JP2001224554A - Endoscopic drainage tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscopic drainage tube easily confirmable of the insertion to a constriction part or the like in a proper depth and capable of being stayed in a proper state to ensure the draining. SOLUTION: This endoscopic drainage tube comprises body fluid inflow ports 2 and 4 formed on the tip side part of a tubular member and humor outflow ports 3 and 5 formed on the rear end side part thereof. In the drainage tube, indexes 6 and 7 for displaying the inserting depth proper range of the tubular member from the body wall surface are provided on the circumferential surface of the tubular member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope which is inserted endoscopically into a stenosis site for drainage and is left in place when the duct from the biliary tract to the duodenum becomes stenotic. It relates to a drainage tube.

[0002]

2. Description of the Related Art Generally, drainage tubes for endoscopes are
It is formed of a tubular member having elasticity as a whole, and a body fluid inlet is formed at a front end portion thereof, and a body fluid outlet is formed at a rear end portion thereof.

[0003] When inserted into a stenosis site,
The guide wire passed through the treatment instrument insertion channel of the endoscope is used as a guide and pushed into the stenosis site by a pusher (extrusion tube) formed of a long flexible tube.

[0004]

When the drainage tube is pushed into the stenosis site as described above, the observation screen of the endoscope shows an uninserted portion of the drainage tube inserted halfway into the stenosis site. Observed from behind.

However, when the drainage tube is viewed from the axial direction, it is difficult to visually check how much the drainage tube has been inserted into the stenosis, and the drainage tube is inserted too deeply or too deeply to discharge body fluid. Was not done well. This is not limited to the time of insertion into the stenosis site, but also applies to the case where the drainage tube is inserted into the body wall and indwelled.

Accordingly, the present invention provides an endoscope which can easily confirm whether or not a proper depth has been inserted into a stenosis or the like, and which can be placed in an appropriate state to reliably drain the liquid. It is an object to provide a drainage tube for use.

[0007]

In order to achieve the above object, a drainage tube for an endoscope according to the present invention has a body fluid inlet formed at a distal end portion of a tubular member and a body fluid inlet formed at a rear end portion. In the drainage tube for an endoscope having an outlet formed, an index for indicating an appropriate range of the insertion depth of the tubular member from the body wall surface is provided on the outer peripheral surface of the tubular member.

The tubular member may be formed of an elastic material, and at least one end of the tubular member may be curled in a natural state. In addition, a limit prediction index for indicating that the insertion depth of the tubular member from the body wall surface has approached the maximum of the appropriate range may be provided.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a state in which a drainage tube 1 for an endoscope according to a first embodiment of the present invention is mounted on an indwelling device (11, 12).

The drainage tube 1 is formed of a tube-shaped member made of a material having elasticity, such as a silicone rubber tube, and in a natural state, the distal end portion is half as shown by a two-dot chain line. It is formed in a shape that curls in an arc shape of a circle or more.

Body fluid inlets 2 and 4 (tip opening 2 and side opening 4) are formed at the distal end of drainage tube 1, and body fluid outlets 3 and 5 (tip opening 3 and side opening 4) are formed at the rear end. 5) is formed.

Reference numeral 11 denotes a guide wire inserted into a treatment tool insertion channel of an endoscope (not shown). The guide wire 11 is formed of, for example, a stranded stainless steel wire, and its entire length is at least twice the entire length of the treatment instrument insertion channel.

The drainage tube 1 is fitted on the distal end of a guide wire 11 so as to be able to advance and retreat in the axial direction.
Then, a pusher 12 (extruded tube) having a distal end surface abutting on the rear end surface of the drainage tube 1 is connected to the guide wire 11 so as to be able to advance and retreat in the axial direction with respect to the drainage tube 1.
It is fitted to.

The pusher 12 is formed of a slidable and hard flexible tube made of, for example, tetrafluoroethylene resin or the like, and its entire length is longer than the entire length of the treatment instrument insertion channel of the endoscope.

On the outer peripheral surface of the drainage tube 1, a minimum insertion position display index 6 and a maximum insertion position display for displaying an appropriate insertion depth range when the drainage tube 1 is inserted from the body wall surface to the back thereof. The index 7 is marked, for example, in a ring shape. The minimum insertion position display index 6 and the maximum insertion position display index 7 are colored in different colors, for example, blue and red.

The minimum insertion position display index 6 indicates that the insertion depth is insufficient when it is visible outside the body wall. It indicates that there is.

