JP2007083072A - Balloon catheter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a balloon catheter allowing an operator to easily confirm whether the tip end of an endoscope is positioned inside or outside a balloon in an image obtained by the endoscope. <P>SOLUTION: This balloon catheter 1 is provided with an outer tube 2, an inner tube 3 axially movable in the outer tube 2, and a balloon 4 having one end attached to the tip end of the outer tube 2 and the other end attached to the tip end of the inner tube 3, and being storable in the outer tube 2. The balloon catheter 1 allows the tip end 71 of the endoscope 70 to pass through inside the inner tube 3 and the balloon 4 and to be inserted into a living body from the tip end of the balloon catheter 1. The balloon 4 is formed into such a color that the operator can confirm that the endoscope tip end 71 is positioned in the balloon part, with the endoscope. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a balloon catheter for insertion into an obstructed part or stenotic part generated in a body cavity such as an oviduct.

Conventionally, an outer tube, an inner tube that can move in the outer tube in the axial direction, and one end are attached to the distal end of the outer tube, and the other end, in order to treat a blockage / stenosis that has occurred in the fallopian tube A balloon catheter provided with a balloon attached to the tip of the inner tube is used.
This balloon catheter is used as follows.
First, an endoscope is inserted into the lumen of the inner tube, and the distal end of the endoscope reaches the distal end of the outer tube. Then, with the balloon completely housed in the lumen of the outer tube, the balloon catheter is inserted into the uterus from the uterine jaw. Then, after confirming the fallopian tube opening with an endoscope, the inner tube is pushed into the distal end side, the balloon is protruded from the distal end of the outer tube, and the balloon is inserted into the fallopian tube. Then, the lesioned part is expanded (treated) with a balloon while observing a lesioned part such as an obstructed part or a stenotic part with an endoscope.

In order to perform these operations safely, it is necessary to always know the position of the distal end portion of the endoscope relative to the distal end portion of the balloon. That is, it is necessary to prevent damage to organs in the living body such as the uterus and fallopian tube due to the projection of the endoscope from the end of the balloon on the tip side.
In order to satisfy these requirements, Japanese Patent No. 2813463 discloses that marks are provided at equal intervals on the inner tube of the balloon catheter and the proximal side of the endoscope, and by counting these marks, the balloon A catheter device that determines the position of the endoscope in the longitudinal direction relative to the distal end portion of the endoscope is disclosed.
Japanese Patent No. 2813463

However, this catheter device cannot confirm whether or not the endoscope protrudes from the end portion on the distal end side of the balloon in the endoscope image. In order to check whether or not the endoscope protrudes from the tip end of the balloon, once the eyes are removed from the monitor image of the endoscope, the number of marks on the inner tube and the endoscope is determined. Since it is necessary to count, it takes time for the confirmation work, and there is a risk of projection of the endoscope due to miscounting. Further, since the eyes are temporarily removed from the endoscope image, there is a problem in terms of safety when operating the balloon catheter.
Accordingly, an object of the present invention is to provide a balloon catheter capable of easily confirming whether the distal end portion of the endoscope is inside or outside the balloon in an image obtained from the endoscope.

