JP2014090736A - Distal end cap device for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach and detach an insertion part of an endoscope to and from a distal end part, and enough secure hooking force of a bowel by the distal end part by making strong the fixed state to the distal end part of the insertion part so that the insertion part can be smoothly inserted in a depth part.SOLUTION: A distal end cap device 1 for an endoscope includes: a cap body 3 fitted to the tip side of an insertion part 6; a connection tube 4, one end of which is connected to the cap body 3 and the other end of which is connected to a suction device 5 for sucking a fluid; a lumen holding part 3A provided on the outer peripheral side of the cap body 3; an endoscope holding part 3B provided on the inner peripheral side of the cap body 3; an internal conduit 25 provided in the interior of the cap body 3 for connecting the lumen holding part 3A and one end side of the connection tube 4 and the endoscope holding part 3B and one end side of the connection tube 4 to communicate with each other; and a check valve 23 provided in the internal conduit 25 to secure a passage for a fluid so that before the lumen holding part 3A holds the insertion part 6 on the inner wall of the lumen, the outer peripheral surface of the insertion part 6 is held by the endoscope holding part 3B.

Description

  The present invention relates to an endoscope distal end cap device having a cap body attached to the distal end side of an insertion portion of an endoscope that is inserted into a lumen.

  As is well known, endoscopes are widely used for observation, treatment, etc. in the body of a living body or inspection, repair, etc. in industrial plant equipment. In particular, medical endoscopes can observe a region to be examined in a body cavity by inserting an elongated insertion portion into the body cavity without requiring an incision. Widely used because it can be treated and treated.

  In order to improve the insertability of the insertion portion of the endoscope in this medical field into the patient's lumen, an endoscope overtube having a balloon that is inserted through the insertion portion and inflated or deflated is provided on the distal end side. Used to perform endoscopic procedures.

  As an example of a technique for performing an endoscopic examination of the small intestine using such an overtube for an endoscope, for example, an operator inflated the balloon of the overtube for an endoscope in the middle of a lumen. There is a technique in which an endoscope is inserted into a deep part of a lumen, and the intestinal tract is gripped (hereinafter referred to as hooking) by a distal end portion of the insertion portion in a state where the bending portion is bent.

  Thereafter, the operator contracts the balloon while keeping the hooked state by the distal end portion, and then advances the overtube for endoscope to the deep portion to inflate the balloon. Then, after releasing the hooking by making the bending portion non-curving, the endoscope overtube and the endoscope held in the inner wall of the lumen by inflation of the balloon are pulled back, so that the inside of the lumen Shorten the intestine. By repeating such an operation, the insertion portion of the endoscope is inserted into the deep intestine.

As an endoscope apparatus that facilitates the insertion of an endoscope insertion portion into a deep portion of a lumen using a balloon, there is an endoscope apparatus described in Patent Document 1, for example.
The endoscope apparatus described in Patent Document 1 includes a balloon member that constitutes an endoscope insertion assisting tool, and a shaft that allows the balloon member to move forward and backward from the hand side. The member has a balloon, and is configured to have a hollow shape that covers and fixes the balloon and can be covered from the distal end side of the distal end portion of the endoscope insertion portion.

  In addition, in the endoscope apparatus described in Patent Document 1, in order to improve workability when performing a treatment by causing the treatment tool to protrude from the treatment tool guide channel, the swing direction and the protrusion amount of the treatment tool are set. It regulates and is provided with the hood arrange | positioned in the state positioned in the circumferential direction at the front-end | tip part of an insertion part.

JP 2008-99744 A

  However, in the conventional endoscope apparatus described in Patent Document 1, since the balloon member including the balloon is configured to advance and retract from the distal end portion of the insertion portion in the insertion direction or the proximal side direction, the endoscope overtube is provided. However, the technique of hooking the intestinal tract with the distal end portion of the endoscope and inserting the insertion portion into the deep portion is difficult, and the balloon member is not easily attached to and detached from the distal end portion of the insertion portion.

  Further, in the endoscope apparatus described in Patent Document 1 provided with a hood at the distal end portion, since the hood is disposed at the distal end portion of the insertion portion, an endoscope overtube is used similarly to the above, When the intestinal tract is hooked by the distal end, the connection state between the hood and the distal end is loosened, and a desired portion of the intestinal tract cannot be efficiently grasped.

  For this reason, when this endoscope apparatus is used, the intestinal tract cannot be efficiently shortened by the balloon of the endoscope overtube, so that the insertion portion cannot be smoothly inserted into the deep portion of the lumen. There is a fear.

  Therefore, the present invention has been made in view of the above-described problems, and facilitates the attachment / detachment of the insertion portion of the endoscope to the distal end portion, and strengthens the fixing state of the insertion portion with the distal end portion. It is an object of the present invention to provide a distal end cap device for an endoscope which can sufficiently secure the intestinal hooking force due to the above and can smoothly insert an insertion portion into a deep portion.

  An endoscope distal end cap device according to an aspect of the present invention includes a cap body attached to the distal end side of an insertion portion of an endoscope to be inserted into a lumen, one end side connected to the cap body, and the other end side receiving fluid. A connection tube connected to a pump for suction or supply, a lumen holding portion that is provided on the outer peripheral side of the cap main body and holds the insertion portion on the inner wall of the lumen, and provided on an inner peripheral side of the cap main body An endoscope holding portion that holds the outer peripheral surface of the insertion portion, and a duct that is provided inside the cap body and forms a flow path of the fluid, the lumen holding portion and the connection tube One end side of the endoscope, the endoscope holding part and the one end side of the connecting tube connected to each other, and the inner pipe line, the lumen holding part serving as the insertion part. Hold on the inner wall of the lumen In comprises a a valve to ensure the flow path of the fluid so as to hold the outer peripheral surface of the insertion portion by the endoscope holding portion.

  According to the present invention, the insertion portion of the endoscope can be easily attached to and detached from the distal end portion, and the fixing state of the insertion portion with the distal end portion is strengthened to sufficiently secure the intestinal hooking force by the distal end portion. Thus, it is possible to provide an endoscope tip cap device that can smoothly insert the insertion portion into the deep portion.

