Liver and intestine transplantation

Area of Science:

• Hepatology
• Transplant Surgery
• Public Health Policy

Background:

• The implementation of the Model for End-Stage Liver Disease (MELD) and Pediatric End-Stage Liver Disease (PELD) allocation policy in March 2002 marked a significant shift in liver transplantation in the USA.
• This policy prioritized patients based on their risk of waiting list death rather than solely on waiting time.

Purpose of the Study:

• To evaluate the impact of the MELD/PELD-based allocation policy on liver transplant outcomes and waiting list dynamics.
• To analyze trends in adult living donor liver transplants and overall waiting list size.

Main Methods:

• Analysis of national liver transplant data following the implementation of the MELD/PELD policy.
• Comparison of pre- and post-transplant mortality rates, waiting list size, and donor type trends.

Main Results:

• The MELD/PELD policy led to decreased pretransplant mortality without increasing post-transplant mortality, despite higher illness severity at transplant.
• Adult living donor liver transplants decreased by over 30% in 2002.
• The overall liver transplant waiting list decreased by 6% in 2002, with a 12% net decrease in the active waiting list.
• Women constituted a higher percentage of living donor recipients (43%) compared to deceased donor recipients (34%).

Conclusions:

• The MELD/PELD allocation system effectively prioritized patients at high risk of waiting list death, improving overall outcomes.
• The decline in living donor transplants and potential shift towards less pre-emptive listing may reflect changes in transplant practices under the new policy.
• Intestine transplantation remains a high-risk, low-volume procedure with potential for future expansion.