JPH10201713A - Washing sheath for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent any humor from entering into between the head folded part of the washing a main body of a washing sheath and a tip surface a insert part of the endoscope, by arranging a humor entry-preventing means on the head of the main body of washing sheath to swing-drop off the humor out of the periphery of the washing sheath's main body of the washing sheath. SOLUTION: A tip opening 18 is made at the sheath head 15 tip to expose the endocsope's tip surface. A humor guiding groove made throughout the periphery at the sheath tip 15 is made so as to draw a quadric curve gradually nearing toward the head direction as it goes downward from a part corresponding to the upward of the endoscope at the base end of the sheath head periphery. This guiding groove 23, the bottom edge 15a at the sheath head 15 and the warped part 22 swing-droop off the humor led to the sheath head 15 of its main body 6 along its 6 peripheral surface therefrom.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning sheath for an endoscope which is used by being attached to an endoscope so as to cover the entire outer peripheral surface of an insertion portion of the endoscope.

[0002]

2. Description of the Related Art In recent years, endoscopes have been widely used for surgery and the like. Here, the endoscope is used in a state where it has been inserted through a trocar mantle tube previously punctured in the body wall. In addition, during the surgical operation, there is a problem that the objective lens on the distal end surface of the insertion portion of the endoscope is stained by bleeding or the like, thereby hindering the visual field of the endoscope.

Therefore, as a means for solving this problem,
For example, Japanese Unexamined Patent Publication No. 8-173370 discloses that blood is removed by using an endoscope cleaning sheath that is externally attached to an endoscope and is used to cover the entire outer peripheral surface of the insertion portion of the endoscope. The configuration is described.

[0004] The sheath body of the cleaning sheath is formed in a tubular cross section over the entire length. When the outer peripheral surface of the insertion portion of the endoscope is externally attached to the endoscope in a state of being covered with the sheath body of the cleaning sheath, the cleaning medium is supplied between the insertion portion of the endoscope and the cleaning sheath. Gaps are formed.

[0005] Further, a folded portion which is folded inward is formed at the foremost portion of the cleaning sheath. Then, the flow of the cleaning medium supplied through the gap between the insertion portion of the endoscope and the cleaning sheath is bent at the turn-back portion in the direction of the objective lens at the distal end surface of the insertion portion of the endoscope, and the flow of the endoscope is reduced. The objective lens has a structure for hitting.

[0006]

However, in the above-mentioned conventional structure, the sheath body of the cleaning sheath is formed in a tubular cross-sectional shape over the entire length, and furthermore, the cleaning sheath has an inward direction at the foremost end thereof. Since the folded portion folded back to the side is formed to be bent, bleeding from the trocar puncture portion of the body wall reaches the tip of the cleaning sheath from the outer periphery of the trocar mantle tube through the outer periphery of the cleaning sheath during surgery, and There is a problem that the wraparound portion of the cleaning sheath and the distal end face of the insertion portion of the endoscope are wrapped around the fold portion. Here, the blood that has flowed between the folded portion of the cleaning sheath and the distal end surface of the insertion portion of the endoscope is heated and dried by the light emitted from the light guide of the endoscope, and is emitted by the light guide. May stick to the part.

Further, once the blood has dried and adhered to the light emitting portion of the light guide, the washing sheath carries out water supply, suction, and the like to clean the light emitting portion of the light guide. Can not be dropped. As a result, there is a problem that the light emitted from the light guide is blocked and the observation image of the endoscope becomes dark.

The present invention has been made in view of the above circumstances, and has as its object the purpose of bodily fluid or the like traveling along the outer periphery of the cleaning sheath main body and the folded portion of the distal end of the cleaning sheath main body and the distal end face of the insertion portion of the endoscope. It is an object of the present invention to provide a cleaning sheath for an endoscope, which prevents penetration between the endoscopes and can always obtain a bright observation image with an endoscope used in combination.

[0009]

A cleaning sheath body is provided for covering the entire outer peripheral surface of the insertion portion of the endoscope, and the endoscope is provided in such a state that the entire outer peripheral surface of the insertion portion of the endoscope is covered with the cleaning sheath body. A cleaning sheath for an endoscope in which a distal end opening for exposing a distal end surface of an insertion portion of the endoscope to the outside is formed at a distal end portion of the cleaning sheath main body while being used externally to a mirror, Before the bodily fluid guided to the distal end portion of the cleaning sheath main body along the outer peripheral surface of the cleaning sheath main body enters the inside of the distal opening portion of the cleaning sheath main body from the edge portion of the distal opening portion of the cleaning sheath main body, A body fluid intrusion preventing means for preventing the body fluid from penetrating into the distal end opening of the cleaning sheath body by swinging down from the outer peripheral surface of the cleaning sheath body is provided at the distal end of the cleaning sheath body. Washing sea It is. During the surgical operation, when bodily fluid such as bleeding from the trocar puncture portion of the body wall is guided along the outer peripheral surface of the cleaning sheath main body to the distal end side of the cleaning sheath main body, the body fluid is opened at the distal end of the cleaning sheath main body. Before entering the inside of the distal opening of the cleaning sheath main body from the edge portion of the portion, by shaking off the outer peripheral surface of the cleaning sheath main body by means of body fluid intrusion prevention means at the distal end of the cleaning sheath main body,
The body fluid guided along the outer peripheral surface of the cleaning sheath main body to the distal opening side of the cleaning sheath main body is prevented from entering the distal opening of the cleaning sheath main body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 (A), (B) and FIG. FIGS. 1A and 1B show a state in which an endoscope cleaning sheath 1 according to the present embodiment is attached to an endoscope 2. FIG.
Here, the endoscope 2 has an elongated insertion portion 3 inserted into the body.
And an operation unit 4 on the hand side connected to the base end of the insertion unit 3. A pin 5 for attaching a cleaning sheath is protruded from the front end of the operation unit 4 of the endoscope 2.

