Patient self-inflicted lung injury an important phenomenon.

Area of Science:

• Critical Care Medicine
• Respiratory Physiology
• Pulmonary Rehabilitation

Background:

• Mechanical ventilation is crucial for acute hypoxemic respiratory failure (AHRF).
• Excessive patient inspiratory effort can lead to patient self-inflicted lung injury (P-SILI), worsening outcomes.
• Understanding P-SILI mechanisms is vital for optimizing ventilation strategies.

Purpose of the Study:

• To review mechanistic insights into P-SILI.
• To summarize preclinical and clinical evidence of P-SILI.
• To outline current strategies for preventing P-SILI while preserving diaphragm function.

Main Methods:

• Review of mechanistic insights into P-SILI.
• Analysis of preclinical experimental studies on lung and diaphragm injury.
• Evaluation of clinical investigations linking inspiratory effort to patient outcomes.
• Assessment of emerging and established P-SILI prevention strategies.

Main Results:

• Preclinical studies demonstrate that vigorous inspiratory efforts exacerbate lung injury and diaphragm damage.
• Positive end-expiratory pressure (PEEP) and continuous positive airway pressure (CPAP) can mitigate injury.
• Clinical data link high inspiratory effort to increased mortality, ventilator dependence, and complications.
• Various interventions, including sedation, neuromuscular blockade, and extracorporeal CO2 removal, are discussed.

Conclusions:

• P-SILI results from excessive inspiratory effort causing lung and diaphragm stress.
• Preventive strategies should focus on modulating, not eliminating, patient effort.
• Integrated approaches involving ventilatory settings, sedation, and drive modulation are recommended.