There are multiple definitions:

1. superior vena cava(English)

   • IVC, RSVH
   • Anatomy, Vessel properties
   • https://doi.org…-0760-7.00047-4

2. subclavion vein catheterization(English)

   • Vessel properties

3. slow vital capacity(English)

   • FEV1, FVC, RSP, RV, TLC
   • Respiratory system
   • https://doi.org…2890-020-1096-z

4. sanitation value chain(English)

   • CLTS, CLTSH, OD, ODF
   • Hygiene
   • https://doi.org…heh.2023.114160