Background and objectives. The shortage of suitable donor organs remains a major limitation to lung transplantation. Extended criteria donors (ECDs) may expand the donor pool, although their impact on outcomes remains uncertain. This study compared ECD and standard donor transplantation outcomes, focusing on advanced donor age, individual extended criteria, and ex vivo lung perfusion. Materials and methods. This retrospective, observational, bicentric study included 866 lung transplantations performed between 2015 and 2024 at the University Hospital of Padua, Italy, and Hôpital Foch, France. Overall, 592 ECD transplantations were compared with 274 standard donor transplantations. Additional analyses examined donors aged ≥70 versus 55–69 years, five individual ECD criteria, and ex vivo lung perfusion (EVLP/OCS). Overall survival was the primary endpoint. Secondary endpoints included chronic lung allograft dysfunction (CLAD), postoperative complications, and recovery parameters. Survival and multivariable regression analyses were performed. Results. Five-year survival did not differ significantly between ECD and standard donor recipients (67.6% vs 68.7%; HR 1.08; 95% CI 0.84–1.38), including after multivariable adjustment. CLAD was more frequent in ECD recipients (28.2% vs 21.6%), but the association was no longer significant after adjustment for follow-up duration. Carefully selected donors aged ≥70 years were not associated with significantly worse survival than donors aged 55–69 years (HR 0.76; 95% CI 0.47–1.23). No individual ECD criterion was independently associated with mortality after correction for multiple comparisons, whereas donor age ≥55 years was associated with more early postoperative complications (OR 1.75; Holm-adjusted p = 0.017). Among ECD recipients, EVLP/OCS was associated with lower mortality (HR 0.61; 95% CI 0.43–0.87), although this finding was not confirmed in analyses restricted to donation after brain death. Conclusions. Carefully selected ECD lungs may expand organ availability without a statistically significant reduction in overall survival. Advanced donor age alone should not be considered an absolute contraindication, although early postoperative morbidity requires attention. Comprehensive graft assessment, appropriate donor–recipient matching, and selective EVLP/OCS use support individualized donor acceptance beyond the traditional standard-versus-marginal dichotomy.
Introduzione e obiettivi. La carenza di organi idonei rappresenta tuttora uno dei principali ostacoli al trapianto polmonare. Il ricorso a donatori a criteri estesi (Extended Criteria Donors, ECD) offre la possibilità di ampliare il numero di organi disponibili, ma il suo impatto sugli esiti post-trapianto rimane oggetto di discussione. Questo studio ha valutato i risultati clinici dei trapianti eseguiti con polmoni provenienti da ECD rispetto a quelli da donatori standard, approfondendo il ruolo dell’età avanzata, dei singoli criteri di marginalità e della perfusione polmonare ex vivo. Materiali e metodi. È stato condotto uno studio osservazionale retrospettivo bicentrico su 866 trapianti polmonari eseguiti tra il 2015 e il 2024 presso l’Azienda Ospedale Università di Padova e l’Hôpital Foch di Parigi. Sono stati confrontati 592 trapianti da ECD e 274 da donatori standard. Analisi dedicate hanno esaminato gli esiti dei trapianti da donatori di età ≥70 anni rispetto a quelli da donatori di 55–69 anni, il contributo dei cinque criteri ECD e l’associazione tra perfusione ex vivo (EVLP/OCS) ed esiti clinici. L’endpoint primario era la sopravvivenza globale; gli endpoint secondari comprendevano la disfunzione cronica dell’allotrapianto polmonare (CLAD), le complicanze postoperatorie e i principali indicatori del decorso clinico. Sono state condotte analisi di sopravvivenza e regressioni multivariate. Risultati. La sopravvivenza a cinque anni era sovrapponibile nei riceventi di polmoni da ECD e da donatori standard (67,6% vs 68,7%; HR 1,08; IC 95% 0,84–1,38), senza differenze statisticamente significative anche dopo aggiustamento multivariato. La CLAD è stata osservata più frequentemente nei riceventi ECD (28,2% vs 21,6%), ma l’associazione non si manteneva significativa