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How the 1140 Works
Your model 1140 uses the oscillometric method to
detect your blood pressure. Before the cuff starts
inflating, the device will establish a baseline cuff
pressure, which is equivalent to the air pressure. The
measurement of your blood pressure is based on
this baseline pressure. After the cuff inflates to
block your blood in the artery, the deflation process
starts. During the deflation of the wrist cuff, your
1140 is detecting the pressure oscillations
generated by the beat-to-beat pulsatile. Any muscle
movement during this period of time will cause
measurement error. After detecting the amplitude
and the slope of the pressure oscillations during the
deflation process, your 1140 will determine the
systolic and diastolic pressures for you, and your
pulse rate is detected at the same time.