A-a Gradient
Calculate the Alveolar-arterial oxygen gradient to differentiate between pulmonary and extrapulmonary causes of hypoxemia based on ABG results.
ABG & Vitals
Clinical Precision & Methodology
The Alveolar-arterial (A-a) oxygen gradient helps identify the underlying cause of hypoxemia. By comparing the calculated oxygen in the alveoli (PAO2) to the measured oxygen in the arteries (PaO2), clinicians can pinpoint respiratory shunts or diffusion defects.
Alveolar Gas Equation
Calculates PAO2 by adjusting for inspired oxygen concentration, atmospheric pressure, water vapor pressure in the lungs, and arterial carbon dioxide divided by the respiratory quotient.
Age-Adjusted Baseline
Automatically calculates the expected "normal" gradient for the patient's age. The A-a gradient naturally widens as patients age due to physiological changes in the lungs.
Thermal Receipt Export
Generates a high-resolution, perfectly scaled PNG image designed specifically for 80mm thermal printers, enabling instant clinical handouts.