
6-2 Rad-8 Signal Extraction Pulse Oximeter Operator’s Manual
6
Troubleshooting continued
PROBLEM POSSIBLE CAUSE(S) RECOMMENDATION
SpO
2
VALUES DO NOT
CORRELATE WITH
CLINICAL ASSESSMENT
OR ABGs
Low perfusion or sensor
displacement.
Check for error messages. See section 5
Messages for recommended corrections.
Check placement of sensor or if it is too
tight. Reapply sensor or select a new site.
Set to MAX sensitivity and confirm that the
sensor is securely on the patient.
Refer to sensor Directions For Use.
PULSE SEARCH
MESSAGE OR “-
---”
Device is searching for
pulse.
If device fails to display within 30 seconds,
disconnect and reconnect sensor to
patient. If pulse search continues, move
sensor to better perfused site.
UNEXPECTED SpO
2
READING
Low SIQ or Perfusion
Index (PI) values.
Reposition sensor to site with strong SIQ
and PI. Submit blood sample for laboratory
oximetry test for comparison.
Inappropriate sensor size
or sensor measurement
location.
Verify proper sensor for patient size.
Verify proper sensor site.
DIFFICULTY OR NO SpO
2
READING
Low battery/not plugged
into AC power supply.
Connect the AC Power Cord to the Rad-8
and to an AC outlet. Make sure that the
AC Power Indicator light is on.
Inappropriate sensor or
sensor size.
Verify proper sensor and sensor size for
the patient.
Excessive ambient or
strobing light.
Shield the sensor from excessive or
strobing light.
Also, see Section 4, Successful Monitoring, for additional information.
PRINT FUNCTION DOES
NOT WORK
Wrong serial cable is used. Make sure a null modem cable is used.
troubleshooting
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