JPH08317991A - Baloon catheter with light guiding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of the light-emitting section of a light conductor capable of illuminating the entire circumference of the stent uniformly and appropriately, and a balloon catheter which is easy to maintain the stent axially and to determine the position thereof. SOLUTION: The catheter comprises a tube-like basic body 2 with a distal end and a proximal end, and a balloon member 4 positioned adjacent the distal end and surrounding a portion of the distal end of the tube-like basic body 2. A light conductor 12 extends from the proximal end to the distal end, with a light-emitting section 13 at a location within the balloon 4 fixed on the basic body 2 adjacent the proximal end. The conductor 12 extends in a pipeline 9 with the outer wall of its end extending out from the balloon 4 and defining the pipeline 9, and a portion of it pre-stripped. Thus the light-emitting section 13 of the light conductor 12 is exposed in the balloon 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balloon catheter comprising a tubular base body having a distal end portion and a proximal end portion, and a balloon member attached and arranged to the distal end portion by a usual method.

[0002]

2. Description of the Related Art In a balloon catheter of this type, a balloon member surrounds an end portion of a tubular base body and is held therein.

In conventional balloon catheters, a light guide device extends from the proximal end to the distal end. The light guide also includes a light emitting end located within the balloon member. The light emitting end is attached to the tubular substrate while disposed within the balloon member to secure it within the balloon member.

Further, at the proximal end of the balloon catheter, the light guide device has a light collecting end into which the light emitted from the light emitting end enters. The balloon catheter is particularly adapted to secure a stent made of a material that cures under the action of light, such as ultraviolet light, into the body of a patient. The stent is crimped around an unexpanded balloon member prior to introduction into the patient's body.

In this condition, the distal end of the balloon catheter is inserted into the patient's body with the stent, after which the balloon member and thus the stent are positioned accurately in the patient's blood vessel. It After that, when the balloon member is supplied with compressed air or compressed liquid to be expanded, the stent is expanded.

The thus introduced stent is then exposed to light emitted from the light emitting end, which cures the material from which the stent is formed and lines the blood vessel in the patient's body in the cured expanded state. It can remain as a support.

Thus, in this case, the light emitting end of the light guide device is positioned at a proper position in the balloon member, and the light-curable material is precisely, accurately and uniformly exposed. Achieving is important.

[0008]

However, recently,
In the treatment in which a balloon catheter is placed in a blood vessel of a patient, it is necessary to irradiate light uniformly and properly over the entire circumference of the stent in order to accurately control the curing state and timing of the stent. ing.
However, since the light emitting end in the balloon member must be supported by an appropriate member, that member is projected to create a shadow, and the inner peripheral surface of the stent is uniformly illuminated to achieve a sufficiently uniform curing. It was difficult to do.

In particular, the light emitting end is extremely thin,
It is difficult to maintain a fixed shape in the balloon member.
This means that it is difficult to maintain a uniform distance with respect to the entire inner peripheral surface of the stent. Therefore, it has been difficult to control the irradiation of light with a uniform intensity and light amount over the entire circumference of the stent.

The present invention solves such problems and meets the demands, and provides a structure of a light emitting end portion of a light guide device capable of uniformly and appropriately irradiating light over the entire circumference of a stent. Is an issue.

[0011]

SUMMARY OF THE INVENTION To solve the above problems, the present invention provides a tubular base body having a distal end portion and a proximal end portion, and a peripheral portion of the tubular base body disposed at the distal end portion. What is claimed is: 1. A balloon catheter comprising a balloon member encircling a portion of an end, wherein a light guide extends from a proximal end to a distal end, the light guide having a distal end. In a balloon catheter having a light guide, the light emitting end disposed in the balloon member being fixed to the tubular base near the portion, the light guide being a conduit of the tubular base. And an end outer wall of the tubular substrate extends into the balloon member and defines the conduit and is at least partially pre-removed so that the light guide The device Characterized in that are exposed to the end into the balloon member, to provide a balloon catheter.

Thus, according to a preferred embodiment of the present invention, the tubular substrate comprises an outer tubular member and an inner tubular member arranged in a conduit defined therein. The light emitting end of the light guide is fixed to the inner tubular member. Also, the light guide device extends with the inner tubular member within the conduit of the outer tubular member.

