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Revision as of 16:48, 20 March 2021
All of the following are true concerning V/Q ratios EXCEPT:
A. In an awake, spontaneously breathing patient, the normal matching of V/Q is 0.8
B. An absolute shunt has a V/Q value of 0.
C. Hypoxic pulmonary vasoconstriction (HPV) is an intrapulmonary mechanism that attempts to minimize V/Q mismatching.
D. Deadspace is represented by a V/Q value of 0.5.
Answer
The answer is D. Deadspace ventilation is represented by a value of infinity and certainly >0.5. All other choices are correct.
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