Expansible cannula

Details Expansible cannula Expansible cannula

1991-02-13

1992-08-18

Rosenbaum, C. Fred

Surgery

Instruments

Internal pressure applicator

128 3, A61M 2900

Patent

active

051395118

ABSTRACT:
The invention provides an expansible cannula (particularly useful as a trocar) comprising essentially a conical tube made of metal foil with its proximal end located in a holder, and an expander tube which can be pushed through the stem from the proximal end, to cause the stem to expand from its conical free condition to a distended cylindrical condition. The stem itself comprises a caudex which has only radial motion on expansion of the stem, and a leaf, which in addition to uncoiling on expansion of the stem is also permitted a degree of forward motion, so that the front end of the stem becomes circular in the opened condition.

REFERENCES:
patent: 4899729 (1990-02-01), Gill et al.

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