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9 Cards in this Set
- Front
- Back
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Describe West Zone 1
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High up, PA>Pa -> collapse of blood vesels, perfused but not ventilated
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Describe West Zone 2
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Middle, Pa>PA -> perfusion, also ventilation. Less V/Q mismatch
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Describe West Zone 3
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Lower lungs, Pa and Pv > PA, good perfusion, less ventilation
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What is normal deadspace?
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2 cc/kg
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What is the Bohr equation?
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Vd/Vt =(PaCO2-PEtCO2)/PaCO2
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What is normal deadspace? [% volume]
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Approx 30% of tidal volume
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What is significantly abnormal deadspace? [% TV]
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>50% of tidal volume
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Is heparin necessary for an ABG?
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No
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What is the effect of temperature on ABGs?
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As blood cools, CO2 dissolves into the solution, decreasing pCO2
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