| 摘要 |
A balloon dilatation catheter including a catheter shaft having a proximal end and a distal end with an inflatable balloon secured thereto. The balloon has a cylindrical section having a first end, a first tapered section of the balloon gradually tapering from a first end adjacent the first end of the cylindrical section to a second end, and a second tapered section adjacent the first tapered section. The second tapered section tapers from a primary end adjacent the second end of the first tapered section to a secondary end. The first tapered section has a first taper angle with respect to the catheter shaft and the second tapered section has a second taper angle with respect to the catheter shaft, the first taper angle being smaller than the second taper angle.
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