The systole is the highest number and the diastole is the lowest number. Systolic is also when the ventricles contract, and the diastole is when the ventricles release/relax. In our lab, the systole averaged about 116 and the diastole was 70. To measure heart rate, we just used our fingers, except we used a stethoscope to measure our heart beat. To measure blood pressure we used a stethoscope, pressure cuff, and the sphygmomanometer. Using your thumb to measure pressure is not ideal because your thumb has a blood pressure as well, so it would get confusing. To use a blood pressure cuff, you secure it on to the person who you are measuring, and then find their pulse. After, you start pumping air to tighten the cuff, you let the air release and watch the dial. One you start hearing their pulse again, that is their systolic number and when you stop hearing their pulse that is their diastolic number.
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