FIG. 1A shows the cleaning sheath 1.
As shown in (B), an elongated cylindrical cleaning sheath body 6 that covers the entire outer peripheral surface of the insertion section 3 of the endoscope 2 is provided. At the base end of the cleaning sheath body 6, a substantially cylindrical mounting portion 7 is provided, which is removably mounted on the operating portion 4 of the endoscope 2.

Further, at the rear end of the outer peripheral surface of the mounting portion 7,
A substantially L-shaped cam groove 8 is provided. The cam groove 8 engages with the pin 5 of the operation section 4 of the endoscope 2 when the cleaning sheath 1 is mounted on the endoscope 2, and fixes the cleaning sheath 1 to the endoscope 2. As shown in FIG. 3, a solid-state imaging device 10 is built in the distal end portion 9 of the insertion section 3 of the endoscope 2. Then, the position of the cam groove 8 is such that the cleaning sheath 1 is connected to the endoscope 2.
When the solid-state imaging device 10 is mounted on the endoscope 2, the solid-state imaging device 10 in the distal end portion 9 is positioned so that the upward direction (the upward direction in FIG. 1B) is uniquely determined with respect to the cleaning sheath 1. ing.

A cylindrical base 11 is protruded from a substantially central portion of the outer peripheral surface of the mounting portion 7. This base 11
Is connected to one end of an external tube 12. The other end of the outer tube 12 is connected to an air supply, water supply means, or suction means (not shown). Air can be supplied, water-supplied, and sucked into the base 11 through the tube 12.

The sheath body 6 includes an elongated cylindrical sheath hard portion 13 connected to the mounting portion 7, a tube-shaped sheath soft portion 14 provided at the tip of the sheath hard portion 13, and a sheath soft portion 14. It is composed of a distal end side of the portion 14, that is, a sheath distal end portion 15 provided at the forefront of the cleaning sheath 1. Here, the sheath distal end portion 15 is attached to the distal end portion 9 of the endoscope 2. Further, the sheath flexible portion 14 is disposed at a position covering a bending portion 16 that bends the distal end portion 9 of the endoscope 2 in four directions, up, down, left, and right.

A flow path 17 is provided between the outer peripheral surface of the insertion section 3 of the endoscope 2 and the inner peripheral surface of the sheath body 6 of the cleaning sheath 1.
Are formed. The rear end of the flow path 17 communicates with the inner cavity of the base 11.

Further, a packing (not shown) is mounted on the inner peripheral surface of the rear end of the mounting portion 7. When the cleaning sheath 1 is attached to the endoscope 2, the gap between the outer peripheral surface of the operation unit 4 of the endoscope 2 and the inner peripheral surface of the mounting unit 7 of the cleaning sheath 1 is sealed by the packing. Insertion part 3 of endoscope 2
The channel 17 between the sheath body 6 and the sheath body 6 is kept airtight.

A distal end opening 18 for exposing the distal end surface 9a of the distal end portion 9 of the endoscope 2 to the outside is formed at the distal end of the sheath distal end portion 15 of the cleaning sheath 1. Further, at a peripheral portion of the distal end opening 18 of the sheath distal end portion 15, a folded portion 19 protruding toward the inside is formed over the entire circumference.

The entire length of the sheath body 6 of the cleaning sheath 1 is formed slightly longer than the entire length of the insertion section 3 of the endoscope 2. Further, a gap 20 communicating with the distal end of the flow path 17 is formed between the folded portion 19 of the sheath distal end 15 and the distal end surface 9 a of the endoscope 2.

A substantially beak-shaped gutter portion 21 extending from the folded portion 19 to the distal end is provided at the lower edge 15a of the sheath distal end portion 15 corresponding to the downward direction of the insertion portion 3 of the endoscope 2. I have. At the end of the gutter portion 21, a warped portion 22 bent outward is protruded.

Further, on the outer peripheral surface of the sheath distal end portion 15,
A body fluid guide groove 23 is formed over the entire circumference. The guide groove 23 is formed so as to draw a quadratic curve that gradually approaches the distal direction from the portion corresponding to the upward direction of the endoscope 2 at the base end of the outer peripheral surface of the sheath distal end portion 15 toward the downward direction. ing. The body fluid guided along the outer peripheral surface of the sheath main body 6 to the sheath distal end portion 15 of the sheath main body 6 by the guide groove 23 and the gutter portion 21 and the warp portion 22 of the lower edge portion 15a of the sheath distal end portion 15 is sheathed. Before entering the inside of the distal end opening 18 of the sheath main body 6 from the edge portion of the distal end opening 18 of the main body 6, it shakes off from the outer peripheral surface of the sheath main body 6 and enters the distal end opening 18 of the sheath main body 6. Is formed.

Next, the operation of the above configuration will be described.
The cleaning sheath 1 of the present embodiment is used by being attached to an endoscope 2. When attaching the cleaning sheath 1 to the endoscope 2, the insertion section 3 of the endoscope 2 is inserted into the sheath body 6 from the attachment section 7 side, and the insertion section 3 of the endoscope 2 is covered with the sheath body 6. I do.

