Surgical instrument consisting of a sharp stylet enclosed in a tube (cannula) and inserted through the wall of a body cavity: the stylet is withdrawn permitting fluid to drain off through the tube. Suggested that it was used for ovariotomies in a mental health hospital in Victoria, Australia circa 1930. May have been used for the removal of fluid from the ovary so that ovarian tumours could be surgically removed.

Physical Description

Trocar with inner cannula for ovariotomy. Trocar is a brass tube with a sharply pointed, tubular steel blade on one end. The other end has an open- ended cap with a slit that leads down from the rim. The movement of the cannula, a brass tube which slides down inside the trocar, is controlled by the complicated path of the slit at the top of the trocar.

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