Abstract
Pulse dye densitometry (PDD) is the method which obtains cardiac output (CO) easily, by injecting Indocyanine green (ICG) dye into a vein and measures plethysmogram using nasal wing clip sensor. Cardiac output is calculated by dividing the amount of injected ICG by the area under the first circulation curve of dye densitogram. PDD can also provide the mean transit time (MTT) which is average time until the indicator have arrived at the sensor position. As MTT has negative correlation with CO, we made regression models using MTT for calculating CO. We calculated CO from regression models and compared it to CO by the thermo dilution method (COtd). CO from regression models agrees well with COtd.