When the mounting portion 7 of the cleaning sheath 1 reaches the vicinity of the operating portion 4 of the endoscope 2, the pin 5 of the operating portion 4 of the endoscope 2 is inserted into the cam groove 8 of the mounting portion 7. Insert. At this time, the entire cleaning sheath 1 is moved in the axial direction with respect to the endoscope 2 in a state where the pin 5 is moved along the cam groove 8 of the attachment portion 7, and then a predetermined amount is moved at the end position of the cam groove 8. The endoscope 2 is rotated and attached to the pin 5 of the operation section 4 of the endoscope 2 by the mounting section 7.
Of the cam groove 8 is engaged. Thereby, the attachment direction and the attachment position of the cleaning sheath 1 to the insertion portion 3 of the endoscope 2 are fixed in a state where they are uniquely positioned.

That is, the gutter 21 of the sheath distal end 15 must be
Is disposed below the insertion section 3 of the endoscope 2, and the guide sheath 23 on the outer peripheral surface of the sheath distal end portion 15 is always inclined toward the gutter section 21. It is fixed to the endoscope 2.

Here, the endoscope 2 with the cleaning sheath 1 attached thereto
Next, the insertion portion 3 is inserted into a trocar mantle tube previously punctured in the body wall and inserted into the body. Then, observation and treatment of the inside of the body by the endoscope 2 are performed.

The distal end 9 of the endoscope 2 according to the present embodiment.
Can be bent in four directions of up, down, left, and right by the bending portion 16, so that the field of view of the endoscope 2 is changed while the up and down direction of the solid-state imaging device 10 and the top and bottom directions of the endoscope 2 are almost matched. Observation, treatment, etc. can be performed while doing so.

If the objective lens 25 disposed on the distal end surface 9a of the insertion section 3 of the endoscope 2 becomes dirty during use, a cleaning medium is supplied from the external tube 12.
At this time, after the cleaning medium supplied from the outer tube 12 reaches the distal end from the inner cavity of the base 11 via the flow path 17, the flow of the cleaning medium is changed at the folded portion 19 of the sheath distal end portion 15 by the endoscope. The distal end surface 9a of the second insertion portion 3 rebounds in a state of being bent toward the objective lens 25, whereby the objective lens 25 is washed.

During observation or treatment with the endoscope 2, bleeding from the trocar puncture portion of the patient's body wall may fall from the trocar mantle tube along the outer peripheral surface of the cleaning sheath 1. is there. At this time, the blood is supplied to the cleaning sheath 1
From the outer peripheral surface of the sheath hard portion 13 to the outer peripheral surface of the sheath distal end portion 15 along the outer peripheral surface of the sheath soft portion 14.

Further, in the endoscope 2 of the present embodiment, the distal end portion 9 can be bent in four directions of up, down, left and right by the bending portion 16, so that the downward direction of the solid-state imaging device 10 substantially coincides with the direction of gravity. Observation and treatment can be performed as it is. Therefore, the blood that has reached the outer peripheral surface of the sheath distal end portion 15 is
It is collected by gravity along the guide groove 23 on the outer peripheral surface of the sheath distal end portion 15 at the lower edge 15a of the sheath distal end portion 15 arranged below the endoscope 2. The blood collected here travels along the lower edge 15a of the sheath distal end portion 15 and further flows to the gutter portion 21 side at the distal end.

At this time, the lower edge 15 of the sheath distal end 15
The blood flowing from “a” to the gutter portion 21 side is guided further outward along the warped portion 22 at the tip of the gutter portion 21. Therefore, the blood falling along the outer peripheral surface of the cleaning sheath 1 is washed by gravity without flowing into the gap 20 between the distal end surface 9a of the insertion section 3 of the endoscope 2 and the folded portion 19 of the cleaning sheath 1. It falls out of the sheath 1.

Therefore, the above configuration has the following effects. That is, in the present embodiment, a gutter 21 is provided on the lower edge 15a of the sheath tip 15 of the cleaning sheath 1 so as to extend further to the tip than the folded portion 19, and the gutter 21 is bent outward at the tip of the gutter 21. A warp portion 22 is provided in a protruding manner, and a guide groove 23 for bodily fluid is formed on the outer peripheral surface of the sheath distal end portion 15. The guide groove 23, the gutter portion 21 of the lower edge 15 a of the sheath distal end portion 15, and the warp portion 22 are formed. Before the bodily fluid guided to the sheath distal end portion 15 of the sheath main body 6 along the outer peripheral surface of the sheath main body 6 enters the inside of the distal end opening portion 18 of the sheath main body 6 from the edge portion of the distal end opening portion 18 of the sheath main body 6. In addition, a body fluid intrusion prevention means 24 for preventing the body fluid 6 from falling down from the outer peripheral surface of the sheath body 6 and entering the distal end opening 18 of the sheath body 6 is formed.
Therefore, the blood falling along the outer peripheral surface of the cleaning sheath 1 does not flow into the gap 20 between the distal end surface 9a of the insertion portion 3 of the endoscope 2 and the folded portion 19 of the cleaning sheath 1,
Since the blood can be dropped from the outer peripheral surface of the sheath distal end portion 15 by gravity, blood bleeding from the trocar puncture portion of the body wall does not adhere to the emission portion of the light guide of the endoscope 2 as in the related art. With the endoscope 2 used in combination with the cleaning sheath 1, a bright observation image can always be obtained.

FIG. 4 shows a second embodiment of the present invention. In the present embodiment, the configuration of the sheath distal end portion 15 in the cleaning sheath body 6 of the first embodiment (see FIGS. 1A, 1B and 3) is changed as follows.

