I am a doctor of Sanhe Medical Electronic Technology. For MDI, a drop of blood, MDI is just the abbreviation of the name of the person who invented a drop of blood. The hospital does not use one instrument to detect the condition, but will use many instruments to comprehensively detect it.

Most hospitals have a drop of blood.

Many clinics, pharmacies, health products stores, health stores, community surveys and so on are also in use.