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Pulse Search indicator
appears after successful
measurements have
been made.
sensor LEDs or photodetector
may be affecting performance.
5. Patient motion may be
interfering with the instrument's
ability to find a pulse pattern.
6. Environmental motion may
be interfering with the
instrument's ability to track a
pulse.
7. The sensor may be too tight,
there may be excessive
illumination (for example, a
surgical or bilirubin lamp or
direct sunlight), or the sensor
may be placed on an extremity
with a blood pressure cuff,
arterial catheter, or intravascular
line; Mallinckrodt does not
recommend using a sensor on
the same limb as these three
devices.
8. The DB-9 sensor connector
on the N-20PA may be broken.
1. Patient perfusion may be
too low.
2. Patient motion may be
interfering with the
instrument's ability to find a
pulse pattern.
3. Environmental motion
may be interfering with the
instrument's ability to track a
pulse.
4. The sensor may be too
tight, there may be excessive
illumination (for example, a
surgical or bilirubin lamp or
direct sunlight), or the sensor
may be placed on an
extremity with a blood
pressure cuff, arterial
catheter, or intravascular
line; do not use the sensor on
the same limb as these three
devices.
Troubleshooting
that nothing blocks the sensor
site.
5-7. If possible, ask the patient
to remain still. Verify that the
sensor is securely applied and
replace it if necessary, move it
to a new site, or use a sensor
that tolerates patient movement,
such as an appropriate adhesive
sensor.
8. Replace the DB-9 connector.
1. Check patient status. Test
the instrument on someone
else, or try another type of
sensor. The N-20PA will not
make a measurement if
perfusion is inadequate.
2-4.If possible, ask the
patient to remain still.
Verify that the sensor is
securely applied and replace
it if necessary, move it to a
new site, or use a sensor that
tolerates patient movement,
such as an appropriate
adhesive.
4-3
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