Emergency blood delivery time and blood-unit expiration
VerifiedEstimated road delivery time and pre-drone monthly expirations→Mean drone delivery 49.6 minutes, 79 minutes faster than regional-center road estimates; expirations fell 7.1 units per month, a 67% reduction at 12 months
2017-03-17 through 2019-12-31 · 12,733 orders across 20 health facilities; 5,517 emergency orders
Delivery-time baseline used estimated driving times rather than randomized dispatch; interrupted time-series supports but does not fully isolate the expiration effect.