In another preferred embodiment, the light emitting end portion of the light guide device can be fixed to the balloon member with a precise and accurate positioning by adhesion. And, again, by removing at least a portion of the outer wall of the balloon catheter, a kind of "bed" is obtained,
It helps to hold the stent in place axially at the light emitting end upon its introduction. In addition, supporting the light emitting end by the end of the balloon catheter with a part of the outer wall removed in this way means that the light emitting end is erected and held, for example, in the center of the balloon member, and the balloon from the This contributes to equalizing the distance in all directions to the inner peripheral surface of the catheter or the inner peripheral surface of the stent. It should be noted that the removal of a part of the outer wall of the balloon catheter can be achieved by forming the small holes substantially all around the outer wall.

In any case, in order to uniformly expose the entire circumference of the balloon member, the light emitted from the light emitting end of the balloon member is partially reflected and partially transmitted. It is most effective to manufacture using such a method and materials. Thus, a part of the light emitted from the light emitting end of the light guide device is reflected in the balloon member. As a result, the balloon member side within the projection position of the tubular substrate is properly exposed over the entire length of the light emitting end without being shaded.

[0015]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view illustratively showing a first embodiment of a balloon catheter of the present invention, and FIG. 2 is a partial cutaway of a distal end portion of a balloon catheter of another embodiment of the present invention. 3 is a perspective view, and FIG. 3 is a cross-sectional view taken along the line 3-3 in FIG. 2.

In FIG. 1, a balloon catheter 1 according to a first embodiment of the present invention is indicated generally by the reference numeral 1. Therefore,
This balloon catheter 1 comprises a tubular substrate 2 having a proximal end and a distal end.

The proximal end thereof is a portion which should be left outside the patient's body during treatment, in which the tubular substrate 2 is placed.
The joint member 3 adapted to the conduit in the inside is provided. At the opposite end thereof, that is, at the distal end of the tubular base body 2, a balloon member 4 is held, and the balloon member 4 bends around one end portion of the tubular base body 2.

As can be seen from FIG. 1, the tubular substrate 2
Is constituted by an outer tubular member 5 and an inner tubular member 6 arranged along a pipe line 9 therein. A tubular line 7 is also defined in the tubular member 6 on the inner side thereof so that the guide wire can be extended as usual.

The inner tubular member 6 is connected to the catheter end portion 8 at its tip, and a guide wire channel 7 is formed in communication with the inside thereof. The balloon member 4 is attached at its distal end to the end of the catheter end 8 and is connected at its proximal end to the end of the outer tubular member 5.

A single light guide 12 is provided on the inner tubular member 6
Together with the outer tubular member 5 extends into the conduit 9.
The light guide device 12 extends from the proximal end portion to the distal end portion, and the tubular substrate 2 is formed with a portion 15 of the balloon member 4 which is in an uncovered state. Thus, although the light guide device 12 is very thin, the light guide device 12 is installed and held in the center of the balloon member 4 by the tubular base body 2.

The proximal end portion of the light guide device 12 is a light collecting end portion 13.
Through which light is emitted or emitted into the light guide 12 by a light source 14 as shown. This light is transmitted to the light emitting end 15 inside the light guide device 12. This light-emitting end 15 is preferably finished in such a way that, for example, by filing, the transmitted light is radially emitted or illuminated over the entire length of the light-emitting end 15. The light emitting end portion 15 is joined to the tubular base body 2, in particular, the tubular member 6 inside thereof by an adhesive joint portion 16.

The balloon member 4 is preferably formed so that a part of the light emitted by the light emitting end 15 is reflected and a part of the light is transmitted. As a result of the reflection of some of the emitted light, the inside of the balloon member 4 is evenly exposed, and also the part within the direct projection of the tubular substrate, ie the bottom of FIG. Uniform exposure over the front circumference of the balloon member 4 is necessary for uniform exposure of the stent to be cured and uniform curing.

The balloon member 4 is inflated by supplying pressurized liquid or compressed air therein. To do this,
The remaining part of the cross section of the line 9 is used, which is connected to the connection 10 of the joint member 3.

The connecting portion 11 includes the guide wire channel 7
Connected to The connecting portion 11 has a seal portion so that the guide wire can be inserted in a sealed state and moved forward and backward.

In FIG. 2, as a second embodiment 20 different from the above, only the distal end portion is shown. The balloon catheter 20, as can be clearly seen in FIG.
It is composed of a tubular substrate 22, and this tubular substrate 22 is
In addition, two pipe lines 23 and 24 are defined. Pipeline 23
Extends to the extreme distal end to receive a guidewire.