The block diagram which showed typically the whole structure of the tip cap apparatus for endoscopes which concerns on the 1st Embodiment of this invention. Sectional drawing which shows the structure of the cap main body and connection tube of FIG. 2 is an exploded perspective view showing a specific configuration of the cap body of FIG. FIG. 3 is a cross-sectional view taken along the line VI-VI in FIG. 3 showing the configuration of the check valve provided in the first main body. FIG. 3 is a cross-sectional view taken along the line V-V in FIG. 3 to explain the configuration of the second main body. 3 is a cross-sectional view taken along the line VI-VI in FIG. The perspective view when it sees from the base end side of the 2nd main body of FIG. The figure which shows an example of the tube fixing tool for fixing a connection tube to an insertion part Explanatory drawing for demonstrating the operation example which hooks an intestinal tract using the front-end | tip cap apparatus for endoscopes and the endoscope overtube of 1st Embodiment, and inserts an insertion part into the deep part. The block diagram which showed typically the whole structure of the tip cap apparatus for endoscopes which concerns on the 2nd Embodiment of this invention. The perspective view for demonstrating the specific structure of the cap main body of FIG. Side view of the cap body of FIG. The figure which shows an example of the tube fixing tool for fixing two connection tubes to an insertion part The block diagram which showed typically the whole structure of the tip cap apparatus for endoscopes which shows the modification of 2nd Embodiment. The block diagram which showed typically the structure of the principal part of the tip cap apparatus for endoscopes which concerns on the 3rd Embodiment of this invention. The perspective view for demonstrating the specific structure of the cap main body of FIG. The figure which shows the specific structure of the non-return valve used for the cap main body of FIG. The block diagram which showed typically the structure of the principal part of the tip cap apparatus for endoscopes which shows the modification of 3rd Embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
Hereinafter, an endoscope tip cap device according to the present invention will be described. In the following description, the drawings based on each embodiment are schematic, and the relationship between the thickness and width of each part, the thickness ratio of each part, and the like are different from the actual ones. It should be noted that the drawings may include portions having different dimensional relationships and ratios between the drawings.

  First, an embodiment of the present invention will be described based on the drawings. 1 to 9 relate to a first embodiment of the present invention, and FIG. 1 is a configuration diagram schematically showing the overall configuration of an endoscope tip cap device according to the first embodiment.

As shown in FIG. 1, the endoscope distal end cap device 1 according to the present embodiment mainly includes an endoscope 2, a cap body 3, a connection tube 4, and a suction device 5. .
The endoscope 2 includes a long and narrow insertion portion 6, an operation portion 7, and a universal cord (not shown). The insertion portion 6 of the endoscope 2 includes a rigid distal end portion 8, a bending portion 9, and a flexible tube portion 10 in order from the distal end.

A bend preventing portion 11 is provided on the operation portion 7 on the insertion portion 6 side, and the flexible tube portion 10 of the insertion portion 6 extends from the bend preventing portion 11.
The operation section 7 is provided with a bending operation knob 12 for bending the bending section 9 of the insertion section 6, and is provided with switches 13 to 15 for various endoscope functions. Yes.
The bending operation knob 12 is arranged so that a UD bending operation knob 12a for bending the bending portion 9 in the up-down direction and an RL bending operation knob 12b for bending the bending portion 9 in the left-right direction are superimposed. Has been.

  Further, an air / water supply button 13, a suction button 14, and a retrofit suction button 15 are provided in the vicinity of the bending operation knob 12 of the operation unit 7. The surgeon can perform air supply or water supply by operating the air / water supply button 13. In addition, the operator can suck body fluid and other fluids from the opening of the distal end through a channel in the insertion portion 6 (not shown) by operating the suction button 14.

  Further, the operator operates the post-suction button 15 to suck the distal end portion 8 of the insertion portion 6 from the hole 22 arranged on the inner peripheral surface side of the cap body 3 through the connection tube 4 as will be described later. And can be held. Further, the intestinal wall in the lumen can be sucked and held from the hole 24 disposed on the outer peripheral surface side of the cap body 3. Specific configurations of the retrofitting suction button 15, the connection tube 4, and the cap body 3 will be described later.

  In the system provided with the endoscope 2 shown in FIG. 1, although not shown, components and peripheral devices of known endoscope systems such as a universal cord, a light source device, a light guide bundle, a video processor, and a monitor However, since these constituent members and peripheral devices do not constitute characteristic portions of the present invention, description thereof will be omitted.

  As shown in FIG. 1, the distal end cap device 1 for an endoscope according to the present embodiment includes a cap body 3, a connection tube 4, a lumen holding portion 3A provided on the outer peripheral side of the cap body 3, and a cap body. 3 has an endoscope holding portion 3B provided on the inner peripheral side, an internal conduit 25 provided in the cap body 3, and a plurality of valves 23 provided in the internal conduit 25. Composed.

  The cap body 3 is formed in a hollow shape that is attached to the distal end side (the distal end portion 8 or the like) of the insertion portion 6 of the endoscope 2 to be inserted into the lumen, and is attached to and detached from the distal end side of the distal end portion 8. Can be mounted freely.

  The connection tube 4 has one end connected to the cap body 3 and the other end connected to a suction device 5 that is a pump that sucks or supplies fluid.

  The lumen holding part 3A of the cap body 3 is provided on the outer peripheral side of the cap body 3, and holds the insertion part 6 on the inner wall of the lumen (not shown). In addition, the endoscope holding portion 3 </ b> B of the cap body 3 is provided on the inner peripheral side of the cap body 3 and holds the outer peripheral surface of the insertion portion 6.

  The internal conduit 25 (FIG. 2) of the cap body 3 is a conduit that is provided inside the cap body 3 to form a fluid flow path, and includes one end side of the lumen holding portion 3A and the connection tube 4, This is a pipe line that connects the endoscope holding portion 3B and one end side of the connection tube 4 so as to communicate with each other.