That is, in this embodiment, a weir 31 projecting inward is provided on the inner peripheral surface of the substantially beak-shaped gutter portion 21 formed at the lower edge portion 15a of the sheath distal end portion 15 at the folded portion 1.
9 is provided in parallel. Here, weir 31 is gutter part 2
1 and the folded portion 19.
The configuration of the other parts is the same as that of the first embodiment, and the same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.

Next, the operation of the above configuration will be described.
During use of the endoscope 2 equipped with the cleaning sheath 1, the endoscope 2
If the bleeding from the trocar puncture portion of the patient's body wall falls from the trocar mantle tube along the outer circumference of the cleaning sheath 1 during observation, treatment, etc. The guide groove 23 collects the lower end portion 15 a of the sheath distal end portion 15. The blood further flows along the lower edge 15a of the sheath distal end portion 15 to the distal end side.

Here, the lower edge 15a of the sheath distal end 15
, A gutter portion 21 is extended from the folded portion 19 to the tip side,
Further, since a weir 31 projecting inward is provided between the tip of the gutter portion 21 and the folded portion 19, blood flowing to the tip side along the lower edge 15 a of the sheath tip portion 15 is allowed to flow therethrough. Even when the blood flows around the inner surface, the flow of the blood can be more reliably blocked by the weir 31 and the folded portion 19. Therefore, also in the present embodiment, blood falling along the outer peripheral surface of the cleaning sheath 1 is not affected by the endoscope 2.
Tip surface 9a of the insertion portion 3 and the folded portion 1 of the cleaning sheath 1
9 and fall out of the cleaning sheath 1 by gravity without going around the gap 20 between them.

Therefore, in the above configuration, a substantially beak-shaped gutter 2 formed on the lower edge 15a of the sheath distal end 15 is provided.
Since the weir 31 projecting toward the inner side is provided on the inner peripheral surface of the cleaning sheath 1 in parallel with the folded portion 19, the blood falling along the outer peripheral surface of the cleaning sheath 1 is protected by the lower edge 15 of the sheath distal end portion 15.
Even when the water flows to the distal end side along the line a and goes around the inner surface side of the gutter portion 21, the flow of the blood can be reliably blocked by the weir 31 and the folded portion 19. Therefore, even in the present embodiment, the blood bleeding from the trocar puncture portion of the body wall is used as the light guide of the endoscope 2 without increasing the outer diameter of the cleaning sheath 1 as in the first embodiment. And the endoscope 2 used in combination with the cleaning sheath 1 can always obtain a bright observation image.

FIG. 5 shows a third embodiment of the present invention. In this embodiment, a donut-shaped balloon made of an elastic member is provided on the outer peripheral surface of the proximal end portion of the sheath distal end portion 15 of the cleaning sheath 1 of the first embodiment (see FIGS. 1A, 1B and 3). 41 is fixed. One end of a fluid supply / discharge channel 42 is connected to the balloon 41 to inflate or deflate the balloon 41. The channel 42 extends along the sheath body 6 toward the mounting portion 7 at the base end.

Further, the other end of the channel 42 is connected to a fluid supply mechanism (not shown) for supplying a fluid such as physiological saline to the lumen of the balloon 41. The configuration of the other parts is the same as that of the first embodiment, and the same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.

Next, the operation of the above configuration will be described.
Also in this embodiment, the endoscope 2 is inserted into the body in the same procedure as in the first embodiment. Subsequently, a physiological saline solution or the like is sent from the channel 42 to inflate the balloon 41. In this state, the inside of the body is observed and treated by the endoscope 2 as in the first embodiment.

When bleeding from the trocar puncture portion of the patient's body wall falls along the outer periphery of the cleaning sheath 1 from the trocar mantle tube during observation and treatment with the endoscope 2, The flow of the blood is prevented from going to the distal end by the inflated balloon 41. Further, even if the flow of blood transmitted along the outer circumference of the cleaning sheath 1 has passed over the balloon 41, the blood drops due to the guide groove 23 and the gutter 21 provided on the outer circumference of the sheath distal end portion 15.

Therefore, in the above configuration, the balloon 4 is attached to the outer peripheral surface of the proximal end of the sheath distal end 15 of the cleaning sheath 1.
In the state where the balloon 1 is fixed and the balloon 41 is inflated, the inside of the body is observed and treated by the endoscope 2 in the same manner as in the first embodiment. Inflated balloon 4 for the falling blood flow
1 can prevent heading toward the tip. Therefore, in the present embodiment, the first embodiment (FIG. 1)
(See (A), (B) to FIG. 3) Endoscope 2 more reliably
This prevents blood from flowing into the gap 20 between the distal end surface 9a of the insertion portion 3 and the folded portion 19 of the sheath distal end portion 15, and has an effect of always obtaining a bright observation image of the endoscope 2.

FIG. 6 shows a fourth embodiment of the present invention. In the present embodiment, the configuration of the sheath distal end portion 15 in the cleaning sheath body 6 of the first embodiment (see FIGS. 1A, 1B and 3) is changed as follows.

That is, in the present embodiment, the cleaning sheath 1
A folded portion 51 protruding inward over the entire periphery of the distal end portion of the sheath distal end portion 15 is formed, and a water-repellent coat 52 is applied over the entire outer peripheral surface of the sheath distal end portion 15. . The configuration of the other parts is the same as that of the first embodiment, and the same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.

