| 摘要 |
The device comprises: a first catheter (2) provided with dilators, a first inflatable balloon (3), associated to the first catheter (2) and active between an inflated configuration, in which the first inflatable balloon (3) is filled with a pressurised fluid and extends in a radial direction away fr om the first catheter (2), and a deflated configuration; means (4) for sending the fluid to the first inflatable balloon (3); an external tube (5), axially slidable on the first catheter (2), for covering and uncovering the first inflatable balloon (3) in the deflated configuration thereof; a second catheter (6), which can be inserted internally of the first catheter (2) and having an internal passage for a metal guide wire; a second inflatable ballo on (7), associated to the second catheter (6) and active between an inflated configuration, in which the second inflatable balloon (7) is filled with a pressurised fluid and extends in a radial direction away from the second catheter (6), and a deflated configuration; means (8) for sending the fluid to the second inflatable balloon (7). Radio-opaque markers (35) are exhibited o n the second catheter (6), close to the second inflatable balloon (7); a later al hole or holes (28) for purposes of angiography are afforded, the hole being supplied by the guide conduit or by a special conduit therefor.
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