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What is In a data collected from nitrogen wash-out method in a patient, volume of nitrogen was found to be 800 mL in his residual volume (RV). How much is the RV in this patient? and explain in detail?
In all the respiratory volumes, 80% fraction is of nitrogen. Thus, if total nitrogen volume in the RV is 800 mL, then RV is 1000 mL. (80% of 1000 mL is 800 mL.)