Why Is It Necessary to Keep the Patient's PaO₂ Greater

question 69

Multiple Choice

Why is it necessary to keep the patient's PaO₂ greater than 60 mm Hg?

• A) A level of 60 mm Hg marks the beginning of the steep part of O₂Hb dissociation curve.
• B) Below the 60 mm Hg level, tissue hypoxia is ensured.
• C) Oxygen deprivation will cause severe cerebral vasoconstriction below 60 mm Hg.
• D) The PaCO₂ will start to rise precipitously if the PaO₂ falls further.

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