However, it is sufficient that the drainage tube 1 is provided with at least the maximum insertion position display index 7.
Also, a minimum insertion position display index 6 and a maximum insertion position display index 7
May be colored in a single color different from other portions.

At a position closer to the front end than the maximum insertion position display index 7 and near the maximum insertion position display index 7, a limit prediction index 8 for indicating that the insertion depth has approached the maximum of the appropriate range. Are, for example, marked in a ring shape. The limit prediction index 8 is colored yellow, for example.

FIG. 2 shows a state in which the pusher 12 is pushed from the proximal side and the drainage tube 1 is pushed out from the distal end of the guide wire 11, and the distal side of the drainage tube 1 is curled by its own elasticity. Return to the natural state.

When the drainage tube 1 thus constructed is to be placed endoscopically at the exit of the biliary tract,
First, the device shown in FIG. 1 is inserted into the treatment instrument insertion channel of the endoscope, and the guide wire 11 is fed into the biliary tract from the duodenum side.

Then, the drainage tube 1 is pushed into the biliary tract with the pusher 12 using the guide wire 11 as a guide. At this time, the indices 6, 7, and 8 attached to the drainage tube 1 are observed by the endoscope, so that the minimum insertion position display index 6 is sunk into the duodenal wall and the maximum insertion position display index 7 is not sunk. Then, the drainage tube 1 is pushed into the biliary tract.

Then, when the guide wire 11 is pulled back to the hand side, as shown in FIG.
Is separated from the guide wire 11 and the like, is placed in a state where it is inserted into the biliary tract 102 with an appropriate length, and the distal end portion of the drainage tube 1 curls in the biliary tract 102 to function as a stopper. Reference numeral 50 denotes a distal end portion of the endoscope inserted into the duodenum 101, and reference numeral 51 denotes a treatment tool insertion channel.

FIG. 4 shows a state in which the drainage tube 1 according to the second embodiment of the present invention is mounted on an indwelling device (21, 12), for example, with the tip inserted into the pancreas through the stomach wall. Used for purposes such as detention.

In this case, a flexible needle shaft 21 having a sharp tip is used in place of the guide wire 11.
Further, the rear end side portion of the drainage tube 1 remaining in the stomach is formed in a shape curled in a semicircular arc in a natural state similarly to the front end side. Other configurations are the same as those of the first embodiment.

FIG. 5 shows a drainage tube 1 according to a third embodiment of the present invention.
It is formed by a flexible tube that is straight in nature. In this case, the barbed projections 9 are protruded near both ends to prevent falling out of the indwelling state. Other configurations are the same as those of the first or second embodiment.

As described above, the present invention can be applied to drainage tubes for endoscopes having various shapes.

[0027]

According to the present invention, an index for indicating an appropriate range of the insertion depth of the tubular member from the surface of the body wall is provided on the outer peripheral surface of the tubular member. It can be easily confirmed on the observation screen of the endoscope whether or not the liquid has been inserted at an appropriate depth, and the drainage tube can be left in an appropriate state to reliably drain the liquid.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a state in which a drainage tube for an endoscope according to a first embodiment of the present invention is mounted on an indwelling device.

FIG. 2 is a side view showing a state in which the drainage tube for an endoscope according to the first embodiment of the present invention is pushed out of an indwelling device.

FIG. 3 is a schematic diagram showing a state immediately after the drainage tube for an endoscope according to the first embodiment of the present invention is placed.

FIG. 4 is an overall configuration diagram of a state in which a drainage tube for an endoscope according to a second embodiment of the present invention is mounted on an indwelling device.

FIG. 5 is a side view of a drainage tube for an endoscope according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage tube 2, 4 Body fluid inlet 3, 5 Body fluid outlet 6 Minimum insertion position display index 7 Maximum insertion position display index 8 Limit prediction index 11 Guide wire 12 Pusher 21 Needle shaft

Claims (3)

[Claims] 1. A drainage tube for an endoscope in which a body fluid inlet is formed at a distal end portion of a tubular member and a body fluid outlet is formed at a rear end portion of the tubular member. A drainage tube for an endoscope, wherein an index for indicating an appropriate insertion depth range is provided on an outer peripheral surface of the tubular member. 2. The drainage tube for an endoscope according to claim 1, wherein the tubular member is formed of a resilient material, and at least one end of the tubular member is curled in a natural state. . 3. A drainage tube for an endoscope, wherein a limit prediction indicator is provided for indicating that the insertion depth of the tubular member from the body wall surface has reached a maximum within an appropriate range. .