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2.1.6.2 Monitoring Module
Monitoring module monitors pressure and flow of anesthesia machine and breathing system,
controls valves, monitors and collects statuses, reads O2 concentration, monitors pressure and
flow in circuit, and control accuracy accurately. Monitoring module contains VCM and VPM.
VCM monitrs the parameters including inspiratory flow, expiratory flow, interior flow of the
machine, airway pressure, PEEP, O2 concentration, etc, and controls the actions of three-way
valve and exhalation valve (including safety valve, PEEP valve, and inspiration valve).
VPM monitors the signal of the pressure switch of drive gas, ACGO limit switch, O2 pressure
switch at gas source inlet, auto/manual switch, CO2 absorbent canister in-place switch, etc. VPM
also controls the selector valve of drive gas, and controls safety valve with VCM, and send
monitoring information to the main board through series port.
J1, power supply
port and VCM
communication port
J5,VPM
communication port
J7,
communication
port of
calibration
J10,CO2
Absorber
canister
switch signal
J4,
exhalation
valve drive
J8, on/off
signal
J15, control
selector valve
of drive gas
J2,
Exhalation
valve Power
supply
J12, O2
sensor port
J6, three-
way valve
drive
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