| 摘要 |
A stent deployment device (110) is provided for deploying a stent in a lumen of a patient. The device can include a catheter (112), a first balloon (122) positioned near a distal end of the catheter and a second balloon (123) adjacent to the first balloon. Alternatively, the second balloon can be positioned over the first balloon. The device also includes an expandable stent (210) positioned over the first balloon and the second balloon. The first balloon comprises a semi-compliant material, a noncompliant material or a compliant material. Similarly, the second balloon comprises a semi-compliant material, a noncompliant material or a compliant material. The first balloon is expandable to a first diameter, while the second balloon can be expandable to a second diameter. |
| 主权项 |
1. A stent deployment device for deploying a branch vessel stent in a branch vessel branching from a main vessel, comprising:
a catheter, a first balloon, a second balloon positioned near a distal end of the catheter and expandable to a first diameter, the first balloon disposed proximal to and extending coaxially only partially over a proximal end of the second balloon, the first balloon being expandable to a second diameter that is larger than the first diameter, and an expandable stent positioned over the first balloon and over the second balloon, the expandable stent having a flareable end portion configured to reside in the main vessel and a tubular portion configured to reside in the branch vessel and coupled to the flareable end portion, the flareable end portion overlying the first balloon, the tubular portion overlying at least the second balloon, where expansion of the first balloon expands the flareable end portion of the stent to at least the second diameter, and expansion of the second balloon expands the tubular portion of the stent to the first diameter, wherein the first balloon comprises a more compliant material than the second balloon. |
