Is a wrist device advisable for self-measurement?

The newly developed wrist devices also measure blood pressure using an oscillometric method. They are fully automatic: they inflate the pressure cuff automatically and automatically release the pressure again at the correct rate. Some wrist devices have the pressure cuff incorporated in the device (Blood Pressure Watch). Wrist devices measure blood pressure fairly reliably if used correctly. However, the fully automatic finger devices, which measure blood pressure and pulse rate on the index finger, frequently give faulty readings. This occurs, for example, if the index finger is not held steady at the height of the heart or if the small terminal branches of the arteries (arterioles) are constricted due to cold fingers, as a result indicating too low a blood pressure.