What achieves the above object is as follows.
(1) an outer tube, an inner tube movable in the outer tube in the axial direction, one end attached to the tip of the outer tube, the other end attached to the tip of the inner tube, and the inner tube A balloon catheter that can be housed in the endoscope, wherein the balloon catheter can be inserted into the living body through the inner tube and the balloon catheter tip so that the tip end of the endoscope can be inserted into the living body, and The balloon is formed in a color in which the endoscope can be confirmed to be located in the balloon portion by the endoscope.
(2) The balloon catheter according to (1), wherein the balloon is formed in the color that can be confirmed by being colored.
(3) The balloon catheter according to (1) or (2), wherein the color that can be confirmed is a color other than red and white.
(4) The balloon catheter according to any one of (1) to (3), wherein the color that can be confirmed is any of green, yellow, and blue.
(5) The balloon catheter according to any one of (1) to (4), wherein the balloon is in a state of being divided by a plurality of different identifiable colors.
(6) The balloon catheter according to any one of (1) to (4), wherein the balloon is in a state of being divided into three or more by a plurality of three or more colors that can be confirmed.
(7) The balloon is formed with a plurality of first color regions formed with a first confirmable color, and between the first color regions and with a confirmable color different from the first color region. The balloon catheter according to any one of (1) to (4), wherein the balloon catheter is provided with a second color region.
(8) The balloon is formed between a plurality of first color regions having a first confirmable color and a wide width, and the first color region can be confirmed different from the first color region. The balloon catheter according to any one of (1) to (4), wherein the balloon catheter is provided with a second color region having a color and a narrow width.
(9) The balloon catheter according to any one of (1) to (8), wherein the balloon catheter is a balloon catheter for insertion into the fallopian tube.

The balloon catheter of the present invention has an outer tube, an inner tube movable in the outer tube in the axial direction, one end attached to the distal end of the outer tube, and the other end attached to the distal end of the inner tube. And a balloon catheter that can be accommodated in the outer tube, and the balloon catheter can be inserted into the living body through the inner tube and the balloon catheter tip from the tip of the balloon catheter. And the balloon is formed in a color that allows the endoscope to confirm that the distal end portion of the endoscope is located in the balloon portion.
For this reason, in the image obtained from the endoscope, it is possible to easily confirm whether the distal end portion of the endoscope is inside or outside the balloon.
Further, the color that can be confirmed is preferably a color other than red and white. By doing so, the inside of the balloon and the inside of the living body can be easily discriminated by the endoscopic image.
Moreover, it is preferable that the color which can be confirmed is either green, yellow or blue. By doing so, the inside of the balloon and the inside of the living body can be easily discriminated by the endoscopic image.
The balloon is preferably in a state of being divided by a plurality of different colors that can be confirmed. By doing in this way, it becomes possible to grasp | ascertain the length of the balloon which protrudes from an outer tube | pipe.
Moreover, it is preferable that the balloon is in a state of being divided into three or more by three or more different colors that can be confirmed. By doing in this way, it becomes possible to grasp | ascertain the length of the balloon which protrudes from an outer tube | pipe easily.
In addition, the balloon is formed between a plurality of first color regions formed with a first confirmable color, and between the first color regions and formed with a confirmable color different from the first color. It is preferable that a two-color region is provided. By doing in this way, it becomes possible to grasp | ascertain the length of the balloon which protrudes from an outer tube | pipe easily.
In addition, the balloon has a plurality of first color regions that are formed in a wide range with a first identifiable color and a width that is formed between the first color regions, and a identifiable color that is different from the first color region. In addition, it is preferable that the second color region having a narrow width is provided. By doing in this way, it becomes possible to grasp | ascertain the length of the balloon which protrudes from an outer tube | pipe easily.

