Shear Stress, Energy Losses, and Costs: A Resolved Dilemma of Pulsatile Cardiac Assist Devices
Figure 2
(a) Mock circulation: energy losses circuit (I). 1 is arterial perfusion line; 2 is pulsatile tube; 3 is aortic cannula; 4 is venous line; 5 is pressures lines; 6 is partial tube clamp (simulated resistance). (b) Mock circulations with 3 different tube positions. Pulsatile tube was positioned at 6 cm distance from aortic cannula; Pulsatile tube positioned at 150 cm distance from aortic cannula; Pulsatile tube wedged between roller pump and oxygenator. 1 is roller pump; 2 is oxygenator; 3 is arterial line; 4 is pulsatile tube; 5 is aortic cannula; 6 is resistance (tube clamp); 7 is venous line. P1, P2, P3, P4, and P5 are perfusion pressures recording spots.
