| 摘要 |
The present invention relates to a catheter system useful in treating lower extremity arterial chronic total occlusion (CTO). More particularly, the catheter system includes a first catheter having a first lumen extending therethrough, and a second catheter having a second lumen extending therethrough. The second catheter includes an engaging mechanism, such as an inflatable balloon, for engaging at least a portion of the first catheter such that a guide wire can be fed from the first lumen of the first catheter to the second lumen of the second catheter. In use, the first catheter is advanced to a treatment site through a vascular body from a downstream side of the treatment site. The second catheter is also advanced to the treatment site through the vascular body from an upstream side of the treatment site. The second catheter is engaged with the first catheter within the vascular body. The guide wire is then fed from the first catheter into the second catheter. Thereafter, the first and second catheters are removed from the vascular body, thereby leaving the guide wire extending through the treatment site. The guide wire is used to advance a treatment balloon to the treatment site for treating a CTO condition existing therein.
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