cannula

Attached to the handle was a thumb-rest and a tube for removing or adding fluids and a perforator within the cannula.

Inside the cannula is fixed by oxidation an obturator, which carries on its end a small handle fixed on in T-fashion.

The iodoform is injected by means of a glass-barrelled syringe, which is firmly screwed on to the cannula.

Wind colic may need prompt use of the trocar and cannula to puncture high up in the right flank for liberation of gas.

The tube, thus prepared, was connected with the artery by a fine cannula, exactly fitting the artery.