Nellcor Oximax NPB-40, Руководство оператора

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Description of Controls, Indicators, and Symbols
NPB-40 17
The NPB-40 display includes a
Pulse Amplitude
blip
bar, functional icons, and current measured %SpO
2
and
pulse rate. A decimal point after the %SpO
2
or pulse rate
indicates that the respective limits have been changed
from the power on default values (Table 2 on page 35).
Decimal points after the %SpO
2
or pulse rate indicate
that the respective limits have been changed from the
power
- on default values.
There are various matrices within the O
XI
M
AX
algorithm.
Some of these are used to assess the severity of
conditions presented to the NPB-40 in SpO
2
and pulse
rate measurements on a patient. These individual
matrices or combinations of these matrices are used to
drive the icon indicators on the NPB-40 front panel.
The O
XI
M
AX
algorithm automatically extends the amount
of data required for measurements of SpO
2
and pulse rate
dependent on the measurement conditions. Throughout
normal measurement conditions the, averaging time is six
to seven seconds. Throughout challenging measurement
conditions that could be caused by low perfusion,
motion, external interference like ambient light, or a
combination of these, the
O
XI
M
AX
algorithm
automatically extends the amount of data required
beyond seven seconds. If the resulting dynamic
averaging time exceeds 20 seconds, the
Pulse Search
indicator is displayed and SpO
2
and Pulse Rate display is
continue to be updated every second. As these conditions
become even more challenging, the amount of data
required continues to extend. If the dynamic averaging
time reaches 40 seconds, the
Pulse Search
indicator
begins to flash, the SpO
2
and pulse rate displays flash
zeros to indicate a loss-of-pulse condition.