| 摘要 |
This invention is an overlay dual balloon catheter (10). Two balloons (14, 22) composed of differing materials are employed, the balloons being disposed so as to overlap one another but not being bonded to one another, so that adjacent surfaces of the two balloons are permitted to move relative to one another, to provide improved surface and structural characteristics in a balloon unit. Preferably, an outer balloon (22), disposed on the exterior of the catheter is composed of latex, silicone, or a thermoplastic elastomer while an inner balloon (14), disposed underneath the first balloon is composed of a material employed in existing angioplasty balloons such as polyester or polyurethane. The overlay dual balloon catheter (10) may be used in angioplasty, embolectomy and thrombectomy.
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