JP2001149309A - Auxiliary tool for inserting endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary tool for inserting an endoscope to be used with the passing resistance and the sealing level in the most preferable condition even if the size of the outer diameter of a flexible insertion part of a baby scope to be used is changed. SOLUTION: An O-ring 39 made of an elastic material is disposed in the passage of the flexible insertion part 21 of the baby scope 20 for the baby scope 20 to pass through, and O-ring compressing mechanisms 31 and 37 are mounted for compressing the O-ring 39 by an appropriate quantity to change the size of the inner diameter of the O-ring 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope for preventing insertion of a flexible insertion portion of a baby scope inserted into a guide channel of a mother scope with a small radius of curvature in front of an entrance of the guide channel. Regarding assistive devices.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional insertion assisting device 30 in an axial position of an insertion assisting device 30 made of a resilient member protrudingly attached to an insertion mouthpiece 12 of a guide channel 11 of a mother scope. The baby scope 20 has a baby scope passage hole 32 having a diameter such that the flexible insertion portion 21 of the baby scope 20 is loosely inserted.

In addition, at the position near the inner end of the baby scope passage hole 32, there is formed a leaky member formed of an annular thin elastic member having an inner diameter slightly smaller than the outer diameter of the flexible insertion portion 21 of the baby scope. The stop valve 33 is formed, and the leak stop valve 33 is in close contact with the outer peripheral surface of the flexible insertion portion 21 to prevent spurting liquid from flowing out of the body cavity passing through the guide channel 11. ing.

[0004]

However, when the above configuration is adopted, the degree of close contact with the leak stop valve 33 changes due to the difference in the outer diameter of the flexible insertion portion 21 of the baby scope used. If the flexible insertion portion 21 is too thick, the passage resistance increases and insertion / removal becomes difficult, and if the flexible insertion portion 21 is too thin, the tight contact with the leak prevention valve 33 is poor, and waste liquid leakage occurs. Resulting in.

[0005] Therefore, the present invention provides an endoscope insertion aid which can be used with the most suitable condition of the passage resistance and the seal even if the outer diameter of the flexible insertion portion of the baby scope used changes. The purpose is to provide tools.

[0006]

In order to achieve the above object, an endoscope insertion aid of the present invention comprises a flexible insertion portion of a baby scope inserted into a guide channel of a mother scope. In order to prevent bending with a small radius of curvature in the foreground, the endoscope insertion aid protruding from the guide channel entrance of the mother scope so that the flexible insertion portion of the baby scope passes therethrough, the baby scope The O-ring made of a resilient member is disposed in the passage of the flexible insertion portion so that the baby scope passes therethrough, and the O-ring can be crushed by an appropriate amount so that the inner diameter of the O-ring changes. A ring compression mechanism is provided.

[0007]

Embodiments of the present invention will be described with reference to the drawings. FIG. 3 shows a state in which the mother scope 10 and the baby scope 20 are used in combination. The flexible insertion portion 21 of the baby scope 20 is inserted into the guide channel 11 of the mother scope 10, and the baby scope 20 is moved. Tip portion 21a of the flexible insertion portion 21
Project from the distal end of the guide channel 11 located at the distal end of the insertion section of the mother scope 10.

[0008] Guide channel 1 of mother scope 10
An insertion assisting tool 30 for preventing the flexible insertion portion 21 of the baby scope 20 from bending with a small radius of curvature in front of the insertion mouthpiece 12 provided at the entrance of the first projection. Attached to the state.

FIG. 1 and FIG. 2 are enlarged cross-sectional views of the portion. FIG. 1 shows a state in which a baby scope 20 having a large diameter of a flexible insertion portion 21 is inserted, and FIG.
This shows a state in which the baby scope 20 having a smaller diameter of the flexible insertion portion 21 is inserted, and the insertion mouthpiece 12 of the mother scope 10 is formed into, for example, a male luer lock mouthpiece, and an entrance portion of the guide channel 11. It is projected.

The elastic deformation portion 30a of the insertion aid 30 is formed of elastic rubber, and is formed in a tapered cylindrical shape whose outer diameter gradually decreases toward the front. The baby scope passage hole 32 formed at the axial position has a diameter such that the flexible insertion portion 21 of the baby scope 20 is loosely inserted.

Therefore, the flexible insertion portion 21 of the baby scope 20 inserted from the baby scope passage hole 32 into the guide channel 11 of the mother scope 10 gradually becomes elastically deformable portion 30a when an external force in the bending direction is applied. Bends smoothly and does not bend with a small radius of curvature.

