Influence of neonatal endotracheal tube dimensions on oscillometry-acquired reactance: a bench study

Objective. To examine the influence of the endotracheal tube (ETT) on respiratory reactance (Xrs) measured with the forced oscillation technique (FOT) and develop a correction method for it. Approach. In a bench study, the reactance of ETTs (Xtube) with different dimensions was measured on a breathing test lung in various respiratory settings. Main results. Xtube can be accurately predicted by a fitted formula, with an R2 of 0.97, with negligible effects due to changes in respiratory pattern and lung volume. Significance. The developed formula offers the ability to measure ETT-independent Xrs values of patients, improving the potential of FOT for lung function testing in mechanically ventilated newborns.

Source: Physiological Measurement - January 31, 2023 Category: Physiology Authors: Rosemijne R W P Pigmans, Ruud W van Leuteren, Anouk W J Scholten, Chiara Veneroni, Anton H van Kaam, Jeroen Hutten, Raffaele L Dellac à and Frans H C de Jongh Source Type: research