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Because mercury is 13.6 times denser than water it is able to measure higher pressures.
To measure blood at home, you have to have the right equipment. You need either an aneroid or digital monitor, which come with arm cuffs. It might be cheaper and easier to just visit the doctor's though.
a noninvasive procedure in which a set of inflatable cuffs (much like blood pressure cuffs) mechanically compress the blood vessels in the patient's lower limbs
There are specially designed blood pressure cuffs for children. The regular ones are too big for their arms.
Get it checked by someone with a blood pressure cuff. The home cuffs and the automatic machines in the drug store are sometimes unreliable.
Children do not have any need for routine monitoring of blood pressure at home, unless they have a severe medical condition. But yes, they do manufacture child size B/P cuffs.
The Omron Hem 650 is used for measuring one's blood pressure from the wrist as opposed to the normal method of measuring on the upper arm with standard blood pressure cuffs.
You can look for such product at different sites on the internet or you can go to clinics near your own town. You can also call your doctor and he/she can give you the information about this product.
Certified Nursing Assistants use technology everyday. They use things such as blood pressure cuffs, and heart rate monitors, among many others
cuffs
120/70 is the target Blood Pressure for most people, regardless of age or gender. Blood pressures vary significantly in children. If there is concern regarding blood pressure, it should be checked by a qualified health care professional who can ensure that the measurement was performed correctly and make the proper interpretation.
If you are refering to physical tools then it will depend on where you work. The most common are a stethoscope, scissors, a watch with a second hand and hemostats. Some nurses have their own blood pressure cuffs but again, that would depend on where you work as to whether or not you would need to purchase them.