JPH10137177A - Organic tissue recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic tissue recovery device which enables recovering of a plurality of excision samples in a plurality of times by inserting or removing an endoscope once. SOLUTION: An organic tissue recovery device 10 is constituted of an inserting part 20 and an operating part 30 and provided with three grip forceps 40, 50 and 60 made free to stick from or sink into the tip surface 22 of the inserting part 20. Internal sheaths 42, 52 and 62 stick by a desired value from the tip surface 22 of the inserting part 20 by operating sliders 43, 53 and 62 fastened on hand side end parts of the internal sheaths 42, 52 and 62. The tip parts 42a, 52a and 62a are so formed as not to interfere with one another, and three forceps arms with claws 44, 54 and 64 are arranged in the inside thereof which is made liable to wide open. In the forceps arms with claws 44, 54 and 54, by operating rings 46, 56 and 66, operation wires 45, 55 and 65 are moved to hold a desired excision part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biological tissue collecting tool for recovering a plurality of resected specimens by one insertion and removal of an endoscope when the resected specimens of a living tissue are collected transendoscopically. .

[0002]

2. Description of the Related Art In recent years, while observing an endoscope image by inserting an insertion portion of an endoscope into a body cavity, a collection tool inserted into a forceps channel of the endoscope and guided to a site to be examined is used. Techniques for removing internal polyps and mucous membranes are widely used.

[0003] Resections such as polyps and mucous membranes removed by the recovery tool are always recovered as resection specimens for pathological diagnosis. As a collecting tool used for collecting the resected specimen, there is a basket-type foreign object collecting forceps 1 as shown in FIG.

As shown in FIG. 1, the basket type foreign object collecting forceps 1 includes four basket wires 3 which can freely protrude and retract from a distal end surface of a sheath 2 and expand when they protrude from a distal end surface 2a of the sheath. 3 sheath tip surface 2a
Knob 5 provided at the rear of the operation unit 4 for operating the plunge
It is constituted by such as.

[0005] When collecting a resected specimen with the foreign matter collecting forceps 1, first, the sheath distal end surface 2a is made to face the resected part. Then, in this state, the basket wire 3 is made to protrude from the sheath distal end surface 2a and expanded, and then the basket wire 3 is brought into contact with the cut portion, and the knob 5 is operated to put the basket wire 3 into the sheath 2. Pull back to change from open to closed. Then, the cut portion is gripped by these closing basket wires 3. Here, the resected specimen is collected by removing the basket wire 3 holding the resected specimen from the body together with the endoscope.

[0006]

However, with the above-described foreign matter collecting forceps, only one resected specimen can be collected by one insertion and removal of the endoscope. For this reason, when a plurality of resected specimens are required, insertion and removal of the endoscope must be repeatedly performed until a desired number of resected specimens are collected. And the burden on the operator increases.

The present invention has been made in view of the above circumstances, and is a biological tissue collecting tool capable of collecting a plurality of resected specimens irrespective of size by a single insertion and removal of an endoscope. The purpose is to provide.

[0008]

According to the present invention, there is provided a living tissue collecting tool which slides in a longitudinal direction of a sheath portion inside a sheath portion inserted through a forceps channel of an endoscope from a distal end surface of the sheath portion. A plurality of the same resection / recovery means protruding and retracting are provided, and each resection / recovery means is independently slidable.

According to this configuration, the sheath portion of the living tissue collecting tool disposed via the forceps channel of the endoscope inserted into the body cavity is guided to the target site, and is disposed in the sheath portion. First, only one excision and collection means out of the plurality of excision and collection means is protruded from the distal end surface of the sheath portion to grip the excision specimen. Subsequently, the living tissue collection tool is guided to the next target site, and another excision and collection means is protruded from the distal end surface of the sheath to grip the resected specimen. These operations are repeated to grasp the required number of resected specimens, or after all the plurality of resection and collection means have grasped the resected specimens, and then remove the endoscope so that the endoscope can be inserted and removed once. Multiple resected specimens are collected.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 relate to a first embodiment of the present invention. FIG. 1 is an explanatory view showing a schematic configuration of a biological tissue collecting tool. FIG. 2 is a diagram showing a plurality of biological tissue collecting tools provided in a sheath and capable of protruding and retracting from the sheath. FIG. 3 is a front view and a side view illustrating the configuration of the grasping forceps, FIG. 3 is an explanatory view showing a state in which one grasping forceps protruding from the sheath is grasping the resected specimen, and FIG. It is an explanatory view showing a state where it is doing.