The balloon catheter of this invention is demonstrated using an Example.
FIG. 1 is an external view of a balloon catheter according to an embodiment of the present invention. FIG. 2 is an external view of the balloon catheter with the outer tube removed from the balloon catheter shown in FIG. FIG. 3 is a partially enlarged sectional view of the distal end portion of the balloon catheter according to the embodiment of the present invention. FIG. 4 is a partially enlarged sectional view of the distal end portion of a balloon catheter according to another embodiment of the present invention. FIG. 5 is a partially enlarged sectional view of the distal end portion of a balloon catheter according to another embodiment of the present invention.
The balloon catheter 1 of the present invention includes an outer tube 2, an inner tube 3 that can move in the outer tube 2 in the axial direction, one end attached to the distal end of the outer tube 2, and the other end of the inner tube 3. And a balloon 4 that can be stored in the outer tube 2. The balloon catheter 1 allows the distal end portion 71 of the endoscope 70 to be inserted into the living body from the distal end of the balloon catheter 1 by passing through the inner tube 3 and the balloon 4, and the balloon 4 is inserted into the endoscope 70. Thus, the endoscope tip 71 is formed in a color that can be confirmed to be located in the balloon portion.
The balloon catheter of the present invention will be described with reference to an embodiment in which the balloon catheter for expanding the fallopian tube stenosis is applied.
The balloon catheter 1 of this embodiment includes an outer tube 2, an inner tube 3 that can move in the outer tube 2 in the axial direction, one end attached to the tip of the outer tube 2, and the other end of the inner tube 3. And a balloon 4 attached to the section. The balloon catheter 1 includes a curved portion 2 a formed on the distal end side of the balloon catheter 1. Specifically, a curved portion 2a is formed at a position a predetermined distance from the distal end of the outer tube 2, and the curved portion 2a allows the distal end of the balloon catheter 1, in other words, the distal end of the outer tube 2 to be The center axis of the outer cylinder 5 is shifted by a predetermined distance. The position of the bending portion 2a is not particularly limited, but is preferably 10 to 50 mm from the distal end of the outer tube 2 and located on the proximal end side. The shape of the curved portion 2a is not particularly limited, but an arc shape is preferable.

As shown in FIGS. 1 to 3, the outer tube 2 includes an outer tube main body 21, a distal end member 22 fixed to the distal end of the outer tube main body 21, and an outer tube hub fixed to the proximal end of the outer tube main body 21. 23.
The outer tube main body 21 is a tube body including an internal passage that penetrates from the distal end to the proximal end. The outer tube main body 21 is a tube body having substantially the same outer diameter from the distal end to the proximal end.
The outer tube body 21 preferably has an outer diameter of about 2 to 10 mm, more preferably about 2.3 to 8 mm, and an inner diameter of about 1.2 to 7.8 mm, more preferably. Is about 1.5 to 5.8 mm, and the length is preferably about 100 to 1500 mm, more preferably about 200 to 1000 mm.

The outer tube main body 21 includes, for example, polyolefins such as polypropylene and polyethylene, and olefin elastomers (for example, polyethylene elastomer and polypropylene elastomer), polyesters such as polyethylene terephthalate, soft polyvinyl chloride, polyurethane and urethane elastomers, polyamide and amide elastomers. (For example, polyamide elastomer), polytetrafluoroethylene and fluororesin elastomer, polyimide, ethylene-vinyl acetate copolymer, silicone rubber, or other flexible polymer material.
And the curved part 2a is formed in the position used as a base end predetermined distance (specifically 10-50 mm, preferably 20-40 mm) from the front-end | tip of the outer pipe | tube main body 21. FIG. The degree of bending is preferably such that the angle between the central axis of the distal end portion of the outer tube main body 21 and the central axis of the rear end portion of the outer tube main body 21 is about 100 to 160 °. In particular, the angle is preferably 110 to 150 °.

  Further, a marker 24 is provided on the side surface on the distal end side of the outer tube 2. In the balloon catheter 1 of this embodiment, the marker 24 is formed at a position that is slightly proximal to the curved portion 2 a of the outer tube 2. A plurality of markers are provided, and 3 to 10 markers are particularly preferably provided. Moreover, when providing three or more markers, it is preferable to make each interval substantially equal. Further, when a plurality of markers are provided, it is preferable that adjacent markers can be distinguished. Specifically, changing the thickness of the adjacent marker, changing the shape of the adjacent marker, and the like can be considered. The marker 24 may be radiopaque. When the marker 24 is made radiopaque, it can be formed by applying a resin containing a radiopaque substance to the outer surface of the outer tube 2.

