Hemodynamics, Dr. D. Penney




Peripheral Resistance Units

Resistance (in PRU's) = Perfusion Pressure / flow (per sec.)

e.g. If cardiac output = 6000 ml/min. or 100 ml/sec.
and mean aortic pressure - vena caval pressure = 100 mmHg

Then: TPR = 100 mmHg / 100 ml/sec. = 1 PRU






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