| 摘要 |
<p num="1"><br/><br/><br/>A highly flexible delivery device (2) for a stent graft (6) particularly for <br/>deployment into the thoracic arch of a patient. The delivery device has a <br/>distal handle (7), a pusher catheter (4) extending proximally from the handle <br/>to a proximal nose cone dilator (11), a guide wire catheter (3) extending from <br/>the proximal nose cone dilator to the pusher catheter. To give flexibility the <br/>guide wire catheter comprises a Nitinol~tube, the nose cone dilator has a high <br/>flexibility and the pusher catheter has a graded flexibility being more <br/>flexible at its proximal end than at its distal end. The graded flexibility <br/>can be provided by joined segments (4a, 4b and 4c) of different flexibility or <br/>by a inner metal tube (72) to give rigidity over some of the length. <br/>Alternatively the graded flexibility can be provided by tapering the wall <br/>thickness (80, 80a) of the pusher catheter.<br/>
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