Blood Pressure Monitors

I remember those time my first time to get the blood pressure of my uncle who was a bed ridden because of stroke. My cousin who is a graduate of nursing tought me to meassure the blood pressure of my uncle. He uses a mercury base instrument to meassure the blood pressure, then my auntie from USA, a nurse brought home a digital blood mesuring device I still remember the brand of that gadget its omron, its easy to use. Now we don't have one because no one in the house who use it anymore..