  Further, the plurality of valves 23 are provided in the internal conduit 25, and before the lumen holding portion 3A holds the insertion portion 6 on the inner wall of the lumen (not shown), the endoscope holding portion 3B allows the outer periphery of the insertion portion 6 to be This is for securing a fluid flow path so as to hold the surface.

  In the present embodiment, the lumen holding part 3A has at least one or more holes 24 communicating with the internal conduit 25, and the suction device 5 sucks the fluid so that the tube is formed by the at least one or more holes 24. The inner wall of the cavity can be adsorbed.

  The endoscope holding unit 3B communicates the holding unit 3B1 (FIG. 2) that holds the outer peripheral surface of the insertion unit 6 by the suction device 5 sucking fluid, and the holding unit 3B1 and the internal conduit 25. A plurality of holes 22.

  Further, when the valve 23 is in a state where the outer peripheral surface of the insertion portion 6 is held by the holding portion 3B1 of the endoscope holding portion 3B, the valve 23 reverses the flow of fluid from the internal conduit 25 to the holding portion 3B1. It is configured using a stop valve.

  Next, a specific configuration of the cap body 3 will be described with reference to FIGS. 2 is a cross-sectional view showing the configuration of the cap body and the connecting tube of FIG. 1, FIG. 3 is an exploded perspective view showing the specific configuration of the cap body of FIG. 2, and FIG. 3 is a cross-sectional view taken along line IV-IV in FIG. 3 showing the structure of the check valve provided. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 7 is a sectional view taken along line VI-VI in FIG. 3, FIG. 7 is a perspective view when viewed from the proximal end side of the second body in FIG. 3, and FIG. It is a figure which shows an example of the tube fixing tool for fixing a tube to an insertion part.

  As shown in FIGS. 2 and 3, the cap body 3 is configured to include a first body 20 and a second body 21. Further, the plurality of valves 23 constituting the check valve are provided on the outer peripheral surface 20 </ b> A <b> 1 of the first main body 20 so as to close the openings of the plurality of holes 22 communicating with the internal conduit 25.

  The first main body 20 is a cylindrical member formed in a hollow shape that can be covered from the distal end side of the distal end portion 8 of the insertion portion 6, and has a main body portion 20A and a large diameter whose outer shape is larger than that of the main body 20A. Part 20B. In addition, the material of the 1st main body 20 is formed using resin members, such as silicone rubber, for example.

  A plurality of holes 22 constituting the endoscope holding portion 3B are provided on the outer peripheral surface 20A1 of the main body portion 20A. As shown in FIG. 3, the plurality of holes 22 are provided, for example, in six rows at equal intervals along the outer circumferential direction in the cross section of the main body 20A in the direction orthogonal to the central axis O of the main body 20A. For example, four pieces are provided in each row along the central axis O.

  That is, 24 holes 22 are provided. Of course, the number and arrangement position of the holes 22 are not limited to this, and may be appropriately changed as long as the number and arrangement can efficiently hold the outer surface of the insertion portion 6.

  The plurality of valves 23 are provided so as to block the openings of the plurality of holes 22, respectively. As shown in FIG. 4, the plurality of valves 23 have a fixing portion 23 a at the edge portion, and are fixed near the opening of the hole 22 of the main body portion 20 </ b> A by the fixing portion 23 a.

  In addition, the edge part which opposes the fixing | fixed part 23a of each valve 23 is not being fixed to the main-body part 20A. That is, when each valve 23 is sucked from the upper surface side of the valve 23, as shown by a dotted line in FIG. 4, the non-fixed side is bent upward and communicates with the hole 22. For this reason, the fluid sucked from the hole 22 is supplied to the internal conduit 25 through the plurality of valves 23.

On the other hand, when the suction of the fluid is stopped, each valve 23 has a function of preventing the fluid from the internal conduit 25 side from passing through the hole 22, so as shown in FIG. And the atmospheric pressure in the hole 22 can be kept low by closing the opening of the hole 22. That is, since the atmospheric pressure in the hole 22 can be kept low, the outer surface of the insertion part 6 indicated by the dotted line in FIG. 2 adsorbed by the opening of each hole 22 of the endoscope holding part 3B is continued. Can be done.
In addition, each valve 23 is not limited to the structure shown in FIG. 4, What kind of thing may be sufficient if it is provided with the function as a non-return valve.

  In the present embodiment, the thickness L1 of the large diameter portion 20B of the first main body 20 is, for example, 3 mm to 5 mm, and the diameter L2 of the insertion hole 20C of the first main body 20 is, for example, 8 mm to 12 mm. In this case, the diameter L3 of the cap body 3 is, for example, 11 mm to 17 mm. Of course, it is not limited to such dimensions.

  As shown in FIG. 3, the second main body 21 is attached to the outer peripheral side of the first main body 20, and is formed in a hollow shape that can be covered from the proximal end side of the first main body 20. It is the made cylinder member. In addition, the material of the 2nd main body 21 is formed using resin members, such as silicone rubber, similarly to the 1st main body 20, for example.

On the outer peripheral surface 21 </ b> A of the second main body 21, a plurality of holes 24 constituting the lumen holding portion 3 </ b> A are provided. In the cross section of the second main body 21 in the direction orthogonal to the central axis O, these plural holes 24 are provided, for example, in six rows at equal intervals along the outer peripheral direction, and further in each row along the central axis O. For example, three each are provided (see FIGS. 3 and 6). That is, 18 holes 24 are provided.
Of course, the number and arrangement position of the holes 24 are not limited to this, and may be appropriately changed as long as the number and arrangement can efficiently hold the intestinal wall of the lumen.

  Further, as shown in FIG. 3, a groove serving as an internal conduit 25 communicating with the plurality of holes 24 is formed on the surface of the inner peripheral surface of the second main body 21. As shown in FIG. 7, the proximal end side of the internal conduit 25 is connected so as to communicate with a connection base 26 attached to the proximal end surface of the second main body 21. Note that the connection tube 4 is connected to the connection base 26 as shown in FIG.

