Arterial Blood Gas (ABG) Analyzer

Comprehensive ABG interpretation including pH, PaCO2, HCO3 analysis, anion gap, compensation assessment, and oxygenation evaluation.

Arterial pH. Normal 7.35-7.45.
mmHg
Arterial CO2. Normal 35-45 mmHg.
mEq/L
Calculated or measured bicarbonate. Normal 22-26.
mmHg
Arterial oxygen. Optional for oxygenation assessment.
decimal
Fraction of inspired oxygen.
mEq/L
For anion gap calculation.
mEq/L
For anion gap calculation.
g/dL
For albumin-corrected anion gap.

Enter ABG values for comprehensive analysis

References

  1. Arterial Blood Gases - MDCalc — MDCalc (2025)
  2. Acid-Base Disorders - Merck Manual — Merck Manuals (2025)

Clinical Notes & Warnings

  • Always correlate with clinical picture and electrolytes.
  • Winters formula applies to metabolic acidosis only.
  • Distinguish acute vs chronic respiratory disorders for compensation assessment.
  • Albumin correction needed for anion gap in hypoalbuminemic patients.
  • ABG alone cannot identify all mixed disorders - use delta gap when AG elevated.

The ABG analyzer combines multiple calculations: pH classification, compensation formulas, anion gap, and A-a gradient. For complete assessment, also calculate delta gap if anion gap is elevated.