The tip member 22 fixed to the tip of the outer tube main body 21 preferably has a shape as shown in FIG. The distal end member 22 has a curved distal end surface so as not to damage the inner wall of the body cavity when inserted into the living body. Furthermore, the distal end member 22 is bent so that the inner passage approaches a direction parallel to the central axis on the proximal end side from the curved portion of the outer tube 2. The tip member 22 may be one in which the internal passage is not bent.
As the forming material of the tip member 22, those described in the outer tube main body 21 can be preferably used.

A balloon fixing member 25 is fixed to the distal end of the outer tube main body 21 as shown in FIG. Specifically, the base end of the cylindrical balloon fixing member 25 is fixed to an annular small diameter portion 21 b formed at the distal end of the outer tube main body 21. The proximal end of the above-described distal end member 22 is fixed to the proximal end of the balloon fixing member 25.
As the material for forming the balloon fixing member 25, the material described in the outer tube main body 21 can be preferably used.

  The outer tube hub 23 provided at the rear end of the outer tube main body 21 includes a passage for inserting the inner tube 3 and a fluid injection port 26 for a balloon. Furthermore, the balloon catheter 1 has a fixing function for releasably fixing the inner tube 3 to the outer tube 2. Specifically, the outer tube hub 23 includes an inner tube fixing screw 28 that presses the inner tube 3. The balloon fluid injection port 26 communicates with a balloon expansion lumen 21 a formed between the inner surface of the outer tube main body 21 and the outer surface of the inner tube main body 31. The rear end of the outer tube main body 21 is inserted and fixed in the front end of the outer tube hub 23.

  The outer tube hub 23 and the inner tube fixing screw 28 are made of polycarbonate, acrylic resin (polyacrylate (for example, polymethyl methacrylate), polyetherimide, polyacrylamide, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer. Etc.), polyester (eg, polyethylene terephthalate, polybutylene terephthalate), polyolefin (eg, polyethylene, polypropylene, ethylene-propylene copolymer), styrene resin (polystyrene, methacrylate-styrene copolymer, methacrylate-butylene-styrene copolymer) , Hard or semi-rigid resins such as polyvinyl chloride (eg, hard vinyl chloride), polyamide, polysulfone, polyarylate, stainless steel, titanium It can be formed of a metal such as titanium alloy.

As shown in FIGS. 1 to 3, the inner tube 3 includes an inner tube main body 31 and an inner tube hub 32 fixed to the proximal end of the inner tube main body 31.
The inner pipe main body 31 is a tube body having an internal passage that penetrates from the distal end to the base end, and is movable within the outer pipe main body 21. In the normal state, the distal end of the inner tube main body 31 is located on the rear end side by a predetermined distance from the distal end of the outer tube 2. The outer diameter of the inner tube main body 31 is preferably about 0.8 to 6.8 mm, more preferably about 1 to 5 mm, and the wall thickness is preferably about 0.025 to 1 mm, more preferably. Is about 0.03 to 0.5 mm, and the length is preferably about 100 to 1500 mm, more preferably about 200 to 1000 mm.
The inner pipe main body 31 is made of, for example, a metal pipe such as stainless steel, titanium, or a titanium alloy, or a relatively hard material such as polyamide, PTFE (polytetrafluoroethylene), ETFE, FEP, or PFA. Preferably it is formed.

The inner tube hub 32 includes a liquid injection port 33 communicating with the inner tube main body 31 and an internal passage for inserting a medical linear body such as a guide wire and an endoscope. From the liquid injection port 33, a perfusate for smoothing the movement of the medical linear body in the lumen of the inner tube 3 is injected.
As the material for forming the inner pipe hub 32, those described in the outer pipe hub 23 can be preferably used.

