Product Manual

10-16 CARESCAPE V100 Vital Signs Monitor 2036991-001C
Masimo SET SpO2: Troubleshooting
PROBLEM: The oxygen saturation measurement does not correlate with the
value calculated from a blood gas determination.
CAUSE:
 The SpO
2
calculation may not have correctly adjusted for the effects of
pH; temperature; CO
2
; fetal hemoglobin; or 2,3-DPG.
 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 8 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: A valid SpO
2
signal was present but has disappeared.
CAUSE:
 An NIBP determination on the same limb is in progress.
SOLUTION:
Check the patient.
 An alarm message code appears on the screen, and the audible alarm
will sound immediately.
 Move the sensor to the arm that is not connected to a blood pressure cuff.