There are multiple definitions:

1. patient under investigation(English)

   • PPU
   • Personalized approach, Diagnostics
   • https://doi.org…2006.2024.00041

2. partial urethral injury(English)

   • occurs in 17% of patients with a pelvic ring fracture
   • CUD, LUTI, PRF
   • Injury, Urology
   • https://doi.org…0X.2007.07020.x

3. passive ultrasonic irrigation(English)

   • DAP, RET, SVN, XPF
   • Dentistry, Therapeutic approaches, Ultrasound
   • https://doi.org…405-023-00183-3