As shown in FIG. 1, a living tissue collecting tool 10 according to the present embodiment includes an insertion portion 20 formed of an elongated and flexible sheath 21 which can be inserted into a forceps channel of an endoscope (not shown). It is mainly constituted by an operation section 30 provided on the hand side of the insertion section 20.

As shown in the figure, for example, three grasping forceps 40, 50, and 60 are provided as resection and retrieving means capable of protruding and retracting from the distal end surface 22 of the insertion portion 20. That is, in the present embodiment, the grip portion 41 and the inner sheath 42 of the first grip forceps 40, the grip portion 51 and the inner sheath 52 of the second grip forceps 50, the grip portion 61 of the third grip forceps 60, and the inner sheath. 62 are configured to protrude from the distal end surface 22, respectively.

As shown in FIG. 2, the first grasping forceps 40, the second grasping forceps 50, and the third grasping forceps 50 are provided inside a flexible sheath 21 forming the insertion portion 20 of the living tissue collecting tool 10. Inner sheaths 42, 52, 62 constituting grasping forceps 60
Are inserted, and the proximal ends of the inner sheaths 42, 52, and 62 protrude from the rear end of the operation unit 30.

As shown in FIG. 1, these inner sheaths 42,
Sliders 43, 53, 63 which can move independently with respect to the sheath 21 are fixed to the proximal ends of 52, 62, respectively. As a result, the sliders 43, 53,
By operating each of the inner sheaths 4
2, 52, 62 are moved in the distal direction, for example, so that the distal end surfaces of the inner sheaths 42, 52, 62 are inserted into the insertion section 2.
It can be made to protrude by a desired amount from the front end face 22 of the zero.

On the other hand, the tip portions 42a, 52a, 62a of the inner sheaths 42, 52, 62 are formed in a curved shape so as to spread outwardly from each other as shown in FIGS. An elastic member having a claw portion at a distal end portion which is bent and bent so as to expand outward with respect to the central axis of each of the inner sheaths 42, 52 and 62 inside the portions 42a, 52a and 62a. Are provided with three forceps arms 44, 54, 64 with claws.

One end of one operation wire 45, 55, 65 that passes through the inner sheaths 42, 52, 62 is fixed to the proximal side of the forceps arms 44, 54, 64 with claws, respectively. . Then, the operation wires 45, 5
The other ends of the inner sheaths 5 and 65 extend from the proximal ends of the inner sheaths 42, 52 and 62.
Rings 46, 56, and 66, which are independently movable in the longitudinal direction, are fixed to 2, 52, and 62, respectively. Thus, by operating the rings 46, 56, 66, respectively, the operating wires 45, 55, 65
Is moved, for example, in the distal direction, and the forceps arm 4 with the claw is moved.
The gripping portions 41, 51, 61 are formed by projecting the 4, 54, 64 from the distal end surfaces of the inner sheaths 42, 52, 62 by a desired amount and expanding to correspond to the size of the cut portion.
Then, by moving the operation wires 45, 55, 65 toward the hand side, the expanded grip portions 41, 5 are expanded.
1, 61 can be closed.

The living tissue collecting tool 10 constructed as described above.
The operation of will be described. First, the forceps arms 44, 54, 64 with claws of the grasping forceps 40, 50, 60 are connected to the inner sheaths 42, 5.
2, 62 and the inner sheaths 42, 5
The insertion section 20 of the living tissue collecting tool 10 is inserted into a forceps channel of an endoscope (not shown) and guided to an excision section in a body cavity in a state in which the insertion sections 2 and 62 are housed inside the sheath 21. The distal end surface 22 of 20 faces the cutout. Here, in order to cause the inner sheath 42 of the first grasping forceps 40 to protrude from the distal end surface 22, the slider 43 is advanced with respect to the sheath 21 to bring the distal end surface of the inner sheath 42 close to the resection portion.

Next, by operating the ring 46 of the grasping forceps 40 so as to advance with respect to the slider 43, the operation wire 45 is moved toward the distal end, and the forceps arm 44 with the claw is projected from the inner sheath 42. Thus, the grip portion 41 expanded to a desired size is formed. Then, the expanded forceps arm with a claw 44 is brought into contact with the cut portion, and the ring 46 is retracted with respect to the slider 43 in this state. Then, the operation wire 45 is moved to the hand side, the clawed forceps arm 44 is gradually housed in the inner sheath 42, and the gripper 41 is closed, so that the gripper 41 is closed as shown in FIG. The resected specimen 71 is gripped.

