Survival Benefit‐Based Deceased‐Donor Liver Allocation

• Published in: American journal of transplantation Vol. 9; no. 4p2; pp. 970 - 981
• Main Authors: Schaubel, D. E., Guidinger, M. K., Biggins, S. W., Kalbfleisch, J. D., Pomfret, E. A., Sharma, P., Merion, R. M.
• Format: Journal Article
• Language: English
• Published: Malden, USA Blackwell Publishing Inc 01.04.2009
• Subjects: Albumin; bilirubin; creatinine; Follow-Up Studies; Humans; Life Expectancy; Liver Diseases - classification; Liver Diseases - mortality; Liver Diseases - surgery; Liver Transplantation - mortality; Liver Transplantation - statistics & numerical data; Model for End‐stage Liver Disease (MELD); organ allocation; Organ Procurement and Transplantation Network (OPTN); Reoperation - statistics & numerical data; Resource Allocation - statistics & numerical data; Scientific Registry of Transplant Recipients (SRTR); Survival Rate; Survivors; Tissue Donors - statistics & numerical data; Tissue Donors - supply & distribution; waiting list; Waiting Lists
• ISSN: 1600-6135; 1600-6143; 1600-6143
• DOI: 10.1111/j.1600-6143.2009.02571.x

Currently, patients awaiting deceased‐donor liver transplantation are prioritized by medical urgency. Specifically, wait‐listed chronic liver failure patients are sequenced in decreasing order of Model for End‐stage Liver Disease (MELD) score. To maximize lifetime gained through liver transplantation, posttransplant survival should be considered in prioritizing liver waiting list candidates. We evaluate a survival benefit based system for allocating deceased‐donor livers to chronic liver failure patients. Under the proposed system, at the time of offer, the transplant survival benefit score would be computed for each patient active on the waiting list. The proposed score is based on the difference in 5‐year mean lifetime (with vs. without a liver transplant) and accounts for patient and donor characteristics. The rank correlation between benefit score and MELD score is 0.67. There is great overlap in the distribution of benefit scores across MELD categories, since waiting list mortality is significantly affected by several factors. Simulation results indicate that over 2000 life‐years would be saved per year if benefit‐based allocation was implemented. The shortage of donor livers increases the need to maximize the life‐saving capacity of procured livers. Allocation of deceased‐donor livers to chronic liver failure patients would be improved by prioritizing patients by transplant survival benefit.