated portion of the living tissue H having a large drawing force between the rear end surface 101 of the distal tip 23 and the front contact surface 24a of the rear end ring 24 is excessively tightened (when the ligating force is high), Crushing of woven fabric H and necrosis due to insufficient blood flow may occur. Conversely, if the ligating power is low, effective ligating cannot be performed.
- the tapered portions 103 and 104 are provided.
- the ligating force changes continuously in the area between the. Therefore, since the serosal surfaces of the living tissue H can be brought into contact with each other with an appropriate force in any of the ranges, the living tissue can be securely ligated without excessively tightening the living tissue H.
- FIGS. 26A to 26D show an eleventh embodiment of the present invention.
- This embodiment is a modification of the medical instrument system 81 for full thickness resection of the large intestine shown in the ninth embodiment (see FIGS. 19 to 24).
- An operation tool 120 is provided.
- the other parts have the same configuration as the ninth embodiment. Therefore, the same portions as those in the ninth embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- the ligating device 119 has a ligating device main body 121 and a receiving plate 122. As shown in FIG. 26B, the ligating device main body 121 has a substantially crescent-shaped plate-like member 121a made of hard resin. The plate-like member 12 la is set to have a shape inscribed in the insertion portion 83 of the treatment insertion aid 82.
- a plurality of puncture needles 121b protrude from the front surface of the plate member 121a. These three puncture needles 121b are arranged along the arcuate inner surface of the insertion section 83. ing.
- a return portion 121c having a larger diameter than the shaft portion is formed at the tip of each puncture needle 121b.
- the tip surface of the return portion 121c is formed in a tapered conical shape.
- a slit 121d is formed on the distal end surface of each puncture needle 121b along the axial direction thereof.
- a tapered portion 121e that expands obliquely rearward is provided below the puncture needle 121b on the front surface of the plate-like member 121a.
- fitting holes 121f are provided on the rear surface of the plate-like member 121a at positions corresponding to the respective puncture needles 121b. Note that one fitting hole 121f may be provided at the center of the rear surface of the plate-like member 121a.
- the receiving plate 122 of the ligating device 119 is formed of a plate-like member having substantially the same shape as the plate-like member 121a of the ligating device main body 121.
- the receiving plate 122 has a through hole 122a formed at a position corresponding to each puncture needle 121b of the plate-like member 121a. Further, on the rear surface of the receiving plate 122, there is provided a tapered portion 122c that expands diagonally forward and below the through holes 122a.
- the insertion portion 83 of the insertion aid 82 for treatment according to the present embodiment is provided with a ligature pushing-out member-through conduit 123 behind the treatment side hole 88.
- the ligature push-out member insertion channel 123 is in a state of communicating from the proximal grip 84 to the vicinity of the rear end position of the treatment side hole 88, similarly to the ligation snare insertion channel 94 of the ninth embodiment. Is formed.
- the ligating device operation tool 120 includes a substantially rigid rod-shaped member 120a and a wire member 120b.
- the rod-shaped member 120a has a length from the distal end side of the ligating-tool pushing-out member-through conduit 123 to the distal end side of the treatment side hole 88.
- the distal end of the rod-shaped member 120a is removably fitted into the fitting hole 12If of the ligating device main body 121.
- the wire member 120b is inserted in the ligating-tool pushing-out member-through conduit 123 so as to be able to advance and retreat in the axial direction.
- the distal end of the wire member 120b is connected to the rear end of the rod-shaped member 120a. Further, the rear end of the wire member 120b is extended to the hand side grip portion 84 of the treatment insertion assisting tool 82. Then, by the operation of the hand side grip portion 84, the wire member 120b is driven to advance and retreat in the axial direction in the ligating tool pushing member-through conduit 123.
- the ligating device 120 is slidable back and forth by the length of the distal end of the rod-shaped member 120a moving from the rear end to the distal end of the treatment side hole 88.
- a ligature 119 is attached to the insertion portion 83 of the treatment insertion aid 82 of the present embodiment.
- the ligating device body 121 of the ligating device 119 is set in a state of being disposed between the proximal end of the treatment side hole 88 and the ligating device pushing-out member 123.
- the receiving plate 122 of the ligature 119 is set in a state where it is arranged at a position corresponding to the ligature main body 121 on the distal end side of the treatment side hole 88.
- the insertion portion 83 of the insertion aid for treatment 82 according to the present embodiment is provided with a fitting groove 124 in which the receiving plate 122 is fitted on the distal end side of the treatment side hole 88.
- the resection snare 90 is set in a state in which the resection snare insertion pipe 93 also protrudes similarly to the ninth embodiment, and the loop portion 90 c is in contact with the lower surface of the snare retainer 95. .
- the treatment insertion assisting device 82 is inserted to the treatment target site of the large intestine in the same procedure as in the ninth embodiment. Then, in a state where the living tissue H is grasped by the distal end grasping portion 86a of the grasping forceps 86 in the same procedure as in the ninth embodiment, the treatment side hole 88 and the loop portion 90c of the resection snare 90 are passed through. To the working space 87.
- the ligating device operation tool 120 is protruded forward by an operation on the near side (not shown). During this operation, the plate-like member 121a of the ligating device main body 121 is pushed forward. Therefore, as shown in FIG. 26C, the three puncture needles 121b of the ligating device main body 121 are penetrated into the root portion of the living tissue H pulled into the working space 87, and furthermore, the receiving plate 122 is bent while being slit by the slit 121d. Into each through hole 122a.
- the rod-like member 120a of the ligating device operating tool 120 functions as a guide, and the puncture needle 121b is securely inserted into each of the through holes 122a of the receiving plate 122.
