Template:Aa Gradient Calculator: Difference between revisions
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* '''Normal A-a gradient''' ≈ (Age/4) + 4 on room air | * '''Normal A-a gradient''' ≈ (Age/4) + 4 on room air | ||
* '''Elevated A-a gradient''' suggests: V/Q mismatch, shunt, or diffusion impairment | * '''Elevated A-a gradient''' suggests: [[Pulmonary embolism|V/Q mismatch]], [[Respiratory failure|shunt]], or diffusion impairment | ||
* '''Normal A-a gradient + hypoxia''' suggests: hypoventilation or low FiO₂ | * '''Normal A-a gradient + hypoxia''' suggests: hypoventilation or low FiO₂ | ||
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Latest revision as of 16:50, 21 March 2026
Interactive A-a O₂ Gradient calculator. Requires the calculator gadget.
Usage: {{Aa Gradient Calculator}}
A-a O₂ Gradient
| Parameter | Value |
|---|---|
| Age (years) | |
| FiO₂ (%) | |
| PaCO₂ (mmHg) | |
| PaO₂ (mmHg) | |
| A-a Gradient | mmHg |
| Expected A-a | mmHg (age-adjusted normal) |
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