| 摘要 |
<p>A catheter (10) for treating stenotic sites in the human body (e.g. in the azygos vein) includes an expandable portion (12) having, when expanded, an arched shape. The arched shape may extends over an angle (α) of at least 90° degrees, and preferably of between 90° and 120° degrees, with a radius (R) of less than 3 centimetres, and preferably between 2 and 3 centimetres. The expandable portion (12) may include a flexible support member, and expandable members coupled to the support member to impart, when expanded, the desired arched shape to the flexible support member. Alternatively, the expandable portion (12) may includes an actuator member acting longitudinally of and sidewise to the expandable portion to impart thereto the desired arched shape.</p> |
