Nellcor N-395 Operator's Manual page 74

The sensor inay be too tight, there may be excessive
ambient light, or the sensor may be on an extremity
with a blood pressure cuff, arterial catheter, or
intravascular line. Reposition sensor, as necessary.
@
Excessive environmental motion or electromagnetic
interference may be preventing the N-395 from
tracking the pulse. Remove the source of
interference or try to stabilize the environment, or
do both.
5. The Pulse Search Indicator lights after successful
measurements have been made.
Check the patient.
e
Perfusion inay be too low for the N-395 to track the
pulse. Test the instrumeilt on someone else.
Change the sensor site.
'
Try another type of sensor.
Prolonged patient motion may be preventing the
N-
395 from tracking the pulse. Verify that the sensor
is securely applied and replace it if necessary.
Change the sensor site. Use a type of sensor that
tolerates more patient movement; for example, an
adhesive sensor.
The sensor may be too tight, there may be excessive
ambient light, or the sensor may be on an extremity
with a blood pressure cuff, arterial catheter, or
intravascular line. Reposition sensor, as necessary.
Excessive environmental motion or electromagnetic
interference may be preventing the N-395 from
tracking the pulse. Remove the source of
interference or try to stabilize the environment, or
do both.
Other physiological conditions or medical procedures that inay
interfere with the monitor9 s measurements include dysfunctional
hemoglobin, arterial dyes, and dark pigment.