  The balloon 4 is formed in a color that allows the endoscope 70 to confirm that the endoscope distal end portion 71 is located within the balloon portion. The color of the balloon is preferably a color other than red and white. By not using the colors of these systems, it is easy to confirm whether the distal end portion, which is the viewing portion of the endoscope, is located inside the balloon of the catheter or is exposed in the living body. Furthermore, the color of the balloon is preferably any of green, yellow or blue. By doing in this way, it becomes easier to confirm whether the tip part which is a visual recognition part of an endoscope is located inside the balloon of a catheter, or is exposed in the living body. In other words, while the color of the balloon is projected in the endoscopic image, the endoscope is positioned in the balloon, and when a color other than the color of the balloon is projected in the endoscopic image It is very easy to confirm that the endoscope protrudes from the end portion on the tip side of the balloon. Thus, since it can be easily confirmed that the distal end portion of the endoscope protrudes from the balloon (catheter), damage to organs in a living body such as the uterus and fallopian tube due to excessive protrusion of the distal end portion of the endoscope is prevented. be able to. In the balloon catheter of the embodiment shown in FIG. 3, the balloon 4 is entirely formed in the same color.

  The balloon 4 is for expanding the stenosis in the body cavity, and one end is attached to the distal end portion of the outer tube 2 and the other end is attached to the distal end portion of the inner tube 3. The balloon 4 is joined to either the outer periphery or the inner periphery of each of the distal end portion of the outer tube 2 and the distal end portion of the inner tube 3. As shown in FIG. 3, the balloon 4 is preferably joined at one end to the tip of the outer tube 2 and the other end is folded into the lumen of the outer tube 2 and joined to the tip of the inner tube 3. In the balloon catheter 1 of this embodiment, the entire balloon 4 can be stored in the outer tube 2. Further, the balloon 4 can protrude from the outer tube 2 by moving the inner tube 3 to the distal end side.

The balloon 4 is foldable and preferably has an outer diameter of about 0.5 to 10 mm, more preferably about 1 to 3 mm.
One end of the balloon 4 is fixed inside the outer tube 2 that is slightly proximal to the distal end of the outer tube 2, and the fixing portion of the one end of the balloon 4 to the outer tube 2 is not exposed to the outside. Preferably it is.
Specifically, in the balloon catheter 1 of this embodiment, as shown in FIG. 3, one end of the balloon 4 is fixed to the tip of a cylindrical balloon fixing member 25 provided on the outer tube 2. Has been. The fixing means is not particularly limited, and may be performed, for example, using an adhesive or by fusion.

In the balloon catheter 1 of this embodiment, as shown in FIG. 3, the other end of the balloon 4 is fixed to the tip of the inner tube 3 (specifically, the tip of the inner tube main body 31). ing. In particular, the other end portion of the balloon 4 is a small diameter portion, and the inner diameter is substantially equal to the outer diameter of the inner tube 3. The tip of the inner tube 3 is inserted into the small diameter portion, and the balloon 4 is fixed to the inner tube 3. The fixing means is not particularly limited, and may be performed, for example, using an adhesive or by fusion.
The material of the balloon 4 is, for example, natural rubber, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, soft polyvinyl chloride, polyurethane, polyisoprene, polyamide, polyamide elastomer, polyimide, polytetrafluoro. Ethylene, polyimide elastomer, silicone and the like can be mentioned, and polyamide elastomer is preferable.

  In the balloon catheter of this embodiment, the balloon 4 is formed in a single color, but is not limited to this. The balloon may be in a state of being divided by a plurality of different identifiable colors. In this way, by setting the state divided by a plurality of different colors that can be confirmed, it is possible to determine how far the balloon protrudes from the tip of the outer tube (in other words, the protruding length of the balloon from the outer tube). It becomes possible to confirm with the image.

