Lung Recruitment Maneuvers During Invasive Mechanical Ventilation: Single-Center Retrospective PICU Cohort Study,...

Area of Science:

• Pediatric Critical Care Medicine
• Respiratory Physiology
• Mechanical Ventilation

Background:

• Recruitment maneuvers (RMs) are used in invasive mechanical ventilation (IMV) for acute hypoxemic respiratory failure.
• Their specific impact and patient selection criteria in pediatric populations are not well-characterized.

Purpose of the Study:

• To describe changes in oxygenation and dynamic compliance following RMs in pediatric patients.
• To identify patient characteristics that predict benefit from RMs using machine learning.

Main Methods:

• Retrospective cohort study of 479 pediatric patients undergoing IMV with at least one RM.
• Analysis of oxygenation (PaO2/FiO2 ratio) and dynamic compliance changes before and after RMs.
• Multivariable modeling and machine learning to identify predictors of response.

Main Results:

• Baseline PaO2/FiO2 ratio and initial positive end-expiratory pressure (PEEP) level were associated with oxygenation response.
• Lower PEEP levels compared to standard tables showed a >3-fold increased odds of oxygenation response.
• Recruitment delta in pressure correlated with lower odds of compliance response.

Conclusions:

• Recruitment maneuvers in pediatric IMV are associated with varied physiological responses.
• Lower PEEP settings may identify pediatric patients who are more likely to benefit from RMs.
• These findings can inform clinical decision-making regarding RM use in pediatric critical care.