Theoretical and practical perioperative considerations protective ventilation in lung transplantation

Area of Science:

• Pulmonary Medicine
• Transplant Surgery
• Critical Care

Background:

• Protective ventilation is crucial in lung transplantation but current practices often rely on data from intensive care and elective surgery.
• Lung transplantation involves unique challenges due to diverse end-stage lung diseases and graft-specific factors.

Purpose of the Study:

• To review the pathophysiology of major end-stage lung diseases and their impact on mechanical ventilation during lung transplantation.
• To explore the 'multiple-hits' model of lung allograft injury and the role of ex-vivo lung perfusion (EVLP).
• To advocate for personalized ventilation strategies and early extubation to minimize ventilator-induced lung injury (VILI).

Main Methods:

• Review of current literature on protective ventilation in lung transplantation.
• Analysis of the pathophysiology of four main end-stage lung diseases.
• Discussion of mechanical power, lung compliance heterogeneity, and the multiple-hits model.
• Exploration of ex-vivo lung perfusion (EVLP) for graft assessment and ventilation optimization.

Main Results:

• End-stage lung diseases exhibit distinct characteristics and significant heterogeneity in pulmonary compliance, necessitating personalized ventilator settings.
• The 'multiple-hits' model highlights cumulative risk factors contributing to lung allograft injury from donor to post-implantation.
• EVLP presents a promising platform for assessing graft quality and developing tailored ventilation strategies.

Conclusions:

• Recognizing and addressing lung compliance heterogeneity is fundamental to preventing ventilator-induced lung injury (VILI) in lung transplant recipients.
• Optimizing mechanical power and utilizing EVLP can guide ventilation strategies to protect both host and graft lungs.
• Early extubation and rehabilitation are recommended to reduce VILI and improve patient outcomes post-transplantation.