Balloon catheter shaft having high strength and flexibility
First Claim
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1. A balloon catheter, comprising:
- an elongated shaft having a proximal end, a distal end, an inflation lumen extending therein, and a single layer biaxially oriented nonporous thermoplastic polymer tubular member having a Shore durometer hardness of less than about 75D and having the inflation lumen therein; and
a balloon sealingly secured proximate the distal end of the shaft and having an interior in fluid communication with the inflation lumen.
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Abstract
Balloon catheter comprises an elongated shaft having a proximal end, a distal end, an inflation lumen extending therein, and a biaxially oriented nonporous thermoplastic polymer tubular member having a Shore durometer hardness of less than about 75D and having the inflation lumen therein. The balloon catheter also comprises a balloon sealing secured proximate the distal end of the shaft and having an interior in fluid communication with the inflation lumen.
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Citations
31 Claims
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1. A balloon catheter, comprising:
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an elongated shaft having a proximal end, a distal end, an inflation lumen extending therein, and a single layer biaxially oriented nonporous thermoplastic polymer tubular member having a Shore durometer hardness of less than about 75D and having the inflation lumen therein; and a balloon sealingly secured proximate the distal end of the shaft and having an interior in fluid communication with the inflation lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A balloon catheter having an elongated shaft and a balloon prepared by a process comprising:
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a) melt-extruding a thermoplastic polymeric material having a Shore durometer hardness of less than about 75D to form a tube having a lumen, a first inner diameter and a first outer diameter, and cooling the extruded tube to a temperature less than an elevated temperature of the melt-extrusion; b) placing the extruded tube within a capture member and biaxially orienting the polymeric material of the extruded tube by radially expanding the extruded tube with pressurized media in the tube lumen and axially expanding the extruded tube with a load applied on at least one end of the tube; and c) cooling the expanded tube to room temperature, the cooled, expanded tube being a single layer biaxially oriented nonporous thermoplastic polymer tubular member; and d) sealingly securing a balloon proximate to a distal end of the tubular member, such that the tubular member forms at least a portion of the elongated shaft, the elongated shaft having a proximal end and a distal end, and the balloon has an interior in fluid communication with the tubular member lumen. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification