19
Radical Signal Extraction Pulse Oximeter Operator’s Manual 9
2
system description
Pulse
Waveform
Display
Time and Date
Indicator
Backlight/
Contrast
Button
Alarm Silence
Button
Output Mode
Indicator
Power/Standby
Button
Perfusion Index
Pulse Rate
Alarm Limits
Display
Pulse Rate
Measurement
Display
The Pulse Waveform Display shows the acquired plethysmograph waveform.
The pleth waveform is scaled with signal strength. Signal strength is defined as
the relation of arterial pulsatile signal to the non-pulsatile signal component.
The Pulse Waveform Display is updated with a frequency of 31.25 times per
second.
The Time and Date Indicator displays the current time and date. The date and
time is displayed in dd/mm/yyyy or mm/dd/yyyy format. Select the date and
time display format in the Clock menu.
Press the Backlight Button to change the illumination level of the backlight.
With the AC line power connected, four levels of illumination are available (in
addition to the no illumination level). In the Handheld mode, three levels of
illumination are available (again in addition to the no illumination level). Use
the lowest illumination for most efficient battery usage. The backlight Button is
also used to change the contrast of the LCD display. Press and hold the
Backlight Button for longer than two seconds to change the contrast. Release
the Backlight Button at the desired contrast setting.
Press the Alarm Silence Button to temporarily silence patient alarms. Press the
Alarm Silence Button when the SENSOR OFF or NO SENSOR messages are
flashing (i.e. the sensor is removed from the patient) to acknowledge the end of
monitoring. In these states, all further alarms are suspended until the pulse
oximeter starts measuring SpO
2
and pulse rate again.
Note: System failure alarms can be silenced by pressing the Power/Standby
or Alarm Silence Button. If the Power/Standby button does not silence the
system fault alarm, press the alarm silence button.
The Output Mode Indicator displays the output mode selected by the user.
The Output Mode Indicator also displays the type of SatShare
TM
cable. The
Output Mode indicator is only displayed when the Radical device actively
outputs data other than ASCII text, or interfaces with a monitor through the
SatShare cable.
Press the Power/Standby Button to turn the instrument on. Press, hold the
button for more than 2 seconds and then release the button to turn the
instrument off.
The Perfusion Index indicates numerically the percentage of pulsatile signal to
non-pulsatile signal.
The Pulse Rate Alarm Limits Display shows the upper and lower pulse rate
alarm limits. When an alarm limit is reached or exceeded, the pulse rate value
and the violated limit flashes.
The Pulse Rate Measurement Display shows the patient’s pulse rate in beats
per minute. The upper and lower pulse rate alarm limits are also displayed
next to the pulse rate measurement. The pulse rate is calculated and the
display is updated at a frequency of once per second.
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PI
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