Irrigating laparoscopic cannula

Details Irrigating laparoscopic cannula Irrigating laparoscopic cannula

1995-04-13

2000-01-25

Stright, Jr., Ronald K.

Surgery

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

Treating material introduced into or removed from body...

604151, 600157, 600158, A61M 500

Patent

active

060173335

ABSTRACT:
A trocar assembly consisting of a trocar in a central opening in a cannula. The cannula is provided with at least one separate passage running parallel to the central passage. The separate passage is connected to a source of cleansing fluid and a pump for pumping fluid through the separate passage. The separate passage terminates in an orifice near the distal end of the central opening of the cannula. In operation, when the cannula is used to provide access for a laparoscope or other viewing instrument, the end of the viewing instrument may become clouded with moisture and other debris. In this case, the end of the viewing instrument may be withdrawn into the distal end of the cannula adjacent the fluid orifice. The pump is actuated and cleansing fluid is forced over the end of the instrument cleaning away the obstructing matter without removing the instrument from the cannula. Drying air can also be supplied to the instrument, either through the same or a different separate passage. The orifice can provide a concentrated stream or a diffuse spray and can be configured to discharge the fluid with a rearward component.

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