| 摘要 |
<p>A multiple lumen catheter device (10) for use in removing friable material from a vein graft or other treatment site as a preliminary step to conventional atherectomy. The device has a pair of spaced apart balloons (24, 26) attached near the distal end (16) and includes lumina (18, 20) for control of balloon expansion. The region between the balloons (24, 26) defines a treatment chamber (34) from which loosened material does not escape into the blood stream. Access to the treatment chamber (34) is through an aspiration and access lumen (20) having an inside diameter large enough to permit insertion of a variety of catheter devices for removal of burden or examination of the site. Infusion of a flushing fluid or medication is provided through the inserted catheter device or through a separate lumen. Aspiration of loosened material and excess fluid takes place through the aspiration and treatment chamber access lumen (20). One embodiment includes perfusion (36, 38) around the treatment chamber (34) to prevent ischemia.</p> |
