©2020 Baxter International Inc. C-1
Appendix C - Accessories: Specifications
& Technical Data
NIBP Module
Terminology
Oscillometry
The oscillometric method of blood pressure measurement is a non-invasive method that
monitors the amplitude of cuff pressure changes during cuff deflation to determine arterial
blood pressure. The cuff pressure is first elevated above the patient systolic blood pressure
level and the cuff begins to deflate at a certain rate. The initial rise in amplitude of these pressure
fluctuations during cuff deflation corresponds closely to the systolic blood pressure. As the
cuff is further deflated, these pressure fluctuations increase in amplitude until a peak is reached
which is usually referred to as the mean arterial pressure (MAP). As cuff deflation continues,
the diastolic pressure can be determined based upon the rapidly diminishing amplitude of the
pressure fluctuations. Thus systolic, MAP and diastolic blood pressures can be accurately
obtained by supervising the pressure fluctuations while controlling the cuff deflation rate.
mmHg
Millimeters of Mercury (mmHg) - this is the most-common unit of measurement for pressure
in non-invasive blood pressure.
bpm
Beats per minute (bpm) - this is the most-common unit of measure for pulse rate.
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