Antique Trocar and Cannulae set. Antique surgical instrument. There are four Trocars each with it's own Cannula in this set, nesting together and interchangeable. The Cannulae Trocars are used to puncture areas in the body to release build ups of fluid or gas, the Cannulae act as an anti bacterial sheath for the Trocar to protect against infection.
 
The closed item measures 14cm (5.51") in length.
 
The catalogue page shown here, showing the Trocar, is from 1863.