Catheter with a polyimide distal tip
First Claim
Patent Images
1. A balloon catheter, comprising:
- a) an elongated shaft having a first lumen, a second lumen, a proximal shaft section, and a distal shaft section which has the second lumen extending therein;
b) a balloon on the distal shaft section, having proximal end, a distal end, and an inflatable interior in fluid communication with the first lumen of the shaft, with at least a portion of the distal shaft section extending within the inflatable interior of the balloon; and
c) a multilayered distal tip member secured at a distal end of the catheter to define a third lumen in fluid communication with the second lumen of the shaft, and having a proximal end located distal to the inflatable interior of the balloon, a first layer formed of a polyimide first material and a second layer formed of a polymeric second material which is different than the polyimide first material.
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Abstract
A catheter having an elongated shaft which has a multilayered distal tip with a first layer formed of a polyimide first material and a second layer formed of a polymeric second material. In one embodiment the multilayered distal tip is a separate member, distal to the distal end of a proximal portion of the shaft. In another embodiment, the shaft has an outer tubular member, and a multilayered inner tubular member with a distal end which forms the multilayered distal tip of the shaft. In a presently preferred embodiment, the polyimide material is a thermoset polyimide. In one embodiment, the polymeric second material is a polyamide material.
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Citations
24 Claims
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1. A balloon catheter, comprising:
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a) an elongated shaft having a first lumen, a second lumen, a proximal shaft section, and a distal shaft section which has the second lumen extending therein; b) a balloon on the distal shaft section, having proximal end, a distal end, and an inflatable interior in fluid communication with the first lumen of the shaft, with at least a portion of the distal shaft section extending within the inflatable interior of the balloon; and c) a multilayered distal tip member secured at a distal end of the catheter to define a third lumen in fluid communication with the second lumen of the shaft, and having a proximal end located distal to the inflatable interior of the balloon, a first layer formed of a polyimide first material and a second layer formed of a polymeric second material which is different than the polyimide first material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A balloon catheter, comprising:
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a) an elongated shaft with a proximal shaft section a distal shaft section, an outer tubular member having a first lumen, and an inner tubular member disposed within at least a distal portion of the outer tubular member and having a second lumen; b) a balloon on the distal shaft section, having proximal end, a distal end, and an inflatable interior in fluid communication with the first lumen of the shaft, such that a distal portion of the inner tubular member extends within the inflatable interior of the balloon; and c) a multilayered distal tip member secured at a distal end of the catheter, having a proximal end located distal to the inflatable interior of the balloon, a third lumen in fluid communication with the second lumen, a first layer formed of a thermoset polyimide first material, and a second layer formed of a polymeric second material different than the thermoset polyimide first material. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification