JPS63143021A - Treatment tool inserting auxiliary jig - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to the insertion of a treatment tool used when feeding a small diameter, flexible, and long treatment tool such as forceps or a catheter into the insertion channel of an endoscope. Regarding assistive devices.

[Prior Art] Conventionally, this type of treatment instrument insertion aid has a cylindrical guide member (assistant main body) attached and fixed to the insertion opening of the insertion channel of the endoscope, and the treatment instrument insertion aid is attached to the guide member. A cylindrical slide member into which the tool is inserted is fitted, and once the treatment tool is gripped and pushed in by the slide member, the treatment tool is released and the slide member is returned repeatedly to insert and guide the treatment tool. It has become. Prior art examples of such insertion aids include those shown in Japanese Utility Model Application No. 101490/1983 and Japanese Utility Model Publication No. 52-5908.

[Problems to be Solved by the Invention] By the way, when treatment using an endoscope must be performed while securing the field of view through perfusion, such as in the urinary field, it is necessary to supply water through the above-mentioned channel. be. However, in order to pass the insertion part of the endoscope through the ureter,
The insertion portion cannot be made very thick. Therefore, it is necessary to use one channel as both a treatment instrument channel and a water supply channel.

However, since none of the conventional insertion aids has a liquid feeding mechanism that can reliably feed liquid to the channel, it has been difficult to secure a good field of view during treatment.

This invention was made based on the above circumstances, and its purpose is to provide a water supply mechanism that can reliably supply water to the insertion aid, thereby ensuring a good field of vision. The object of the present invention is to provide a tool insertion aid.

[Means and effects for solving the problems] In order to solve the above problems, the present invention provides an auxiliary tool main body, a through hole formed in the auxiliary tool main body through which a treatment tool is inserted, and this through hole. a slide member that is slidably provided on one end side and sends the treatment tool inserted through the through hole to the other end side of the auxiliary tool main body; a liquid feeding mouthpiece that is provided in communication with the through hole; A sealing member is provided to prevent the liquid sent from the liquid feeding mouthpiece into the through hole from flowing out from one end side of the through hole. The liquid can be fed from the liquid feeding spout, and at the same time, the liquid does not leak from unnecessary parts of the auxiliary tool main body.

[Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The treatment tool insertion aid shown in FIGS. 1 and 2 includes a first guide member 1 and a second guide member 2, which constitute a main body of the tool. A boss portion 3 is protruded from one end of the first guide member 1, and a connecting ring 4 is provided on the boss portion 3. This connecting ring 4 is adapted to be screwed into a base 6 of a treatment instrument insertion channel 5 provided in the operating section of the endoscope. Further, the first guide member 1 is provided with a first through hole 7 that passes through the first guide member 1 in its axial direction.
A first screw hole 8 communicates with the through hole 7 . This first
A liquid feeding cap 9 is screwed into the screw hole 8 .

Further, a second screw hole 11 is formed at the other end of the first guide member 1 . This second screw hole 11 has a male threaded portion 12 protruding from one end surface of the second guide member 2.
are screwed together. A slit 13a is provided at the center between this male threaded portion 12 and the bottom surface of the second screw hole 9.
A circular plate-shaped sealing member 13 having a cutout therein is clamped and fixed.

The second guide member 2 has a second guide member that penetrates in the axial direction.
A through hole 14 is bored therein. This second through hole 14 has a larger diameter than the first through hole 7 and is formed coaxially with the first through hole 7. A pipe-shaped slide member 15 is slidably inserted into the second through hole 14 .

A first protrusion 16 that comes into close contact with the inner circumferential surface of the second through hole 14 is protrudingly provided on the outer circumferential surface of one end of the slide member 15 inserted into the second through hole 14. A second protrusion 17 that closely contacts the outer circumferential surface of the slide member 15 is provided on the inner circumferential surface of the end of the through hole. Therefore, when the slide member 15 is slid in the extraction direction, the first protrusion 16 engages with the second protrusion 17 to prevent the slide member 15 from being extracted from the second through hole 14. It is designed to prevent it.

A flat chuck member 18 made of an elastic material such as rubber is attached to the protruding end of the slide member 15. This chuck member 18 is provided with a third through hole 19 that communicates with the second through hole 14, and this third through hole 19 can be crushed by pressing both sides of the chuck member 18. I can do it.

