There are multiple definitions:

1. breathing reserve(English)

   • ratio of VE/maximum voluntary ventilation
   • BMI, CO, EELV, HR, HRR, IC, LV, MCR, MVV, PAP, PCWP, PVR, RAP, RER, SaO2, OUES, VCO2, VD/VT, VE, VFL/VT, VO2, VT
   • Respiratory system, Ratio-based metric, Oxygen
   • https://doi.org….1002/ejhf.2601

2. blink reflex(English)

   • a physiological, protective trigeminofacial reflex aimed at facilitating eyelid closure as a response to a threatening and potentially harmful stimulus
   • nsBR, nBR
   • Ophthalmology, Physiology
   • https://doi.org…9752(10)97023-1

3. buckling ratio(English)

   • describes stable configurations of thin-walled tubes subjected to compressive loads and requires an estimate of the cortical thickness regarding narrow neck, intertrochanter and femoral shaft
   • AAM, AAM-BR, AAM-CT, AAM-W, BMD, BMI, DXA
   • Gynecology
   • https://doi.org…/ijerph13020157

4. brachoradialis(English)

   • refers to muscle shear elastic modulus during isometric elbow flexion with ramped torque
   • BA, BB, BR, EMG, LH, SH
   • Anatomy, Myocyte / muscle, Biophysics
   • https://doi.org…ech.2012.02.020

5. burn ratio(English)

   • a crucial parameter to ensure adequate treatment and therapy of associated wounds
   • TBSA
   • Wound healing/care, Ratio-based metric
   • https://doi.org…000000000000302
   • https://doi.org…edicina57030242

6. bendamustine plus rituximab(English)

   • CLL, EOT, MRD, OS, PFS, uMRD
   • Chemotherapy
   • https://doi.org…lood.2021015014

7. Biologics Register(English)

   • BILAG, SLE
   • Registry, Therapeutic approaches
   • https://doi.org…9913(23)00091-7

8. brief version(English)

   • may refer to any screening tool, e.g. the loneliness scale
   • MTL-BR, MTL, UCLALS-BR
   • Screening, Scoring systems/scales
   • https://doi.org…155-020-00157-6