Improved 20-hour canine lung preservation with a new solution--ET-Kyoto solution

Area of Science:

• Transplantation Science
• Organ Preservation
• Surgical Innovation

Background:

• Effective lung preservation is critical for successful lung transplantation.
• Current preservation solutions like Euro-Collins (EC) have limitations.
• Optimizing preservation solutions can improve post-transplant outcomes.

Purpose of the Study:

• To evaluate the efficacy of a novel ET-Kyoto (ET-K) solution for 20-hour lung preservation.
• To compare ET-K solution with the standard Euro-Collins (EC) solution, with and without prostaglandin E1 (PGE1) pretreatment.
• To assess the impact of preservation solutions on canine lung graft function and viability.

Main Methods:

• A canine left lung transplantation model was utilized.
• Lungs were preserved for 20 hours at 4°C using ET-K solution, EC solution + PGE1, or EC solution alone.
• Lung graft function was assessed post-transplantation by measuring arterial oxygen pressure (PaO2), peak inspiratory pressure, and pulmonary vascular resistance.

Main Results:

• The ET-K group exhibited significantly higher PaO2 compared to both EC + PGE1 and EC groups.
• Lower peak inspiratory pressure and wet-to-dry weight ratios were observed in the ET-K group.
• Histological analysis revealed no pulmonary edema in the ET-K group, unlike the EC groups.

Conclusions:

• ET-Kyoto solution is superior to Euro-Collins solution for 20-hour lung preservation in a canine model.
• ET-K solution effectively preserves lung function and prevents edema formation.
• This novel solution holds promise for improving lung transplantation outcomes.