| 摘要 |
<p>The expander consists of an inflatable component (3) and a trocar which has a valve (4) at its head end for introducing a fluid, and an inner seal system. The inflatable component is located, when in its uninflated state, inside the trocar and fixed to its intracorporal end, while the trocar serves to deliver the fluid to the inflatable component. The trocar comprises a hollow cylindrical head (1) with the valve (4), attached to the end of a cylindrical tubular body (2) with a central passage containing a fluid feed duct The inflatable component is in the form of a pre-shaped pouch of a supple and preferably non-elastic material, such as aluminium foil coated with an insulating material, and designed so that it becomes rigid when inflated. It has a rough outer surface.</p> |