Next, the biological tissue collecting tool 10 in a state where the resected specimen 71 is gripped by the grip portion 41 is guided to the next resection portion, and the distal end surface 22 of the insertion portion 20 is opposed to the resection portion.
Here, the slider 53 of the second grasping forceps 50 is connected to the sheath 2.
The other inner sheath 52 disposed inside the sheath 21 while being advanced with respect to 1 is projected from the distal end surface 22 of the insertion portion 20. Then, since the distal end portion 52a of the inner sheath 52 is curved outward, the resected specimen held forward and held by the holding portion 41 without contacting or interfering with the inner sheath 42 already protruding. It proceeds further forward than 71 and approaches the target resection.

In this state, the ring 56 of the second grasping forceps 50 is operated with respect to the slider 53 in the same manner as the operation of the first grasping forceps 40, and the operation wire 55 is moved toward the distal end side so that the claw is moved. The forceps arm 54 is protruded from the inner sheath 52 to form an expanded grip 51. Then, the expanded forceps arm with claw 54 is brought into contact with the cut portion, the ring 56 is retracted with respect to the slider 53, and the forceps arm with claw 54 is gradually housed inside the inner sheath 52. By closing the grip 51, the grip 5
1 holds the resected specimen 72.

Subsequently, the third grasping forceps 60 is
The gripping portion 61 grips the resected specimen 73 by operating the gripping forceps 40 and the second gripping forceps 50 in the same manner. Then, as shown in FIG. 4, the gripper 4 of the gripping forceps 40, 50, 60
With the resected specimens 71, 72, 73 held by the members 1, 51, 61, respectively, the living tissue collecting tool 10 is removed from the body cavity together with the endoscope (not shown) to collect three resected specimens.

The biological tissue collecting tool 10 is removed from the body cavity at the time when the resected specimens 71, 72, 73 are grasped by the grasping portions 41, 51, 61 of the grasping forceps 40, 50, 60 or when necessary. This is the time when the number of resected specimens is grasped, and the above-described operation is repeatedly performed until the required number of resected specimens are grasped by the grasping unit.

Further, in this embodiment, three gripping forceps are provided in the sheath, but may be more or less.

As described above, by disposing a plurality of grasping forceps in the sheath forming the insertion portion of the living tissue collecting tool, a plurality of resected specimens can be transferred to the endoscope one time regardless of the size. It can be recovered by insertion and removal.

Further, since a plurality of grasping forceps advance and retreat independently of the sheath forming the insertion portion, a plurality of resected specimens can be easily grasped.

Further, when the distal end portion of the inner sheath protrudes from the distal end surface of the insertion portion, the grasping forceps are formed to have outwardly curved shapes so as not to interfere with each other. When the grasping forceps is operated, it is possible to prevent the resected specimen from coming off due to contact with the resected specimen grasped by another grasping forceps.

FIGS. 5 and 6 relate to a second embodiment of the present invention. FIG. 5 is an explanatory view showing another configuration of the living tissue collecting tool, and FIG. 6 is a diagram illustrating a plurality of excision and collecting tools disposed in a sheath. It is a figure explaining an operation of a means.

As shown in FIG. 5, the biological tissue collecting tool 10A of the present embodiment comprises three forceps arms 4 with claws of the first embodiment.
The first grasping forceps 40, the second grasping forceps 50, and the third grasping forceps 40 having the grasping portions 41, 51, 61 composed of 4, 54, 64.
Of the inner sheaths 42, 52,
A funnel-shaped first expanding portion 81, a second expanding portion 82 and a third expanding portion 83 for adsorbing the cut portion are provided at the distal end of the inner sheath 42, and the proximal ends of the inner sheaths 42, 52, and 62 are provided. The cocks 84, 85, 86 are fixed to the
The suction unit 87 is connected to the pump 86.

Incidentally, the cocks 84, 85, 86 pass through the inner sheaths 42, 52, 62, and the respective expanding portions 8.
Airtightness is maintained up to 1, 82 and 83. Further, the first expanding portion 81, the second expanding portion 82, and the third expanding portion 83 are each formed into an outwardly curved shape so that the expanding portions do not interfere with each other. Is formed. Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals and description thereof will be omitted.

The living tissue collecting tool 10 constructed as described above
The operation of A will be described. First, in order to make the distal end surface 22 of the insertion portion 20 face the resection portion and bring the first expanding portion 81 close to the resection portion, the inner sheath 42 is advanced toward the resection portion,
The first expanding portion 81 provided at the distal end of the inner sheath 42 is brought into contact with the cut portion.

Next, the inner sheath 42 is sucked by the suction means 87.
Negative pressure inside. Then, the first expanding portion 81 is attracted to the cut portion. In this state, the resected specimen 71 is attracted to the first expanding portion 81 by pulling the inner sheath 42 back toward the user.

