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8.8 Nellcor Information
■ Nellcor Patents
This device may be covered by one or more of the following US patents and foreign
equivalents: 5,485,847, 5,676,141, 5,743,263, 6,035,223, 6,226,539, 6,411,833, 6,463,310,
6,591,123, 6,708,049, 7,016,715, 7,039,538, 7,120,479, 7,120,480, 7,142,142, 7,162,288,
7,190,985, 7,194,293, 7,209,774, 7,212,847, 7,400,919.
■ No Implied License
Possession or purchase of this device does not convey any express or implied license to
use the device with unauthorized replacement parts which would, alone, or in
combination with this device, fall within the scope of one or more of the patents relating
to this device.
Problem Solution
Do not see SpO
2
numeric area or
waveform area on
the main screen
Check that the SpO
2
is set to display in the Edit Workflow menu.
For more information, see 3.9.2.2 Setting the Screen Layout.
Dashes “- -” display in
place of numerics.
1. Check that the cable connections of SpO
2
sensor and the
extension cable are tight. Replace the SpO
2
sensor or the
extension cable if needed.
2. Reconnect the SpO
2
sensor if the alarm SpO2 Sensor Off
appears.
3. Check the PI value. If the PI value is too low, adjust the SpO
2
sensor, or apply the sensor to the site with better perfusion.
4. Move the sensor to the place with weaker light, or cover the
sensor with shade cloth if the alarm SpO2 Sensor Off
appears.
Low amplitude SpO
2
signal
1. The SpO
2
sensor and NIBP cuff are placed on the same limb.
Change a monitoring site if necessary.
2. Check the PI value. If the PI value is too low. Adjust the SpO
2
sensor, or apply the sensor to the site with better perfusion.
3. Check the sensor and its application site.
SpO
2
value is
inaccurate
1. Check the patient’s vital signs.
2. Check for conditions that may cause inaccurate SpO
2
readings.
For more information, see 8.3 SpO
2
Measurement Limitations.
3. Check the monitor, the SpO
2
sensor for proper functioning.
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