New Analysis Finds Geographical Differences in Access to Donor Lungs, Transplants

Why It Matters

The findings highlight persistent inequities in organ allocation that could worsen outcomes for patients in underserved regions, prompting regulators to reassess the balance between efficiency and fairness in lung transplant policies.

Key Takeaways

• Western U.S. centers have ~30% lower effective donor lung availability
• New policy weighting proximity reduces donor access for all regions
• 23.9% of top‑10 candidates lose ranking after policy amendment
• Blood‑type O patients face greater de‑prioritization under new rules

Pulse Analysis

The United States’ lung allocation framework has evolved from a purely distance‑based system to the Composite Allocation Score, which blends medical urgency, projected survival, and compatibility. Proponents argued that incorporating efficiency metrics would shorten wait times and reduce organ transport costs. However, the shift also introduced a new variable—geographic proximity—that can tilt the balance toward patients located near donor hospitals, potentially sidelining those with the greatest clinical need.

The Cleveland Clinic‑Case Western analysis, using the Scientific Registry of Transplant Recipients, reveals that the West Census region lags behind the Midwest by about 30% in effective donor availability after accounting for distance weighting. When the recent amendment amplifies the proximity factor, the model predicts a universal dip in donor pools and a widening of regional disparities. Notably, 23.9% of candidates who ranked in the top ten under the original CAS fall out of that tier, and patients with blood type O—already limited by compatibility—experience the steepest de‑prioritization. These data suggest that the policy’s efficiency drive may unintentionally compromise equity.

For policymakers, the study underscores the need to calibrate allocation algorithms so that geographic efficiency does not eclipse medical urgency. Potential remedies include caps on proximity weighting, regional sharing agreements, or dynamic adjustments based on real‑time donor scarcity. As lung transplant demand continues to outpace supply, aligning allocation criteria with both outcome optimization and fairness will be critical to maintaining public trust and improving survival rates across all U.S. regions.