6-2 Radical-7 Signal Extraction Pulse CO-Oximeter Operator’s Manual Radical-7 Signal Extraction Pulse CO-Oximeter Operator’s Manual 6-3
PROBLEM POSSIBLE CAUSE(S) RECOMMENDATION
DIFFICULTY OR NO SpCO/
SpMet READING
Excessive motion.
Minimize or eliminate motion at the
monitoring site.
Inappropriate sensor or
sensor size.
Verify use of an SpCO/SpMet capa-
ble sensor. Verify proper sensor size
for the patient.
Excessive ambient or strob-
ing light.
Shield the sensor from excessive or
strobing light.
HANDHELD BATTERY
DOES NOT CHARGE
AC power cable may be
disconnected.
Restore power to the device.
PRINT FUNCTION DOES
NOT WORK
Wrong serial cable is used.
Make sure a null modem cable is
used.
LED LIGHTS ON LEFT
SIDE OF DOCKING STA-
TION CONTINUOUSLY
FLASH
Incompatable version of
software on Radical-7
handheld and docking
station.
Upgrade to current software versions.
Match handheld to docking station
with compatable software versions.
BATTERY RUN-TIME IS
SIGNIFICANTLY REDUCED
Battery Memory effects.
Use Battery Discharge function as
described in Section 4, Service.
6
troubleshooting
PROBLEM POSSIBLE CAUSE(S) RECOMMENDATION
LOW SIGNAL QUALITY
Improper sensor type or
application.
Excessive motion relative
to perfusion.
Sensor is damaged or not
functioning.
Check and see if blood flow to the
site is restricted.
Check the placement of the sensor.
Re-apply sensor or move to a differ-
ent site.
SpO
2
VALUES DO NOT
CORRELATE WITH CLINI-
CAL ASSESSMENT OR
ABGs.
Low perfusion or sensor
displacement.
Check for error messages. See sec-
tion 5 System Messages for recom-
mended 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
Unit is searching for pulse.
If unit fails to display within 30 sec-
onds, disconnect and reconnect. If
pulse search continues, move sensor
to better perfused site.
UNEXPECTEDLY HIGH
SpO
2
, SpCO OR SpMet
READING
Low SIQ or Perfusion Index
(PI) values.
Reposition sensor to site with strong
SIQ and PI. Average readings taken
from three different sites to improve
accuracy. Submit blood sample for
laboratory CO-Oximetry test for com-
parison.
Inappropriate sensor size
or sensor measurement
location.
Verify proper sensor for patient size.
Verify proper sensor site.
UNEXPECTEDLY HIGH
SpCO READING
Possible elevated methe-
moglobin level*.
Submit blood sample for laboratory
CO-Oximetry test.
DIFFICULTY OR NO SpO
2
/
SPCO/SPMET READING
Low battery/ not plugged
into AC power supply.
Insert handheld into docking station,
verify docking station power cord
plugged in and docking station power
indicator light is illuminated.
Interference from line-fre-
quency induced noise.
Verify/set 50/60hz menu setting. Refer
to Section 3, Initial Setup for details.
Inappropriate sensor or
sensor size.
Verify proper sensor and sensor size
for the patient.
Excessive ambient or strob-
ing light.
Shield the sensor from excessive or
strobing light.
Also, see Section 4, Successful Monitoring for additional informa-
tion.
* As with all CO-Oximeters, elevated methemoglobin levels may cause falsely elevated carboxyhe-
moglobin values.
troubleshooting
6
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