Figure 5.

Correlation between internal volume and humidity delivered in Eckerbom's study. The programming of the ventilator corresponds to "Setting II" of the study (tidal volume of 500 -mL, respiratory frequency of 20 breaths per minute). Pearson's correlation coefficient was used for the statistical analysis.

Source: Based on data from the study: Eckerbom B, Lindholm CE. Performance evaluation of six heat and moisture exchangers according to the Draft International Standard (ISO/DIS 9360). Acta Anaesthesiol Scand. 1990;34(5):404-9.⁽¹⁶⁾