Hemodynamics

Oxygen Delivery (DO₂) Calculator

Oxygen carried to the tissues each minute, cardiac output times arterial oxygen content; falls with low output, anemia or hypoxemia.

Reviewed by Alex G, BSN, RN, CEN, CCRN, CMC, NREMT-P · From the Reference tab of the app

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Formula

DO₂ = CO × CaO₂ × 10

Reference: Normal 950–1150

How it is used

• Normal DO₂ is 950–1150 mL/min, about 1,000 at rest.
• To increase DO₂, you must increase Cardiac Output (CO), Hemoglobin, or Oxygen Saturation (SpO₂).

Same formula as the app. Open it in the web app.

Related one-pagers

• Hemodynamic NormalsDO2 · 950–1150 · mL/min
• Shock Types at a GlanceDO₂ = CO × CaO₂ × 10; hemoglobin and CO are the biggest levers, dissolved oxygen the smallest.
• ECMO EssentialsDrainage saturation · VV 60–75%; VA ≥66% · VV over 80%: recirculation; VA falling: low DO₂
• ABG Interpretation in 6 StepsCaO₂ = (1.34 × Hb × SaO₂) + (0.003 × PaO₂): Hb 15, SaO₂ 0.98 and PaO₂ 100 give 19.7 + 0.3 = 20 mL/dL (sources use 1.34 to 1.39). DO₂ = cardiac output × CaO₂ × 10, about 1,000 mL/min, against a VO₂ of about 250, so extraction is about 25% and SvO₂ 65–75%. With Hb 8, SaO₂ 0.90 and PaO₂ 60, CaO₂ is 9.8. Raising PaO₂ to 100 (SaO₂ 0.98) gives 10.8, a 10% gain; raising Hb to 10 gives 12.2, a 25% gain; a 20% rise in cardiac output raises DO₂ by 20%.

Related calculators

• Cardiac Index (CI)
• Cardiac Output (Fick Principle)
• Cerebral Perfusion Pressure (CPP)
• Mean Arterial Pressure (MAP)
• Pulmonary Vascular Resistance (PVR)
• QTc (Bazett)
• Shock Index
• Stroke Volume (SV)

For education and exam preparation only. Follow your institution’s protocols. For education and exam preparation only. Verify results independently and follow your local protocols and medical direction. Not a substitute for clinical judgment.