Successful retrieval and function of lungs from non-heart-beating donors.

Area of Science:

• Cardiovascular and Respiratory Medicine
• Transplantation Immunology
• Surgical Innovation

Background:

• Lung transplantation is a vital treatment for end-stage pulmonary disease.
• Organ scarcity limits lung transplantation accessibility.
• Non-heart-beating donors are an emerging alternative organ source.

Purpose of the Study:

• To evaluate the efficacy of rapid in situ cooling methods for cadaver lungs from non-heart-beating donors.
• To assess the impact of different flushing techniques on pulmonary function and morphology.
• To compare outcomes with lungs from heart-beating donors.

Main Methods:

• A rabbit non-heart-beating donor model was employed.
• Two cooling methods were tested: bilateral chest cavity flushing and pulmonary artery flush with pleural cavity flushing.
• Pulmonary function and morphology were assessed after a 2-hour reperfusion period.

Main Results:

• No significant differences were observed in pulmonary artery pressure, vascular resistance, or compliance among the groups.
• Arteriovenous oxygen, lung wet/dry weight ratio, and lung morphology remained comparable across all groups.
• The tested cooling methods effectively preserved lung viability.

Conclusions:

• Bilateral chest cavity flushing, with or without pulmonary flush, protects cadaver lung function and morphology.
• These rapid cooling techniques render non-heart-beating donor lungs suitable for transplantation.
• This approach offers a promising solution to overcome donor lung shortages.