JP2002238835A - Distal end of endoscope for treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distal end of an endoscope for treatment that can continuously cut and recover a plurality of polyps without obstructing an observation visual field. SOLUTION: A wall surface 2b formed with a treatment instrument projecting port 12 is provided in a position retreated from an observation aperture 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end portion of a treatment endoscope having a treatment tool outlet.

[0002]

2. Description of the Related Art One of the main uses of a treatment endoscope is a treatment for removing and recovering a polyp from a body.

FIG. 4 schematically shows a distal end portion of a conventional treatment endoscope used for such a purpose, and a first treatment tool outlet 1 for projecting a snare or the like for polyp resection.
1 and a second treatment tool outlet 12 for projecting a polyp collection basket or the like are arranged on the distal end surface 2a of the distal end main body 2 disposed at the distal end of the insertion section 1 with the observation window 3 or the like. It is arranged in.

[0004] 11a, 12a is a treatment tool outlet 11,1
A treatment tool insertion channel leading to 2 and an illumination window 4.
In some cases, only one treatment tool outlet is provided on the same surface as the observation window 3, and the snare and the basket are projected side by side from one treatment tool outlet.

[0005]

However, when a plurality of polyps are to be excised and collected by the conventional treatment endoscope as described above, as shown in FIG. Is held in the basket 30, the polyp 1
Since 01 obstructs the observation field A, it is extremely difficult to perform the resection of the second polyp 102 by the snare 20.

[0006] If the basket 30 is extended long forward, it is possible to obtain a certain forward observation field of view.
There is a danger that the basket 30 may hinder the cutting procedure by the snare 20.

Conventionally, therefore, the endoscope is once removed from the patient every time one polyp is resected, and the endoscope is reinserted after removing the polyp 101 from the basket 30 outside the body in many cases, which is very troublesome. Had to work.

Accordingly, an object of the present invention is to provide a distal end portion of a medical treatment endoscope capable of continuously cutting and collecting a plurality of polyps without obstructing an observation visual field.

[0009]

In order to achieve the above object, a distal end of a treatment endoscope according to the present invention comprises a treatment endoscope having at least an observation window and a treatment instrument outlet at the distal end of an insertion portion. In the distal end portion of the endoscope, a wall surface on which a treatment tool outlet is formed is provided at a position retracted from an observation window.

The distal end main body disposed at the distal end of the insertion portion is formed in a stepped shape, an observation window is disposed on the protruding side surface of the step, and a treatment tool outlet is disposed on the retreat side surface. if,
The above configuration can be realized.

[0011] Further, if a plurality of treatment instrument protrusions are provided at the distal end of the insertion section, and at least one of the treatment tool protrusions is formed on a wall surface receding from the observation window, the treatment instrument for polyp resection can be used. The collection treatment tools can be made to protrude from separate treatment tool protrusion ports, and the treatment operation can be easily performed.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 schematically shows a distal end portion of a medical treatment endoscope according to a first embodiment of the present invention, in which a distal end surface 2a of a distal end main body 2 connected to a distal end of a flexible insertion portion 1 includes: The observation window 3 and the illumination window 4 are arranged side by side. The illustration of the air supply / water supply nozzle and the like is omitted.

The distal end body 2 is formed in a stepped shape at an intermediate portion. The distal end surface 2a of the distal end body 2 which is a protruding end of the distal end body 2 has a first treatment instrument insertion channel 11a as an outlet. Are disposed side by side with the observation window 3.

On the other hand, the retreat side surface (retreat surface) 2b is formed to retreat rearward from the tip end surface 2a by, for example, about 5 to 20 mm, and is a second outlet which is an outlet of the second treatment instrument insertion channel 12a. The treatment tool outlet 12 is disposed on the retreat surface 2b.

When a plurality of polyps are excised and collected by using the treatment endoscope of the embodiment configured as described above, as shown in FIG. 2, the first excised polyp is used. 101 is held by the basket 30 protruding from the second treatment tool outlet 12, and is drawn to the vicinity of the second treatment tool outlet 12.

Then, the first polyp 101 retreats to a position not obstructing the observation field of view in front of the observation window 3, so that the second polyp 102 is observed from the first treatment tool outlet 11 while observing the second polyp 102. The protruding snare 20 enables safe resection.

Then, the second polyp 102 is further captured by the basket 30, and the third and fourth polyp excision and collection procedures can be continuously performed without removing the insertion portion 1 from the patient. .

FIG. 3 shows the distal end of a medical treatment endoscope according to a second embodiment of the present invention. This embodiment is different from the first embodiment in that only one treatment tool outlet 10 which is an outlet of the treatment tool insertion channel 10a is provided. Is disposed on the distal end surface 2a, and the treatment instrument protrusion 10 is disposed on the retreat surface 2b.

Therefore, as shown in FIG. 3, the snare 20 and the basket 30 are projected side by side from the treatment tool outlet 10 so that the cut first polyp can be placed in the basket similarly to the first embodiment. In the state captured at 30, the observation field of view from the observation window 3 is not obstructed,
A second polyp resection procedure can be performed on the snare 20.

[0020]

According to the present invention, the observation field of view is obstructed by the cut-out polyp captured by the gripping device such as a basket, by providing the wall surface on which the treatment tool protrusion is formed at a position retracted from the observation window. Without cutting, a plurality of polyps can be continuously cut and collected.

[Brief description of the drawings]

FIG. 1 is a perspective view of a distal end portion of a treatment endoscope according to a first embodiment of the present invention.

FIG. 2 is a side cross-sectional view showing a state of a polyp resection / recovery procedure using the treatment endoscope according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a distal end portion of a medical treatment endoscope according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a distal end portion of a conventional treatment endoscope.

FIG. 5 is a side cross-sectional view showing a state of a polyp excision and collection procedure using a conventional treatment endoscope.

[Explanation of symbols]

 2 distal end body 2a distal end surface 2b evacuation surface 3 observation window 10 treatment tool outlet 11 first treatment tool outlet 12 second treatment tool outlet 20 snare 30 basket

Claims (3)

[Claims] 1. A distal end portion of a treatment endoscope provided with at least an observation window and a treatment instrument outlet at a distal end of an insertion portion, wherein a wall surface on which the treatment instrument outlet is formed is retreated from the observation window. A distal end portion of a treatment endoscope provided at a position. 2. A distal end body disposed at a distal end of the insertion portion is formed in a stepped shape, the observation window is disposed on a protruding surface of the step, and the treatment tool is disposed on a retreating surface. The distal end portion of the medical treatment endoscope according to claim 1, wherein the protrusion is disposed. 3. A plurality of the treatment tool protrusions are provided at a distal end of the insertion portion, and at least one of the treatment tool protrusions is formed on a wall surface retreated from the observation window. 3. A distal end portion of the treatment endoscope according to 2.