Fick Cardiac Output / Cardiac Index

Applies the Fick principle to estimate cardiac output and cardiac index in adults from oxygen consumption and the arteriovenous oxygen-content difference (with stroke volume when a heart rate is given), to support hemodynamic assessment at the bedside or in the cath lab.

VO2 source

Measured VO2 (mL/min) — only for Measured mode

Body surface area (m²) — required (used for CI in all modes)

Body weight (kg) — only for the 3 mL/kg mode

Hemoglobin (g/dL)

Arterial O2 saturation SaO2 (% or fraction)

Mixed venous O2 saturation SvO2 (% or fraction)

Heart rate (bpm) — optional (blank = stroke volume not reported)