In which of the following disorders would an increased VD/VT ratio not be likely?
a. Congestive heart failure
b. Pulmonary embolism
c. Acute lung injury
d. Hypothalamus tumor
ANS: D
Frequently the VD/VT ratio is increased in patients with congestive heart failure, pulmonary em-bolism, acute lung injury, or pulmonary hypertension and in patients undergoing mechanical ven-tilation.
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