A small diameter, flexible and long treatment instrument 21 such as forceps or a catheter is inserted into the channel 5 of the endoscope through the third through hole 19. In other words, this treatment tool 21
5 through the slit 13a of the sealing member 13 in a liquid-tight manner, and then through the first through hole 7 to the channel 5.
passed through.

When sending the treatment instrument 21 inserted into the channel 5 in this way, after sliding the slide member 15 in the direction of pulling it out from the second through hole 14, the chuck member 1
8, grab the treatment instrument 21, and slide the slide part t41.
5 in the direction of insertion into the second through hole 14, the treatment instrument 21 can be inserted into the channel 5 while being prevented from buckling by the slide member 15.

Such insertion of the treatment tool 21 is performed under observation with an endoscope. Then, if the field of vision becomes cloudy,
The liquid is delivered by connecting and operating a syringe (not shown) to the syringe. The liquid sent out from this syringe passes through the channel 5 through the first through hole 7 formed in the first guide member 1.
Since it flows through the body cavity into the body cavity, it is possible to eliminate turbidity in the body cavity and ensure a good field of vision. During such liquid feeding, the liquid sent from the syringe to the first through hole 7 tends to flow to the second through hole 14 . However, since the boundary between the first through hole 7 and the second through hole 14 is blocked by the sealing member 13 through which the treatment instrument 21 is fluid-tightly inserted, the Liquid does not leak to the outside through the second through hole 14 and the internal space of the slide member 15.

FIG. 3 shows a second embodiment of the invention. In this embodiment, a V-groove 26 is formed on the inner peripheral surface of the first through hole 7 formed in the first guide member 1, and a sealing member 13 is formed in the V-groove 26.
A convex portion 27 formed on the outer circumferential surface of is elastically engaged. This seal member 13 is attached to a ring-shaped locking member 29 provided at the tip of the guide tube 28. A stopper 31 is externally fitted and fixed on the outer peripheral surface of the midway portion of the guide tube 28 . Furthermore, the stopper 3 of the guide tube 28
A connecting member 32 integrally provided with the slide member 15 is slidably provided on the rear end side of the slide member 15. A protrusion 33 is provided at the tip of the stopper 31, a step 34 is formed at the tip of the connecting member 32, and a spring 35 is provided between these for biasing the slide member 15 in the extraction direction. There is. Further, a protrusion 36 that protrudes radially inward is provided at the tip of the slide member 15, and this protrusion 36 engages with the protrusion 33 of the stopper 31 to allow the slide member 15 to be pulled out of the guide tube 28. is being prevented. Although not shown, a chuck member 18 similar to that of the first embodiment is connected to the rear end of the connecting member 32. Then, the treatment instrument 21 is inserted into the channel 5 from the inner space of the guide tube 28 through the seal member 13 in a fluid-tight manner.

According to the insertion aid having such a structure, the chuck member 1
8, grasp the treatment instrument 21, and slide the slide member 15 together with the connecting member 32 in the forward direction against the restoring force of the spring 35, the treatment instrument 21 can be inserted into the channel 5. . Once the slide member 15 is pushed in until the tip of the connecting member 32 contacts the stopper 31, when the chuck member 18 is released, the slide member 15 returns to its initial position by the restoring force of the spring 35. Therefore, since there is no need to perform any operation when returning the slide member 15, operability is good. Further, when a liquid is supplied from the liquid feeding mouthpiece 9, the liquid is prevented from flowing toward the second through hole 14 by the seal member 13, as in the first embodiment.

Furthermore, if the guide tube 28 is strongly pulled and the sealing member 13 is elastically deformed, the convex portion 27 becomes V? g
26, it can be removed together with the slide member 15 and the connecting member 32. Therefore, if the liquid-tight performance of the seal member 13 deteriorates,
The exchange can be easily performed.

FIG. 4 shows a third embodiment of the invention. In this embodiment, a first accommodating part 38 and a second accommodating part 39 that protrude in the radial direction are formed at the connection part between the first guide member 1 and the second guide member 2, and these A partition plate 41 is provided at the connecting portion, and the first through hole 7 and the second through hole 14 are separated by this partition plate 41. The partition plate 41 has a first opening that opens only in the direction of the first accommodating portion 38.
A check valve 42 is provided, and a liquid feeding mouthpiece 9 is provided with its axis horizontal on the side wall of the second guide member 2 forming the second housing portion 39 facing the first check valve 42. It is being A second check valve 43 that opens only in the direction of the second accommodating portion 39 is provided at the connecting end of the liquid feeding mouthpiece 9 .

Further, a first seal member 44 is provided at the bottom of the partition plate 41.
is provided.