- the return portion 121c abuts on the distal end side of the receiving plate 122 and is fixed.
- FIG. 26D shows the affected part of the living tissue H after resection.
- the living tissue H is ligated firmly between the plate-like member 121a of the ligating device main body 121 and the receiving plate 122.
- a taper portion 122c is provided on the receiving plate 122 below the penetration point of the ligation tool main body 121 with the puncture needle 121b, and a taper portion 121e is provided on the plate-like member 121a of the ligation tool main body 121, respectively.
- the tightening of the living tissue H is continuously relaxed by the tapered portion 122c of the receiving plate 122 and the tapered portion 121e of the plate member 121a of the ligating device main body 121.
- the serosal surfaces of the living tissue H can be securely pressed against each other with an appropriate amount of tightening force within the range, and the tissue adhesion can be realized safely and reliably.
- a snare wire in which a ligating loop portion whose distal end side can be expanded in a loop shape is formed, a connection ring provided on a proximal end side of the snare wire, and a proximal end side of the snare wire are press-fitted.
- An indwelling snare having a ring-shaped throttle member inserted in a state, and a snare operation in which a snare connecting portion to which the connecting ring is detachably connected to a distal end of an elongated insertion portion to be inserted into a body is provided.
- the loop member of the snare wire is pushed out by pushing the throttle member toward the distal end side of the snare wire.
- the ligating device is disposed at least at the rear end side of the loop portion of the snare wire when the living tissue to be ligated is ligated by the snare wire.
- a medical ligation device comprising a means for preventing a living tissue to be ligated from being entangled and having a contact surface having a contact area with a living tissue to be ligated larger than a cross-sectional area of the snare wire.
- the biological tissue intrusion prevention means includes a living body to be ligated to the contact surface. 2.
- Additional Item 3 The medical ligating apparatus according to Additional Item 1 or 2, wherein the living tissue intrusion prevention means is provided before and after the loop portion of the snare wire, respectively.
- the living tissue intrusion prevention means when resecting an upper part of a ligated part on a root side of a living tissue to be ligated ligated by the indwelling snare, may be provided at a position above the ligated part.
- At least an endoscope insertion channel is inserted into an insertion portion to be inserted into a body lumen, and a ligation treatment tool for inserting a ligation tool for ligating a living tissue is inserted.
- a treatment insertion aid having a working space
- the ligation treatment tool inserted into the ligation channel and set in a state of being placed at a position surrounding the periphery of the opening;
- Tissue pulling means for pulling the living tissue to be ligated through the opening by bending the endoscope in a state where the living tissue is gripped by the gripping portion of the gripping treatment tool;
- a living tissue ligated through the resection channel and ligated by the ligating means is ligated.
- a resection treatment tool for resecting the ligated part With a resection treatment tool for resecting the ligated part,
- the shape of the opening of the insertion aid for treatment is set so that the length in the direction perpendicular to the axial direction is shorter than the length in the axial direction of the insertion aid for treatment. Medical equipment.
- a treatment tool for excision is arranged on an upper part of a ligation site on a root side of a living tissue to be ligated by the indwelling snare
- the treatment tool for resection is driven by a squeezing member that squeezes a loop portion of the snare wire as a guide.
- a biological tissue excision step of excising an upper portion of the ligated site while leaving a predetermined cutting margin between the resection surface above the ligated site and the ligated site. Living tissue resection method.
- the present invention is effective in the technical field of manufacturing and using a medical ligating device that is inserted into a body and indwells a ligation target in the body while being ligated with an indwelling snare.
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Reproductive Health (AREA)
- Vascular Medicine (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgical Instruments (AREA)
- Endoscopes (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04792012A EP1671594A4 (en) | 2003-10-06 | 2004-10-04 | MEDICAL CLAMP TYPE DEVICE, MEDICAL INSTRUMENT, AND METHOD FOR CUTTING ORGAN TISSUE USING THE DEVICE |
US11/375,946 US20060253128A1 (en) | 2003-10-06 | 2006-03-15 | Medical ligation apparatus and surgical instrument and method for living tissue resection utilizing the apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-347310 | 2003-10-06 | ||
JP2003347310A JP2005110860A (ja) | 2003-10-06 | 2003-10-06 | 医療用結紮装置 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/375,946 Continuation US20060253128A1 (en) | 2003-10-06 | 2006-03-15 | Medical ligation apparatus and surgical instrument and method for living tissue resection utilizing the apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005032384A1 true WO2005032384A1 (ja) | 2005-04-14 |
Family
ID=34419577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/014601 WO2005032384A1 (ja) | 2003-10-06 | 2004-10-04 | 医療用結紮装置とその装置を利用する生体組織切除用の医療器具とその方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060253128A1 (ja) |
EP (1) | EP1671594A4 (ja) |
JP (1) | JP2005110860A (ja) |
WO (1) | WO2005032384A1 (ja) |
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WO2013146727A1 (ja) * | 2012-03-27 | 2013-10-03 | 国立大学法人大阪大学 | 内視鏡用オーバーチューブ |
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CN113712608B (zh) * | 2021-05-14 | 2022-06-17 | 浙江大学 | 完全腹腔镜下绕肝带法二步切除病患侧肝的手术方法及其器械 |
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JP2023179955A (ja) * | 2022-06-08 | 2023-12-20 | 国立大学法人 香川大学 | スネア |
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Also Published As
Publication number | Publication date |
---|---|
JP2005110860A (ja) | 2005-04-28 |
EP1671594A4 (en) | 2010-11-24 |
US20060253128A1 (en) | 2006-11-09 |
EP1671594A1 (en) | 2006-06-21 |
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