There are multiple definitions:

1. door-to-balloon time(English)

   • also denoted as D2B or DtoB
   • DTN, CCLA
   • Cardiology, Emergency medicine
   • https://doi.org…390/jpm11111149

2. Drugs and Therapeutics Bulletin(English)

   • in UK
   • Medical publications, Pharmacology / pharmaceutics
   • https://dtb.bmj.com/