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Questions and Answers
What is the definition of hypoxemia?
What is the definition of hypoxemia?
- Partial pressure of oxygen of less than 80 mm Hg (correct)
- Arterial blood hemoglobin saturation of less than 90%
- Arterial blood hemoglobin saturation of less than 95%
- Partial pressure of oxygen of less than 60 mm Hg
When is cyanosis manifested as a sign of hypoxemia?
When is cyanosis manifested as a sign of hypoxemia?
- Always a late sign of severe hypoxemia (correct)
- Mid-stage sign of moderate hypoxemia
- Never a sign of hypoxemia
- Early sign of mild hypoxemia
Which condition is NOT a cause of venous admixture in hypoxemia?
Which condition is NOT a cause of venous admixture in hypoxemia?
- Small airway and alveolar collapse (atelectasis)
- Low ventilation-perfusion regions
- Pulmonary embolism (correct)
- Diffusion defects
What is the definition of serious, potentially life-threatening hypoxemia?
What is the definition of serious, potentially life-threatening hypoxemia?
What happens to plasma PO2 when there is interference with the respiratory membrane?
What happens to plasma PO2 when there is interference with the respiratory membrane?
Which is often used as a surrogate marker of PaO2?
Which is often used as a surrogate marker of PaO2?
Which parameter is primarily determined by hemoglobin concentration and is not considered to be a marker of hypoxemia?
Which parameter is primarily determined by hemoglobin concentration and is not considered to be a marker of hypoxemia?
What is the normal range of PaO2 at sea level?
What is the normal range of PaO2 at sea level?
What is the driving force that leads to oxygen diffusion down to the mitochondria?
What is the driving force that leads to oxygen diffusion down to the mitochondria?
What does the observation of cyanosis commonly signal?
What does the observation of cyanosis commonly signal?
When does cyanosis manifest as a sign of hypoxemia?
When does cyanosis manifest as a sign of hypoxemia?
What are the three causes of hypoxemia?
What are the three causes of hypoxemia?
What can pulse oximeters noninvasively, continuously, and automatically monitor?
What can pulse oximeters noninvasively, continuously, and automatically monitor?
What does SaO2 use to measure hemoglobin saturation with oxygen?
What does SaO2 use to measure hemoglobin saturation with oxygen?
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