Trocar cannula and catheter

Details Trocar cannula and catheter Trocar cannula and catheter

1992-09-29

1994-04-05

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604256, 604 31, 1374875, A61M 2500, A61M 514, A61M 100

Patent

active

053000471

ABSTRACT:
A TROCAR catheter assembly employs a regulated gas flow between a catheter and the inner wall of a cannula sleeve in which the catheter moves. Annular grooves are formed in the wall of the sleeve and the grooves are connected to a source of gas which produces a pressure differential which causes gas to flow in a manner to control passage of gas to or from a body cavity in which the sleeve is inserted. In one embodiment, one of the annular grooves is connected to a bladder which is inflated to seal the entire opening defined by the inner wall of the sleeve when the catheter is absent.

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