Trocar with a retractable cannula

Details Trocar with a retractable cannula Trocar with a retractable cannula

A - Human Necessities

61

B

A61B 17/34 (2006.01) A61B 17/00 (2006.01)

Patent

CA 2134174

- 11 - Abstract A trocar wherein the cannula can derive a varying length. The cannula contains a distal portion and a proximal portion. The distal portion is retractable with respect to the proximal portion. Generally, the distal portion retracts around the outside of the proximal portion. There is disposed a sealing between the distal and proximal portions, to allow for sealing of the proximal portion wall with respect to the puncture cite, to enhance insufflation. There is further disclosed a mechanism which causes the distal portion to lock with respect to the proximal portion. Furthermore, the obturator contains a latching mechanism which mates with the distal portion. When the obturator is retracted, this latching mechanism may be actuated by an actuation mechanism contained in the handle of the obturator.

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