An estimation of volume of fluid by using Polyethylene Glycols (PEG) as a marker: An in vitro study.

Polyethylene glycols are non-digestable and non-ansorbable substances, being used extensively in studies of the DI tracts. When amount and concentration of PEGs are known, then the volume of fluid could be estimated. From the in vitro study, we measured the substances at 5 different concentrations. The results showed that the volumes of fluid estimated were about 7 percent higher than the actual. From this study we could conclude that the accuracy of the measurement is within 7 percent of the estimated volume, which will be used as a reference for further related study.