What effect would a pulmonary embolism have on the VD/VT and the / ratios?
a. The VD/VT would increase and the / would decrease.
b. The VD/VT would decrease and the / would increase.
c. The VD/VT and the / ratios would both increase.
d. The VD/VT and the / ratios would both decrease.
D
A pulmonary embolism would reduce or block blood flow to a portion of the lungs. The alveoli would be ventilated but not perfused in the affected area, resulting in an increased / ratio. The ventilation in nonperfused alveoli is "wasted," so the VD/VT ratio would also increase.
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