Safety of high pressure injections through a flow switch stopcock.

The safety and efficacy of high-pressure injection through a stopcock was tested using a disposable flow switch model. Multiple catheters, contrast agents, injection rates, and pressure combinations were used. These demonstrated that, after insuring the adequacy of the stopcock connections, there will be no leakage, decrease in injection rate, or increase in required pressure when injecting through the flow switch stopcock even at levels appropriate for aortic and pulmonary arteriography.