There are multiple definitions:

1. STarT Back Tool(English)

   • can estimate acute to chronic LBP transition, or whether early non-guideline concordant treatment is associated with the transition to chronic LBP
   • LBP, STarT
   • Spine (or spinal cord), Pain, Classification
   • https://doi.org…open.2020.37371

2. serum basal tryptase(English)

   • patients with mastocytosis have higher SBT levels but only rarely angioedema/urticaria associated with hypotension
   • MC
   • Allergy, Hypertension
   • https://doi.org…aci.2014.11.035

3. spontaneous breathing trial(English)

   • refers to evaluation of the right hemidiaphragm displacement
   • ICU, AECOPD, COPD, D-RSBI, NIF, RSBI
   • Respiratory system, Therapeutic approaches, Intensive care medicine
   • https://doi.org…06967-3.00013-2
   • https://doi.org…47/COPD.S161691