BT-740 Operation manual
81
P/N : 740-ENG-OPM-EUR-D03
Bistos Co., Ltd.
2018.05
11
NIBP
11.1 Overview
The monitor uses oscillometric method to measure noninvasive blood pressure (NIBP).
The oscillometric method for measuring blood pressure is to inflate a cuff with a certain
amount of pressure until the arterial blood flow has been completely blocked. As applied
pressure decreases, the arterial blood flow which was completely occluded gradually opened,
and completely opened. Then, the pulsation of the arterial vascular wall will generate a shock
wave in the cuff. SBP, MAP, and DBP are obtained by measuring and analyzing cuff pressure
oscillations when deflating.
Produce first most clear signal - reflect SBP
Oscillation amplitude reaches the peak - reflect MAP
When the cuff pressure is suddenly lowered - reflect DBP
Measuring mode: manual, cycle, and continuous. Each mode shows systolic, mean and
diastolic blood pressure.
Manual mode
Using Manual mode start to measures by hand
Automatic mode measures
Use manual mode to open automatic mode, then the measure will automatically turn to
automatic mode after a certain time. During measurement, any error will stop the current
automatic measurement, but not affect next automatic measurement unless the time
interval less than 30s. If the time interval less than 30s, should delay the next automatic
measurement, keep the interval more than 30s.
The time interval can be choose In Automatic mode as 1, 2, 3, 4, 5, 10, 15, 30, 60, 90, 120,
180, 240, 480 minutes.
Continuous mode
Choose continuous mode, 5 seconds after complete a measurement start the next
measurement, continue 5 minutes then stop. During measurement, any error will stop the
continuous measurement. If the first measurement time is over 4 minutes and 40 seconds
but less than 5 minutes, the continuous mode will stop before 5 minutes, if the first
measurement time is over 5 minutes, the continuous mode will stop after 5 minutes.
The monitor is defibrillation proof, so the monitor operates normally after defibrillation.