On the other hand, a second seal member 45 is provided at the distal end of the slide member 15 slidably inserted into the second guide member 2 to close the distal opening thereof, and a second seal member 45 is provided on the outer circumferential surface of the slide member 15. A third sealing member 46 made of an O-ring is provided to maintain liquid tightness with the inner circumferential surface of the second through hole 14.

Then, the treatment instrument 21 is liquid-tightly passed from the inner space of the slide member 15 through slits (not shown) formed in the second and first seal members 45 and 44, and further through the first through hole 7.
channel 5 via. Note that the frictional resistance between the first seal member 44 and the treatment instrument 21 is set to be greater than the frictional resistance between the second seal member 45 and the treatment instrument 21.

According to the insertion aid having such a structure, the slide member 1
By sliding the handle 5, the treatment instrument 21 can be delivered in the same manner as in each of the above embodiments. In addition, when feeding a liquid, a syringe (not shown) is connected to the liquid feeding mouthpiece 9, and when the slide member 15 is pushed in, the inside of the second accommodating portion 39 is compressed. Then, the pressure causes the first check valve 42 to open and the second check valve 43 to close, so that the liquid in the second storage portion 39 passes through the first check valve 42 and flows into the first check valve 42. Flows into the through hole 7. Further, when the slide member 15 is moved forward in the extraction direction, the pressure inside the second housing portion 39 decreases, so the first check valve 42 is closed and the second check valve 43 is opened. Therefore, the liquid contained in the syringe connected to the liquid feeding mouthpiece 9 flows into the second accommodating portion 39 . Further, the liquid that has flowed into the second storage portion 39 is prevented from flowing out through the second through hole 14 by the second and third seal members 45 and 46. That is, according to the above structure, the slide member 1 can be moved without having to take the trouble of operating the syringe.
The liquid can be fed simply by inserting the treatment instrument 21 in step 5. Furthermore, when the slide member 15 is slid in the extraction direction, the first seal member 44 is thicker than the second seal member 45, but the friction resistance against the treatment instrument 21 is larger than the second seal member 45. There will be no omissions.

5 and 6 show a fourth embodiment of the invention. That is, in this embodiment, the first seal member 44 is provided at the connection portion between the first guide member 1 and the second guide member 2, and the second
This embodiment differs from the third embodiment in that a housing portion 51 to which a liquid feeding mouthpiece 9 is connected is formed in the guide member 2 of the embodiment. Also,
The first sealing member 44 is formed into a truncated cone shape as shown in FIG.
a is formed.

Even in such a structure, the liquid can be fed by sliding the slide member 15 without operating the syringe connected to the liquid feeding mouthpiece 9, as in the third embodiment.

〔Effect of the invention〕

As described above, according to the present invention, the treatment instrument body is connected to the liquid feeding mouthpiece that communicates with the through hole formed in the treatment instrument body through which the treatment instrument is inserted, and the liquid feeding mouth is fed from the liquid feeding mouthpiece. The sealing member prevents the liquid from flowing in directions other than the predetermined direction. Therefore, not only can the liquid be reliably fed using the through hole formed in the treatment instrument body, but also the sealing member can prevent the liquid from leaking into the liquid feeding hole. Also, the liquid feeding operation can be performed well.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an insertion aid showing a first embodiment of the present invention, FIG. 2 is a side view of the insertion aid, and FIG.
4 is a sectional view showing a third embodiment of the invention, FIG. 5 is a sectional view showing a fourth embodiment of the invention, and FIG. 6 is a sectional view showing a third embodiment of the invention. FIG. 3 is a perspective view of a seal member of FIG. 1... First guide member (auxiliary tool main body), 2... Second guide member (auxiliary tool main body), 7... First through hole,
9...Liquid feeding cap, 13...Sealing member, 14...
Second through hole, 15...Slide member, 21...Treatment instrument.

Claims (1)

[Claims] An auxiliary tool main body, a through hole formed in the auxiliary tool main body through which the treatment tool is inserted, and a through hole provided slidably at one end of the through hole, and the treatment tool inserted through the through hole is inserted into the auxiliary tool main body. A slide member for sending the liquid to the other end side, a liquid feeding mouthpiece provided in communication with the through hole, and a liquid feeding mouthpiece that prevents the liquid sent from the liquid feeding mouthpiece to the said through hole from flowing out from one end side of the said through hole. 1. A treatment instrument insertion aid comprising a sealing member for blocking.