There are multiple definitions:

1. handheld ultrasound device(English)

   • e.g. for automated calculation of left ventricular ejection fraction
   • EF, AI
   • Ultrasound, Cardiology, Artificial intelligence
   • https://doi.org…bio.2020.12.003

2. Humanitarian Use Device(English)

   • FDA, ODA, OOPD, PDC
   • Therapeutic approaches, Medical technology (assessment)
   • https://doi.org…-319-67144-4_10