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

Physiol Meas. 2023 Jan 31;44(1). doi: 10.1088/1361-6579/acb03a.

Abstract

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.Xtubecan be accurately predicted by a fitted formula, with an R2of 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 Xrsvalues of patients, improving the potential of FOT for lung function testing in mechanically ventilated newborns.

Keywords: infants; mechanical ventilation; oscillometry; respiratory mechanics.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Humans
  • Infant, Newborn
  • Intubation, Intratracheal
  • Lung*
  • Oscillometry / methods
  • Respiration, Artificial*
  • Respiratory Function Tests / methods