blood pressure monitor
Device composed of an armlet and a pressure gauge; it is used to measure diastolic (heart dilatation) and systolic (heart contraction) pressure.
pressure gauge 
Device used to measure blood pressure.
pneumatic armlet 
Device that wraps around the arm and squeezes the humeral artery; blood pressure is measured when the air is let out of the armlet.
tube 
Flexible conduit linking the armlet to the pressure gauge.
digital display 
Liquid crystal display screen indicating blood pressure.
pressure control valve 
Valve used to expel air from the armlet to reduce pressure.
air-pressure pump 
Small pump used to blow up the armlet.