cliot (version 1.0.0)

fick_cardiac_output: Cardiac Output (Fick's Formula)

Description

Calculates Cardiac Output using the Fick principle, which states that the blood flow through an organ is equal to the uptake or release of a substance by that organ divided by the arteriovenous difference of that substance. In this context, oxygen is the substance used.

Usage

fick_cardiac_output(hemoglobin_g_dl, sa_o2_percent, sv_o2_percent,
                    vo2_ml_min, pa_o2_mmhg = NULL, pv_o2_mmhg = NULL)

Value

A list containing:

Cardiac_Output_L_min

The calculated cardiac output in Liters per minute.

Arterial_O2_Content_mL_dL

Calculated arterial oxygen content (CaO2).

Venous_O2_Content_mL_dL

Calculated venous oxygen content (CvO2).

AV_O2_Difference_mL_dL

The arteriovenous oxygen difference.

Arguments

hemoglobin_g_dl

Numeric. Hemoglobin concentration in g/dL.

sa_o2_percent

Numeric. Arterial Oxygen Saturation percentage (e.g., 98).

sv_o2_percent

Numeric. Mixed Venous Oxygen Saturation percentage (e.g., 75).

vo2_ml_min

Numeric. Oxygen Consumption in mL/min. This can be a measured value or an estimated value (often 125 mL/min/m2 * BSA).

pa_o2_mmhg

Numeric (Optional). Arterial partial pressure of oxygen. Used to calculate dissolved oxygen content.

pv_o2_mmhg

Numeric (Optional). Venous partial pressure of oxygen. Used to calculate dissolved oxygen content.

References

Fick A. Uber die messung des blutquantums in den herzventrikeln. Sitzungsberichte der Physikalisch-Medizinischen Gesellschaft zu Wurzburg. 1870;2:16.

Examples

# Example 1: Standard Values
# Hgb 13 g/dL, SaO2 98%, SvO2 70%, VO2 250 mL/min
fick_cardiac_output(13, 98, 70, 250)

# Example 2: Including Dissolved Oxygen
# Hgb 10 g/dL, SaO2 100%, SvO2 60%, VO2 200 mL/min, PaO2 100, PvO2 35
fick_cardiac_output(10, 100, 60, 200, 100, 35)