JP2000147390A - Endoscopic treatment implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an endoscopic treatment implement which is low in a production cost, is capable of executing washing without leakage in the spacing between the inside surface of a sheath and a manipulation wire and is hygienically excellent by making it possible to pour liquid from a liquid feed tube into the spacing between the sheath and the manipulation wire. SOLUTION: One end of the flexible liquid feed tube 50 is connected to an O-ring pressing screw 32. An injection cylinder 100 is mounted on the other end side of the liquid feed tube 50. When the washing liquid is extruded from the injection cylinder 100 toward the liquid feed tube 50, the washing liquid is sent into the spacing between the outer peripheral surface of a drive rod 1b and the O-ring pressing screw 32. Then, if the O-ring pressing screw 32 is set to the extent of not crushing the O-ring 34, the washing liquid is sent from the inside of a sheath base end mouthpiece 31 into the flexible sheath 3 and is delivered from the front end of the flexible sheath 3. Consequently, the overall length of the portions where the manipulation wires 1a and 1b pass including the spacing between the manipulation wire 1a and the flexible sheath 3 may be easily washed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment instrument for an endoscope in which an operation wire is inserted into a sheath so as to advance and retreat.

[0002]

2. Description of the Related Art In general, a treatment tool for an endoscope has an operation wire which is movably inserted into a sheath which is inserted into and removed from a treatment tool insertion channel of the endoscope.

When such a treatment tool is inserted into the treatment tool insertion channel of the endoscope, the pressure in the body cavity is prevented from leaking through the gap between the inner surface of the sheath and the operation wire. It is desirable. In addition, it is desirable to clean the inside of the gap after using the treatment tool.

[0004] FIG. 7 shows a conventional endoscope treatment instrument capable of performing such an operation.
An exterior pipe 92 is fitted and fixed to the base end portion of the base for preventing hip breakage.

[0005] An injection cylinder 95 to which a syringe or the like can be connected is branched and protruded from a base end base 94 of a sheath 93 which is detachably provided to the operation section. An O-ring 96 is mounted on the sheath base cap 94.

With this configuration, if a plug 97 is attached to the injection tube 95 when using the treatment tool, the gap between the inner surface of the sheath 93 and the operation wire 91 and the outside air are shielded by the O-ring 96. If the washing liquid is injected from the injection cylinder 95 by removing the stopper 97 after use,
The gap between the inner surface of the sheath 93 and the operation wire 91 can be cleaned.

[0007]

However, it is very costly to manufacture the sheath base die 94 having the injection tube 95 protruding by single-piece cutting, and a mold is required for molding. Therefore, a large amount of cost is required for a small remodeling and the like frequently performed in the treatment tool for an endoscope. At the time of cleaning, the sheath base end cap 94 and O
There is also a drawback that the space between the ring 96 and the ring 96 cannot be cleaned and is contaminated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sanitary treatment instrument which is low in manufacturing cost and which can clean the gap between the inner surface of the sheath and the operation wire without leakage. And

[0009]

In order to achieve the above-mentioned object, an endoscope treatment tool according to the present invention is provided with an operation wire for allowing an operating wire to be inserted in the axial direction so as to be able to advance and retreat, and for operating the operating wire in a retractable manner. A sheath whose portion is detachably connected to the base end, and an elasticity which has an inner diameter larger than the outer diameter of the operation wire and is attached to the mouth of the base end of the sheath so as to surround the operation wire. An O-ring, and an O-ring which is screwed and attached to the base end of the sheath so that a state in which the operation wire is loosely inserted into the axial position and the state in which the O-ring is crushed in the axial direction and a state where the O-ring is not crushed can be selected. A pressing member, and a liquid supply pipe that is connectable / disconnectable at a rear end side of the O-ring pressing member in a state where the sheath is detached from the operation unit, and the sheath is detached from the operation unit. Sometimes O By attaching the liquid feed pipe to the O-ring pressing member in a state where the ring pressing member does not crush the O-ring, the liquid can be flowed from the liquid feed pipe into a gap between the sheath and the operation wire. It is characterized by the following.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a biopsy forceps which is one of the treatment tools for an endoscope. An operation unit 10 is attached to and detached from a proximal end of a flexible sheath 3 inserted into and removed from a treatment tool insertion channel of the endoscope. They are freely connected.

