GE Dash 2500 Operator's Manual page 194

13-16
MASIMO SET® SpO2: Troubleshooting
PROBLEM: The oxygen saturation measurement does not correlate with the
value calculated from a blood gas determination.
CAUSE:
The SpO calculation may not have correctly adjusted for the effects of
2
pH, temperature, pCO
Accuracy can be affected by incorrect sensor application or use,
intravascular dyes, bright light, excessive patient movement, venous
pulsations, electrosurgical interference, and placement of a sensor on
an extremity that has a blood pressure cuff, arterial catheter, or
intravascular line.
SOLUTION:
Check that calculations have been corrected appropriately for the
relevant variable. In general, calculated saturation values are not as
reliable as direct laboratory hemoximeter measurements.
If there is excessive light, cover the sensor with opaque material.
Circulation distal to the sensor site should be checked routinely. The site
must be inspected every 2 hours to ensure adhesion, skin integrity, and
correct optical alignment. If skin integrity changes, move the sensor to
another site.
Try to keep the patient still, or change the sensor site to one with less
motion.
Observe all instructions, warnings, and cautions in this manual and in
the directions for use of the sensor.
PROBLEM: An SpO signal quality alarm has occurred.
2
CAUSE:
Weak or "noisy" signal.
SOLUTION:
Check the patient.
If possible, keep the patient still; check whether the sensor is applied
securely and properly and replace it if necessary; move the sensor to a
new site; use a sensor that tolerates more motion.
If there is excessive light, cover the sensor with opaque material.
PROBLEM: The SpO signal has disappeared but the value persists, and an alarm
2
does not occur immediately.
CAUSE:
Probe may have become dislodged.
SOLUTION:
Check the patient.
If possible, keep the patient still; check whether the sensor is applied
securely and properly and replace it if necessary; move the sensor to a
new site; use a sensor that tolerates more motion.
Dash 2500 Patient Monitor
, fetal hemoglobin, or 2, 3-DPG.
2
2042480-001 C