Passport 12/Passport 8 Operator’s Manual 11-7
11.8 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.
11.9 Troubleshooting
This section lists the problems that might occur. If you encounter the problems when using the equipment or
accessories, check the table below before requesting for services. If the problem persists, contact your service personnel.
NOTE
Never try to disassemble the equipment or supplied accessories. There are no internal user-serviceable
parts.
Symptoms Possible Cause Correction Action
Dashes “- -” display in place of
numerics.
Measurement is invalid. Check that the sensor is properly applied. Change
the application site if necessary.
Do not see SpO
2
parameter
tiles in display.
Parameter not configured to display. Switch the SpO
2
monitoring function on as
described in section 3.12.1 Switching the
Parameters On/Off.
Unable to obtain SpO
2
reading Patient has poor perfusion Switch limbs/notify physician
Sensor not on patient
Check if the “SPO2 Sensor Off” alarm is reported.
If so, reapply the sensor.
If not, contact the service personnel.
Cables loose/not connected Check if the sensor and cable are properly
connected.
Ambient light
Check if the “SpO2 Too Much Light” alarm is
reported. If so, move the sensor to a place with
lower level of ambient light or cover the sensor to
minimize the ambient light.
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