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Philips M3001A Service Manual Page 52

M3/m4 monitors,measurement server,measurement server extensions.
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Arterial Oxygen Saturation and Pleth (SpO
SpO
SpO
2
CPU
The SpO
transducer coding information from the SpO
wave is transformed into the frequency domain. An adaptive signal analysis of the frequency
information eliminates artifact and noise from the patient signal that is then used to calculate
the SpO
The SpO
INOPs.
The wave is communicated to the Monitor (via the operating system), the SpO
rate are communicated to the average calculation software, and INOPs are communicated to
the alarming software.
• The Average Calculation software receives the SpO
algorithm, and calculates the average over the time interval configured by the user. This
value is communicated to the Monitor via the operating system, and to the Alarming
software.
• The SpO
software and compares it against the limits set by the user.
This software also gets INOP messages from the SpO
Alarms are communicated to the Monitor via the operating software.
• The SpO
information, the INOP and error messages and the status information from the SpO
It receives the operating controls and the user settings from the Monitor. The user settings
are stored in non-volatile memory.
36
/PLETH) Measurement
2
Algorithm Software on the System CPU
2
SpO
2
Algorithm
SpO
2
Control
Algorithm receives the demodulated and filtered red and infrared signals, and the
2
and Pulse numeric values.
2
algorithm also detects non-pulsatile or noisy signals, and generates the appropriate
2
Alarming software gets the average SpO
2
Controller software receives the red and infrared signals, the transducer coding
2
Pleth, Wave
Average
SpO
2
Calculation
Pulse Rate
SpO
SpO
2
2
Alarming
SpO
2
measurement frontend. The red and infra-red
2
value for each beat from the SpO
2
value from the average calculation
2
algorithm software.
2
Introduction to the Instrument
Value
Alarms
Controls
and pulse
2
CPU.
2
2

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