The light guide device 25 extends in the conduit 24. As can be understood from FIG. 2, the balloon member 22
A tubular substrate 21 extending into and defining a conduit 24
The outer wall at the end of the is partially cut away so that a so-called "bed" 26 is formed so that the light emitting end 27 of the light guide device 25 is fixed. This "bed" 26 serves to hold the stent axially as it is introduced into the patient's body and axially position it properly within the patient's body.

An adhesive 28 may also be used in this case to secure the light guide 25 to the "bed" 26. Further, the light emitting end portion 27 is finished to have a rough surface so that light can be emitted radially and uniformly exposed over the entire length.

A light conducting monofilament or a bundle of optical fibers can be applied to the light guide device. Also,
Both can be combined. Light emitting end 27
May, for example, consist of a single piece, which may be connected to a light conducting means having a bundle of optical fibers extending from the proximal end.

[0029]

According to the present invention, the light emitted in the balloon member is uniformly and appropriately irradiated to the entire circumference of the member to be cured such as the stent. In the treatment performed by placing the stent in the blood vessel of the patient, the curing state and timing can be accurately controlled. In addition, the stent can be accurately positioned. Therefore, accuracy can be brought about in the treatment using the stent.

[Brief description of drawings]

FIG. 1 is a perspective view illustratively showing a first embodiment of a balloon catheter of the present invention.

FIG. 2 is a partially cutaway perspective view of a distal end portion of a balloon catheter according to a second embodiment of the present invention.

3 is a cross-sectional view taken along the line 3-3 in FIG.

[Explanation of symbols]

1 --- Balloon catheter 2 --- Tubular substrate 3 --- Joint member 4--Balloon Member 5: Outer tubular member 6: Inner tubular member 7: Guide wire channel 8 ...・ ・ ・ ・ ・ ・ Catheter end 9 ・ ・ ・ ・ ・ ・ ・ ・ Outer tubular member conduit 10 ・ ・ ・ ・ ・ ・ Connecting part 11 ・ ・ ・ ・ ・ ・ Connecting Part 12 ・ ・ ・ ・ ・ ・ Light guide device 13 ・ ・ ・ ・ ・ ・ ・ ・ Lighting end 14 ・ ・ ・ ・ ・ ・ Light source 15 ・ ・ ・ ・ ・ ・ Light emitting end 16 ... Adhesive joining part 20 ..... Balloon catheter of the second embodiment 21 .... Tubular substrate 3, 24 ..... Pipeline of the balloon catheter of the second embodiment 25 ..... The light guide device of the second embodiment 26 ..... Bed 27 ..... Light emitting end portion of light guide device of second embodiment 28 ........ Adhesive portion of second embodiment

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hahn, Marcel Gerhard The Netherlands, NL-9312 Piedrewny Tap, Jay. Pee. Santa Weg 14 (72) Inventor Leone, James Ernest Miami 33156, Florida, USA 33108 South West Street 5865

Claims (5)

[Claims] 1. A balloon catheter comprising a tubular base body having a distal end portion and a proximal end portion, and a balloon member disposed at the distal end portion and surrounding and surrounding a portion of the tubular base body having the distal end portion. , In which a light guide extends from the proximal end to the distal end, the light guide having a light emitting end disposed within the balloon member near the distal end of the tubular device. It is provided in a state of being fixed to the base body,
In a balloon catheter having a light guide device, the light guide device extends into a duct of the tubular base body, and an outer end wall of the tubular base body extends into the balloon member and extends through the duct line. A balloon catheter, wherein the balloon catheter is defined and at least partially pre-exposed to expose the light emitting end of the light guide device within a balloon member. 2. The balloon catheter according to claim 1, wherein the tubular substrate comprises an outer tubular member and an inner tubular member disposed in a conduit defined therein. A balloon catheter, wherein the light emitting end of the device is secured to the inner tubular member. 3. The balloon catheter according to claim 2, wherein the light guide device extends with the inner tubular member within the conduit of the outer tubular member. 4. The balloon catheter according to claim 1, wherein the light guide device is fixed by adhesion. 5. The balloon catheter according to claim 1, wherein the light emitted from the light emitting end of the balloon catheter is partly reflected and partly transmitted. A balloon catheter manufactured by a method that is transmitted.