A small device called a glucose meter or glucometer measures how much sugar is in the blood sample. The drop of blood you get with a finger prick is often enough to use on a test strip. A finger prick can be done with a special needle (lancet) or with a spring-loaded device that quickly pricks the fingertip A wrist blood pressure monitor is a device you use on your own to measure your blood pressure (BP). Most monitors have a cuff that you wrap around your wrist. The cuff attaches to a digital display screen that shows your BP readings