1 Size-Tornadoes can vary widely in size. 2  A typical tornado in the United States is around 500 feet across, but some may be as narrow as just a few feet across or as large as a mile wide. 3  Wind Speed-The wind speed of a tornado can vary from 65 to 250 miles per hour.
It is always used in conjunction with a means to determine at what pressure blood flow is just starting, and at what pressure it is unimpeded. Manual sphygmomanometers are used in conjunction with a stethoscope. The word comes from the Greek ÏÏÏÎ³Î¼ÏÏ (sphygmos, pulse), plus the scientific term manometer (pressure meter).
How to measure blood pressure using a sphygmomamometer. -begin pumping the air-once the arm is compresses, slowly release the air-the first sound heardthrough the stethoscope is the systolic pressure-when the sound stops, that is the diastolic blood pressure.