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Old 08-10-2012
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Lungs What would change in pulmonary parameters in PE

An 80-year-old man with thrombophlebitis in one leg develops a pulmonary embolus that completely blocks blood flow to the upper lobe of his left lung. What would most likely increase as a result?

a) Forced expiratory volume at 1 second to forced vital capacity (FEV1/FVC) ratio
b) Functional residual capacity (FRC)
c) Physiologic dead space
d) Physiologic shunt flow
e) Residual volume (RV)
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Old 08-10-2012
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CPhysiologic dead space i guess
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Old 08-11-2012
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C , in pulmonar embolus, there is normal ventilation but abnormal perfussion
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Old 08-12-2012
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Is it FRC?
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Old 08-12-2012
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Quote:
Originally Posted by koolkiller88 View Post
Is it FRC?
dead space increases in PE, vent present but no perfusion.

v/q = v/ 0 in this case, an example of high v/q ratio.
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Old 08-13-2012
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C i would say too but i don't see how it cant be E???
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Old 08-14-2012
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Would go with C..
Cassandra, what's the correct answer?
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Old 08-17-2012
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Default correct answer

The answer is c) Physiologic dead space

A region of the lung that continues to be ventilated but receives no pulmonary blood flow because of a pulmonary embolism would become alveolar dead space. This would increase the physiologic dead space, which includes both the anatomic dead space and the alveolar dead space.
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