Regional expiratory time constants in severe respiratory failure estimated by electrical impedance tomography: a feasibility study.

ABSTRACT:

Background

Electrical impedance tomography (EIT) has been used to guide mechanical ventilation in ICU patients with lung collapse. Its use in patients with obstructive pulmonary diseases has been rare since obstructions could not be monitored on a regional level at the bedside. The current study therefore determines breath-by-breath regional expiratory time constants in intubated patients with chronic obstructive pulmonary disease (COPD) and acute respiratory distress syndrome (ARDS).

Methods

Expiratory time constants calculated from the global impedance EIT signal were compared to the pneumatic volume signals measured with an electronic pneumotachograph. EIT-derived expiratory time constants were additionally determined on a regional and pixelwise level. However, regional E

SUBMITTER: Karagiannidis C 

PROVIDER: S-EPMC6148957 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature