
51
Using the Monitor
3. Plug the SpO
2
sensor into the SpO
2
sensor extension
cable. Then plug the SpO
2
sensor extension cable into the
SpO
2
sensor connector (18).
4. Proceed with monitoring. SpO
2
determinations run
continuously and can run simultaneously with other
measurements.
Troubleshooting the NELLCOR SpO
2
Parameter
This section discusses potential difficulties and suggestions
for resolving them. If the difficulty persists, contact a qualified
service person or your local representative.
The service manual, which is for use by qualified service
personnel provides additional troubleshooting information.
PROBLEM: The pulse amplitude bar indicates a pulse, but no
oxygen saturation or pulse rate values appear on the screen.
CAUSE:
• Excessive patient motion may be making it impossible
for the SpO
2
function to find a pulse pattern.
• The sensor may be damaged.
• The patient’s perfusion may be too low to allow the
SpO
2
function to measure saturation and pulse rate.
SOLUTION:
Check the patient.
• If possible, keep the patient still; check whether the
SpO
2
sensor is applied securely and properly, and
replace it if necessary; move the sensor to a new site; or
use a disposable adhesive sensor that may tolerate more
motion.
• Replace the sensor.
PROBLEM: The SpO
2
value or the pulse rate changes
rapidly; the pulse amplitude bar is erratic.
CAUSE:
• Excessive patient motion may be making it impossible
for the SpO
2
function to find a pulse pattern.
• An electrosurgical unit (ESU) may be interfering with
performance.
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