Product Manual

2036991-001C CARESCAPE V100 Vital Signs Monitor 8-11
Ohmeda TruSignal SpO2: Troubleshooting
Troubleshooting
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; use the PIr pulsatile value
to determine the strength of the signal and 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.
SOLUTION:
Check the patient.
 If possible, keep the patient still; check whether the sensor is applied
securely and properly, and replace it if necessary; use the PIr pulsatile value
to determine the strength of the signal and move the sensor to a new site;
use a sensor that tolerates more motion.
If an ESU is interfering:
 Move the SpO
2
cable as far from the ESU as possible.
 Plug the monitor and the ESU into different AC circuits.
 Move the ESU ground pad as close to the surgical site as possible.
 The sensor may need to be replaced with a new sensor.