Lung imaging for titration of mechanical ventilation

Area of Science:

• Critical care medicine
• Pulmonary imaging
• Respiratory physiology

Background:

• Computed tomography (CT) has significantly advanced the understanding of acute lung injury (ALI) and ventilator-induced lung injury (VILI).
• Emerging imaging modalities are crucial for optimizing mechanical ventilation strategies.

Purpose of the Study:

• This review presents key findings from recent studies on lung imaging techniques.
• To highlight advancements in diagnostic tools for mechanical ventilation.

Main Methods:

• Review of recent literature on positron emission tomography (PET/CT), electrical impedance tomography (EIT), and lung ultrasound (LUS).
• Analysis of CT findings related to lung aeration and recruitment maneuvers.
• Evaluation of EIT and LUS for PEEP titration and recruitment assessment.

Main Results:

• CT identifies patients unsuitable for high positive end-expiratory pressure (PEEP) due to focal aeration loss.
• PET/CT offers insights into lung inflammatory responses.
• EIT and LUS are effective for assessing lung recruitability and PEEP-induced recruitment.

Conclusions:

• Quantitative CT remains the gold standard for lung morphology assessment.
• EIT and LUS are valuable, noninvasive, radiation-free bedside tools.
• Integrating EIT and LUS with global parameters enhances understanding of lung mechanics and ventilation distribution.