A nurse educator is reviewing the implications of the oxyhemoglobin dissociation curve with regard to the case of a current patient. The patient currently has normal hemoglobin levels, but significantly decreased $\mathrm{SaO}_{2}$ and $\mathrm{PaO}_{2}$ levels. What is an implication of this physiological state?

Question

Quizplus · Accepted Answer

With a normal hemoglobin level of $15 \mathrm{mg} / \mathrm{dL}$ and a $\mathrm{PaO}_{2}$ level of $40 \mathrm{~mm} \mathrm{Hg}\left(\mathrm{SaO}_{2} 75 \%\right)$, there is adequate oxygen available for the tissues, but no reserve for physiological stresses that increase tissue oxygen demand. If a serious incident occurs (e.g., bronchospasm, aspiration, hypotension, or cardiac dysrhythmias) that reduces the intake of oxygen from the lungs, tissue hypoxia results.

A Nurse Educator Is Reviewing the Implications of the Oxyhemoglobin SaO2\mathrm{SaO}_{2}SaO2​

A Nurse Educator Is Reviewing the Implications of the Oxyhemoglobin $\mathrm{SaO}_{2}$