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Representative radial artery pressure and venous pressure trends before (−15 to 0 s), during (0 to 35 s) and after the occlusion of the upper arm of a patient. Arm vascular occlusion equilibrium pressure (Parm) is taken as the arterial pressure 30 s after stop-flow. Note the influence of mechanical ventilation on arterial and venous pressure before and after occlusion
