| 摘要 |
A balloon on a balloon catheter has two different rates of distensibility. It can be used to perform angioplasty by taking advantage of its high strength and relatively low distensibility up to a predetermined range of inflation pressures and still be used to set a stent by operating within a pressure range where there is a higher distensibility. The balloon can be a single material that is biaxially oriented less than fully, or a blend of materials similarly oriented. Strands of a more crystalline material may run longitudinally through a matrix of a less crystalline material, with the resulting balloon, when not fully biaxially oriented, exhibiting high burst strength and two different rates of distension at different applied inflation pressures.
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