1
Q
Methemoglobinemia
A
altered state of Hgb where Fe2+ is oxidized to Fe3+
– anemic hypoxia and cyanosis develops –> MetHgb cannot bind O2 –> tissue oxygenation becomes impaired at >30%
2
Q
ABG of methemoglobinemia
A
Metabolic acidosis with low HCO3 and base deficit
- pulse ox will be ~85%
3
Q
supplemental O2 for methemoglobinemia
A
it will only change PaO2
- SpO2 won’t change
Hard Core Physiology
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