  Further, as shown in FIG. 6, the shape on the inner peripheral surface side of each hole 24 is formed in an arcuate concave shape, and the first main body 20 is inserted into the mounting hole 21 </ b> B of the second main body 21. The inner peripheral surface 21A1 of the mounting hole 21B is joined to the outer peripheral surface 20A1 of the main body portion 20A of the first main body 20, whereby an internal pipe line 25 in the direction of the central axis O is formed.

  Further, as shown in FIGS. 3 and 6, the inner duct 25 in the circumferential direction is communicated with each hole 24 in the cross section of the second main body 21 in the direction orthogonal to the central axis O. It is formed by a groove provided along the circumferential direction on the inner peripheral surface 21A1 of the two main bodies 21. The inner peripheral surface 21A1 of the second main body 21 is joined to the outer peripheral surface 20A1 of the main body portion 20A of the first main body 20 to form the inner pipe line 25 in the circumferential direction.

  Therefore, with such a configuration, the connection tube 4 is connected to the internal conduit 25, the plurality of holes 22 of the first main body 20, and the second main body via the connection base 26, as shown in FIGS. The plurality of holes 24 communicate with each other.

  Further, by sucking fluid such as air through the connection tube 4, the wall portion of the intestinal wall is formed by the plurality of holes 24 constituting the endoscope holding portion 3 </ b> B of the second main body 21 through the internal conduit 25. Can be adsorbed and retained.

  The connection tube 4 is a tube capable of sucking and feeding fluid and is disposed on the insertion portion 6 along the longitudinal direction of the insertion portion 6. The connection tube 4 is connected to the suction device 5 via a cylinder portion 15A of a retrofit suction button 15 provided later in the vicinity of the suction button 14 of the operation unit 7.

  The suction device 5 sucks fluid through the connected connection tube 4. Therefore, the surgeon can suck the fluid through the connection tube 4 while pushing the post-suction button 15 while pushing.

  That is, while the retrofitting suction button 15 is being pressed, the cylinder portion 15 </ b> A and the connection tube 4 communicate with each other, and a plurality of fluids disposed on the outer peripheral surface side of the cap body 3 are sucked by sucking the fluid in the connection tube 4. The intestinal wall is sucked and held by the hole 24. At the same time, the outer peripheral surface of the insertion portion 6 is sucked by the plurality of holes 22 arranged on the inner peripheral surface side of the cap body 3.

  When the surgeon stops the operation of the retrofitting suction button 15, the communication between the cylinder portion 15A and the connection tube 4 is closed, and the suction of the fluid in the connection tube 4 is stopped. Then, by the function of the check valve of the valve 23 as described above, the air pressure in the plurality of holes 22 constituting the endoscope holding portion 3B of the cap body 3 becomes lower than the air pressure in the internal conduit 25. The adsorption state of the outer surface of the insertion portion 6 is maintained.

  The connecting tube 4 is preferably fixed to the insertion portion 6 by using a fixing means. Examples of the fixing means include a medical tape 4S as shown in FIG. A tube fixture 30 having a tube fastening portion 30B and an insertion portion fastening portion 30A may be used. Of course, it is not limited to such fixing means, as long as it can be smoothly inserted even if the connecting tube 4 is fixed at a desired location in the longitudinal direction of the insertion portion 6 and inserted into the lumen. Any configuration may be used.

Next, the operation of the endoscope tip cap apparatus 1 of the present embodiment will be described with reference to FIG.
FIG. 9 is an explanatory diagram for explaining an operation example in which the intestinal tract is hooked using the endoscope tip cap device and the endoscope overtube according to the first embodiment, and the insertion portion is inserted into the deep portion. It is. The cap body 3 is previously attached to the distal end portion 8 of the insertion portion 6 of the endoscope 2, the connection tube 4 is held in the insertion portion 6, and the retrofitting suction button 15 is attached to the operation portion 7.

Now, it is assumed that, for example, an endoscopic examination of the small intestine is performed using the endoscope tip cap device 1 of the present embodiment and the endoscope overtube 40.
At this time, the surgeon inserts the insertion portion 6 of the endoscope 2 into the intestinal tract 100 while being inserted through the endoscope overtube 40.

  Then, as shown in FIG. 9A, the operator expands the balloon 41 of the endoscope overtube 40 at a midway position of the intestinal tract 100, so that the endoscope overtube 40 is attached to the intestinal tract 100. The insertion part 6 of the endoscope 2 is inserted into the deep part of the intestinal tract 100 in this state.

  When the insertion portion 6 is inserted up to the bending portion 101 in the intestinal tract 100, the surgeon curves the bending portion 9 as shown in FIG. The inner wall 100A of the intestinal tract 100 is hooked by the attached cap body 3.

At this time, the surgeon presses the retrofitting suction button 15. Then, the suction device 5 sucks the fluid in the internal conduit 25 of the cap body 3 through the connection tube 4.
Therefore, the plurality of holes 24 that are the lumen holding portions 3A of the cap body 3 adsorb the inner wall 100A of the intestinal tract 100 by suction through the internal conduit 25.
Further, the plurality of holes 22 which are the endoscope holding portions 3B of the cap main body 3 suck the outer peripheral surface of the distal end portion 8 of the insertion portion 6 through the internal conduit 25 by suction.

Here, suction by the plurality of holes 24 and 22 of the cap body 3 is performed for a predetermined time, whereby the inner wall 100A and the tip 8 are sucked by this suction.
Thereafter, the surgeon releases the retrofitting suction button 15 to stop the suction operation.
Then, the suction state of the inner wall 100A by the plurality of holes 24 of the endoscope holding portion 3B of the cap body 3 is held. At this time, the plurality of valves 23 provided in the first body 20 of the cap body 3 are in a state where the outer peripheral surface of the distal end portion 8 is held by the plurality of holes 24 of the endoscope holding portion 3B, that is, When suction operation of the retrofitting suction button 15 is performed, the suction of the fluid in the plurality of holes 22 is stopped.