The operating wire 10 is inserted into the flexible sheath 3 so as to be able to advance and retreat in the axial direction over the entire length thereof. The forceps cup 2 can be opened and closed remotely.

FIG. 3 shows an operation unit 10, and a ring-shaped finger hook 12 for engaging a thumb of an operator's hand is attached to a proximal end of an operation unit main body 11 formed in an elongated rod shape. A thread wound finger hook 13 for engaging the index finger and the middle finger is slidably attached along the operation section main body 11.

A slot 14 formed in the operating section main body 11 to be elongated in the axial direction has a wire connection seat 15 fixed to the pin-shaped finger hook 13 and moved together with the pin-shaped finger hook 13.
Are slidably disposed in the axial direction.

A drive rod 1b is fixedly connected to the base end of the operation wire 1a inserted through the flexible sheath 3 and forms an operation wire together with the operation wire 1a. It is inserted into the connection seat 15 and fixed with a manual lock screw 16. Therefore, the connection between the drive rod 1b and the wire connection seat 15 can be arbitrarily released by loosening the manual lock screw 16.

The sheath connecting member 17 attached to the distal end portion of the operation section main body 11 is formed of a plastic material, and is engaged and disengaged with the concave portion 311 of the sheath proximal end base 31 attached to the proximal end of the flexible sheath 3. Engaging piece portion 171
Are formed at the inner position.

The projecting piece 172 formed at a position outside the engaging piece 171 is rotated as shown in FIG. 4B by rotating a cam cylinder 18 rotatably mounted on an outer periphery thereof around an axis. As shown, the engagement piece 171 is pushed inward.
Is engaged with the recess 311, whereby the sheath base end cap 3 is engaged.
1 is connected to the operation unit 10 so as not to come off.

Then, when the cam cylinder 18 is returned to its original position, the engagement piece 171 returns to the state of being detached from the recess 311 by its own elasticity as shown in FIG. The operation unit 10 can be removed.

FIG. 5 shows the proximal end portion of the flexible sheath 3 detached from the operating section 10. A through hole through which the drive rod 1b is loosely inserted is formed at an axial position of the sheath base end cap 31, and the flexible sheath 3 is connected to a distal end portion of the sheath base end base 31.

Reference numeral 4 denotes a case where the flexible sheath 3 is a sheath base end cap 3.
This is a buckling prevention tube for preventing buckling due to sharp bending near the connecting portion with the first tube. The operation wire 1a and the drive rod 1b are connected at an inner portion of the sheath base end cap 31.

The flexible sheath 3 is a tightly wound coil pipe 3a formed by tightly winding a stainless steel wire with a fixed diameter.
The heat-shrinkable tube 3b is water-tightly adhered and covered over the entire length.

An O-ring 34 made of a resilient rubber material (for example, silicone rubber) is attached to the outer base of the base end cap 31 from which the drive rod 1b projects so as to surround the drive rod 1b. ing.

The O-ring 34 has an inner diameter larger than the outer diameter of the driving rod 1b in its natural state as shown in FIG. It is arranged in a groove 312 formed on the end face. However, the groove 312 is formed so shallow that the side surface of the O-ring 34 protrudes from the end surface of the sheath base end cap 31.

Reference numeral 32 denotes an O-ring pressing screw for crushing the O-ring 34 in the axial direction.
1 is joined to a female screw cylinder 32a which is screwed with a male screw part formed on the outer peripheral surface of the protruding end portion to form an integral part.

Therefore, by rotating the O-ring pressing screw 32, as shown in FIG. 5, the O-ring 34 can be crushed at the tip end surface of the O-ring pressing screw 32, Will swell inward.

