| 摘要 |
A pusher assembly for a delivery system for a sell-expanding stent (6) which is delivered by proximal withdrawal of a sheath (4) radially surrounding the stent has a stent pusher element (8) which defines a lumen for a guidewire (2), a pusher strand (16) that extends to the proximal end of the delivery system and bears an end-wise compressive stress during release of the stent. A transfer shaft (12) links the distal end of the pusher strand (16) to the pusher element (8) and lies side-by-side with the guidewire (2). In a rapid exchange version, an adapter (20) provides two lumens side-by-side, one (22) carrying the pusher strand (16) and the other (14) defining a proximal guidewire part. To the adapter is mounted the proximal end of the stent sheath (4). The system allows modular (14) construction, a tapered tip (4A) on the sheath, and an uncluttered internal configuration which facilitates passage of pulses (F) of liquids from the proximal to the distal end of the system.
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