JP2001231852A - Drainage tube for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage tube for an endoscope assuring locking operation for a long time with no deep insertion in error. SOLUTION: The drainage tube for the endoscope consisting of an elastic tube member 1 having at least a circularly curled portion close to one end has a slant cutout 4 formed on the outer periphery side of the curled portion of the tube member 1, which comes closer to the end side of the tube member 1 as tending inward from the outer face side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage tube for an endoscope which is placed endoscopically at a target site in a body for the purpose of discharging bodily fluids and the like.

[0002]

2. Description of the Related Art A drainage tube for an endoscope is basically a tube-shaped member, but is devised so as not to come out of a treatment position during an indwelling operation or during an indwelling for a long time thereafter. There is a need to.

FIG. 7 shows an example of a conventional drainage tube for an endoscope. A body fluid inlet 2 is formed at a distal end of a tubular member 1 formed linearly, and a body fluid inlet is formed at a rear end. An outlet 3 is formed.

[0004] In the vicinity of both ends of the tubular member 1, diagonal cuts 4 are formed which approach the end side from the outer surface side toward the inner side.
Of the tongue is raised outward to form a barbed projection 5 which acts as a stopper.

FIG. 8 shows another example of a conventional drainage tube for an endoscope, wherein a body fluid inlet 2 and a body fluid outlet 3 are provided.
The portions in the vicinity of both ends of the tubular member 1 made of a resilient member on which are formed are each formed by curling in an arc shape.

[0006] Therefore, when inserted into the target site for placement, the core is straightened through the inside of the core,
By pulling out the core while the tubular member 1 is inserted into the target site for about half the length, the tubular member 1 curls inside the target and acts as a stopper.

[0007]

However, as shown in FIG. 7, in the case where the barbed projections 5 are formed on the linear tube-shaped member 1, the barbed projections 5 increase with the elapse of the indwelling time. Often gradually returns to the closed state, does not function as a retaining member, and escapes from the target portion.

Further, as shown in FIG. 8, even when the elastic tubular member 1 is formed into a curled shape in an arc shape to prevent it from slipping out, it is erroneously inserted too deeply and the drainage is performed well. In some cases, it may not be able to be placed in a detained state, or may not be able to be removed from the placement position.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drainage tube for an endoscope which does not accidentally insert too deeply and which can reliably function for a long time.

[0010]

In order to achieve the above object, a drainage tube for an endoscope according to the present invention has an elastic tube-like member formed by curling at least a portion near one end in an arc shape. In the drainage tube for an endoscope, which is formed on the outer peripheral surface side of the curled portion of the tubular member, an oblique notch is formed which approaches the end side of the tubular member as going inward from the outer surface side. is there.

It is effective that the cut extends from the surface of the tubular member to about half of the diameter. In addition, if a plurality of cuts are formed in the curled portion on the distal end side of the tubular member, the check action is reliable, and the curl portion on the rear end side of the tubular member and the vicinity of the boundary between the straight portion are secured. It is preferable that the notch is formed as a position for preventing excessive insertion.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a drainage tube for an endoscope according to an embodiment of the present invention. A tubular member 1 is formed of a resilient tube material such as a silicone rubber tube, and both ends are tapered slightly. It is formed in a constricted shape.

A body fluid inlet 2 is formed at the distal end of the tubular member 1, and a body fluid outlet 3 is formed at the rear end. The bodily fluid inlet 2 and the bodily fluid outlet 3 each include an opening at both ends of the tubular member 1 and a hole formed in the side wall, but an appropriate opening may be formed according to the purpose.

The portions in the vicinity of both ends of the tubular member 1 are each formed in a shape of an arc and curled about two-thirds of a circle when no external force is applied. The curl is formed on the same plane in the same direction on the front end side and the rear end side, but the directions and sizes may be different on the front end side and the rear end side.

An oblique notch 4 is formed on the outer peripheral surface side of the curl portion on the distal end side of the tubular member 1 so as to approach the distal end of the tubular member 1 from the outer surface side toward the inner side.
Are formed at intervals. Each cut 4
It extends from the surface of the tubular member 1 to about half the diameter.

On the outer peripheral surface side of the curled portion on the rear end side of the tubular member 1, a diagonal notch 4 approaching the rear end of the tubular member 1 from the outer surface side toward the inner side is formed. It is formed near the boundary between the linear member 1 and the linear portion. This notch 4 is also used for the tubular member 1.
From the surface to about half of the diameter.

FIG. 2 shows a comparison between the case where the cuts 4 and 4 'are formed on the outer circumferential surface side and the case where the cuts 4 and 4' are formed on the inner circumferential surface side. Due to the curl, a force in the opening direction acts on the notch 4 formed on the outer peripheral surface side, and a closing force acts on the notch 4 ′ formed on the inner peripheral surface side. .

