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10 Cards in this Set
- Front
- Back
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Describe the diagnosis of diffusion abnormality
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Normal PaCO2, increased A-a gradient, may response to 100% FiO2
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Describe the diagnosis of decreased FiO2
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Normal PaCO2, normal A-a gradient, response to 100% FiO2
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What is normal anatomic shunt?
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2-5%
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What is a true shunt?
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Blood from right heart enters left heart without exchanging gas
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What are causes of absolute shunt?
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Lobar atalectasis, Pulmonary edema, Acute lung injury, Bilateral pneumonia
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What is compensation for absolute shunt?
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Increased CO, Decreased O2 utilization, changes in pulmonary distribution of perfusion to decrease shunt
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What is the most common cause of hypoxemia in anesthesia?
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relative shunt
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What does relative shunt respond well to?
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O2
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What is a normal acceptable v/q?
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>.75
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What is the v/q in the bases?
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0.63
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