Next, the resected specimen 71 is placed in the first expanded portion 81.
The living tissue collecting tool 10A in the state of having been adsorbed is guided to the next excision unit, and the distal end surface 22 of the insertion unit 20 is opposed to the excision unit. Here, another inner sheath 52 provided with the second expanding portion 82 at the distal end provided in the sheath 21 is advanced toward the resection portion. Then, since the expanded portions are formed so as not to interfere with each other,
The second expanding portion 82 advances further forward than the resected specimen 71 that has already been adsorbed to the first expanding portion 81 and contacts the target resection portion. In this state, the first expanding portion 81
In the same manner as in the operation to, the inside of the inner sheath 52 is set to a negative pressure by the suction means 87, and the second expanding portion 82 is sucked to the resection portion,
The resected specimen 72 is sucked to the second expanding portion 82.

Subsequently, the third expanding portion 83 is brought into contact with another cut portion, and the first expanding portion 81 and the second expanding portion 8 are formed.
The resection specimen 73 is gripped by the third expanding portion 83 in the same manner as in step 2.

Then, as shown in FIG.
In a state where the resected specimens 71, 72, and 73 are gripped by the specimens 2 and 83, respectively, together with an endoscope (not shown), the biological tissue collecting tool 1
OA is removed from the body cavity, and the resected specimen is collected. Other operations are the same as those of the first embodiment.

As described above, the resected specimen is attracted to the expanding portion and collected, thereby preventing the resected specimen from being damaged.

Further, since the plurality of expanding portions independently advance and retreat with respect to the sheath, a plurality of resected specimens can be easily sucked.

Further, since the plurality of expanded portions are formed in a shape curved outwardly so as not to interfere with each other, the expanded portions are in contact with and attracted to other expanded portions. Dropping of the resected specimen can be prevented.

It should be noted that the present invention is not limited to only the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.

[Appendix] According to the above-described embodiment of the present invention, the following configuration can be obtained.

(1) A plurality of the same excision and retrieval means which slides in the longitudinal direction of the sheath and protrudes and retracts from the distal end surface of the sheath are provided inside the sheath inserted into the forceps channel of the endoscope. And a biological tissue collecting tool in which each excision and collecting means is independently slidable.

(2) The resection device described in Appendix 1, wherein the excision and collection means is composed of a plurality of forceps arms with claws disposed at the distal end in the sheath portion, and operation means fixed to the forceps arms with claws. Biological tissue collection tool.

(3) The living tissue collecting tool according to appendix 1, wherein the excision and collecting means comprises an expanding portion disposed at a distal end of the sheath portion and a suction device located at a hand side of the sheath portion. .

(4) The living tissue collecting tool according to any one of 1 to 3, wherein portions of the excision and collecting means exposed from the sheath portion are curved outward.

[0044]

As described above, according to the present invention, 1
It is possible to provide a biological tissue collecting tool that can collect a plurality of resected specimens regardless of size by multiple insertions and removals of the endoscope.

[Brief description of the drawings]

FIGS. 1 to 4 relate to a first embodiment of the present invention, and FIG. 1 is an explanatory view showing a schematic configuration of a biological tissue collecting tool.

FIGS. 2A and 2B are a front view and a side view illustrating a configuration of a plurality of grasping forceps disposed in a sheath and capable of protruding and retracting from the sheath. FIGS.

FIG. 3 is an explanatory view showing a state in which one grasping forceps protruding from a sheath is grasping a resected specimen.

FIG. 4 is an explanatory view showing a state in which a resected specimen is gripped by all gripping forceps.

FIG. 5 and FIG. 6 relate to a second embodiment of the present invention,
FIG. 5 is an explanatory view showing another configuration of the biological tissue collecting tool.

FIG. 6 is a view for explaining the operation of a plurality of excision and collection means provided in the sheath.

FIG. 7 is an explanatory view showing a configuration of a conventional foreign matter collecting forceps.

[Explanation of symbols]

 Reference Signs List 10 biological tissue collecting tool 21 sheath 40 first gripping forceps 50 second gripping forceps 60 third gripping forceps

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kou Kimura 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industrial Co., Ltd. (72) Minoru Shinozuka 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A plurality of the same excision and retrieval means which slides in the longitudinal direction of the sheath portion and protrudes and retracts from the distal end surface of the sheath portion are provided inside a sheath portion inserted into a forceps channel of an endoscope. A biological tissue recovery tool, wherein each of the excision and recovery means is independently slidable.