| 摘要 |
<p>A prosthesis (100) is compressed in a device (10) by being wrapped in a flexible sheet (60) inside a cartridge (12), the opposite edges of the sheet being led out through a longitudinal slit (40) in the cartridge and attached respectively to the outer surface of cartridge (12) and the inner surface of a surrounding shell (50); subsequent relative rotation of the shell (50) pulls the sheet (60) outwardly of the cartridge causing compression of the prosthesis. Stop projections (72,73) are provided to limit the rotation to less than one complete revolution. End pieces (14,16) of the device have tubes (22,32) aligned with the prosthesis when compressed and a pusher rod (90), Fig 4 , is pushed through the tubes to push the prosthesis into an introducer sheath (36). The or each end piece (14,16) may incorporate a ratchet mechanism (120) to prevent rotation in the wrong direction.</p> |
