Current
Suggested
Text
Text
Text
Text
Extra
- *Standard pulse oximetry cannot accurately detect methemoglobin and therefore displays a falsely low oxygen saturation reading of around 85% (methemoglobin interferes with the oximeter's light absorption measurements)
- In contrast, CO-oximetry can distinguish oxyhemoglobin, deoxyhemoglobin, methemoglobin, and carboxyhemoglobin
- A "saturation gap" occurs when PaO2 on arterial blood gas is normal but the measured oxygen saturation (e.g., on pulse oximetry) is significantly lower, as in methemoglobinemia
- Unbound dissolved O2 (PaO2) remains normal; the problem is that oxygen cannot bind to Fe3+ in methemoglobin and, when bound, cannot be adequately released to tissues, leading to cyanosis
- PaCO2 is often decreased as a result of compensatory hyperventilation
- In contrast, CO-oximetry can distinguish oxyhemoglobin, deoxyhemoglobin, methemoglobin, and carboxyhemoglobin
- A "saturation gap" occurs when PaO2 on arterial blood gas is normal but the measured oxygen saturation (e.g., on pulse oximetry) is significantly lower, as in methemoglobinemia
- Unbound dissolved O2 (PaO2) remains normal; the problem is that oxygen cannot bind to Fe3+ in methemoglobin and, when bound, cannot be adequately released to tissues, leading to cyanosis
- PaCO2 is often decreased as a result of compensatory hyperventilation
Lecture Notes
Empty field
Missed Questions
Empty field
Pathoma
Empty field
Boards and Beyond
Empty field
First Aid


Sketchy
Empty field
Sketchy 2
Empty field
Sketchy Extra
Empty field
Picmonic
Empty field
Pixorize
Empty field
Physeo
Empty field
Bootcamp
Watch associated Bootcamp video - Blood Physiology : Abnormal Oxygen Levels
Watch associated Bootcamp video - Side Effects and Toxins: Environmental Toxins and their Treatments
Watch associated Bootcamp video - Antibiotics: Pyrazinamide, Ethambutol, Dapsone, and Clofazimine
Watch associated Bootcamp video - Side Effects and Toxins: Environmental Toxins and their Treatments
Watch associated Bootcamp video - Antibiotics: Pyrazinamide, Ethambutol, Dapsone, and Clofazimine
OME
Empty field
Additional Resources


One by one
y