Bubble extraction by various arterial filters measured in vitro with Doppler ultrasound techniques

An in vitro system was constructed in order to compare the efficiency of various arterial filters in extracting oxygen bubbles from a perfusion circuit. The bubble release after passage of oxygenated perfusate through the filters was measured by Doppler techniques. All filters tested had a considerable capacity in extracting bubbles from the perfusate which was most pronounced with a depth absorption filter.