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8 Cards in this Set
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collapsing pressure =
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collapsing pressure = 2T/r
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physiologic dead space (Vdead)
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Vdead = Tv x (PaCO2 - PeCO2)/PaCO2
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pulmonary vascular resistance (PVR) =
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PVR = Ppulmonary artery - Pleft atrium/CO
(from P = QR) |
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O2 content =
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O2 content = (O2 binding capacity x %saturation) + dissolved O2
O2 binding capacity depends on Hb concentration dissolved O2 is O2 dissolved in the plasma |
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as [Hb] decreases:
O2 content % saturation PaO2 |
O2 content decreases [O2 content = (O2 binding capacity x %O2 saturation) + dissolved O2]
% saturation remains the same PaO2 remains the same |
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PAO2 =
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PAO2 = (Patm - PH2O) x FIO2 - PACO2/R
where: PH20 = 47 FIO2 = .21 R = .8 |
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total ventilation =
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total ventilation = Tv x respiratory rate
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alveolar ventilation =
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alveolar ventilation = (Tv - alveolar deadspace ventilation) x respiratory rate
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