Electrical impedance tomography: potentials and pitfalls.

Area of Science:

• Medical Imaging
• Respiratory Physiology
• Critical Care Medicine

Background:

• Electrical impedance tomography (EIT) is an emerging noninvasive imaging technique.
• EIT offers potential for real-time monitoring of ventilation and lung mechanics.
• Clinical adoption of EIT requires balancing its capabilities with scientific rigor.

Purpose of the Study:

• To review the current state of Electrical impedance tomography (EIT) as a clinical monitoring tool.
• To discuss the trade-offs between EIT's clinical utility and the demand for perfect accuracy.
• To highlight recent advancements in EIT for monitoring lung volume and regional ventilation.

Main Methods:

• Review of recent studies on EIT for ventilation monitoring.
• Analysis of the scientific debate regarding EIT's accuracy and clinical application.
• Evaluation of emerging indices for regional ventilation distribution.

Main Results:

• Recent studies have resolved the controversy regarding the safe use of EIT for monitoring lung volume changes.
• EIT measurements of lung volume changes can now be displayed in clinical units (millilitres) after calibration.
• New indices for regional ventilation distribution are emerging and require further evaluation for clinical decision support.

Conclusions:

• Electrical impedance tomography (EIT) is already a valuable clinical monitoring tool.
• Continued research is necessary to develop and interpret simple EIT indices for clinical use.
• EIT has the potential to guide clinicians toward effective and safe ventilator management.