JPS63252166A - Balloon catheter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a balloon catheter, and more particularly to a balloon catheter inserted into a body cavity through a channel of an endoscope.

[Prior Art] One example of conventional balloon catheters of this type is the 6th balloon catheter.
It was configured as shown in the figure. That is, the balloon catheter 41 includes a catheter body 42 which is a tube body and has a liquid supply hole 44 and an air supply hole 45 formed inside thereof along the tube wall in the tube axis direction, and a catheter body 42 having a tube-shaped catheter body 42 having a liquid supply hole 44 and an air supply hole 45 formed along the tube wall in the tube axis direction. A pipe-shaped balloon 43 that can be expanded and contracted is airtightly bonded to the front and rear ends 43a and 43b, respectively, and a biped balloon 43 is inserted into the catheter body 42 between the front and rear ends 43a and 43b. An opening 45a is connected to the tip of the air hole 45, and an air feeding device such as a syringe is connected to the base end (not shown) of the air hole 45 to supply air. has been done.

The balloon catheter ±1 configured in this manner is inserted into a body cavity through a channel for inserting a treatment tool in an endoscope, and is connected to the chain line 43 by supplying air through the air supply hole 45.
As shown by ', the balloon 43 is inflated and fixed by pressing against the inner wall of the body cavity, the inside of the body cavity in front and behind the balloon 43 is blocked, and a contrast medium is injected into the blocked body cavity through the liquid feeding hole 44. It is designed to inject liquid medicine into the body.

[Problems to be Solved by the Invention] However, in the conventional balloon catheter as described above, both the front and rear ends 43a and 43b of the balloon 43 are higher than the outer circumferential surface of the catheter body 42;
For example, when the balloon 43 passes through a forceps device (not shown) of an endoscope, both front and rear end surfaces of the balloon 43 are caught by the device, causing the balloon to peel off, or in extreme cases, fall off.

Therefore, as a countermeasure against this problem, conventionally,
As shown in Japanese Patent No. 875, there is a balloon which is fixed by covering the outer circumferential surfaces of both front and rear ends of the balloon with metal fixtures. However, when the balloon is fixed with a metal fixture in this manner, there is a risk that the balloon may be damaged by the edges or edges of the metal fixture. Also, US Patent USP37460
As disclosed in Japanese Patent No. 03, there is a device in which the position corresponding to the end of the balloon is made partially (or the entire balloon part) thinner by thermoforming means, but when made thinner in this way, the air holes and the liquid feed hole become thinner. This has the disadvantage of closing or narrowing the hole.

Furthermore, as shown in Japanese Patent Publication No. 61-24023, there are products in which a special resin is added and the level difference is eliminated using special technical means, but this method is extremely troublesome and requires special technology. It was necessary.

The present invention has been made in view of the above-mentioned drawbacks of conventional balloon catheters, and provides a balloon catheter that extremely easily eliminates the problem of peeling due to the difference in level between the adhesive portions of the balloon at both ends to the catheter body. The purpose is to provide

[Means and effects for solving the problems] The present invention has the following features:
In order to achieve the above object, an annular convex portion having an outer diameter at least equal to or larger than the outer diameter of the end of the balloon is formed on the outer circumferential surface of the catheter main body before and after the balloon.

[Example] FIG. 1 is a cross-sectional view showing the front end and rear end of a balloon catheter according to a first example of the present invention, with the magnifications changed. This balloon catheter 1 is
From a double tube body consisting of an outer tube 3 consisting of a mantle tube and a liquid feeding tube 4 which is disposed in the tube axis direction within the outer tube 3 and is airtightly fixed to the outer tube 3 via a distal tip 5 at the tip. A catheter body 2, a pipe-shaped balloon 11 having both front and rear ends 11a and flb hermetically adhered to the outer circumferential surface of the distal end of the catheter body 2, and a pipe-shaped balloon 11 between the front and rear ends 11a and flb of the balloon 11. The opening 12 a is provided in the outer tube 3 and communicates with an air passage 12 formed by the gap between the outer tube 3 and the liquid feeding tube 4 .