Next, the operation of the above configuration will be described.
During use of the endoscope 2 equipped with the cleaning sheath 1, the endoscope 2
If the bleeding from the trocar puncture portion of the patient's body wall falls along the outer circumference of the cleaning sheath 1 from the trocar mantle while performing observation, treatment, etc., the blood is transferred to the sheath distal end portion 15. To reach. At this time, in the present embodiment, the outer peripheral surface of the sheath distal end portion 15 extends over the entire circumference.
Since the water-repellent coat 52 has been applied, the sheath tip 15
Blood falls at.

Therefore, in the present embodiment having the above configuration, the sheath distal end portion 15 of the cleaning sheath 1 can be formed in a cylindrical shape, so how the cleaning sheath 1 can be rotated about the axis of the sheath body 6. The end surface of the insertion section 3 of the endoscope 2 may be used even when the endoscope 2 and the cleaning sheath 1 that do not include the solid-state imaging device 10 (see FIG. 3) in the distal end portion 9 are combined. Blood can be prevented from flowing into the gap 20 between the sheath 9a and the folded portion 19 of the sheath distal end portion 15, and a bright endoscopic image can always be obtained.

Note that the first embodiment (FIG. 1A,
As a modification of (B) to FIG. 3), the guide groove 23 may be provided in the sheath hard portion 13 or the sheath soft portion 14. In addition, by making the number of the guide grooves 23 plural,
Blood wraparound can be prevented more reliably.

Further, as a modified example of the fourth embodiment (see FIG. 6), a water-repellent coat 52 may be applied to the entire outer peripheral surface of the sheath body 6 of the cleaning sheath 1, and in this case, blood wraps around. Can be more effectively prevented.

FIGS. 7A and 7B show the fifth embodiment of the present invention.
1 shows an embodiment of the present invention. FIG. 7A shows a state in which the endoscope cleaning sheath 61 of the present embodiment is attached to the endoscope 62.

The endoscope 62 of the present embodiment has an insertion portion 63 formed of a straight pipe for insertion into the body, and the insertion portion 63
And an operation unit 64 on the hand side connected to the base end of the hand.

Further, the sheath 61 is provided with an elongated cylindrical cleaning sheath body 65 made of a hard member that is mounted so as to cover the entire outer peripheral surface of the insertion portion 63 of the endoscope 62. A substantially cylindrical attachment portion 66 that is detachably attached to the operation portion 64 of the endoscope 62 is connected to a proximal end portion on the proximal side of the cleaning sheath body 65. A base (not shown) is provided on the outer peripheral surface of the mounting portion 66 so as to project therefrom.
An external tube connected to air supply, water supply means, or suction means (not shown) is connected to this base. Then, liquid can be sent and suctioned from the tube to the flow path in the gap between the outer peripheral surface of the insertion portion 63 of the endoscope 62 and the cleaning sheath body 65 of the sheath 61 through the base.

Further, a substantially ring-shaped concave portion 67 is formed on the inner peripheral surface of the distal end portion of the sheath body 65 as shown in FIG. 7B. A substantially ring-shaped elastic member 68 is fixed to the concave portion 67. A substantially ring-shaped flange portion 69 bent inward at a substantially right angle is formed on the inner peripheral surface of the distal end portion of the elastic member 68. This flange 69
At least one nozzle portion 70 for spraying a water supply liquid onto the distal end surface of the insertion portion 63 of the endoscope 62 is provided on the inner wall surface of the endoscope 62.

The effective length of the sheath 61 is such that when the sheath 61 is mounted on the endoscope 62, the inner wall surface of the flange 69 of the elastic member 68 on the inner peripheral surface of the distal end of the sheath body 65 is formed by the endoscope 62. The length is set so that it can be pressed against.

Therefore, in the above configuration, when the sheath 61 is mounted on the endoscope 62, the outer periphery of the insertion portion 63 of the endoscope 62 is passed from the external tube through the base of the mounting portion 66 of the sheath 61. The liquid is supplied, suctioned, and the like are performed in a flow path in a gap between the surface and the cleaning sheath body 65 of the sheath 61. At this time, the distal end surface of the insertion portion 63 of the endoscope 62 and the inner wall surface of the flange portion 69 of the elastic member 68 are in close contact with each other. There is no risk of leakage. Therefore, the water supply liquid supplied to the flow path in the gap between the outer peripheral surface of the insertion portion 63 of the endoscope 62 and the cleaning sheath body 65 of the sheath 61 is surely ejected from the nozzle portion 70, and the endoscope 62 Insertion section 63
Can be sprayed on the distal end surface of the endoscope 62, so that there is no danger of the water supply liquid leaking out of the portion other than the nozzle portion 70 when the water supply liquid is supplied, and the end surface of the insertion section 63 of the endoscope 62 can be cleaned easily with the objective lens. Can be better.

In the present embodiment, when the sheath 61 is mounted on the endoscope 62, the flange 69 of the elastic member 68 on the inner peripheral surface of the distal end of the sheath body 65 is pressed against the endoscope 62, and Since the water supply liquid does not leak from other than 70,
There is also an effect that the dripping phenomenon from the sheath 61 after suction is less likely to occur.

FIG. 8 shows a fifth embodiment (FIG. 7).
(See (A) and (B)) of the first cleaning sheath 61 for an endoscope.
This shows a modification of the first embodiment. In this modified example, a cylindrical elastic member 71 is attached to a distal end portion of a sheath body 65 in the sheath 61 of the fifth embodiment.

