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Interference Explained
N-560 Operator's Manual
Description of Controls, Indicators, and Symbols
•
Loosen sensor (too tight)
•
Isolate external interference (electrosurgical device, cell phone)
•
Clean site (MAX-R)
The
Indicator. The indicator blinks for approximately one
Data In Sensor
minute when initially connected to the N-560 to indicate that the attached
O
M
sensor contains a patient sensor event record. The indicator lights
XI
AX
continuously to indicate that the attached sensor memory is full. The
indicator does not light when there is no data in the sensor, even though a
valid sensor is connected to the N-560.
The SatSeconds
TM
Indicator. Fills in clockwise as the SatSeconds alarm
management approaches the SatSeconds alarm limit threshold. All
segments of the SatSeconds indicator flash during a SatSeconds alarm.
When a SatSeconds setting other than OFF is selected, the green LED at
the top of the SatSeconds indicator will light. The green LED at the
12-o'clock position indicates that SatSeconds alarm management is
engaged.
Interference is a term that was formally introduced in
ISO9919:2005, "Medical electrical equipment — Particular
requirements for the basic safety and essential performance of pulse
oximeter equipment for medical use". Interference may arise from a
number of sources, alone or in combination, and the term refers to
the effects on the incoming red and IR signals caused by
physiological conditions, medical procedures, or external agents.
The effect of interference on a pulse oximeter is due only to the
amount of interference, and is generally nondiscriminatory as to its
source. Interference may or may not affect the accuracy of
measurements, depending upon its severity, nature, or duration.
Factors which may result in interference include but are not limited
to:
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