Accordingly, as shown in FIG. 1, the cuts 4 formed on the outer surface of the tubular member 1 open naturally, and the outer tongues protrude in a stab-like manner. The front-side barb 6 projecting from the portion serves as a stopper for preventing the tubular member 1 from being inserted into the target site, and the rear-side barb 7 projecting from the curl portion at the rear end has a tubular shape. The member 1 functions as a stopper for preventing the member 1 from being excessively inserted into the target portion.

FIGS. 3 to 5 show a state in which the drainage tube for an endoscope of the above embodiment is passed through the treatment tool insertion channel 51 of the ultrasonic endoscope 50 and is left in the body. The tubular member 1 is fitted on the distal end portion of a guide wire 8 having a needle-like distal end, and is pushed forward from a hand side by a pusher 9 made of a flexible tube.

As shown in FIG. 3, the tubular member 1
Is elastically deformed into a substantially straight shape when the guide wire 8 is passed therethrough, is pierced into the body wall 100 in this state, and is inserted into a target site 101 such as a pseudopustular pancreas. At that time, the back-side striated projection 7 collides with the surface of the body wall 100 to prevent excessive insertion.

When the tubular member 1 is inserted into the target portion 101 to a correct depth, the guide wire 8 is pulled back by pressing the pusher 9 as shown in FIG. At that time, the front-side striated projection 6 is caught in the target portion 101 and acts as a stopper for preventing the tubular member 1 from coming off.

Then, as shown in FIG. 5, by further pulling back the guide wire 8, the tubular member 1 is
Is placed in the target portion 101, and the drainage tube is placed in a state where the portion near the rear end is exposed to the front side from the body wall 100.

As a result, the body fluid in the target portion 101 is discharged to the outside through the inside of the tubular member 1, and at the same time, the front-side stab-like projection 6 acts as a retaining member, so that it is kept in a stable state for a long period of time. You.

FIG. 6 shows a state in which the drainage tube of the present invention is intubated from the duodenum 200 into the biliary tract 201 by using the endoscope 60. In addition to this, the present invention is applicable to endoscopes used for various purposes. It can be applied to a drainage tube for a mirror.

The present invention is not limited to the above embodiment. For example, an arc-shaped curl may be formed on one of the front end side and the rear end side of the drainage tube.

[0026]

According to the present invention, at least a portion near one end is curled in an arc shape on the outer peripheral surface side of the curled portion of the tubular member. The oblique notch approaching to the cutout ensures that the outer portion of the notch protrudes like a stab, and in the case of a stab at the rear end, acts as a stopper to prevent excessive insertion, and In the case of the stab-like projections, it effectively acts as a stopper for the drainage tube.

As a result, the drainage tube is not accidentally inserted too deep by mistake, and the retaining action works reliably for a long period of time, so that a stable indwelling state can be maintained and the body fluid can be reliably discharged.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a drainage tube for an endoscope according to an embodiment of the present invention.

FIG. 2 is a side view for explaining cuts in the embodiment of the present invention.

FIG. 3 is a schematic view showing a use state of the drainage tube for an endoscope according to the embodiment of the present invention.

FIG. 4 is a schematic view showing a use state of the drainage tube for an endoscope according to the embodiment of the present invention.

FIG. 5 is a schematic view showing a use state of the drainage tube for an endoscope according to the embodiment of the present invention.

FIG. 6 is a schematic view showing a different use state of the drainage tube for an endoscope according to the embodiment of the present invention.

FIG. 7 is a side sectional view of a first conventional drainage tube for an endoscope.

FIG. 8 is a side sectional view of a second conventional drainage tube for an endoscope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tubular member 2 Body fluid inflow port 3 Body fluid outflow port 4 Cut 6 Front striated projection 7 Rear striated projection

Claims (4)

[Claims] 1. An endoscope drainage tube comprising an elastic tube-shaped member formed by curling at least a portion near one end in an arc shape, wherein an outer peripheral surface side of a curled portion of the tube-shaped member is provided. A drainage tube for an endoscope, wherein an oblique cut is formed so as to approach the end of the tubular member from the outer surface toward the inner side. 2. The drainage tube for an endoscope according to claim 1, wherein the cut extends from the surface of the tubular member to about half of the diameter. 3. A plurality of cuts are formed in a curl portion on the distal end side of the tubular member.
The drainage tube for an endoscope according to the above. 4. The drainage tube for an endoscope according to claim 1, wherein a cut is formed near a boundary between the curled portion and the straight portion on the rear end side of the tubular member.