Here, in this modification, a substantially ring-shaped concave portion 72 for attaching the elastic member 71 is formed on the inner peripheral surface of the distal end portion of the sheath body 65. Further, a concave portion 73 having a shape corresponding to the concave portion 72 of the sheath body 65 is formed on the outer peripheral surface of the base end portion of the elastic member 71. The elastic member 71 is attached to the distal end portion of the sheath body 65 in a state where the concave portion 72 of the sheath body 65 is externally fitted on the concave portion 73 of the elastic member 71 and overlapped.

A substantially ring-shaped flange portion 7 bent inward at a substantially right angle is provided on the inner peripheral surface of the distal end portion of the elastic member 71.
4 are formed. At least one nozzle portion 75 that sprays a water supply liquid onto the distal end surface of the insertion portion 63 of the endoscope 62 is provided on the inner wall surface of the flange portion 74.

The effective length of the sheath 61 is such that the elastic member 71 at the distal end of the sheath body 65 is pressed against the endoscope 62 when the sheath 61 is mounted on the endoscope 62. Is set.

Therefore, in this modified example, similarly to the fifth embodiment, when the sheath 61 is mounted on the endoscope 62, the flange 74 of the elastic member 71 at the distal end of the sheath body 65 is connected to the endoscope 62. Can be held in a state in which the water supply liquid is supplied to the flow path in the gap between the outer peripheral surface of the insertion portion 63 of the endoscope 62 and the cleaning sheath body 65 of the sheath 61. Since the water can be ejected from the nozzle portion 75 and sprayed on the distal end surface of the insertion portion 63 of the endoscope 62, there is no possibility that the water supply liquid leaks out of a portion other than the nozzle portion 75 when the water supply liquid is supplied. The cleanability of the objective lens and the like on the distal end surface of the insertion portion 63 can be further improved.

Also in this embodiment, when the sheath 61 is mounted on the endoscope 62, the flange 74 of the elastic member 71 at the distal end of the sheath body 65 is pressed against the endoscope 62, and other than the nozzle 75. Since the water supply liquid does not leak from the water, there is also an effect that the dripping phenomenon after suction is less likely to occur.

Further, in the present modification, in particular, the sheath body 6
Since the entire distal end portion of No. 5 was constituted by the elastic member 71,
Even when the elastic member 71 at the distal end of the sheath body 65 is strongly pressed against an organ in the body, there is an effect that the risk of damaging the organ can be reduced.

FIGS. 9 and 10 show an endoscope cleaning sheath 6 according to a fifth embodiment (see FIGS. 7A and 7B).
9 shows a second modification of the first embodiment. In this modification, a substantially ring-shaped flange 81 bent inward at a substantially right angle is formed at the distal end of the sheath body 65 of the sheath 61 of the fifth embodiment. A substantially ring-shaped packing 82 made of an elastic member is attached between the insertion portion 63 and the distal end surface thereof. The outer diameter of the packing 82 is set to be substantially the same as the inner diameter of the sheath body 65.

The outer periphery of the packing 82 is shown in FIG.
As shown at 0, at least one nozzle portion 83 is provided. Further, an opening 84 having a size that does not obstruct the visual field of the endoscope 62 is provided at the center of the packing 82.

The packing 82 can be removed from the inner wall surface of the flange portion 81 of the sheath body 65. Further, the effective length of the sheath 61 is set to such a length that the packing 82 is pressed against the endoscope 62 when the sheath 61 is attached to the endoscope 62.

Therefore, in this modified example, as in the fifth embodiment, when the sheath 61 is mounted on the endoscope 62, the packing 82 attached to the inner wall surface of the flange portion 81 at the distal end of the sheath body 65 is used. Since water can be held in a state of being pressed against the endoscope 62, water is supplied to a flow path in a gap between the outer peripheral surface of the insertion portion 63 of the endoscope 62 and the cleaning sheath body 65 of the sheath 61. Since the liquid can be reliably ejected from the nozzle portion 83 and sprayed onto the distal end surface of the insertion portion 63 of the endoscope 62, there is no possibility that the water supply liquid leaks out of a portion other than the nozzle portion 83 when the water supply liquid is supplied, The cleaning property of the objective lens and the like on the distal end surface of the insertion section 63 of the endoscope 62 can be further improved.

In this embodiment, when the sheath 61 is attached to the endoscope 62, the flange 8
Since the packing 82 attached to the inner wall surface of the tube 1 is pressed against the endoscope 62 and the water supply liquid does not leak from the portion other than the nozzle portion 83, there is also an effect that the dripping phenomenon from the sheath 61 after suction is less likely to occur.

Further, in this modification, in particular, the sheath body 6
Since the removable packing 82 is mounted on the inner wall surface of the flange portion 81 of No. 5, the structure is particularly simple and the processing is easy. Therefore, it can be created at low cost. Further, by making the packing 82 detachable, when the elastic member of the packing 82 is deteriorated, the packing 82 can be easily replaced.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. Next, other characteristic technical matters of the present application will be additionally described as follows.

(Appendix 1) In the cleaning sheath for an endoscope used by being attached to an endoscope, the cleaning sheath for the endoscope, of the distal end portion of the cleaning sheath for the endoscope, is attached to the endoscope. When mounted, a portion located in the direction of gravity is provided with a beak projecting in the distal direction, and at least one groove is provided on an outer periphery of an insertion portion of the cleaning sheath for an endoscope. Cleaning sheath for mirror.

(Additional Item 2) The cleaning sheath for an endoscope according to Additional Item 1, wherein the groove is a groove inclined toward the beak. (Additional Item 3) The endoscope cleaning sheath according to Additional Item 1 or 2, wherein a bend is provided at a tip end of the beak portion so as to protrude toward an outer diameter side of the endoscope cleaning sheath. .

