Nellcor OXIMAX N-560, Service Manual

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Technical Discussion
N-560 Service Manual 107
Figure 46: Oxyhemoglobin Dissociation Curve
SatSeconds
Alarm Management
The N-560 utilizes Nellcor’s
SatSeconds
alarm management technique.
SatSeconds
is a function of the software within the N-560. With the
SatSeconds
technique, upper and lower alarm limits are set in the same way as
traditional alarm management. The clinician also sets a
SatSeconds
limit that
allows monitoring of %SpO
2
below the selected lower alarm limit for a period
of time before an audible alarm sounds. Refer to the N-560 Operator's manual
for managing
SatSeconds
.
Signal Processing
The N-560 takes advantage of increased microprocessing power with
advanced mathematical algorithms.
O
XI
M
AX
advanced signal processing
allows the N-560 to provide accurate saturation and pulse rate values, even
during difficult monitoring conditions of low perfusion and signal
interference.
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