OPTN/UNOS Board-approved allocation policies rely on specific mathematical formulas unique to particular organs. These calculators, which use the same formula as the UNetSM computer system, help create a numerical scale for candidates on the waiting list and those scales are used in the allocation process.
For ages 12 and older
The Model for End-Stage Liver Disease (MELD) calculator provides a ‘score’ (number) based on how urgently someone needs a liver transplant in the next three months.
For ages 11 and under The Pediatric End-Stage Liver Disease (PELD) scoring system is similar to MELD, but uses some different factors to recognize the specific needs of children.
An Estimated Post Transplant Survival (EPTS) calculator scores all adult candidates on the kidney waiting list, as part of the new kidney allocation system.
The Kidney Donor Profile Index (KDPI) calculator summarizes the risk of graft failure after kidney transplant.