  In the balloon catheter of the embodiment shown in FIG. 4, the balloon 4 is in a state of being divided into three or more by three or more different colors that can be confirmed. In this embodiment, the balloon 4 is in a state of being divided into three by three different identifiable colors. The balloon 4 includes a first color region 4a, a second color region 4b located at the base end of the first color region, and a third color region 4c located at the base end of the second color region from the distal end side of the balloon. I have. The length of the first color region (in other words, the tip region) 4a is preferably about 1/4 to 1/2 of the balloon 4. The length of the second color region (in other words, the intermediate region) 4b is preferably about 1/4 to 1/2 of the balloon 4. The length of the third color region (in other words, the rear end region) 4 c is preferably about ¼ to ½ of the balloon 4. The color of each region is preferably any of green, yellow or blue. It is preferable that the color of each region is any one of the above-described green, yellow, and blue colors, and that each color system is different. Also, the plurality of regions may all be formed in the same color system and may have different color densities. Specifically, it may be formed so that the color becomes darker or thinner toward the tip side of the balloon. The balloon 4 may be in a state of being divided into four or more by four or more identifiable colors.

In the balloon catheter of the embodiment shown in FIG. 5, the balloon 4 is formed between a plurality of first color regions 47 formed by the first identifiable color and the first color region 47 and is different from the first color. And a second color region 48 formed of a color that can be confirmed. In particular, in this embodiment, the balloon 4 is formed between a plurality of first color regions 47 that are formed in a first confirmable color and wide, and the first color region 47, and is different from the first color. And a second color region 48 having a narrow color and a color that can be confirmed.
By providing the second color region in this way and counting the number of second color regions that have passed until the endoscope protrudes from the distal end of the balloon catheter when the endoscope is inserted, the balloon is more than the distal end of the outer tube. It is possible to confirm how much the projection is (in other words, the projection length of the balloon from the outer tube).

The color of the first color region is preferably green, yellow, or blue. Further, the color of the second color area is any of green, yellow, and blue, and the color system different from the color system of the first color area or the same color system as the first color area It is preferable that the color density is different. Further, when the second color region is formed with a narrow width, black may be used.
The number of first color regions is preferably about 3 to 20, particularly 6 to 10. Further, the number of the second color regions is preferably about 2 to 19, and 5 to 9 is particularly preferable. The width of the first color region is preferably about 1/20 to 1/3 of the total length of the balloon, and particularly preferably 1/10 to 1/6. In addition, the width of the second color region is preferably about 1 mm to 10 mm, and particularly preferably 3 mm to 5 mm.

  The balloon can be colored, for example, by adding a colorant to the balloon forming material. The balloon forming material is as described above. In addition, dyes and pigments used as colorants include inorganic pigments such as Bengala and Stronel Green, organic pigments such as quinacridone, perylene, anthraquinone, carbon black, and dyes such as perylene, perinone, Examples are anthraquinone and heterocyclic systems. Moreover, you may form the coloring of a balloon by laminating | stacking a colored layer on the resin base material layer of a balloon. The colored layer can be formed by adding the above-described colorant to a resin material having adhesiveness with the balloon-forming material. In particular, the resin material of the colored layer preferably has a soft film forming property.

Further, the balloon catheter 1 of the present invention is provided with an outer tube 5 as shown in FIGS.
As shown in FIGS. 1 and 3, the outer cylinder 5 includes an outer cylinder main body 51 and an outer cylinder hub 52 fixed to the base end of the outer cylinder main body 51.
The outer cylinder 5 partially encapsulates the outer tube main body 21 and can move along the axial direction of the outer tube 2, and can store and expose the curved portion 2 a of the outer tube 2. Further, the outer cylinder 5 is configured such that the bending portion 2a can be made substantially straight by accommodating the bending portion 2a of the outer tube 2.

The outer cylinder main body 51 is a tube body provided with an internal passage penetrating from the distal end to the proximal end, and is movable on the outer tube main body 21. The outer cylinder main body 51 is a tube body having substantially the same outer diameter from the distal end to the proximal end. The outer diameter of the outer cylinder main body 51 is preferably about 2.2 to 12 mm, more preferably about 2.5 to 8.2 mm, and the thickness is preferably about 0.05 to 1 mm. More preferably, it is about 0.1-0.3 mm, and it is preferable that the length is about 90-1300 mm, More preferably, it is about 190-900 mm.
The outer cylinder main body 51 is preferably formed of a relatively hard material such as a fluorine-based resin such as polyamide, PTFE (polytetrafluoroethylene), ETFE, FEP, or PFA.