dopo aggiustamento per la durata del follow-up. Nei donatori accuratamente selezionati, un’età ≥70 anni non si associava a una sopravvivenza significativamente inferiore rispetto alla fascia 55–69 anni (HR 0,76; IC 95% 0,47–1,23). Nessuno dei singoli criteri ECD mostrava un’associazione indipendente con la mortalità dopo correzione per confronti multipli; l’età ≥55 anni risultava invece associata a una maggiore frequenza di complicanze precoci (OR 1,75; p corretto = 0,017). Tra i trapianti da ECD, l’impiego di EVLP/OCS si associava a una minore mortalità (HR 0,61; IC 95% 0,43–0,87), ma tale associazione non era confermata nell’analisi limitata ai donatori dopo morte encefalica. Conclusioni. I risultati sostengono la possibilità di ampliare il pool di organi mediante l’utilizzo di ECD accuratamente selezionati, senza osservare una riduzione statisticamente significativa della sopravvivenza globale. L’età avanzata del donatore, considerata isolatamente, non dovrebbe costituire un criterio assoluto di esclusione, pur imponendo attenzione al rischio di complicanze precoci. Una valutazione complessiva delle caratteristiche del graft, un adeguato abbinamento tra donatore e ricevente e l’impiego mirato della perfusione ex vivo possono contribuire a una selezione più individualizzata, oltre la tradizionale distinzione tra donatori standard e marginali.
DONATORI A CRITERI ESTESI NEL TRAPIANTO POLMONARE: ANALISI RETROSPETTIVA DEGLI OUTCOME E DELL’EVOLUZIONE DEI CRITERI DI SELEZIONE DEL DONATORE IN ITALIA E FRANCIA
SILVESTRIN, STEFANO
2024/2025
Abstract
Background and objectives. The shortage of suitable donor organs remains a major limitation to lung transplantation. Extended criteria donors (ECDs) may expand the donor pool, although their impact on outcomes remains uncertain. This study compared ECD and standard donor transplantation outcomes, focusing on advanced donor age, individual extended criteria, and ex vivo lung perfusion. Materials and methods. This retrospective, observational, bicentric study included 866 lung transplantations performed between 2015 and 2024 at the University Hospital of Padua, Italy, and Hôpital Foch, France. Overall, 592 ECD transplantations were compared with 274 standard donor transplantations. Additional analyses examined donors aged ≥70 versus 55–69 years, five individual ECD criteria, and ex vivo lung perfusion (EVLP/OCS). Overall survival was the primary endpoint. Secondary endpoints included chronic lung allograft dysfunction (CLAD), postoperative complications, and recovery parameters. Survival and multivariable regression analyses were performed. Results. Five-year survival did not differ significantly between ECD and standard donor recipients (67.6% vs 68.7%; HR 1.08; 95% CI 0.84–1.38), including after multivariable adjustment. CLAD was more frequent in ECD recipients (28.2% vs 21.6%), but the association was no longer significant after adjustment for follow-up duration. Carefully selected donors aged ≥70 years were not associated with significantly worse survival than donors aged 55–69 years (HR 0.76; 95% CI 0.47–1.23). No individual ECD criterion was independently associated with mortality after correction for multiple comparisons, whereas donor age ≥55 years was associated with more early postoperative complications (OR 1.75; Holm-adjusted p = 0.017). Among ECD recipients, EVLP/OCS was associated with lower mortality (HR 0.61; 95% CI 0.43–0.87), although this finding was not confirmed in analyses restricted to donation after brain death. Conclusions. Carefully selected ECD lungs may expand organ availability without a statistically significant reduction in overall survival. Advanced donor age alone should not be considered an absolute contraindication, although early postoperative morbidity requires attention. Comprehensive graft assessment, appropriate donor–recipient matching, and selective EVLP/OCS use support individualized donor acceptance beyond the traditional standard-versus-marginal dichotomy.| File | Dimensione | Formato | |
|---|---|---|---|
|
Silvestrin_Stefano.pdf
Accesso riservato
Dimensione
5.41 MB
Formato
Adobe PDF
|
5.41 MB | Adobe PDF |
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/20.500.12608/119389