EP0274129A2 — Reinforced balloon dilatation catheter with slitt…

Claim 1

Independent Claim 160 words

In a balloon dilatation catheter adapted to be utilized in connection with a guiding catheter and a guide wire, a flexible elongate tubular member having proximal and distal extremities and having a lumen extending therethrough, an inflatable balloon, means mounting the inflatable balloon on the distal extremity of the tubular member forming liquid-tight seals with the tubular member, the interior of the inflatable balloon being in communication with the lumen and sleeve-like means extending through the balloon and extending rearwardly from the balloon and alongside the lumen, said sleeve-like means having a guidewire lumen extending therethrough, said sleeve-like means being adapted to receive a guide wire extending therethrough and extending rearwardly of the flexible elongate element into a region adjacent the proximal extremity of the proximal elongate element, said sleeve-like means having a slit extending longitudinally of the same from the proximal extremity of the sleeve to a region adjacent the balloon permitting the guide wire to be removed therethrough.

Claim 2

Dependent Claim 160 words

In a balloon dilatation catheter adapted to be utilized in connection with a guiding catheter and a guide wire, a flexible elongate tubular member having proximal and distal extremities and having a lumen extending therethrough, an inflatable balloon, means mounting the inflatable balloon on the distal extremity of the tubular member forming liquid-tight seals with the tubular member, the interior of the inflatable balloon being in communication with the lumen and sleeve-like means extending through the balloon and extending rearwardly from the balloon and alongside the lumen, said sleeve-like means having a guidewire lumen extending therethrough, said sleeve-like means being adapted to receive a guide wire extending therethrough and extending rearwardly of the flexible elongate element into a region adjacent the proximal extremity of the proximal elongate element, said sleeve-like means having a slit extending longitudinally of the same from the proximal extremity of the sleeve to a region adjacent the balloon permitting the guide wire to be removed therethrough.

Claim 3

Dependent Claim 24 words

A catheter as claimed in Claim 1 wherein said sleeve-like means is in the form of an additional lumen provided in the tubular member.

Claim 4

Dependent Claim 37 words

A catheter as claimed in Claim 1 or 2 wherein said tubular member has a portion thereof formed of a higher density material than other portions of the member to provide different stiffnesses for the tubular member.

Claim 5

Dependent Claim 41 words

A catheter as claimed in Claims 1, 2 or 3 together with stiffening means disposed in the proximal extremity of the tubular member in the portion thereof along which the guide wire is adapted to extend exteriorally of the tubular member.

Claim 6

Dependent Claim 24 words

A catheter as claimed in Claim 4 wherein said stiffening means is in the form of an additional member formed within the tubular member.

Claim 7

Dependent Claim 26 words

A catheter as claimed in Claim 5 wherein said stiffening means is in the form of a mandrel, at least a portion of which is tapered.

Claim 8

Dependent Claim 23 words

A catheter as claimed in Claims 1, 2, 3, 4, 5 or 6 together with visual marking means carried by the tubular member.

Claim 9

Dependent Claim 13 words

A catheter as claimed in Claim 6 wherein said marking means is colored.

Claim 10

Dependent Claim 126 words

In a balloon dilatation catheter for use with a guiding catheter inserted into a vessel of a patient, a flexible elongate tubular member having proximal and distal extremities and having first and second lumens extending therethrough, a balloon carried by the distal extremity of the tubular member and having its interior in communication with the second lumen, the tubular member being provided with a notch which extends from the exterior of the tubular member into a first lumen, the notch being positioned proximally of the balloon and a guide wire extending through the notch and into the first lumen and through the distal extremity of the tubular member and extending proximally from the notch alongside the tubular member beyond the proximal extremity of the tubular member.

Claim 11

Dependent Claim 126 words

In a balloon dilatation catheter for use with a guiding catheter inserted into a vessel of a patient, a flexible elongate tubular member having proximal and distal extremities and having first and second lumens extending therethrough, a balloon carried by the distal extremity of the tubular member and having its interior in communication with the second lumen, the tubular member being provided with a notch which extends from the exterior of the tubular member into a first lumen, the notch being positioned proximally of the balloon and a guide wire extending through the notch and into the first lumen and through the distal extremity of the tubular member and extending proximally from the notch alongside the tubular member beyond the proximal extremity of the tubular member.

Claim 12

Dependent Claim 52 words

A catheter as claimed in Claim 9 together with plug means disposed in the first lumen proximal of the notch and serving as a ramp to urge the guide wire out of the notch when the guide wire is threaded into the first lumen from the distal extremity of the tubular member.

Claim 13

Dependent Claim 32 words

A catheter as claimed in Claims 9 or 10 together with stiffener means disposed in the first lumen from the proximal extremity of the tubular member into a region adjacent the notch.

Claim 14

Dependent Claim 34 words

A catheter as claimed in Claims 9, 10 or 11 wherein the tubular member is provided with a slit extending longitudinally of the tubular member from the notch into a region adjacent the balloon.

Claim 15

Dependent Claim 57 words

A catheter as claimed in Claims 9, 10, 11 or 12 wherein the tubular member is formed of a plastic of high and low densities and wherein portions of the tubular member have different proportions of high density and low density plastics so as to provide varying degrees of stiffness along the length of the tubular member.

Claim 16

Dependent Claim 22 words

A catheter as claimed in Claim 13 wherein the proximal extremity of the tubular member is formed of 100% high density plastic.

Claim 17

Dependent Claim 28 words

A catheter as claimed in Claim 14 wherein an intermediate portion of the tubular member is formed of a mixture of high density plastic and low density plastic.

Claim 18

Dependent Claim 27 words

A catheter as claimed in Claims 11, 12, 13, 14 or 15 wherein said stiffener is in the form of a mandrel disposed in the first lumen.

Claim 19

Dependent Claim 24 words

A catheter as claimed in Claim 16 wherein the distal extremity of the mandrel is tapered to vary the stiffness provided by the mandrel.

Claim 20

Dependent Claim 15 words

A catheter as claimed in Claim 17 wherein the mandrel is formed of a metal.

Claim 21

Dependent Claim 21 words

A catheter as claimed in any one of Claims 9-18 together with colored visual marker means carried by the tubular member.

Reinforced balloon dilatation catheter with slitted exchange sleeve and method

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