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Unable to obtain a
green pulse display on
the bargraph, cont’d.
The sensor is applied
incorrectly.
Apply the sensor correctly.
There is possible
interference from one of
the following sources:
• arterial catheter
• blood pressure cuff
• electrosurgical
procedure
• infusion line
Reduce or eliminate any
interference. Make sure that
the sensor is not placed on the
same arm being used for other
patient therapies or diagnostics
(e.g., blood pressure cuff).
The red LED is not
illuminated in the finger
insertion area.
Ensure that the sensor is
securely attached to the 4100.
Check the 4100’s batteries.
Check the sensor for any
visible signs of deterioration.
Contact your distributor or
NONIN Customer Support.
Frequent or steady
pulse quality
indication.
There is excessive
ambient light.
Shield the sensor from the
light source.
The sensor is applied to a
polished or artificial
fingernail.
Apply the sensor to a finger
without artificial or polished
nails.
Position the sensor at a
different site.
The red LED is not
illuminated in the finger
insertion area.
Ensure that the sensor is
securely attached to the 4100.
Check the sensor for any
visible signs of deterioration.
Contact your distributor or
NONIN Customer Support.
Patient motion is
excessive.
Reduce patient motion.
Problem
Possible Cause
Possible Solution
