Fig. 5
From: Inhaled drug delivery: a randomized study in intubated patients with healthy lungs
Correlation between inhaled doses of radiolabel measured in vitro in a filter positioned at the distal tip of the endotracheal tube and lung deposition of radiolabel measured in vivo using planar scintigraphy. Data are expressed as a percentage of the nominal dose. A correlation was found for the whole dataset (R = 0.768, p < 0.001). The dashed line is the line of identity and the plain line is the regression line with the corresponding equation. ETT endotracheal tube, HH heated humidifier, SCAT specific ventilator circuit for aerosol therapy