You have a subject with the following ABGs sampled at rest: PO2 65, PCO2 42, FIO

Question

You have a subject with the following ABGs sampled at rest: PO2 65, PCO2 42, FIO2 0.35, PBar 690 mm Hg. Next you perform an exercise test & measure a minute ventilation of 13 liters/minute, and respiratory rate of 40/min. You thern draw another ABG with values of: PO2 45, PCO2 52 on the same FIO2. Select either correct or incorrect for each of the following statements At rest there is evidence of low V/Q A. Correct B. # At rest the subject is hypventilating # 1 Exercise demonstrates presence of a diffusion defect # With exercise the subject is hyp°ventilating. During exercise the tidal volume = 3.07 liters The change in the subject's PCO2 can be explained by a reduced capillary transit time associated with increased cardiac output

Explanation / Answer

At rest there is evidence of low V/Q - Correct

At rest the subject is hypoventilating - Correct

Exercise demonstrates presence of a diffusion defect - Correct

With exercise the subject is hypoventilating - Incorrect

During exercise the tidal volume = 3.07 liters - Correct

The change in the subject's PCO2 can be explained by a reduced capillary transit time associated with increased cardiac output - Correct

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