An intermediate base 37 made of a rigid body is integrally formed at the base end of the elastically deformable portion 30a, and the engagement base 31 formed into a female luer lock base and the middle base 37 are screwed and connected. I have.

[0013] Therefore, by disengaging the engaging base 31 with the insertion base 12 of the mother scope 10, the insertion assisting tool 30 can be fixed / released with respect to the insertion base 12.

The middle base 37 and the engagement base 31 have wall surfaces 41, 4 opposed to each other in a direction perpendicular to the axis.
2 is formed in an annular shape, and between its wall surfaces 41 and 42,
An O-ring 39 for sealing made of an elastic member is arranged.

The O-ring 39 is in close contact with the outer peripheral surface of the flexible insertion portion 21 of the baby scope 20, thereby preventing the sewage from flowing through the guide channel 11 from the distal end side.

The inner diameter of the O-ring 39 is substantially the same as the diameter of the baby scope passage hole 32 in a natural state where no external force is applied, and the outer diameter is a size such that it contacts the adjacent outer wall surface 43. Is formed. The outer wall surface 43
Is a part of the middle base 37 in this embodiment, but may be formed by a part of the engagement base 31.

The insertion assisting device 30 configured as described above is
The middle base 3 together with the elastically deformable portion 30a with respect to the engagement base 31
When the screw 7 is screwed, the distance between the wall surface 41 and the wall surface 42 sandwiching the O-ring 39 changes. When the interval is reduced, the elastic O-ring 39 is crushed, and the O-ring 3
9 is deformed so as to protrude inward, which is the only free space, and the inner diameter is reduced.

Therefore, the inner diameter of the O-ring 39 is adjusted in accordance with the thickness of the flexible insertion portion 21 of the baby scope 20 passed through the baby scope passage hole 32. For example, as shown in FIG. When the flexible insertion portion 21 is inserted, the inner diameter of the O-ring 39 is not changed, and when the thin flexible insertion portion 21 is inserted as shown in FIG. The inner diameter can be reduced.

In this manner, the degree of close contact of the O-ring 39 with the outer peripheral surface of the flexible insertion portion 21 of the baby scope 20 can be determined within a range in which the waste liquid transmitted from the distal end does not squirt.
The passage resistance of the flexible insertion portion 21 can be appropriately adjusted to a state where it is the smallest.

[0020]

According to the present invention, an O-ring made of an elastic member is disposed in the passage of the flexible insertion portion of the baby scope so that the baby scope passes therethrough, and the inner diameter of the O-ring is changed. The O-ring compression mechanism that can be crushed by an appropriate amount is provided so that even if the outer diameter of the flexible insertion portion of the used baby scope changes, the inner diameter of the O-ring is appropriately adjusted. It can be used with the passage resistance and the degree of sealing being most preferable.

[Brief description of the drawings]

FIG. 1 is a front cross-sectional view of a state in which a baby scope having a large diameter of a flexible insertion portion is inserted into an endoscope insertion aid according to an embodiment of the present invention.

FIG. 2 is a front cross-sectional view showing a state in which a baby scope having a small diameter of a flexible insertion portion is inserted into the endoscope insertion aid according to the embodiment of the present invention.

FIG. 3 is an external view of a mother scope and a baby scope using the insertion aid according to the embodiment of the present invention in a used state.

FIG. 4 is a front sectional view of a conventional endoscope insertion aid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mother scope 11 Guide channel 12 Insert base 20 Baby scope 21 Flexible insertion part 30 Insertion auxiliary tool 31 Engagement base 32 Baby scope passage hole 37 Middle base 39 O-ring 41, 42 Wall surface 43 Outer wall surface

Claims (1)

[Claims] The flexible insertion of the baby scope is prevented in order to prevent the flexible insertion portion of the baby scope inserted into the guide channel of the mother scope from bending with a small radius of curvature before the entrance of the guide channel. An endoscope insertion aid protruding and attached to an entrance of a guide channel of the mother scope so that a portion passes therethrough, wherein an O-ring made of an elastic member is provided in a passage of a flexible insertion portion of the baby scope. An endoscope insertion assist, comprising an O-ring compression mechanism arranged so that the baby scope passes therethrough and an O-ring compression mechanism capable of crushing the O-ring by an appropriate amount so that the inner diameter of the O-ring changes. Utensils.