| 摘要 |
<p>A surgical implement comprising an irrigator/evacuator includes a reservoir (14) connected to one side of the barrel (10) of a pump having an outlet opening (11) at one end. Fluid can be displaced outwardly and withdrawn into the implement by means of a compression bulb (12) or other suitable device. A free piston (15) is housed in the barrel (10) so as to be movable in either direction by fluid flow. The piston is retracted by inflowing liquid and thereby allows free passage of pieces of tissue or other material from the opening (11) towards the reservoir (14). Outward displacement of the fluid causes the piston (15) to move towards the outlet end of the barrel (10), in which position it effectively prevents such pieces of tissue from being returned through the opening (11) without significantly restricting fluid flow. </p> |