(Additional Item 4) In the cleaning sheath for an endoscope used by being attached to an endoscope, a part of the outer periphery of an insertion portion of the cleaning sheath for the endoscope is provided with a water-repellent coat. Endoscope cleaning sheath.

(Conventional Techniques of Supplementary Items 1 to 4) In recent years, endoscopes have been widely used for surgery and the like, and the endoscope is used in a state of being inserted through a trocar mantle tube punctured in a body wall. During the surgical operation, there is a problem that the end objective lens of the endoscope is stained due to bleeding or the like, thereby hindering the visual field. As means for solving this problem, for example,
Some use a cleaning sheath, such as that described in 173370, to remove blood. In such a cleaning sheath, the leading end of the cleaning sheath is folded back to the inner diameter side, and the cleaning medium supplied through the gap between the endoscope and the cleaning sheath is applied to the end objective lens of the endoscope at the folded portion. A splashing structure is adopted. The insertion portion of the cleaning sheath has a tubular shape in cross section over the entire length.

(Problems to be Solved in Additional Items 1 to 4)
However, in the structure in which the leading edge of the cleaning sheath is folded and the outer periphery of the cleaning sheath is a tubular shape over the entire length, bleeding from the trocar puncture portion of the body wall is transmitted along the outer periphery of the cleaning sheath from the outer periphery of the trocar mantle tube. It reaches the distal end of the sheath, and further wraps around the folded portion of the cleaning sheath and the end surface of the endoscope along the folded portion. Blood that has wrapped around the folded portion and the end surface of the endoscope may be heated and dried by the light emitted from the light guide of the endoscope, and may adhere to the light guide emission portion. Once the blood has dried and adhered to the light guide emission portion, it cannot be dropped even if the light guide emission portion is washed by performing water supply, suction, or the like using a cleaning sheath. As a result, there is a problem that the light emitted from the light guide is blocked and the image of the endoscope becomes dark.

(Objects of Supplementary Items 1 to 4) The present invention has been made in view of the above circumstances, and is intended to allow a bodily fluid or the like to travel along the outer periphery of a cleaning sheath between a folded portion of the cleaning sheath and a distal end surface of the endoscope. It is an object of the present invention to provide a cleaning sheath for an endoscope that prevents penetration into the endoscope and that can always obtain a bright observation image with an endoscope used in combination.

(Means and Actions for Solving the Problems in Supplementary Item 1) The cleaning sheath for an endoscope according to Supplementary Item 1 is a cleaning sheath for an endoscope used by being attached to an endoscope. Of the distal end portion of the cleaning sheath, when a cleaning sheath for an endoscope is attached to the endoscope, a portion located in the direction of gravity,
By providing a beak projecting in the distal direction and providing at least one groove on the outer periphery of the insertion portion of the endoscope cleaning sheath, bleeding from the trocar piercing portion of the body wall can be viewed from the outer periphery of the trocar. It has the effect of dropping blood from the outer circumference of the endoscope cleaning sheath before passing along the outer circumference of the mirror cleaning sheath and between the folded portion of the endoscope cleaning sheath and the endoscope distal end surface.

(Means and Action for Solving the Problem of Additional Item 2) The groove has at least one groove inclined toward the beak portion, and thus has the same function as that of Additional Item 1. (Means and Action for Solving the Problem of Supplementary Item 3) By providing the tip of the beak with a warp projecting toward the outer diameter side of the cleaning sheath for an endoscope, the same effect as that of the additional item 1 is provided. .

(Means and Actions for Solving the Problems in Supplementary Item 4) The cleaning sheath for an endoscope according to Supplementary Item 4 is a cleaning sheath for an endoscope used by being attached to an endoscope. By applying a water-repellent coat to a part of the outer circumference of the insertion portion of the cleaning sheath, bleeding from the trocar piercing portion of the body wall travels from the outer circumference of the trocar to the outer circumference of the cleaning sheath for an endoscope, and the endoscope. The blood has the effect of dropping blood from the outer periphery of the endoscope cleaning sheath before entering between the folded portion of the cleaning sheath for use and the end surface of the endoscope.

(Effects of Additional Items 1 to 4) An endoscope used in combination by preventing bodily fluids and the like from traveling along the outer periphery of the cleaning sheath and entering the folded portion of the cleaning sheath and the distal end surface of the endoscope. Thus, a bright observation image can always be obtained.

(Additional Item 5) An endoscope provided with an observation means on a distal end surface, and a sheath for covering the endoscope, wherein the endoscope is provided with a flow path between the endoscope and the sheath. In an endoscope apparatus provided with means for supplying and sucking a fluid to a distal end surface of a mirror, at least a portion of the distal end portion of the sheath which is in contact with the endoscope distal end surface is an elastic member. Mirror device.

(Additional Item 6) The endoscope apparatus according to Additional Item 5, wherein the elastic member is provided on an inner wall surface of the distal end portion of the sheath. (Additional Item 7) The endoscope apparatus according to Additional Item 5, wherein the entire distal end portion of the sheath is formed of the elastic member.

(Additional Item 8) The endoscope apparatus according to Additional Item 5, wherein the elastic member is a disk-shaped packing having substantially the same diameter as the inner diameter of the sheath. (Prior art of Supplementary items 5 to 8) As a conventional technique, there is JP-A-8-280609, in which a pipe is mounted over the outer periphery of an insertion section of an endoscope, and is mounted on an operation section of the endoscope. The sheath main body is connected to the proximal end of the pipe on the proximal side. A substantially ring-shaped flange having a shape bent at substantially a right angle toward the inside thereof is formed at the foremost end of the pipe, and at least one nozzle is provided on an inner wall surface of the flange.

