JP2008206559A - Tip part of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tip part of an endoscope, wherein a tip hood formed of an elastic material is not largely deformed when pressed to a mucosal surface even when a through-hole formed on the sidewall part of the tip hood is formed in such a size that liquid sufficiently passes through. <P>SOLUTION: In the tip part of the endoscope, the tip hood 10 formed of the elastic material into a roughly cylindrical shape and provided with the through-hole 11 formed on the sidewall part is freely detachably attached to the outer peripheral part of a tip main body 2 in the state of projecting to the front from the tip face 2a of the tip main body 2 with an observation window 3 or the like arranged on the tip face 2a. The through-hole 11 is formed at a position over the front and back of the tip face 2a of the tip main body 2 in a state in which the tip hood 10 is fitted to the tip main body 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a distal end portion of an endoscope.

  Some of the front-end endoscopes are provided with a front-end hood for maintaining a certain distance between the observation window and the observation target mucous membrane. Such a tip hood is formed in a substantially cylindrical shape with a resilient material that does not damage the mucous membrane of the body, and is detachable from the outer periphery of the tip body so that it protrudes forward from the tip surface of the tip body. Is attached.

However, if water or other liquid accumulates in the tip hood, it obstructs endoscopic observation. If the tip hood is pressed against the mucous membrane and a suction operation is performed, the tip hood is strongly sucked against the mucosal surface, which may hinder observation. Therefore, a through hole is formed in the side wall portion of the tip hood so that such a problem does not occur (for example, Patent Documents 1 and 2).
Actual Kosho 59-15613, Fig. 2 JP 2002-263055 A

  FIG. 6 shows a state in which the distal end hood 92 is removed from the distal end portion main body 91 at the distal end portion of the conventional endoscope. An observation window 93, an illumination window 94, and the like are provided on the distal end surface 91a of the distal end portion main body 91. A tip hood 92 that is arranged and formed in a substantially cylindrical shape by a resilient material and has a through hole 95 formed in a side wall portion is detachably provided on the tip portion main body 91.

  FIG. 7 shows a state in which the tip hood 92 is attached to the outer peripheral portion of the tip portion main body 91, and the tip of the tip hood 92 is projected forward from the tip surface 91 a of the tip portion main body 91. Accordingly, a certain distance can be maintained between the observation window 93 and the observation target mucous membrane, and the occurrence of the above-described problems can be prevented by allowing fluid such as air or water to pass through the through holes 95.

  However, since the entire through hole 95 is formed in a state of being located in front of the front end surface 91a of the front end portion main body 91, if the through hole 95 is formed large enough to allow liquid to pass through, the waist of the front end hood 92 is When it becomes weak and the tip hood 92 is pressed against the mucous membrane, it is greatly deformed and the usability becomes very poor. However, if the through-holes 95 are formed small, the liquid cannot sufficiently pass therethrough and problems such as the retention of the liquid in the tip hood 92 occur.

  In the present invention, the tip hood formed of a resilient material is greatly pressed against the mucosal surface even if the liquid is sufficiently sized to pass through the through hole formed in the side wall portion of the tip hood. An object is to provide a distal end portion of an endoscope that is not deformed.

  In order to achieve the above object, the distal end portion of the endoscope of the present invention has a distal end hood that is formed in a substantially cylindrical shape with a resilient material and has a through hole in the side wall portion, and an observation window on the distal end surface. In the distal end portion of the endoscope that is detachably attached to the outer peripheral portion of the distal end main body so as to protrude forward from the distal end surface of the distal end portion main body, etc., the distal end hood In a state of being attached to the front end portion, it is formed at a position straddling the front and back of the front end surface of the front end portion main body.

  In addition, in the state where the tip hood is attached to the tip portion main body, an approximately half area of the through hole may be located behind the tip surface of the tip portion main body, and an area more than half of the through hole is the tip portion main body. You may be located behind the front end surface of.

  According to the present invention, the through hole in the side wall portion of the tip hood is formed at a position straddling the front and back of the tip surface of the tip portion main body in a state where the tip hood is attached to the tip portion main body. Even if it is formed to have a size that passes sufficiently, it does not deform significantly when the tip hood formed of an elastic material is pressed against the mucosal surface.

  The tip hood, which is formed in a substantially cylindrical shape with a resilient material and has a through hole in the side wall portion, projects forward from the tip surface of the tip portion body in which an observation window or the like is arranged on the tip surface. In the distal end of the endoscope that is detachably attached to the outer periphery of the distal end main body, a through hole is formed at a position across the front and rear surfaces of the distal end main body when the distal end hood is attached to the distal end main body. To do.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 2 shows a state in which the distal end hood 10 is removed from the distal end of the insertion portion 1 of the endoscope. The observation window 3 is formed on the distal end surface 2 a of the distal end portion main body 2 connected to the most distal end portion of the insertion portion 1. The illumination window 4 and the suction port (cum treatment tool projection port) 5 are arranged side by side facing forward. A portion 2b near the rear end of the outer periphery of the distal end main body 2 is formed to have a slightly small diameter so as to prevent it from coming off when the distal end hood 10 is engaged.