The outer cylinder hub 52 functions as an operation unit when operating the outer cylinder 5. By providing such an outer cylinder hub 52, the operation of the outer cylinder 5 is facilitated.
The outer cylinder hub 52 is made of polycarbonate, acrylic resin (polyacrylate (for example, polymethyl methacrylate), polyacrylamide, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, etc.), polyester (for example, polyethylene terephthalate, poly Butylene terephthalate), polyolefin (eg, polyethylene, polypropylene, ethylene-propylene copolymer), styrenic resin (polystyrene, methacrylate-styrene copolymer, methacrylate-butylene-styrene copolymer, polyvinyl chloride (eg, hard vinyl chloride) , Polyamide, polyamide elastomer, polysulfone, polyarylate and other hard or semi-rigid resins, stainless steel, titanium or titanium alloys It can be formed by the genus.

  And in the balloon catheter 1 of this Example, as shown in FIG.1 and FIG.2, the operation part 6 is provided in the rear end of the inner tube | pipe 3. As shown in FIG. The operation unit 6 operates a medical linear body such as an endoscope or a guide wire inserted into the inner tube 3.

Next, a method for using the balloon catheter of the present invention will be described.
First, an endoscope is inserted through the operation unit 6 attached to the rear end of the inner tube, and the endoscope is advanced through the lumen of the inner tube 3 by using the operation unit 6. The tip is made to reach the tip of the outer tube 2. Then, as shown in FIG. 6, the outer tube 5 is moved to the distal end side of the outer tube 2, the curved portion 2a of the outer tube 2 is accommodated in the outer tube 5, the balloon catheter 1 is substantially linear, and The tip of the outer tube 2 is projected from the outer tube 5. Then, the balloon catheter 1 prepared in this way is inserted over the uterine jaw until the distal end of the outer tube 2 reaches the uterus. Thus, since the balloon catheter 1 can be inserted into the living body in a substantially straight state, the insertion operation is easy and the inner wall of the body cavity to be inserted is less likely to be damaged. When the balloon catheter 1 is inserted into the uterus, the balloon 4 is completely stored in the outer tube 2, and the inner tube 3 is fixed to the outer tube 2 by the inner tube fixing screw 28. To be in a state.

  And after completion | finish of said insertion operation | movement, the outer cylinder 5 is pulled to the rear end side, the curved part 2a is exposed in the uterus, and the front-end | tip of the outer tube | pipe 2 is located in a fallopian tube mouth. Then, the inner tube 3 is released from fixing to the outer tube 2 (specifically, the screwing of the fixing screw is loosened), the liquid is injected into the lumen 21a from the balloon fluid port, and the balloon expanding lumen is removed. Pressurized. Then, the inner tube 3 is pushed into the distal end side, the inner tube 3 and the balloon 4 are moved to the distal end side, and the balloon 4 is projected from the distal end of the outer tube 2 as shown in FIG. Insert into the tube. At this time, the endoscope also moves to the distal end side in conjunction with the balloon 4. Since the balloon 4 is inverted by protruding, the distance between the distal end of the endoscope and the distal end of the balloon 4 is reduced. Note that in the endoscopic image, the color of the balloon is reflected in the state where the distal end portion of the endoscope is shown by the solid line in FIG. 8, and when the tip end of the balloon is reached as shown by the broken line. After the reflection of the color of the balloon is finished, the normal color image is displayed. In such an endoscopic image, after confirming that the tip of the endoscope has reached the tip of the balloon 4, the inside of the fallopian tube is observed with the endoscope. After the observation, the pressure in the lumen for balloon expansion is lowered, and the endoscope is slightly pulled back using the operation unit 6. At that time, in order to smooth the movement of the endoscope within the lumen of the inner tube 3, a perfusate is injected from a liquid injection port 33 provided in the inner tube hub 32. Then, the pressure in the balloon expansion lumen is increased again, the inner tube 3 is pushed toward the distal end side, and the balloon 4 is further projected. After confirming again that the tip of the endoscope has reached the tip of the balloon 4 in the endoscopic image, the inside of the fallopian tube is observed with the endoscope. This operation is repeated until the protruding length of the balloon 4 passes through the affected area.

