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Published on: August 15, 2022
Graft ischemic time and outcome of lung transplantation: a multicenter analysis
Gabriel Thabut1, Hervé Mal, Jacques Cerrina
1Division of Pulmonary Medicine and Thoracic Surgery, Beaujon Hospital, Clichy, France. gabriel.thabut@bjn.ap-hop-paris.fr
Rationale:
The effect of graft ischemic time on early graft function and long-term survival of patients who underwent lung transplantation remains controversial. Consequently, graft ischemic time has not been incorporated in the decision-making process at the time of graft acceptance.
Objectives:
To investigate the relationship between graft ischemic time and (1) early graft function and (2) long-term survival after lung transplantation.
Measurements And Main Results:
The data from 752 patients who underwent single lung transplantation (n = 258), bilateral lung transplantation (n = 247), and heart-lung transplantation (n = 247) in seven French transplantation centers during a 12-year period were reviewed. Independent data quality control was done to ensure the quality of the collected variables. Mean graft ischemic time was 245.8 +/- 96.4 minutes (range 50-660). After adjustment on 11 potential confounders, graft ischemic time was associated with the recipient Pa(O2)/FI(O2) ratio recorded within the first 6 hours and with long-term survival in patients undergoing single or double lung transplantation but not in patients undergoing heart-lung transplantation. The relationship between graft ischemic time and survival appears to be of cubic form with a cutoff value of 330 minutes. These results were unaffected by the preservation fluid employed.
Conclusions:
The results of this large cohort of patients suggest a close relationship between graft ischemic time and both early gas exchange and long-term survival after single and double lung transplantation. Such relationship was not found in patients undergoing heart-lung transplantation. The expected graft ischemic time should be incorporated in the decision-making process at the time of graft acceptance.
