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Theory of Operation
Main Unit
NIBP Module
The figure below shows the NIBP module parameter board diagram.
FIGURE 1-10
The NIBP module parameter board
The
Passport V
calculates NIBP values using the oscillometric method of noninvasive blood
pressure measurement. These measurements correspond to comparisons with auscultatory
values, measured using the fifth Korotkoff sound within ANSI/AAMI SP10 standards for
accuracy.
CUFF
PRESSURE
SENSOR
PRESSURE
SENSOR
FOR
PROTECT
PRESSURE
SIGNAL
AMPLIFIER
CIRCUITS
PRESSURE
SIGNAL
AMPLIFIER
CIRCUITS
FOR
PROTECT
CPU
ASYCHRONOUS
SERIAL
COMMUNICATION
WATCHDOG
OVER
PRESSURE
PROTECT
CIRCUIT
A/D
CONVERTER
PRESSURE
SIGNAL
MOTOR CONTROL
FEEDBACK SIGNAL
PUMP AND
VALVE
CONTROL
CIRCUIT
FLASH
DRAM
MANIFOLD
VALVES
AND PUMP