Balloon catheter shaft having high strength and flexibility
First Claim
Patent Images
1. An elongated shaft for a catheter, comprising a tubular member consisting essentially of biaxially oriented nonporous thermoplastic polymer having a Shore durometer hardness of less than about 75 D and greater than or equal to 63 D.
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Abstract
Balloon catheter comprises an elongated shaft having a proximal end and a distal end, the elongated shaft including a biaxially oriented nonporous thermoplastic polymer tubular member having a Shore durometer hardness of less than about 75D with an inflation lumen defined 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.
291 Citations
25 Claims
- 1. An elongated shaft for a catheter, comprising a tubular member consisting essentially of biaxially oriented nonporous thermoplastic polymer having a Shore durometer hardness of less than about 75 D and greater than or equal to 63 D.
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11. An elongated shaft for a catheter prepared by a process comprising:
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melt-extruding thermoplastic polymeric material having a Shore durometer hardness of less than about 75 D and greater than or equal to 63 D at an elevated temperature into an extruded tube having a first outer diameter, a first inner diameter, and a tube lumen defined therein, and cooling the extruded tube to a temperature less than the elevated temperature of the melt-extrusion; 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 cooling the biaxially-oriented expanded tube to room temperature to form a tubular member. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification