JPH1085337A - Medical catheter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical catheter which can be accurately introduced to a specified position of an organ in a living body. SOLUTION: Near the top of a main body 2 of the catheter, a guide balloon 4 capable of locally expanding outwardly one side of the peripheral wall of the main body 2 is arranged and the balloon 4 is singly communicated to a path way 6 formed in the main body 2 so as to be freely expandable or contractible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical catheter.

[0002]

2. Description of the Related Art In the past, medical catheters have been used, for example, when aspirating intestinal contents or injecting a drug solution into a patient with intestinal obstruction. This medical catheter has a total length of 2.5 to
Since it is quite long at 3 m and the whole is flexible, in most cases, a guide wire is inserted into a catheter and guided to a predetermined site of an organ in a living body.

[0003] However, even when the catheter is guided into the living body by the guide wire as described above, the catheter is turned around at the fundus (the stomach dome) to form a spiral, and the tip of the catheter is successfully moved along the greater curvature side. There was a problem that it was difficult to proceed toward the antrum and pass through the pylorus between the stomach and the duodenum.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a medical catheter capable of reliably guiding a predetermined position of an organ in a living body.

[0005]

According to the present invention, there is provided a guide balloon provided near the front end of a catheter body for locally inflating a single-sided area of a peripheral wall of the catheter body in the body. Characterized in that it is arranged so as to be able to expand and contract by communicating solely with the pipe line that has been set.

Further, at a position near the tip of the catheter body,
A pair of guide balloons for locally inflating both sides of the one side area and the other side area of the peripheral wall of the main body are respectively connected to the respective conduits provided in the main body independently. And are separately arranged so as to be able to expand and contract. The pair of guide balloons may be opposed to each other at the front and rear positions of the peripheral wall of the main body, and the pair of guide balloons may be arranged so as to be shifted back and forth along the longitudinal direction of the main body.

Further, each of the above-mentioned guide balloons is
A plurality of the main bodies may be arranged side by side along the longitudinal direction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS.
Reference numeral 1 denotes a medical catheter, and reference numeral 2 denotes a 2.5 to 3 m long catheter body made of silicone, natural rubber, PVC or the like. At the distal end of the catheter body 2, a plurality of spherical weights 3 made of iron, nickel, ceramic or the like are connected in series in order to give a predetermined weight to the distal end and facilitate insertion into the body from the distal end. Buried in

At a position near the tip of the catheter body 2,
A pair of guide balloons 4 and 4 for locally inflating a half-peripheral region of the peripheral wall of the main body 2 outward are provided integrally with the main body peripheral wall at opposing positions of the peripheral wall. Each of the guide balloons 4, 4 is connected to a respective branch tube 7, 7 at the proximal end of the catheter body 2 via a separate conduit 6, 6 arranged in parallel with the lumen 5 of the catheter body 2. It communicates with 7. Then, at the end of each of the branch tubes 7, 7, a liquid such as sterilized water or saline or a gas such as air is injected into each of the conduits 6 and 6 to inflate each of the guide balloons 4 and 4. Receiving part 8, 8 for mounting the container
There is provided a one-way valve (not shown) in the receiving portions 8,8. Therefore, the liquid or gas injected from one of the branch tubes 7 is sent to only one of the guide balloons 4 communicating with the conduit 6, and one half of the peripheral wall of the main body 2 expands. At this time, the main body 2 is bent to the front side at the non-expansion side portion which opposes due to the force of pushing and stretching the main body 2 in the longitudinal direction on the inflated half-peripheral single-sided area (see FIG. 3). The degree of bending can be adjusted by adjusting the amount of liquid or gas sent to the guide balloon 4. By extracting liquid or gas from the inflating guide balloon 4, the main body 2 is restored to its original straight state. In addition, the non-inflation side guide balloon 4 which is disposed opposite to the non-inflation side guide balloon 4
In addition, if an amount of liquid or gas corresponding to the inflating guide balloon 4 is injected, an equal force acts on the opposing surfaces of the peripheral wall to cancel each other, so that the main body 2 remains in the original straight state. become. By simultaneously inflating the opposing guide balloons 4 and 4 on both sides in this way, the balloons can be used as a peristaltic balloon used when advancing in the intestine by intestinal peristalsis.

Reference numeral 9 denotes a well-known peristaltic balloon provided between the weight 3 and a pair of guide balloons 4 and 4. Reference numeral 10 designates a hole in the lumen 5 along the longitudinal direction of the catheter body 2. A conduit for the peristaltic balloon 9 provided in parallel, and 11 is a branch tube communicating with the conduit 10, and a one-way valve (not shown) is provided at an end receiving portion 12 for mounting an injector. Is provided.

When the catheter of the first embodiment is to be placed at a predetermined position in an organ using the catheter of the first embodiment, the catheter is first inserted into the stomach through the nose, the contents of the stomach are aspirated, and then the guide wire is inserted. Insert the catheter to the distal end of the lumen and advance the catheter. When the tip of the catheter reaches the vicinity of the great curvature 20 of the stomach, the main body 2 on the side facing the fundus 21.
The balloon 4 is inflated by injecting distilled water or air from a receiving portion 8 of the branch tube 7 corresponding to the balloon so as to inflate only one of the guide balloons 4 located on the half circumference side of the balloon. As a result, the stomach body 2 at the center of the stomach at the peripheral wall on the opposite side of the inflation balloon 4
The body 2 is bent so that the head is lowered to the side 2 (FIG. 4
), The tip of the catheter changes its direction to the side of the stomach body 22, advances toward the stomach vestibule 23 along the great curvature 20, and can pass through the pylorus 24. In the first embodiment, since the guide balloons 4 and 4 are provided on both sides of the peripheral wall of the catheter body 2, the fundus at that time is independent of the orientation of the peripheral wall of the catheter inserted into the stomach. What is necessary is just to inflate the guide balloon 4 on the side facing the part 21, and it is not necessary to consider the direction of the peripheral wall when inserting the catheter. When it is difficult to bend the main body 2 with the guide wire inserted to the distal end of the lumen, the guide wire may be slightly pulled out so as to be easily bent.