As a result, the O-ring 34 is
Is pressed against the outer peripheral surface of the endoscope, and the portion is sealed. If the treatment instrument is inserted into the treatment instrument insertion channel of the endoscope and used in this state, the flexible sheath 3 and the operation wire (that is, the operation wire) are used. It is possible to prevent the pressure in the body cavity from leaking from the gap between the driving rod 1a and the driving rod 1b). Also, O
By adjusting the crush amount of the O-ring 34 with the ring pressing screw 32, the amount of operating force can be arbitrarily adjusted to some extent.

The outer surface of the O-ring pressing screw 32 is formed in a smooth circumferential surface. Therefore, after using the treatment tool, the operation unit 10 is detached from the flexible sheath 3, and then, as shown in FIG. Can be connected. The connected liquid feeding tube 50 can be removed from the O-ring pressing screw 32.

At the other end of the liquid feeding tube 50, the syringe 10
When the cleaning liquid or the like is pushed out from the injection cylinder 100 to the liquid feeding tube 50, the cleaning liquid is sent to the gap between the outer peripheral surface of the drive rod 1b and the O-ring pressing screw 32.

Therefore, if the O-ring pressing screw 32 is set so that the O-ring 34 is not crushed,
Since there is a gap between the ring 34 and the outer peripheral surface of the driving rod 1b, the cleaning liquid is sent from the inside of the sheath base end cap 31 to the inside of the flexible sheath 3 and sent out from the distal end of the flexible sheath 3.

As a result, the portion where the operation wires 1a and 1b pass, including the gap between the operation wire 1a and the flexible sheath 3, can be easily washed over the entire length.
The O-ring 34 can be freely detached and replaced by loosening the O-ring pressing screw 32.

The present invention is not limited to the above embodiment. For example, the present invention can be applied to various endoscope treatment tools other than biopsy forceps.

[0031]

According to the present invention, the O-ring pressing member is
By attaching the liquid feed pipe to the O-ring pressing member in a state where the ring is not crushed, and pouring the cleaning liquid from the liquid feed pipe into the gap between the sheath and the operation wire, the portion where the operation wire passes is easily extended over the entire length. It can be cleaned, has a simple structure, and has no manufacturing cost.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view of a proximal end portion of a sheath in a cleaning state after use of an endoscope treatment tool according to an embodiment of the present invention.

FIG. 2 is a side view showing the overall configuration of the endoscope treatment tool according to the embodiment of the present invention.

FIG. 3 is a side sectional view of an operation unit of the treatment tool for an endoscope according to the embodiment of the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3 of the embodiment of the present invention.

FIG. 5 is a side sectional view of a proximal end portion of a sheath of the endoscope treatment tool according to the embodiment of the present invention.

FIG. 6 is an enlarged side sectional view of a proximal end portion of a sheath of the endoscope treatment tool according to the embodiment of the present invention.

FIG. 7 is a side sectional view of a proximal end portion of a sheath of a conventional endoscope treatment tool.

[Explanation of symbols]

 1a Operation wire (operation wire) 1b Driving rod (operation wire) 3 Flexible sheath 3a Closely wound coil pipe 3b Heat shrinkable tube 10 Operation unit 31 Sheath base end cap 32 O-ring pressing screw (O-ring pressing member) 34 O-ring 50 Liquid feeding tube 100 Syringe

Claims (1)

[Claims] An operating wire is inserted through the operating wire so as to be able to advance and retreat in the axial direction, and an operating portion for operating the operating wire is removably connected to a base end thereof. The sheath is larger than the outer diameter of the operating wire. An elastic O-ring having an inner diameter and mounted around the mouth of the proximal end of the sheath so as to surround the operation wire, and the operation wire is loosely inserted at an axial position so that the O-ring extends in the axial direction; An O-ring pressing member screwed and attached to the base end of the sheath to selectively squeeze a state between the O-ring pressing member and the O-ring pressing member when the sheath is detached from the operation unit. A liquid supply pipe that is connectable / disconnectable at an end side, and wherein the O-ring pressing member does not crush the O-ring when the sheath is detached from the operation unit; A treatment tool for an endoscope, wherein a liquid is supplied from the liquid supply tube to a gap between the sheath and the operation wire by attaching the liquid supply tube to a pressing member.