  Thereafter, the pressure in the balloon expansion lumen is reduced, the distal end of the endoscope is always aligned with the distal end of the balloon 4 using the operation unit 6, the inner tube 3 is pulled back while observing the inside of the fallopian tube, and the balloon 4 is Store in the outer tube 2. Then, the outer tube 5 is moved to the distal end side of the outer tube 2 so that the curved portion 2a of the outer tube 2 is accommodated in the outer tube 5, the balloon catheter 1 becomes substantially linear, and the distal end portion of the outer tube 2 The balloon catheter 1 is withdrawn from the body so as to protrude from the outer cylinder 5.

FIG. 1 is an external view of a balloon catheter according to an embodiment of the present invention. FIG. 2 is an external view of the balloon catheter with the outer tube removed from the balloon catheter shown in FIG. FIG. 3 is an enlarged sectional view of the distal end portion of the balloon catheter according to the embodiment of the present invention. FIG. 4 is an enlarged cross-sectional view of the distal end portion of a balloon catheter according to another embodiment of the present invention. FIG. 5 is an enlarged cross-sectional view of the distal end portion of a balloon catheter according to another embodiment of the present invention. FIG. 6 is an explanatory diagram for explaining the operation of the balloon catheter of the present invention. FIG. 7 is an explanatory diagram for explaining the operation of the balloon catheter of the present invention. FIG. 8 is an explanatory diagram for explaining the operation of the balloon catheter of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Balloon catheter 2 Outer tube 2a Bending part 3 Inner tube 4 Balloon 5 Outer cylinder 6 Operation part

Claims (9)

An outer tube, an inner tube that can move in the axial direction in the outer tube, one end is attached to the tip of the outer tube, the other end is attached to the tip of the inner tube, and can be stored in the outer tube A balloon catheter comprising: a balloon catheter, wherein the balloon catheter can be inserted into a living body through the inner tube and the balloon catheter by passing the balloon through the balloon catheter tip; The balloon catheter is characterized in that it is formed in a color that allows the endoscope to be confirmed to be located in the balloon portion by the endoscope. The balloon catheter according to claim 1, wherein the balloon is formed in the color that can be confirmed by being colored. The balloon catheter according to claim 1 or 2, wherein the color that can be confirmed is a color other than red and white. The balloon catheter according to any one of claims 1 to 3, wherein the color that can be confirmed is any one of green, yellow, and blue. The balloon catheter according to any one of claims 1 to 4, wherein the balloon is divided by a plurality of different colors that can be confirmed. The balloon catheter according to any one of claims 1 to 4, wherein the balloon is in a state of being divided into three or more by three or more different colors that can be confirmed. The balloon has a plurality of first color regions formed with a first identifiable color and a second color region formed between the first color regions and a identifiable color different from the first color region. The balloon catheter according to any one of claims 1 to 4, wherein the balloon catheter is provided with a color region. The balloon has a plurality of first color regions having a wide width and a first recognizable color, and is formed between the first color regions and has a recognizable color different from the first color region. The balloon catheter according to any one of claims 1 to 4, wherein the balloon catheter is provided with a second color region having a narrow width. The balloon catheter according to any one of claims 1 to 8, wherein the balloon catheter is a balloon catheter for insertion into the fallopian tube.

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