Doctors advised to beware the wrist BP measure

Readings from wrist devices differ widely from upper arm cuffs: Aussie research
Reuters Health
wrist BP device

Australian researchers have advised doctors to be wary of blood pressure measuring devices that take a reading at a patient’s wrists as they found a wide variation in readings. 

Many devices used by patients at home, including the increasingly available wearable monitors, measure blood pressure at the wrist and other locations.