What is the blood PO2 level expected if the alveolar PO2 is 130 mmHg?
Understand the Problem
The question is asking about the expected blood PO2 level based on a given alveolar PO2 of 130 mmHg. This involves understanding the relationship between alveolar and arterial oxygen pressures, which typically follow a known physiological pattern.
Answer
Expected arterial blood PO2 is around 90-100 mmHg.
If the alveolar PO2 is 130 mmHg, the expected arterial blood PO2 would be slightly lower due to factors like diffusion gradient. Typically, one might expect it to be around 90-100 mmHg in a healthy individual.
Answer for screen readers
If the alveolar PO2 is 130 mmHg, the expected arterial blood PO2 would be slightly lower due to factors like diffusion gradient. Typically, one might expect it to be around 90-100 mmHg in a healthy individual.
More Information
The alveolar-arterial oxygen gradient can help assess how well oxygen transfers from the alveoli to the blood. It's usually more than 10 but less than 15 mmHg under normal conditions.
Tips
A common misconception is assuming arterial PO2 is equal to alveolar PO2, not accounting for the normal gradient.
Sources
- Alveolar Gas Equation - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
- [PDF] nificance of the alveolar-arterial oxygen tension difference - ncbi.nlm.nih.gov
- ABG (Arterial Blood Gas) | Lab Tests - GLOWM - glowm.com