  The tip hood 10 is formed in a substantially cylindrical shape by a rubber material having a high elasticity that does not damage the mucous membrane of the body, and a plurality of (for example, 3 to 4) through holes 11 are formed in the side wall portion thereof. ing. However, there may be one through hole 11. In addition, although the through-hole 11 of the present embodiment is formed in a circular shape, it may be a rectangle or other shapes.

  The tip hood 10 is elastically deformed and attached to the outer peripheral portion of the tip end body 2 so that the tip edge 10a protrudes forward from the tip face 2a of the tip end body 2 as shown in FIGS. Thus, the distance between the tip edge 10a of the tip hood 10 and the observation window 3 is maintained at a predetermined interval. Further, the tip hood 10 can be elastically deformed and detached from the tip portion main body 2. FIG. 1 shows cross-sections and the like at different positions so that they can be understood from one drawing.

  As clearly shown in FIG. 1, the through hole 11 has a side wall portion of the tip hood 10 so as to straddle the front and rear surfaces 2 a of the tip body 2 when the tip hood 10 is attached to the tip body 2. In this embodiment, approximately half the area of the through hole 11 is located behind (to the right in the drawing) the tip surface 2a of the tip body 2.

  As a result, when the tip edge 10a of the tip hood 10 formed of a resilient material is pressed against the mucosal surface, the tip hood 10 is not greatly deformed, and a sufficient amount of liquid passes through the through hole 11. Can be formed.

  This can be clearly understood when compared with FIGS. 4 and 5 which are reference views, and as shown in FIG. 4, the through-hole 11 is completely blocked behind the distal end surface 2 a of the distal end body 2. Then, the cross-sectional area through which the fluid passes is reduced and the flow of water and other liquids is hindered. As shown in FIG. 5, the through hole 11 having the same size as the through hole 11 shown in FIG. If the tip hood 10 is formed in front of the tip end surface 2a, the tip hood 10 becomes weak and the tip hood 10 is greatly deformed when the tip edge 10a of the tip hood 10 is pressed against the mucous membrane.

  On the other hand, in the present invention, as shown in FIG. 1, when the tip hood 10 is attached to the tip portion main body 2, the through hole 11 is formed so as to straddle the front and rear surfaces 2 a of the tip portion main body 2. Therefore, even if the through hole 11 is formed to have a size that allows a sufficient amount of liquid to pass through, the tip hood 10 does not deform greatly when the tip edge 10a of the tip hood 10 is pressed against the mucosal surface.

  It should be noted that the tip hood 10 of the present invention is formed transparently so that an endoscopic observation image can be obtained through the tip hood 10 so that ligation, mucosal detachment or the like using an endoscope is possible. It is possible to facilitate the operation when performing the above procedure.

  Further, the present invention is not limited to the above-described embodiment. For example, in a state where the tip hood 10 is attached to the tip portion main body 2, the area of more than half of the through hole 11 is the tip surface 2 a of the tip portion main body 2. If it comprises so that it may be located back, shape stability of tip hood 10 is securable.

It is side surface sectional drawing of the state in which the front-end | tip hood of the front-end | tip part of the endoscope of the Example of this invention was attached to the front-end | tip part main body. It is a perspective view in the state where the tip hood of the tip part of the endoscope of the example of the present invention was removed from the tip part main part. It is a perspective view of the state where the tip hood of the tip part of the endoscope of the example of the present invention was attached to the tip part main part. It is side surface sectional drawing of the state in which the front-end | tip hood of the front-end | tip part of the endoscope of the 1st reference example of this invention was attached to the front-end | tip part main body. It is side surface sectional drawing of the state in which the front-end | tip hood of the front-end | tip part of the endoscope of the 2nd reference example of this invention was attached to the front-end | tip part main body. It is a perspective view in the state where the tip hood of the tip part of the conventional endoscope was removed from the tip part main part. It is a perspective view in the state where the tip hood of the tip part of the conventional endoscope was attached to the tip part main part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insertion part 2 Tip part main body 2a Tip surface 3 Observation window 10 Tip hood 10a Tip edge 11 Through-hole

Claims (3)

The tip hood, which is formed in a substantially cylindrical shape by a resilient material and has a through hole in the side wall portion, projects forward from the tip surface of the tip portion body in which an observation window or the like is arranged on the tip surface. In the distal end portion of the endoscope detachably attached to the outer peripheral portion of the distal end body,
The distal end portion of the endoscope, wherein the through hole is formed at a position straddling the front and rear of the distal end surface of the distal end portion main body in a state where the distal end hood is attached to the distal end portion main body.   The distal end portion of the endoscope according to claim 1, wherein in the state where the distal end hood is attached to the distal end portion main body, an approximately half area of the through hole is located behind the distal end surface of the distal end portion main body.   The distal end portion of the endoscope according to claim 1, wherein, in a state where the distal end hood is attached to the distal end portion main body, an area of more than half of the through hole is located behind the distal end surface of the distal end portion main body.

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