The pair of opposing guide balloons 4,
4 may be arranged so that areas that do not exceed half the circumference of the peripheral wall of the main body 2 swell (see FIG. 5A).
The guide balloon 4 on one side is inflated in a region exceeding a half circumference of the main body peripheral wall, and the guide balloon 4 on the other side is inflated in a region not exceeding a half circumference of the main body peripheral wall. (See (b) of FIG. 5).

FIG. 6 shows a second embodiment in which the pair of guide balloons 4 and 4 are shifted back and forth in a state of being parallelly moved in a direction along the longitudinal direction of the catheter body 2. In each case.

FIG. 7 shows a third embodiment, in which the guide balloon 4 is provided only in one half area of the peripheral wall of the catheter body 2. When the catheter according to the third embodiment is used, it is necessary to insert the catheter and the guide wire into the stomach, for example, while operating the catheter and the guide wire such that the one side having the guide balloon is located on the back side in the bending direction. There is. In this manner, the catheter body 2 can be guided in the correct direction by bending the tip of the catheter in a desired direction. It should be noted that also in the case of the third embodiment, the guide balloon 4 provided only in one side area is provided.
May be arranged so that a region that does not exceed half a circumference swells with respect to the peripheral wall of the main body 2 (see FIG. 8A). They may be arranged so as to expand (see (b) in FIG. 8).

FIG. 9A shows another embodiment in which a similar pair of guide balloons is juxtaposed at a position near the pair of guide balloons in the first embodiment. (B) is another embodiment in which another similar guide balloon is juxtaposed at a position near the guide balloon on one side in the third embodiment. With this configuration, as shown in FIG. 10, since it is possible to bend at two points in the bending direction, the bending state can be largely increased as a whole, and the intubation can be guided to a sharply bent place. It can be conveniently used. Needless to say, the number of guide balloons for bending in the same direction is not limited to two.

As shown in the first embodiment, if a pair of guide balloons 4 and 4 are arranged to face each other, not only for guiding but also as a peristaltic balloon for advancing the catheter using intestinal peristalsis. Since it can be used, the conventional peristaltic balloon may be omitted as shown in FIG.

[0017]

According to the present invention, by inflating the guide balloon on one side, the peripheral wall portion on the opposite side can be bent to change the direction of the catheter tip, so that the intubation direction of the catheter can be changed in a desired direction. It is possible to guide them to proceed.

According to the second aspect of the present invention, since the guide balloons are provided on both sides of the peripheral wall, one of the guide balloons can be selected and inflated without considering the direction of the peripheral wall of the catheter. By doing so, there is a convenience that the direction of the catheter tip can be changed in a desired direction.

Further, according to the third aspect of the present invention, a pair of guide balloons provided opposite to the front and rear surfaces are provided.
When inflated at the same time as it enters the intestine, it also acts as a peristaltic balloon, which is convenient for advancing the catheter to a predetermined position by intestinal peristalsis.

In addition, according to the fifth aspect of the present invention, it is possible to bend at two or more locations in the vicinity of the tip of the catheter, so that the catheter can be easily pushed in, for example, sufficiently in response to a deep curve. be able to.

[Brief description of the drawings]

FIGS. 1A and 1B show a medical catheter according to a first embodiment of the present invention;
(A) is a front view of a partially broken portion of the tip portion,
(B) is a front view of the base end portion.

FIG. 2 is a front view corresponding to FIG.

FIG. 3 is an operation explanatory view.

FIG. 4 is a schematic explanatory view showing a use state.

FIGS. 5A and 5B are front views showing modified examples of the first embodiment.

FIG. 6 is a front view showing a second embodiment.

FIG. 7 is a front view showing a third embodiment.

FIGS. 8A and 8B are front views showing a modification of the third embodiment.

FIGS. 9A and 9B are front views showing examples of the first and third embodiments. FIG.

FIG. 10 is an explanatory diagram of the operation.

FIG. 11 is a front view showing another example of the first embodiment.

[Explanation of symbols]

 2 catheter main body 4 guide balloon 6 conduit

Claims (5)

[Claims] A guide balloon (4) for locally inflating a single-sided area of a peripheral wall of a main body (2) is provided near the tip of the catheter main body (2) in the main body (2). A medical catheter characterized in that it is arranged so as to be capable of inflation and contraction by being independently communicated with the provided conduit (6). 2. A pair of locally expanding outer surfaces of both sides of a region on one side and a region on the other side of the peripheral wall of the main body (2) at a position near the tip of the catheter main body (2). That the guide balloons (4, 4) are individually communicated with the respective conduits (6, 6) provided in the main body (2) so that they can be separately inflated and deflated. Characteristic medical catheter. 3. The pair of guide balloons (4, 4).
The medical catheter according to claim 2, characterized in that the (1) is disposed to face the front and rear position of the peripheral wall of the catheter body (2). 4. A pair of guide balloons (4, 4).
Are arranged so as to be shifted back and forth along the longitudinal direction of the catheter body (2).
The medical catheter according to any one of the preceding claims. 5. The guide balloon (4) described above,
4. The medical catheter according to claim 1, wherein a plurality of the catheters are arranged in parallel along the longitudinal direction of the catheter body.