  For this reason, since the air pressure in the plurality of holes 22 can be kept low by the function of each valve 23, the adsorption state of the outer surface of the distal end portion 8 adsorbed by the opening of each hole 22 of the endoscope holding unit 3B is maintained. Can be held.

  In this manner, the operator hooks the inner wall 100A of the intestinal tract 100 as shown in FIG. 9C while holding the inner wall 100A of the intestinal tract 100 by the cap body 3 and holding the distal end portion 8. At this time, since the inner wall 100A is sufficiently adsorbed and held by the plurality of holes 24 of the lumen holding portion 3A of the cap body 3, hooking can be performed efficiently.

  Further, when hooking, the distal end portion 8 of the insertion portion 6 is sufficiently sucked and held by the plurality of holes 22 and the plurality of valves 23 of the endoscope holding portion 3B of the cap body 3, so that the cap body 3 is inserted. The hooking can be performed smoothly without detaching from the tip 8 of the portion 6. Further, since the connection tube 4 is connected to the cap body 3, the cap body 3 is not displaced in the longitudinal direction of the insertion portion 6.

Then, as shown in FIG. 9 (c), the surgeon advances the endoscope overtube 40 to the deep part using the hooked state by the cap body 3 after the balloon 41 is deflated.
Thereafter, the surgeon inflates the balloon 41 at a desired position of the intestinal tract 100 as shown in FIG.

  Next, as shown in FIG. 9 (e), the surgeon releases the hooking by the cap body 3 by setting the bending portion 9 to the non-curving state. In this case, by returning the bending portion 9 to the non-curving state, the suction state by the plurality of holes 24 of the lumen holding portion 3A of the cap body 3 is released.

  Thereafter, as shown in FIG. 9 (f), the operator removes the endoscope overtube 40 and the insertion portion 6 of the endoscope 2 that are held on the inner wall 100 </ b> A of the intestinal tract 100 by the expansion of the balloon 41. By pulling back, the intestinal tract 100 is shortened. By repeating such an operation, the endoscope 2 can be smoothly inserted into the deep part of the intestine.

  Therefore, as described above, according to the first embodiment, the insertion portion 6 of the endoscope 2 can be easily attached to and detached from the distal end portion 8 and the fixing state of the insertion portion 6 with the distal end portion 8 is strengthened. Thus, the endoscope tip cap device 1 that can sufficiently secure the intestinal hooking force by the distal end portion 8 and can smoothly insert the insertion portion 6 into the deep portion can be realized.

  In the first embodiment, the plurality of holes 22 and 24 that respectively configure the lumen holding portion 3A and the endoscope holding portion 3B of the cap body 3 have been described as having a circular shape. The hole is not limited to a hole, and may be formed by, for example, a square, polygonal, or elliptical hole in addition to the circular hole. That is, it may be configured in a shape that can improve the adsorption force of the holes.

(Second Embodiment)
10 to 14 relate to a second embodiment of the present invention, and FIG. 10 is a configuration diagram schematically showing the overall configuration of an endoscope tip cap device according to the second embodiment. FIG. 12 is a perspective view for explaining a specific configuration of the cap body of FIG. 10, FIG. 12 is a side view of the cap body of FIG. 11, and FIG. 13 is a tube for fixing two connecting tubes to the insertion portion. FIG. 14 is a diagram illustrating an example of a fixture, and FIG. 14 is a configuration diagram schematically illustrating the overall configuration of an endoscope tip cap device according to a modification of the second embodiment.
10 to 14, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different portions are described.

  The cap body 3 of the first embodiment is configured by combining the members of the first body 20 and the second body 21, but the cap body 3 of the second embodiment is configured integrally. Further, another connecting tube 4A and a suction device 5A are provided to constitute an endoscope tip cap device 1A.

  Specifically, as shown in FIG. 10, the endoscope distal end cap device 1 includes a cap body 31, two connection tubes 4, 4A, and two suction devices 5, 5A.

  Similar to the first embodiment, the cap body 31 includes a plurality of holes 24 that constitute the lumen holding portion 31A, a plurality of holes 22 that constitute the endoscope holding portion 31B, and openings of the plurality of holes 22. And a plurality of valves 23 which are check valves provided so as to close the valve.

  Moreover, the cap main body 31 is a cylindrical member formed in a hollow shape that can be covered from the distal end side of the distal end portion 8 of the insertion portion 6 like the first main body 20, for example, a resin member such as silicone rubber It is formed using.

On the outer peripheral surface of the cap body 31, a plurality of holes 24 constituting the lumen holding part 31A are provided as in the first embodiment. In the cross section of the cap body 31 in the direction orthogonal to the central axis O, the plurality of holes 24 are provided with, for example, six rows on the outer periphery at equal intervals, and for example, three in each row along the central axis O. (See FIGS. 11 and 12). That is, 18 holes 24 are provided.
Further, as shown in FIGS. 11 and 12, an inner conduit 25 </ b> A communicating with the plurality of holes 24 is provided on the outer peripheral side of the cap body 31. As shown in FIG. 11, the proximal end side in the longitudinal direction of the internal conduit 25 </ b> A is connected so as to communicate with a connection base 26 attached to the outer peripheral side of the proximal end surface of the cap body 31. In addition, as shown in FIG. 10, the connection tube 4 is connected to this connection cap 26 similarly to 1st Embodiment.

  Further, as shown in FIG. 12, the inner conduit 25 </ b> A in the circumferential direction of the cap body 31 communicates with each hole 24 in a cross section of the cap body 31 in a direction orthogonal to the central axis O. 31 is provided on the outer peripheral side of the inside.

  Therefore, with such a configuration, the connection tube 4 communicates with the internal conduit 25 </ b> A of the cap body 31 and the plurality of holes 24 via the connection cap 26 as shown in FIGS. 10 to 13.

