JP4726025B2 - End of treatment endoscope - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a distal end portion of a treatment endoscope having a treatment instrument protrusion.
[0002]
[Prior art]
One of the main uses of a treatment endoscope is to remove a polyp from the body and collect it.
[0003]
FIG. 4 schematically shows a distal end portion of a conventional treatment endoscope used for such an application, and includes a first treatment instrument projection port 11 for projecting a snare or the like for polypectomy, and a polyp collection. A second treatment instrument projection port 12 for projecting a basket or the like is disposed on the distal end surface 2a of the distal end main body 2 disposed at the distal end of the insertion portion 1 along with the observation window 3 and the like. .
[0004]
Reference numerals 11a and 12a denote treatment instrument insertion channels that lead to the treatment instrument protrusions 11 and 12, and 4 denotes an illumination window. In some cases, only one treatment tool protrusion is provided on the same surface as the observation window 3, and the snare and basket are protruded side by side from one treatment tool protrusion.
[0005]
[Problems to be solved by the invention]
However, in the case where a plurality of polyps are excised and collected by the conventional treatment endoscope as described above, when the first polyp 101 is held in the basket 30 as shown in FIG. Since 101 obstructs the observation visual field A, it becomes extremely difficult to perform the excision treatment for the second polyp 102 by the snare 20.
[0006]
If the basket 30 is extended long forward, a front observation visual field can be obtained to some extent, but there is a risk that the basket 30 may interfere with the excision treatment by the snare 20.
[0007]
Therefore, conventionally, there are many cases in which each time a polyp is excised, the endoscope is once removed from the patient, the polyp 101 is removed from the basket 30 outside the body, and then the endoscope is reinserted, which is very troublesome. It was.
[0008]
Therefore, an object of the present invention is to provide a distal end portion of a treatment endoscope that can continuously cut and collect a plurality of polyps without obstructing an observation visual field.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the distal end portion of the treatment endoscope of the present invention is treated at the distal end portion of the treatment endoscope in which at least the observation window and the treatment instrument protruding port are provided at the distal end of the insertion portion. The wall surface on which the tool protrusion is formed is provided at a position retracted from the observation window.
[0010]
In addition, if the distal end body arranged at the distal end of the insertion portion is formed in a stepped shape, the observation window is disposed on the projecting side surface of the step, and the treatment instrument projecting port is disposed on the retreat side surface, The above configuration can be realized.
[0011]
In addition, if a plurality of treatment tool protrusions are provided at the 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, the polypectomy treatment tool and the recovery treatment The tool can be protruded from separate treatment tool protrusions, so that the treatment operation can be easily performed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 schematically shows a distal end portion of a treatment endoscope according to a first embodiment of the present invention. A distal end surface 2a of a distal end portion body 2 connected to the distal end of a flexible insertion portion 1 is An observation window 3 and an illumination window 4 are arranged side by side. In addition, illustration of the air / water supply nozzle is omitted.
[0013]
The distal end portion body 2 is formed in a stepped shape at an intermediate portion, and a first treatment instrument that is an outlet of the first treatment instrument insertion channel 11a is formed on the distal end surface 2a of the distal end portion body 2 serving as a protruding end thereof. The protruding port 11 is arranged side by side with the observation window 3.
[0014]
On the other hand, the retreat side surface (retreat surface) 2b is formed by retreating, for example, about 5 to 20 mm rearward from the distal end surface 2a, and a second treatment instrument protrusion serving as an outlet of the second treatment instrument insertion channel 12a. The mouth 12 is disposed on the retracting surface 2b.
[0015]
When a plurality of polyps are excised and collected using the treatment endoscope of the embodiment configured as described above, the first polyp 101 excised as shown in FIG. It holds with the basket 30 protruded from the 2 treatment tool protrusion port 12, and draws it to the 2nd treatment tool protrusion port 12 vicinity.
[0016]
Then, the first polyp 101 retreats to a position that does not obstruct the observation field in front of the observation window 3, so that the second polyp 102 is projected from the first treatment instrument projection port 11 while observing. The snare 20 can be safely removed.
[0017]
Then, the second polyp 102 can be further captured by the basket 30, and the third and fourth polyps can be excised and recovered without removing the insertion portion 1 from the patient.
[0018]
FIG. 3 shows the distal end portion of the treatment endoscope according to the second embodiment of the present invention. This embodiment is different from the first embodiment in that only one treatment instrument protrusion 10 that is an outlet of the treatment instrument insertion channel 10a is provided, and the observation window 3 is the tip body 2. The treatment instrument protrusion 10 is disposed on the retracting surface 2b.
[0019]
Therefore, as shown in FIG. 3, the snare 20 and the basket 30 are projected side by side from the treatment instrument projecting port 10, so that the cut first polyp is captured by the basket 30 as in the first embodiment. In this state, the second polyp can be removed by the snare 20 so that the observation visual field from the observation window 3 is not obstructed.
[0020]
【The invention's effect】
According to the present invention, by providing the wall surface on which the treatment tool protrusion is formed at a position retracted from the observation window, the observation field of view is not obstructed by the removed polyp captured by the gripping tool such as a basket. Polyps can be cut and collected continuously.
[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 polyp excision and recovery treatment by 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 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 sectional view showing a state of polyp excision and recovery treatment by a conventional treatment endoscope.
[Explanation of symbols]
2 distal end body 2a distal end surface 2b retracting surface 3 observation window 10 treatment instrument projection 11 first treatment instrument projection 12 second treatment instrument projection 20 snare 30 basket

Claims (2)

In the distal end portion of the treatment endoscope in which at least the observation window and the treatment instrument protruding port are provided in the distal end portion main body arranged at the distal end of the insertion portion,
The distal end portion body is formed with a distal end surface and a retracted surface retracted rearward thereof facing forward, the observation window is disposed on the distal end surface, and the treatment instrument protrusion is disposed on the retracted surface. With
The shape of the distal end surface of the distal end portion body is formed in a substantially heart shape in which the vicinity of the center of the substantially half-moon-shaped chord portion as viewed from the front is recessed, and the distal end portion body between the distal end surface and the retraction surface The treatment instrument is characterized in that the cross-sectional shape of the treatment tool is formed in the substantially heart shape having no step with respect to the distal end surface, and the treatment instrument protruding port is disposed behind the position facing the hollow portion in the heart shape. The tip of the mirror. The treatment instrument projection port at the distal end portion main body is not provided with a plurality of, at least one of the treatment instrument projection port of which the tip of the medical treatment endoscope according to claim 1 Symbol placement are formed in the retraction surface .

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