10 Monitoring SpO2
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Connecting SpO2 Cables
Connect the sensor cable to the color-coded socket on the monitor. You can connect some Philips
sensors directly to the monitor. For other sensors, use the corresponding adapter cable.
CAUTION
Extension cables: Do not use more than one extension cable (M1941A). Do not use an extension
cable with Philips reusable sensors or adapter cables with part numbers ending in -L (indicates "long"
cable version).
Electrical Interference: Position the sensor cable and connector away from power cables, to avoid
electrical interference.
Humidity: For neonatal patients, make sure that all sensor connectors and adapter cable connectors
are outside the incubator. The humid atmosphere inside can cause inaccurate measurements.
Measuring SpO2
1 Select the correct patient category setting (adult/pediatric and neonatal), as this is used to optimize
the calculation of the SpO
2
and pulse numerics.
2 During measurement, ensure that the application site:
– has a pulsatile flow, ideally with a perfusion indicator value above 1.0.
– has not changed in its thickness (for example, due to edema), causing an improper fit of the
sensor.
WARNING
• If not specified otherwise in the SpO
2
sensor's instructions for use, the following applies:
– For fully conscious pediatric or adult patients, who have a normal function of perfusion and
sensory perception at the measurement site:
To ensure skin quality and correct optical alignment of the sensor, inspect the application site
when the measurement results are suspicious or when the patient complains about pressure at
the application site, but at least every 24 hours. Correct the sensor alignment if necessary.
Move the sensor to another site, if the skin quality changes.
– For all other patients:
Inspect the application site every two to three hours to ensure skin quality and correct optical
alignment. Correct the sensor alignment if necessary. If the skin quality changes, move the
sensor to another site.
Change the application site at least every four hours.
• Injected dyes such as methylene blue, or intravascular dyshemoglobins such as methemoglobin
and carboxyhemoglobin may lead to inaccurate measurements.
• Inaccurate measurements may result when the application site for the sensor is deeply pigmented
or deeply colored, for example, with nail polish, artificial nails, dye or pigmented cream.
• Interference can be caused by:
– High levels of ambient light (including IR warmers) or strobe lights or flashing lights (such as
fire alarm lamps). (Hint: cover application site with opaque material.)
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