Oximetry Operating Modes - Nellcor N-200 Operator's Manual

Disabling the Audio Alarm
WARNING: In normal operation, the AUDIO ALARM
OFF button temporarily silences the alarm. Although
the audible alarm can be disabled as described, do NOT
disable it if patient safety could be compromised.
To disable the audio alarm, press and hold the AUDIO ALARM
OFF button, and turn the control knob clockwise until OFF
appears on the OXYGEN SATURATION display. The AUDIO
ALARM OFF indicator light flashes continuously while the
audio alarm is disabled. The audio alarm can be reactivated by
pressing the AUDIO ALARM OFF button again.
Note: When the operator turns the N-200 off and back on
again, the audio alarm is automatically reenabled and
the alarm silence period returns to the default of
60seconds.

Oximetry Operating Modes

The three operating modes of the N-200 enable it to make
accurate measurements despite differing levels of patient
activity. In all three modes, the N-200 updates its
measurements with every pulse beat. Data from the most
recent beat replaces data from the oldest beat, and new
averages are determined and displayed.
Mode 1, the default operating mode, uses a 5- to 7-second
averaging time and is useful in situations in which the patient
is relatively inactive. If the patient is unavoidably active, use
C-LOCK ECG synchronization. If this is not possible, use
Mode3.
Mode 2 uses a 2- to 3-second averaging time and therefore is
more affected by patient motion. It is useful for special
applications that require a fast response time, such as sleep
studies.
Mode 3 uses a 10- to 15-second averaging time and
consequently is least affected by patient motion. In this mode,
pulse rate is not displayed and there is no pulse tone.
Guide to Operation
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