| 摘要 |
A tip design for a multilumen catheter (1) which includes a plurality of inflatable tubes (6) each of which is attached to a lumen (3) at the distal end of the multilumen catheter. The inflatable tubes are normally inverted in their respective lumens, but can be individually everted, inflated, deflated, and retracted or inverted back into their lumen by the application of fluid pressure and vacuums at the proximal end of the multilumen catheter. In a procedure to open a constricted passageway one or more of the inflatable tubes can be inverted into the constriction and thereafter inflated to open the passageway. Thereafter, addition inflatable tubes can be inverted into the constriction and inflated to effect further opening of the passageway. In another embodiment, the inflatable tubes are provided with gripping surfaces (10) and are manipulated by appropriate fluid pressures like fingers to grasp and recover target objects in a blocked passageway. |
