Robust catheter tubing
First Claim
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1. An elongate, flexible catheter, comprising:
- a shaft having a proximal end, a distal end, and a lumen extending therein, the shaft having an inner layer comprising an amorphous polyamide having a Shore D durometer value of greater than 78, and an outer layer comprising a semi-crystalline polyamide or copolyamide having a Shore D durometer value of less than 76, wherein the outer layer is thinner than the inner layer, the shaft having an increased resistance to kinking as compared to a similar shaft of a single layer of the amorphous polyamide having a Shore D durometer value of greater than 78.
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Abstract
Elongate, flexible catheter includes a shaft having a proximal end, a distal end, and a lumen extending therein. The shaft has an inner layer comprising an amorphous polyamide having a Shore D durometer value of greater than 78, and an outer layer comprising a semi-crystalline polyamide or copolyamide having a Shore D durometer value of less than 76. The outer layer is thinner than the inner layer. The shaft has an increased resistance to kinking as compared to a similar shaft of a single layer of the amorphous polyamide having a Shore D durometer value of greater than 78.
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Citations
33 Claims
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1. An elongate, flexible catheter, comprising:
a shaft having a proximal end, a distal end, and a lumen extending therein, the shaft having an inner layer comprising an amorphous polyamide having a Shore D durometer value of greater than 78, and an outer layer comprising a semi-crystalline polyamide or copolyamide having a Shore D durometer value of less than 76, wherein the outer layer is thinner than the inner layer, the shaft having an increased resistance to kinking as compared to a similar shaft of a single layer of the amorphous polyamide having a Shore D durometer value of greater than 78. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An elongate, flexible catheter, comprising:
a shaft having a proximal end, a distal end, and a lumen extending therein, the shaft having an inner layer comprising high density polyethylene and an outer layer comprising a blend of two polymers, including a first polymer being an amorphous nylon having a Shore D durometer value of greater than 78 and a second polymer having a Shore D durometer value of no more than 76, wherein the inner layer is thicker than the outer layer, the shaft having an increased resistance to kinking as compared to a similar shaft having an inner layer of the high density polyethylene and an outer layer of the amorphous nylon having a Shore D durometer value of greater than 78. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
Specification