Further, on the inner peripheral surface of the cap main body 31, a plurality of holes 22 constituting the endoscope holding portion 31B are provided as in the first embodiment. In the cross section of the cap body 3 in the direction orthogonal to the central axis O, the plurality of holes 22 are provided with, for example, six rows at the outer periphery at equal intervals, and for example, three in each row along the central axis O. (See FIGS. 11 and 12). That is, 18 holes 22 are provided.
Further, as shown in FIGS. 11 and 12, an internal conduit 25 </ b> B communicating with the plurality of holes 22 is provided on the inner peripheral side of the cap main body 31. As shown in FIG. 11, the proximal end side in the longitudinal direction of the internal conduit 25 </ b> B is connected so as to communicate with a connection base 26 </ b> A attached to the inner peripheral side of the proximal end surface of the cap body 31. As shown in FIG. 10, the connection tube 4A newly provided as shown in FIG. 10 is connected to the connection base 26A, and the connection tube 4A is connected to the newly provided suction device 5A.

Further, as shown in FIG. 12, the inner conduit 25 </ b> B in the circumferential direction of the cap body 31 communicates with each hole 22 in a cross section of the cap body 31 in a direction orthogonal to the central axis O. 31 is provided on the inner peripheral side of the inside.
Further, the plurality of valves 23 are provided so as to block the openings of the plurality of holes 22 as in the first embodiment.

  Therefore, with such a configuration, the connection tube 4A communicates with the internal conduit 25B and the plurality of holes 22 of the cap body 31 via the connection cap 26A, as shown in FIGS.

  As described above, the endoscope distal end cap device 1A according to the present embodiment includes the plurality of holes 24, the inner conduit 25A, the connection tube 4, and the like that constitute the lumen holding portion 31A of the cap body 31. A lumen holding path, and an endoscope holding path including a plurality of holes 22, a plurality of valves 23, an internal conduit 25B, a connection tube 4A, and the like that constitute the endoscope holding portion 31B of the cap body 31. Having separate fluid paths.

  Also in this embodiment, the number and arrangement positions of the holes 22 and 24 are of course not limited to this. The number and arrangement can efficiently hold the outer surface of the insertion portion 6 and the inner wall of the lumen. If there are, you may change suitably. Also, each valve 23 is not limited to the configuration shown in FIG. 11, and any valve may be used as long as it has a function as a check valve.

  The newly provided suction device 5A can be turned on or off by operating other switches (not shown).

In this embodiment, since the two connection tubes 4 and 4A are used, as a fixing means for fixing these connection tubes 4 and 4A to the insertion portion 6, the medical tape 4S (FIG. 2). Reference) may be used. In addition to the medical tape 4S, for example, a tube fixture 30X having two tube fastening portions 30B and 30B1 and an insertion portion fastening portion 30A as shown in FIG. 13 may be used.
Other configurations are the same as those of the first embodiment.

  As described above, the endoscope distal end cap device 1A of the present embodiment is configured by the plurality of holes 24, the inner conduit 25A, the connection tube 4 and the like constituting the lumen holding portion 31A of the cap body 31. A lumen holding path and an endoscope holding path including a plurality of holes 22, a check valve 23, an internal conduit 25B, a connection tube 4A, and the like constituting the endoscope holding portion 31B of the cap body 31. Have. For this reason, the endoscope tip cap apparatus 1A sucks each fluid path individually, and can perform adsorption by the lumen holding part 31A and adsorption by the endoscope holding part 31B separately or simultaneously. it can.

  When actually inserting into the intestinal tract using the endoscope overtube 40 (see FIG. 9), the suction device 5A is turned on in advance and suction is performed from the plurality of holes 22 of the endoscope holding portion 31B of the cap body 31. It is desirable to suck and hold the tip 8.

  Thereby, even when it is necessary to insert the insertion portion 6 into the intestinal tract and advance and retreat in the intestinal tract, the cap body 31 and the distal end portion 8 can be strongly fixed, so that the cap main body 31 is detached from the distal end portion 8. Therefore, the insertion portion 6 can be smoothly advanced and retracted.

Further, when the other suction device 5 is turned on and sucked from the plurality of holes 24 of the lumen holding portion 3A of the cap body 3 to suck the wall portion of the intestinal wall and hooking is performed, the suction device 5A is turned off. If operated, as in the first embodiment, the function of the check valve 23 holds the suction of the distal end portion 8 by the endoscope holding portion 31B, so that the insertion portion 6 can be smoothly inserted into the deep portion of the intestinal tract. be able to.
Other operations are the same as those in the first embodiment.

  Therefore, according to the second embodiment, even when the cap body 31 is integrally formed, it is easy to attach and detach the insertion portion 6 of the endoscope 2 to the distal end portion 8 as in the first embodiment. In addition, the fixation state of the insertion portion 6 with the distal end portion 8 can be strengthened to sufficiently secure the intestinal tract hooking force by the distal end portion 8, and the insertion portion 6 can be smoothly inserted deeply. A mirror tip cap device 1A can be realized.

  In the second embodiment, as shown in the endoscope distal end cap device 1B of the modified example of FIG. 14, the plurality of check valves 23 in the cap body 31 are deleted and the proximal end side of the connection tube 4A is removed. One check valve 32 may be provided. The endoscope distal end cap device 1B forms a single fluid flow path with the connecting member 4X of the connecting tube 4A on the suction device side provided with the check valve 23 and the other connecting tube 4 by the mixing member 4X. You may comprise and connect to the suction apparatus 5 through a tube.

  According to such a configuration, the plurality of valves 23 that are check valves provided for the plurality of holes 22 of the cap body 31 can be eliminated, so that the structure of the cap body 31 is simplified and the manufacturing operation is facilitated. Can be. Moreover, since it can be comprised with the one non-return valve 32 and the one suction device 5, the number of parts can be reduced and cost can be reduced.

(Third embodiment)
FIGS. 15 to 18 relate to a third embodiment of the present invention, and FIG. 15 is a configuration diagram schematically showing the configuration of the main part of an endoscope tip cap device according to the third embodiment. 16 is a perspective view for explaining a specific configuration of the cap main body of FIG. 15, FIG. 17 is a diagram showing a specific configuration of a check valve used in the cap main body of FIG. 16, and FIG. It is the block diagram which showed typically the structure of the principal part of the tip cap apparatus for endoscopes which shows the modification of 3rd Embodiment.
15 to 18, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different portions are described.

