Podcast
Questions and Answers
Which factor determines how much oxygen blood has the capacity to carry?
Which factor determines how much oxygen blood has the capacity to carry?
- Percentage of free O2 molecules
- Pulse oximetry accuracy
- Partial pressure of O2
- Saturation of Hb with O2 (correct)
What is the significance of Po2 in blood?
What is the significance of Po2 in blood?
- Reflects the Hb concentration
- Determines the oxygen content of arterial blood (correct)
- Indicates the amount of free O2 in blood
- Measures the oxygen saturation in venous blood
What does SaO2 measure in blood?
What does SaO2 measure in blood?
- Oxygen content in venous blood
- Hemoglobin concentration
- Oxygen saturation in arterial blood (correct)
- Partial pressure of CO2
Why is pulse oximetry less accurate at saturations below 75%?
Why is pulse oximetry less accurate at saturations below 75%?
What does Po2 regulate in the context of O2 molecules binding to Hb?
What does Po2 regulate in the context of O2 molecules binding to Hb?
Why is the percentage of Hb saturated with O2 markedly reduced in CO poisoning?
Why is the percentage of Hb saturated with O2 markedly reduced in CO poisoning?
Why is SaO2 reduced in CO poisoning even when PaO2 is high?
Why is SaO2 reduced in CO poisoning even when PaO2 is high?
What effect does a higher Po2 have on So2 according to the text?
What effect does a higher Po2 have on So2 according to the text?
Why does SaO2 appear normal in CO poisoning according to the text?
Why does SaO2 appear normal in CO poisoning according to the text?
In which part of the oxyhaemoglobin dissociation curve do changes in Po2 have a relatively little effect on So2?
In which part of the oxyhaemoglobin dissociation curve do changes in Po2 have a relatively little effect on So2?
How does the presence of CO affect the measurement of SO2 in ABG analysis?
How does the presence of CO affect the measurement of SO2 in ABG analysis?
At approximately what Pao2 level is hemoglobin maximally saturated according to the text?
At approximately what Pao2 level is hemoglobin maximally saturated according to the text?
