| 摘要 |
<p>Hyperplasia in re-canalized blood vessels is inhibited by delivering a radioactive substance intramurally to a target site within the blood vessel. Usually, the radioactive substance is delivered using a catheter (110) having infusion ports (128) at its distal end (120). Optionally, the distal end (120) of the catheter (110) is radially expanded to engage the fusion ports (128) directly against the blood vessel wall. Further optionally, the infusion ports (128) can be modified or distributed in the manner which increases the delivery of a radioactive substance near each end of the treatment region.</p> |
