Effect of unmanned aerial vehicle (drone) delivery on blood product delivery time and wastage in Rwanda: A retrospective cross-sectional study and time series analysis

Nisingizwe, M. P., et al. · 2022

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A retrospective measurement of a live blood operation in Rwanda, where delay turns into waste. It is filed so that, when parcel advertising borrows a medical number, the comparison remains an estimated driving time. Coauthors beyond the first are left as "et al." and were not reconstructed for this card.

The methods say they studied 20 facilities from 1 January 2015 to 31 December 2019. From 17 March 2017 to 31 December 2019, drones carried 12,733 blood-product orders, of which 5,517 (43 percent) were emergencies. Mean delivery time was 49.6 minutes (95 percent confidence interval 49.1 to 50.2). The abstract says this was 79 minutes faster than driving times estimated by the regional blood-transfusion centre, and 98 minutes faster than Google Maps estimates. After drone delivery began, expirations fell by 7.1 units a month (95 percent confidence interval −11.8 to −2.4), translated as a 67 percent reduction at twelve months.

It is not a randomized trial. The road difference is not a measured road trip of the same order at the same time. It is an estimated driving time. The authors themselves leave cost-effectiveness as the next question. Do not carry these twenty facilities and this period into another country's parcel network.