(Problems to be Solved in Additional Items 5 to 8)
In the related art, the distal end portion of the sheath is formed of a rigid member, so that when the sheath is mounted on the endoscope, the distal end surface of the endoscope does not completely adhere to the inner wall surface of the flange at the distal end portion of the sheath. For this reason, the water supply liquid, which should be jetted from the nozzle, leaks out of the gap between the endoscope distal end surface and the inner wall of the flange at the foremost end of the sheath. There was a drawback of lowering. In addition, since there is a gap between the distal end surface of the endoscope and the inner wall surface of the flange at the foremost end of the sheath, there is a disadvantage that a water dripping phenomenon in which the water supply liquid that cannot be completely sucked leaks to the distal end surface of the endoscope again. Was.

(Purposes of Supplementary Items 5 to 8) The purpose of Supplementary Items 5 to 8 is to bring the end surface of the endoscope into close contact with the inner wall surface of the flange at the foremost end of the sheath, and to surely eject the water supply liquid from the nozzle unit. In addition, by reducing the likelihood of dripping after suction, which hinders the visual field, endoscopes can easily remove dirt from the visual field without having to remove the endoscope from the body and can reduce the time required for endoscopic surgery. A mirror device is provided.

(Means and Actions for Solving the Problems of Additional Items 5 to 8) In the structure of the additional items 5 to 8, since the distal end surface of the endoscope and the inner wall surface of the flange of the sheath are in close contact with each other, the water supply liquid is surely supplied to the nozzle portion. It has the effect that the water supply liquid is not leaked from the nozzle portion except the nozzle portion.

(Effects of Additional Items 5 to 8) The distal end surface of the endoscope and the inner wall surface of the flange at the foremost portion of the sheath are completely adhered to each other.
The water-supplying liquid is surely ejected from the nozzles, preventing the dripping phenomenon after suction that hinders the visual field, making it possible to easily remove dirt from the visual field without having to pull out the endoscope from the body. It is possible to provide an endoscope apparatus capable of shortening an endoscope operation time.

[0085]

According to the present invention, the bodily fluid guided along the outer peripheral surface of the cleaning sheath main body to the distal end of the cleaning sheath main body is moved from the edge portion of the distal opening of the cleaning sheath main body to the distal end opening of the cleaning sheath main body. Before entering the inside, a body fluid intrusion prevention means is provided at the distal end of the cleaning sheath body to prevent the body from being shaken off from the outer peripheral surface of the cleaning sheath body and entering the distal end opening of the cleaning sheath body. It is possible to prevent the cleaning sheath body from entering between the folded portion of the distal end of the cleaning sheath body and the distal end surface of the insertion portion of the endoscope along the outer periphery of the sheath body, and to always obtain a bright observation image by the endoscope used in combination. it can.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention;
(A) is a top view which shows the state which attached the cleaning sheath for endoscopes to an endoscope, (B) is the same side view.

FIG. 2 is a perspective view showing an appearance of a distal end portion of the cleaning sheath body according to the first embodiment.

FIG. 3 is a longitudinal sectional view of a distal end portion of the cleaning sheath body according to the first embodiment.

FIG. 4 is a longitudinal sectional view showing a distal end portion of a cleaning sheath main body according to a second embodiment of the present invention.

FIG. 5 is a plan view showing a state where a cleaning sheath for an endoscope according to a third embodiment of the present invention is mounted on an endoscope.

FIG. 6 is a longitudinal sectional view showing a configuration of a main part of an endoscope cleaning sheath according to a fourth embodiment of the present invention.

FIG. 7 shows a fifth embodiment of the present invention;
(A) is a side view showing a state in which a cleaning sheath for an endoscope is attached to an endoscope in a partial cross section, and (B) is a longitudinal sectional view of a distal end portion of the cleaning sheath.

FIG. 8 is a longitudinal sectional view of a main part showing a first modification of the cleaning sheath for an endoscope according to the fifth embodiment;

FIG. 9 is a longitudinal sectional view of a main part showing a second modification of the cleaning sheath for an endoscope according to the fifth embodiment;

FIG. 10 is a plan view showing a ring-shaped packing of an endoscope cleaning sheath according to a second modified example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning sheath 2 Endoscope 3 Insertion part 6 Sheath main body 9a Tip surface 15 Sheath tip 18 Tip opening 24 Body fluid intrusion prevention means

Claims (1)

[Claims] 1. A cleaning sheath body that covers the entire outer peripheral surface of an insertion section of an endoscope, and is externally attached to the endoscope in a state where the entire outer peripheral surface of the insertion section of the endoscope is covered by the cleaning sheath body. A cleaning sheath for an endoscope, wherein a distal end opening for exposing a distal end surface of an insertion portion of the endoscope to the outside is formed at a distal end of the cleaning sheath main body. Before the body fluid guided to the distal end of the cleaning sheath main body along the outer peripheral surface of the cleaning sheath main body enters the inside of the distal end opening of the cleaning sheath main body from the edge portion of the distal opening of the cleaning sheath main body. A cleaning sheath for an endoscope, characterized in that a body fluid intrusion prevention means for preventing the body fluid from penetrating into the distal end opening of the cleaning sheath main body by swinging off from the outer peripheral surface of the cleaning sheath main body is provided at the distal end of the cleaning sheath main body.