The cap bodies 3 and 31 of the first and second embodiments are configured by a plurality of holes 24 as the lumen holding portions 3A and 31A and a plurality of holes 22 as the endoscope holding portions 3B and 31B. The cap main body 33 of the embodiment includes a lumen holding part 33A and an endoscope holding part 33B having balloons 34 and 36, respectively. Further, the endoscope distal end cap device 1 </ b> C is configured by providing an air supply device 5 </ b> X in accordance with the arrangement of the balloons 34 and 36.
Specifically, as shown in FIG. 15, the endoscope distal end cap device 1 </ b> C includes a cap body 33, a connection tube 4, and an air supply device 5 </ b> X.
As shown in FIGS. 15 and 16, the cap body 33 includes two holes 25a constituting the lumen holding part 33A, two balloons 34, two holes 25b constituting the endoscope holding part 33B, The balloon 36, two first check valves 35 provided so as to close the openings of the two holes 25a, and two second check valves 23 provided so as to close the openings of the two holes 25b. And having.

  Moreover, the cap main body 33 is a cylindrical member formed in a hollow shape that can be covered from the distal end side of the distal end portion 8 of the insertion portion 6 like the first main body 20 (see FIG. 2). It is formed using a resin member such as rubber.

  On the outer peripheral surface 33a of the cap body 33, two holes 25a constituting the lumen holding portion 33A are provided. These two holes 25a are provided to face the outer peripheral surface in the cross section of the cap body 33 in the direction orthogonal to the central axis O. Further, two balloons 34 are fixed on the outer peripheral surface of the cap body 33 so as to accommodate the openings of the two holes 25a, respectively.

  Further, a first check valve 35 is provided so as to block the openings of the two holes 25a. The first check valve 35 is formed in a circular shape as shown in FIG. 17A, and includes a fixed portion 35a disposed at the outer peripheral edge portion, and a vent hole 35b provided near the center. , And is configured. The first check valve 35 is fixed on the outer peripheral surface of the cap body 33 by the fixing portion 35a.

  In addition to the function of the check valve 23 used in the first and second embodiments, the first check valve 35 can suck fluid or supply air through the vent 35b. The pressure inside the balloon 34 can be maintained at a predetermined pressure.

  Inside the cap body 33, there are provided two holes 25a and an internal conduit 25 communicating with two holes 25b described later. As shown in FIG. 16, the base end side in the longitudinal direction of the internal conduit 25 is connected so as to communicate with a connection base 26 attached to the outer peripheral side of the base end face of the cap body 33. In addition, as shown in FIG. 15, the connection tube 4 is connected to this connection cap 26, and this connection tube 4 is connected to the air supply apparatus 5X.

  Further, two holes 25b constituting the endoscope holding portion 33B are provided on the inner peripheral surface 33b of the cap body 33 at positions facing the two holes 25a. These two holes 25b are provided so as to face each other on the inner peripheral surface 33b in the cross section of the cap body 33 in a direction orthogonal to the central axis O. Two balloons 36 are fixed on the inner peripheral surface 33b of the cap body 33 so as to cover the openings of the two holes 25b, respectively.

  Further, a second check valve 23 having a function similar to that of the first embodiment is provided so as to block the openings of the two holes 25b. As shown in FIG. 17B, the second check valve 23 has a fixing portion 23a at the edge, and is fixed in the vicinity of the opening of the hole 25b by the fixing portion 23a. The second check valve 23 allows the fluid to pass through the non-fixed portion 23b when the fluid is sucked.

  The two holes 25b communicate with the internal conduit 25, and are disposed so as to face the two holes 25a via the internal conduit 25, respectively. Although not shown in the drawings, the inner conduit 25 in the circumferential direction of the cap body 33 is communicated with the holes 25a and 25b in the cross section of the cap body 31 in the direction orthogonal to the central axis O. 33 is provided inside.

  Therefore, with such a configuration, the connection tube 4 is connected to the inner conduit 25 of the cap body 33, the two holes 25a and 25b, and the two balloons 34 via the connection cap 26, as shown in FIGS. , 36.

  The air supply device 5X is a device that can supply or suck fluid by operating an air supply or suction button (not shown). Therefore, by turning on or off the air supply device 5X, the fluid can be supplied to or sucked into the internal conduit 25 in the cap body 33 via the connection tube 4.

In the present embodiment, the number and size of the balloons 34 and 36 are not particularly limited. If the number and size can efficiently hold the outer surface of the insertion portion 6 and the inner wall of the lumen, You may change suitably.
Other configurations are the same as those of the first embodiment.

  The endoscope tip cap device 1C of the present embodiment includes a lumen holding portion 33A of the cap body 33, which includes two holes 25a, two first check valves 35, and two balloons 34. The endoscope holding part 3 </ b> B includes two holes 25 b, two second check valves 23, and two balloons 36.

  For this reason, the endoscope tip cap apparatus 1C supplies air into the internal conduit 25 via the connection tube 4 to inflate the balloons 34 and 36 to the inner wall of the intestinal tract by the lumen holding portion 33A. And holding of the distal end portion 8 of the insertion portion 6 by the endoscope holding portion 33B can be performed.

  That is, by inflating the two balloons 34 constituting the lumen holding portion 33A of the cap body 33, the cap body 33 and the distal end portion 8 can be held on the wall portion of the intestinal wall. Further, by inflating the two balloons 36 constituting the endoscope holding portion 33B of the cap body 33, the cap body 33 can be strongly held at the distal end portion 8.

  In this case, if the second check valve 23 stops the air supply by the air supply device 5X, the air pressure in the two balloons 36 of the cap body 33 becomes lower than the air pressure in the internal conduit 25, so that the balloon Since the expansion state of 36 can be left as it is, the outer surface of the insertion portion 6 can be continuously held.

