Calibration of ventilation/perfusion match in electrical impedance tomography: a novel method based on arterial blood pressure.

ABSTRACT:

Introduction

Electrical impedance tomography (EIT) enables non-invasive, continuous, bedside evaluation of ventilation/perfusion (V/Q) match. To avoid the presence of invasive monitoring for cardiac output in relative V/Q ratio calculation, we proposed a novel calibration method based on arterial blood pressure to optimize EIT V/Q match assessments.

Methods

We involved 12 mechanically ventilated piglets in three experimental phases: baseline, pulmonary embolism, and atelectasis. After a thorough measurement of EIT signals, arterial blood pressure, cardiac output, and additional physiological parameters, EIT V/Q match was evaluated using existing area limited method (ALM), cardiac output calibrated method (COCM), and our proposed novel blood pressure calibrated method (BPCM).

SUBMITTER: Han T 

PROVIDER: S-EPMC11966062 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature