Background: The introduction of TA-NRP for combined heart and lung procurement in controlled donation after circulatory death (cDCD) in recent years has emerged as a promising strategy. However, cDCD lungs retrieved, after warm ischemia and a prolonged TA-NRP period, may be exposed to potential detrimental ischemia reperfusion injury. The purpose of this study is to to evaluate ischemia-reperfusion injury in TA-NRP cDCD lungs compared to lungs from donation after brain death (DBD) donors and to correlate these findings with clinical outcomes. Methods: Data from all lung transplants performed between June 2023 and November 2025 from cDCD donors with heart and lung procurement via TA-NRP were analyzed. Lung transplants from DBD donors during the same period served as the control group. Clinical data and morphological variables from lung samples collected before and after organ reperfusion were evaluated. Results: The study involved 99 lung transplants: 11 from cDCD donors with heart and lung procurement via TA-NRP, and 88 from DBD donors. The donor groups showed comparable baseline characteristics, with the exception of the ventilation time in the intensive care unit, which was significantly longer in the cDCD group (405 vs 72 hours; p<0.001). Morphological evaluation revealed an higher ischemia/reperfusion injury in the cDCD group only for the congestion parameter, both in the pre- (p=0.028) and post-reperfusion samples (p=0.063). The incidence of PGD3 at 0 hours was higher in the cDCD group (45% vs 17%; p=0.05), while no significant differences were observed at 24, 48, and 72 hours. Other peri operative variables, such as surgical implantation time, ICU lenght of stay, length of hospitalization, and in-hospital mortality, as well as post-operative variables, including the 12 months rejection index, airway complications during follow-up, and the onset of CLAD, showed no significant differences between the groups. Conclusions: Lungs from cDCD donors are exposed to warm ischemia, prolonged TA-NRP and longer pre-donation ventilation times compared to those from DBD. Although a potential increase in ischemia/reperfusion injury was observed in the cDCD group, key clinical outcomes were comparable to those of DBD lungs. These preliminary findings support the use of TA-NRP-cDCD donors to safely expand the lung donor pool. Larger case series are needed to confirm these results.
Presupposti dello studio: La recente introduzione della procedura TA-NRP per il prelievo combinato di cuore e polmoni nella donazione controllata a cuore fermo (cDCD) si è affermata come una strategia promettente. Tuttavia, i polmoni prelevati da donatori cDCD, dopo il periodo d’ischemia calda e il periodo prolungato di TA-NRP, potrebbero essere esposti a un potenziale danno da ischemia-riperfusione. L’obiettivo di questo studio è quello di valutare il danno da ischemia-riperfusione nei polmoni prelevati da donatori cDCD mediante procedura di TA-NRP, rispetto ai polmoni provenienti da donatori dopo morte cerebrale (DBD), e di correlare questi risultati con gli esiti clinici. Materiali e metodi: Sono stati analizzati i dati di tutti i trapianti di polmone eseguiti tra Giugno 2023 e Novembre 2025 da donatori cDCD con prelievo concomitante di cuore e polmone mediante procedura di TA-NRP. I trapianti di polmone da donatori DBD durante lo stesso periodo sono serviti da gruppo di controllo. Sono stati valutati i dati clinici e le variabili morfologiche da campioni di tessuto polmonare prelevati prima e dopo la riperfusione dell'organo. Risultati: Lo studio ha coinvolto 99 trapianti di polmone: 11 da donatori cDCD con prelievo concomitante di cuore e polmone mediante procedura di TA-NRP prolungata, e 88 da donatori DBD. I gruppi di donatori presentavano caratteristiche basali sovrapponibili, ad eccezione del tempo di ventilazione in terapia intensiva, che è risultato significativamente più lungo nel gruppo cDCD (405 vs 72 ore; p<0.001). La valutazione morfologica ha evidenziato un danno da ischemia/riperfusione maggiore nel gruppo cDCD solo per il parametro congestione, sia nei campioni pre- (p=0.028) che post- riperfusione (p=0.063). L'incidenza di PGD3 a 0 ore è risultata più elevata nel gruppo cDCD (45% vs 17%; p=0.05), mentre non sono state osservate differenze significative a 24, 48 e 72 ore. Ulteriori variabili peri operatorie, come il tempo chirurgico d’impianto, la durata della degenza in terapia intensiva, la durata d'ospedalizzazione, la mortalità intraospedaliera, e post operatorie, quali indice di rigetto a 12 mesi, complicanze delle vie aeree durante il follow-up, e insorgenza di CLAD, non hanno mostrato differenze significative tra i gruppi. Conclusioni: I polmoni da donatori cDCD sono esposti a ischemia calda, TA-NRP prolungato e tempi di ventilazione più lunghi rispetto a quelli DBD. Sebbene nel gruppo cDCD sia stato osservato un potenziale aumento del danno da ischemia/riperfusione, i principali outcomes sono risultati equiparabili a quelli dei polmoni DBD. Questi risultati preliminari depongono a favore dell'impiego di donatori cDCD sottoposti a tecnica TA-NRP per ampliare in sicurezza il bacino di donatori di polmoni. Si rendono necessarie casistiche più estese per confermare tali riscontri.
Valutazione clinica e morfologica dei polmoni da donatore DCD versus donatore DBD: influenza della tecnica TA-NRP sulla disfunzione primaria del trapianto (PGD)
BERTO, CAMILLA
2025/2026
Abstract
Background: The introduction of TA-NRP for combined heart and lung procurement in controlled donation after circulatory death (cDCD) in recent years has emerged as a promising strategy. However, cDCD lungs retrieved, after warm ischemia and a prolonged TA-NRP period, may be exposed to potential detrimental ischemia reperfusion injury. The purpose of this study is to to evaluate ischemia-reperfusion injury in TA-NRP cDCD lungs compared to lungs from donation after brain death (DBD) donors and to correlate these findings with clinical outcomes. Methods: Data from all lung transplants performed between June 2023 and November 2025 from cDCD donors with heart and lung procurement via TA-NRP were analyzed. Lung transplants from DBD donors during the same period served as the control group. Clinical data and morphological variables from lung samples collected before and after organ reperfusion were evaluated. Results: The study involved 99 lung transplants: 11 from cDCD donors with heart and lung procurement via TA-NRP, and 88 from DBD donors. The donor groups showed comparable baseline characteristics, with the exception of the ventilation time in the intensive care unit, which was significantly longer in the cDCD group (405 vs 72 hours; p<0.001). Morphological evaluation revealed an higher ischemia/reperfusion injury in the cDCD group only for the congestion parameter, both in the pre- (p=0.028) and post-reperfusion samples (p=0.063). The incidence of PGD3 at 0 hours was higher in the cDCD group (45% vs 17%; p=0.05), while no significant differences were observed at 24, 48, and 72 hours. Other peri operative variables, such as surgical implantation time, ICU lenght of stay, length of hospitalization, and in-hospital mortality, as well as post-operative variables, including the 12 months rejection index, airway complications during follow-up, and the onset of CLAD, showed no significant differences between the groups. Conclusions: Lungs from cDCD donors are exposed to warm ischemia, prolonged TA-NRP and longer pre-donation ventilation times compared to those from DBD. Although a potential increase in ischemia/reperfusion injury was observed in the cDCD group, key clinical outcomes were comparable to those of DBD lungs. These preliminary findings support the use of TA-NRP-cDCD donors to safely expand the lung donor pool. Larger case series are needed to confirm these results.| File | Dimensione | Formato | |
|---|---|---|---|
|
Berto_Camilla.pdf
accesso aperto
Dimensione
2.13 MB
Formato
Adobe PDF
|
2.13 MB | Adobe PDF | Visualizza/Apri |
The text of this website © Università degli studi di Padova. Full Text are published under a non-exclusive license. Metadata are under a CC0 License
https://hdl.handle.net/20.500.12608/109101