LEARNING vocabulary in textual or verbal CONTEXT is meaningful because the USAGE becomes clear and understood in the context itself. For Example, if wanting to build up vocabulary in Commerce, better to pick words from Commerce books/journals or Commerce websites etc!
former occurred due to full dose of intravenous Thiopentone to traumatic hypovolemic patients, latter is occurring due to high flow of inhaled Oxygen to COPD, chronic obstructive pulmonary disease, exacerbated by FLU (ILI, Influenza Like Illness called Covid-19) patients!
EXSANGUINATOR like Esmarch bandage or Rhys-Davies Exsanguinator is generally not required these days with the availability of electronic RAPID tourniquet cuff inflator with the set pressure for particular limb!