Fio2 2 hypoventilation hypoventilation paco2

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Unformatted text preview: iO2 2. Hypoventilation Hypoventilation ( PaCO2) Hypercapnic Hypercapnic 3. V/Q mismatch Respiratory failure (eg.COPD) (eg.COPD) 4. Diffusion limitation ? 4. Diffusion 5. Intrapulmonary shunt 5. - pneumonia - Atelectasis - CHF (high pressure pulmonary edema) Causes of Hypoxemic Respiratory failure failure Caused by a disorder of heart, lung or blood. Caused Etiology easier to assess by CXR abnormality: - Normal Chest x-ray Normal Cardiac shunt (right to left) Asthma, COPD Asthma, Pulmonary embolism Pulmonary Causes of Hypoxemic Respiratory failure (cont’d.) failure • Focal infiltrates on CXR Atelectasis Atelectasis Pneumonia Pneumonia An example of intrapulmonary shunt Causes of Hypoxemic Respiratory Failure (cont’d.) (cont...
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