These are the equations used to arrive at the numbers which the machine spews out after you have done a thermodilution, as well as the normal ranges for those numbers.

To derive EVLW from measured variables:


EVLW equation expanded


CO: Cardiac Output


cardiac output queation PiCCO summary



CI: Cardiac Index



ITTV: Intrathoracic Thermal Volume



ITTV equation


PTV: Pulmonary Thermal Volume

ITTV equation


GEDV: Global End-Diastolic Volume



GEDI: Global End-Diastolic Index




ITBV: IntraThoracic Blood Volume



ITBI: IntraThoracic Blood Volume Index



EVLW: Extravascular Lung Water



EVLWI: Extravascular Lung Water Index



CFI: Cardiac Function Index



GEF: Global Ejection Fraction



PVPI: Pulmonary Vascular Permeability Index



SV: Stroke volume



SVI: Stroke Volume Index



SVV: Stroke Volume Variation



dPmax: maximum left ventricular contractility





From Bersten and Soni’s” Oh's Intensive Care Manual”, 6th Edition, as well as who are sadly the best source for this sort of information.