Setting positive end-expiratory pressure by using electrical impedance tomography.

Area of Science:

• Critical Care Medicine
• Respiratory Physiology
• Medical Imaging Technology

Background:

• Positive end-expiratory pressure (PEEP) management is crucial for mechanically ventilated patients.
• Individualized PEEP settings can optimize lung function and reduce ventilator-induced lung injury.
• Electrical impedance tomography (EIT) offers bedside, real-time monitoring of regional lung ventilation.

Approach:

• This review synthesizes findings from studies (Jan 2022-June 2023) using EIT for PEEP assessment.
• Analyzed EIT parameters include tidal impedance variation, ventilation distribution, inhomogeneity, and regional compliance.
• Explored the application of contrast-enhanced EIT for ventilation/perfusion matching.

Key Points:

• EIT analysis primarily focused on spatial ventilation distribution during incremental/decremental PEEP.
• Commonly used EIT parameters assess ventilation homogeneity and identify poorly ventilated lung regions.
• Studies applied EIT across neonatal, pediatric, and adult intensive care populations.

Conclusions:

• Commercial EIT devices are increasingly used in clinical settings, demonstrating growing interest.
• EIT provides valuable insights into regional lung mechanics for PEEP optimization.
• Further exploitation of EIT data is needed to fully integrate it into clinical decision-making for PEEP titration.