The outer tube 3 forming the outer tube of the catheter main body 2 and the liquid feeding tube 4 inserted into the outer tube are airtightly fixed at their respective distal ends via a distal tip 5 made of an X-ray opaque material. has been done. Inside the rear end portion 11b of the balloon 11 on the outer tube 3, a ring-shaped curved tube 6 made of an X-ray opaque material is placed in pressure contact with the inner peripheral surface. As a result, the outer tube 3 is formed with a ring-shaped first convex portion 7 that is higher than the outer circumferential surface. Further, at the rear end of the tip 5, there are a first step 8 into which the tip of the liquid feeding tube 4 is fitted, and a second step 9 into which the tip of the outer tube 3 is fitted. The outer circumferential surface of the outer tube 3 on the second step portion 9 is
It is made to be higher than the outer circumferential surface of the outer tube 3 on the first stepped portion 8, thereby forming a second convex portion 10. Both front and rear ends 11a, llb of the balloon 11 are located inside the front and rear convex portions 10.7 on the outer circumferential surface of the outer tube 3 in which the second convex portion 10 and the first convex portion 7 are formed. The outer diameters of the convex portions 10.7 are bonded and fixed in an airtight manner so that they are not higher than the outer diameters of the convex portions 10.7. In the balloon catheter 1 configured in this manner, the outer diameters of the front and rear ends of the bonded balloon 11 are lower than the outer diameters of the front and rear catheter bodies 2, so that, for example, an endoscope forceps lifting device (not shown) Balloon 1
1 will no longer get caught and peeled off at both the front and rear ends.

Note that, as shown in FIG. 1, a fixing member 13 is attached to the rear end of the catheter body 2. Liquid feeding cap 14. Through the air supply cap 15, the liquid supply pipe 4. The air supply path 12 is connected to a liquid supply device and an air supply device (not shown) for supplying liquid and air, respectively.

Next, the operation on the balloon catheter constructed in this way will be explained based on FIG. 2.3. As shown in FIG. 2, the balloon catheter 1 is inserted into a body cavity through a channel of an endoscope 16, for example, into the bile duct 18 from the duodenal papilla 17a. Next, balloon 11 is
The air supply device (
), the incision 1 of the duodenal papilla 17a is expanded into a predetermined shape as shown in the figure.
Close 9. For example, a contrast medium or the like is injected into the bile duct 18 with the U section closed by a liquid feeding device (not shown) connected to the liquid feeding mouthpiece 14 via the liquid feeding pipe 4 of the catheter body 2. Then, the bile duct 18 is imaged. In addition to injecting a contrast medium, a drug solution, etc. as described above, the balloon catheter 1 can also be used in the direction of the arrow with the balloon 11 inflated after being inserted into the bile duct 18, as shown in FIG. By pulling, bile sludge, gallstones 20, etc. in the bile duct 18 can be pulled out into the duodenum 17 and excreted.

As described above, even when the balloon catheter is inserted into a body cavity and various operations are performed, the outer circumferential surface of the front and rear ends of the balloon 11 is the second one of the adjacent catheter body 2, as described above. Since it is lower than the outer peripheral surface of the first convex portion 10.7, it will not get caught and peel off. Furthermore, since the distal tips 5, 5 and tube 6 are made of an X-ray opaque material, the position of the balloon 11 can be accurately confirmed under X-ray fluoroscopy. Furthermore, since the tube 6 is installed inside the outer tube 3, the first convex portion 7 will not damage the body cavity wall.

FIG. 4 is a sectional view of the distal end of a balloon catheter showing a second embodiment of the present invention. The balloon catheter 21 in this embodiment is the balloon catheter 1 shown in FIG.
Since the structure is substantially the same as that of the first embodiment, the same reference numerals are used for the same constituent members, and the explanation thereof will be omitted. In the balloon catheter 21 of this embodiment, the outer tube 3 of the catheter body 2 and the liquid feeding tube 4 are directly fixed together at the distal end, and the outer tube 3 is the same as that of the balloon catheter 1 shown in FIG. 1. Rings 23, 22 are provided inside at positions corresponding to the second protrusions 7, 10, thereby causing the first.
A second convex portion 24,25 is formed.

