Nellcor OxiMax N-550, Operator'S Manual, Page: 69 / 104

Performance Considerations
N-550 61
• ambient light
• prolonged patient movement
Loss - of - pulse signal can occur for the following reasons:
• the sensor is applied too tightly
• a blood pressure cuff is inflated on the same extremity as the
one with the sensor attached
• there is arterial occlusion proximal to the sensor
Use only Nellcor sensors and sensor cables.
WARNING: The use of accessories, sensors, and cables other
than those specified may result in increased emission and/or
decreased immunity and inaccurate readings of the N-595 pulse
oximeter.
Select an appropriate sensor, apply it as directed, and observe all
warnings and cautions presented in the directions for use
accompanying the sensor. Clean and remove any substances such as
nail polish from the application site. Periodically check to ensure that
the sensor remains properly positioned on the patient.
WARNING: Tissue damage can be caused by incorrect
application or inappropriate duration of use of an SpO
2
sensor.
Inspect the sensor site as directed in the sensor directions for use.
High ambient light sources such as surgical lights (especially those
with a xenon light source), bilirubin lamps, fluorescent lights,
infrared heating lamps, and direct sunlight can interfere with the
performance of an SpO
2
sensor. To prevent interference from ambient
light, ensure that the sensor is properly applied and cover the sensor
site with opaque material.
Caution:Failure to cover the sensor site with opaque material in
high ambient light conditions may result in inaccurate
measurements.