Supplemental oxygen administration is usually effective in treating hypoxemia related to

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Supplemental oxygen administration is effective in treating hypoxemia related to alveolar hypoventilation and ventilation/perfusion mismatching.When intrapulmonary shunting exists,supplemental oxygen alone is ineffective.In this situation,positive pressure is necessary to open collapsed alveoli and facilitate their participation in gas exchange.Positive pressure is delivered via invasive and noninvasive mechanical ventilation.If the patient is also experiencing hypercapnia,the PaCO₂ will be greater than 45 mm Hg.In patients with chronically elevated PaCO₂ levels,these criteria must be broadened to include a pH less than 7.35.

Supplemental Oxygen Administration Is Usually Effective in Treating Hypoxemia Related