Microlife BP3GU1-8X Instruction Manual page 10

1. Introduction
1.1. Your automatic blood pressure monitor
Your blood pressure monitor is a fully automatic digital blood pressure
measuring device for use by adults on the upper arm at home or in your
doctor's office. It enables very fast and reliable measurement of the
systolic and diastolic blood pressure as well as the pulse by way of the
oscillometric method. This device offers clinically proven accuracy and has
been designed to be user friendly.
Before using your blood pressure monitor, please read this instruction
manual carefully and then keep it in a safe place for future reference. If
you have additional questions regarding blood pressure measurements
please contact your doctor.
2. How is blood pressure measured?
2.1. What is blood pressure, and why does it fluctuate?
Your level of blood pressure is determined in the circulatory center of the
brain and adjusts to a variety of situations through feedback from the
nervous system. To adjust blood pressure, the strength and frequency of
the heart (pulse), as well as the width of circulatory blood vessels is altered.
Blood vessel width is affected by fine muscles in the blood vessel walls.
Your level of arterial blood pressure changes periodically during heart
activity. During the "blood ejection" (Systole), the value is highest (systolic
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