  If the second check valve 23 has a valve characteristic that opens with a pressure difference smaller than that of the first check valve 35, the cap body 33 always maintains the inflated state of the balloon 36. Can be firmly fixed to the tip 8 and will not come off.

  Therefore, according to the third embodiment, even when the lumen holding portion 33A and the endoscope holding portion 33B of the cap body 33 are mainly configured by the balloons 34 and 36, similarly to the first embodiment. In addition to facilitating attachment / detachment of the insertion portion 6 to / from the distal end portion 8 of the endoscope 2, the fixing state of the insertion portion 6 with the distal end portion 8 is strengthened to sufficiently secure the intestinal hooking force by the distal end portion 8. Thus, it is possible to realize an endoscope tip cap device 1C that can smoothly insert the insertion portion 6 into a deep portion.

  In the third embodiment, as shown in the endoscope distal end cap device 1D of the modified example of FIG. 18, two second check valves constituting the endoscope holding portion 33B in the cap body 33 are provided. 23 is deleted, and an internal conduit 25B that communicates with the balloon 36 of the endoscope holding portion 33B and a connection tube 4A that communicates with the internal conduit 25B are newly provided. Two check valves 32 may be provided.

  The endoscope distal end cap device 1D forms a single communication path between the connecting tube 4A on the air feeding device 5X side provided with the check valve 23 and the other connecting tube 4 by the mixing member 4X. It may be configured to be connected to the air supply device 5X through a tube.

  According to such a configuration, since the second check valve 23 provided for each of the two holes 25b of the cap body 33 can be eliminated, the structure of the cap body 33 can be simplified and the manufacturing operation can be facilitated. . Moreover, since it can be comprised with the one non-return valve 32 and the one suction device 5, the number of parts can be reduced and cost can be reduced.

  The present invention is not limited to the above-described embodiments and modifications, and various changes and modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 1A-1D ... End cap device 2 for endoscopes ... Endoscope 3 ... Cap main body 3A ... Lumen holding part 3B ... Endoscope holding part 3B1 ... Holding part 4, 4A ... Connection tube 4S ... Medical tape 4X ... mixing member 5 ... suction device 5, 5A ... suction device 5X ... air supply device 6 ... insertion portion 7 ... operation portion 8 ... tip portion 9 ... bending portion 10 ... flexible tube portion 12 ... bending operation knob 13 ... air supply Water supply button 14 ... Suction button 15 ... Retrofit suction button 15A ... Cylinder portion 20 ... First main body 20A ... Main body portion 20B ... Large diameter portion 20A1 ... Outer peripheral surface 20A2 ... Inner peripheral surface 20C ... Insertion hole 21 ... Second main body 21A ... outer peripheral surface 21A1 ... inner peripheral surface 21B ... mounting hole 22 ... hole 23 ... valve (check valve)
23a ... Fixed part 23b ... Non-fixed part 24 ... Hole 25, 25A, 25B ... Inner conduit 25a, 25b ... Hole 26 ... Connector 26A ... Connector 30 ... Tube fixture 31, 33 ... Cap body 31A, 33A ... Pipe Cavity holding part 31B, 33B ... Endoscope holding part 32 ... Check valve 34 ... Balloon 35 ... First check valve 35a ... Fixing part 35b ... Vent 36 ... Balloon 40 ... Endoscope for endoscope 41 ... Balloon 100 ... Intestinal tract 100A ... Inner wall 101 ... Bent part

Claims (7)

A cap body attached to the distal end side of the insertion portion of the endoscope to be inserted into the lumen;
A connection tube having one end connected to the cap body and the other end connected to a pump for sucking or supplying fluid;
A lumen holding portion that is provided on the outer peripheral side of the cap body and holds the insertion portion on the inner wall of the lumen;
An endoscope holding portion that is provided on the inner peripheral side of the cap body and holds the outer peripheral surface of the insertion portion;
A conduit that is provided inside the cap body and forms a flow path for the fluid, the lumen holding portion and one end side of the connection tube, and the endoscope holding portion and one end side of the connection tube. And an internal conduit connected so as to communicate with each other,
The fluid is provided in the internal conduit so that the endoscope holding portion holds the outer peripheral surface of the insertion portion before the lumen holding portion holds the insertion portion on the inner wall of the lumen. A valve that secures the flow path;
A tip cap device for an endoscope, comprising:   The lumen holding part is at least one or more holes communicating with the internal conduit, and the pump sucks the fluid so that the inner wall of the lumen is adsorbed by the at least one or more holes. The endoscope front-end cap device according to claim 1, wherein:   The endoscope holding portion includes a holding portion that holds the outer peripheral surface of the insertion portion by the pump sucking or supplying the fluid, and a plurality of holes that communicate the holding portion and the internal conduit. The distal end cap device for an endoscope according to claim 1 or 2, further comprising:   The holding portion is an adsorption portion that adsorbs the outer peripheral surface of the insertion portion when the pump sucks the fluid, or a balloon that holds the outer peripheral surface of the insertion portion when the pump supplies the fluid. The tip cap device for an endoscope according to claim 3, wherein:   The valve includes a check valve that blocks supply or suction of the fluid to the holding unit when the outer peripheral surface of the insertion unit is held by the holding unit of the endoscope holding unit. The endoscope front end cap device according to claim 4, wherein the endoscope end cap device is provided. The cap main body is mounted on the outer peripheral side of the first main body having the endoscope holding portion and the internal conduit, and the second main body has the lumen holding portion and the internal conduit. With a body of
2. The internal view according to claim 1, wherein the valve is provided so as to block openings of a plurality of holes communicating with the internal pipe line provided on an outer peripheral surface of the first main body. End cap device for mirrors. The valve is provided so as to close an opening of a hole communicating with the internal conduit provided on the inner peripheral surface of the cap body when the holding portion of the endoscope holding portion is a balloon.
The lumen holding portion is configured by a balloon that holds the insertion portion on the inner wall of the lumen when the pump supplies the fluid, and the opening of the hole provided on the outer peripheral surface of the cap body. The endoscope distal end cap device according to claim 4, wherein a second valve is provided so as to be closed.

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