A fine ivory and silver syringe with trocar and silver cannula by Maw Sons & Thompson dating to the late 19th Century.
This is the antique equivalent to a modern “venflon”. The trocar, sheathed in its silver cannula would be initially be inserted either into a vein, or into a fluid filled space. With the trocar removed the syringe could be attached to the cannula to remove the bulk of fluid or blood immediately. The cannula could then be left in place to allow continuing drainage. The set comes in a leather velvet and silk lined case.