Which device measures blood glucose in the field?

• A. Stethoscope
• B. Glucometer
• C. Thermometer
• D. Sphygmomanometer

Answer: (B)

A glucometer is the device used to measure blood glucose in the field. It works by obtaining a small fingerstick blood sample and applying it to a test strip that the meter analyzes to provide a glucose reading, usually shown in mg/dL. This fast reading is essential in EMS to determine if altered mental status or seizures are due to hypoglycemia and to guide treatment with oral glucose or intravenous dextrose as appropriate. The other tools measure different things: a stethoscope checks heart and lung sounds, a thermometer reads body temperature, and a sphygmomanometer measures blood pressure.