Lung Preservation

Cold storage reduces cellular metabolism, which lowers the lungs’ energy demand while they are separated from the recipient. This reduction helps limit injury caused by the period of inadequate blood supply, known as ischemia, and by subsequent restoration of circulation, called reperfusion. The strategy therefore focuses on preserving viability until transplantation rather than assessing organ performance during storage.

In ex vivo perfusion, an oxygenated solution circulates through the lungs outside the body. This provides controlled support while allowing the transplant team to assess how the organs function before implantation. The approach adds information that static storage alone cannot provide and may help determine whether lungs that initially appear unsuitable can be considered for transplantation.

Lung Preservation strategies differ in what they offer during the interval before transplantation. Cold storage primarily limits cellular metabolism, whereas normothermic ex vivo lung perfusion can provide circulating oxygenated support and enable functional assessment. This distinction matters when teams need more than transport protection, particularly for organs requiring evaluation or possible repair before a final transplant decision.

A preservation pathway begins after donor-lung retrieval and continues through the period before transplantation. Teams may maintain the lungs with cold storage or, in selected cases, connect them to an ex vivo circuit that circulates oxygenated perfusion solution. The chosen approach supports viability, and perfusion can add functional information before the organs reach the recipient.

Teams use these methods when donor lungs must travel or when their initial suitability is uncertain. Cold preservation can help extend transport time, while ex vivo perfusion offers a way to evaluate function under controlled support. Together, these options can improve donor-lung utilization by giving transplant teams additional opportunities to preserve and assess organs.

Normothermic ex vivo lung perfusion has particular relevance to medicine because it supports individualized assessment rather than relying only on the lungs’ initial appearance. In selected cases, the platform may also support organ repair. These capabilities could expand access to transplantation and contribute to better recipient outcomes, although these effects are potential benefits rather than guaranteed results.