Power-assisted injection of contrast material into an antecubital vein
is commonly used in CT and has been proven superior to manual injecti
on. Power-assisted injection through a central line bares the risk of
rupturing the line because manual control over the pressure applied by
the power injector is lacking. We present a simple safety device whic
h allows manual control of the pressure by means of an interposed thre
e-way stopcock combined with a small syringe for pressure equalization
.