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

 

 

 

References

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