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Given: During open heart surgery, an extracoporeal heart - lung machine pumps a patient s blood through a oxygenator between the vena cava and the
Given: During open heart surgery, an extracoporeal heartlung machine pumps a patients blood through a oxygenator between the vena cava and the aorta. Within the oxygenator, O is bubbled through the flowing blood where it is absorbed at a rate of V O mmolmin The O and CO contents C O C CO of blood entering the device are and mlSTP ml respectively. The O content in the blood exiting the device is mlSTP ml The RQ of the device is Consider the blood in the oxygenator excluding gas bubbles as the control volume with volumetric input and output flows Q and Q
Find: a Assuming that the mass density of blood is essentially constant, what is the relationship between Q and Q during steady state operation? b Write a steadystate molar balance for O around the control volume. From this, evaluate the volumetric blood flow. c Write a steadystate molar balance for CO around the control volume. What is the uptake relationship of to V CO to V O With these equations, evaluate C CO
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