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1. Enter the pH, partial pressures of oxygen and carbon dioxide, and the calculated bicarbonate directly from the ABG.
2. Give the current anion from the most recent electrolyte panel. Only these fields are required for the calculator to work.
3 (optional). You can also supply additional information such as the prior anion gap, timing of symptoms, and whether there is a known lactic acidosis or ketosis.
These supplemental fields can cause the interpreter to give additional information.
An anion gap calculator is given for convenience.