Balloon catheter 2 of this embodiment configured in this way
1, ]22 Both front and rear ends 11a of the balloon 11 are bonded in exactly the same way as the balloon catheter 1 shown in FIG.
Since the outer diameters of the catheter body 2 and the outer diameter of the catheter body 2 are lower than the outer diameter of the catheter body 2, the balloon 11 will not be peeled off due to the front and rear ends of the balloon 11 being caught when inserted into a body cavity.

FIG. 5 is a sectional view of the distal end of a balloon catheter showing a third embodiment of the present invention. This balloon catheter 3
1 in the balloon catheter 11 of FIG. 4 above. Convex M32 corresponding to the second convex portion 24.25
, 33 are formed integrally with the outer tube 3 by molding without fitting a ring or the like therein.

Moreover, its operation and effect are the same as those of the balloon catheter 21 described above, and the stability of quality and productivity are further improved.

[Effects of the Invention] As explained above, according to the present invention, since the outer diameter of both ends of the balloon is lower than the outer diameter of the catheter body, for example, when passing through a forceps lifting device of an endoscope, etc., there is no fear that the ends of the balloon will get caught in the biped device and the balloon will peel off, tear, or fall off. Further, since the convex portion is provided partially along the entire length of the catheter body, the entire catheter body does not become hard.

Furthermore, since the distal tip, curved tube, ring, etc. are made of an X-ray opaque material, the position of the balloon can be accurately confirmed under X-ray fluoroscopy, and this balloon eliminates the drawbacks of conventional balloon catheters of this type. A catheter can be provided.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a balloon catheter showing a first embodiment of the present invention, FIGS. 2 and 3 are usage diagrams for explaining the operation of the balloon catheter shown in FIG. 1, and FIG. 5 is a sectional view of the distal end of a balloon catheter showing a third embodiment of the present invention. FIG. 6 is a sectional view of the distal end of a balloon catheter showing a third embodiment of the present invention. FIG. 2 is a cross-sectional view of the distal end of an example of a balloon catheter. 1.21.31...Balloon catheter 2...Catheter body 4...Liquid feeding tube (fluid conduit) 7...・・・
...First convex part (annular convex part) 10... Second
Convex portion (〃) 11...Balloon 12...Air supply line (fluid pipe) Issue 4 Figure 6 Procedure Amendment (self-proposed) 1986 6
Month 180 1, Incident Display 1986 Patent Application No. 0861
No. 92 No. 2, Title of the invention Balloon catheter 3
, Relationship with the case of the person making the amendment Patent Applicant Location 2-43-2 Hatagaya, Shibuya-ku, Tokyo Name (037) Olympus Optical Industry Co., Ltd. 4o Agent Address 5-52-14 Matsubara, Hatagaya-ku, Tokyo
No. 5. Subject of amendment: "Claims column of specification, Detailed explanation of the invention column, Brief explanation of drawings column" 6. Contents of amendment (1) As shown in the attached sheet, the scope of claims has been revised. I'll change it. (Attachment) (2) r24.25J written on page 9, line 9 of the specification will be corrected to r25.24J. (3) r24.25J stated at the beginning of the third line of page 1O of the same
Correct it to r25,24J. (4) The r32.33J written in the third line of page 1O will be corrected to r33,32J. (5) "7..." stated at the beginning of line 18 on page 11 of the same
...", r7.25.33...
” will be corrected. (8) "10..." stated at the beginning of line 19 on page 11 of the same
......", rlO, 24, 32...
..." will be corrected. “2. Scope of claims

Claims (1)

[Claims] A catheter body has a fluid conduit for air supply and liquid supply in the tube axis direction, and the front and rear ends are fixed on the outer peripheral surface of this catheter body, and are expanded by air supply and are inflated by intake air. In a balloon catheter comprising a deflated balloon, an annular convex portion having an outer diameter at least equal to or larger than the outer diameter of the end of the balloon is formed on the outer circumferential surface of the catheter body before and after the balloon. Characteristic balloon catheter.