| 摘要 |
<p>An expander device (10) comprises a flexible wall (12, 14) defining a fluid impervious chamber (16) with an injection port (26). An expandable cover (12) has a limited expansion portion (34) and a differential expansion portion (32) whereby after implanting the device (10) beneath a tissue flap (36) saline fluid may be injected through the port (26) to inflate the device (10) to a first condition at which the limited expansion portion is taut and thereafter further saline fluid may be injected further to expand the differential expansion portion (32) and effect differential expansion of the flap (36) portion over the differential portion (32), whereby the flap (36) may be severed and flattened to cover a larger area than that from which it was separated.</p> |
