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NBME 6 Section 1 item 42 - yeabiruh
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05-08-2011, 10:23 PM
VA = Vt-Vd x breaths/min
Halothane → central medullary depression → ↓ VA will eventually lead to ↑ paCO2 and ↓ paO2 Severe paO2 ↓ will trigger pheripheral receptors → slight ↑ in VA
07-14-2011, 04:34 PM
Hey guys so what is the answer for this one?
Nice discussion on this one
09-03-2012, 09:37 AM
Halothane causes respiratory depression, right? That means that for a given increase in PaCO2, there will be less of an increase in alveolar ventilation than normal. Line E shows VA increasing with PaCO2, but to a lesser degree than normal. Line D also shows some degree of respiratory depression, but starts at a higher baseline PaCO2, which there is no reason for. Therefore, I think the answer is E
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