Covidien Nellcor OxiMax N-600x, Operator'S Manual

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Operating the Oximeter
54
Operator’s Manual
5. Use the ADJUST UP or ADJUST DOWN keys below the ALARM SILENCE key on the
oximeter panel to increase or decrease the selected limit parameter.
6. Repeat steps as necessary to complete the alarm limits setup.
7. Wait for the display to time-out to accept the changes or press the EXIT softkey to close
the display and return to the normal monitoring mode.
Using the OxiMax SPD™ Alert Feature
How the OxiMax SPD™ Alert Feature (SPD) Works
WARNING
Supplemental oxygen will attenuate patterns of desaturation. A patient’s respiratory
compromise can be proportionally more severe before patterns appear in the
saturation trend. Remain vigilant when monitoring a patient on supplemental oxygen.
WARNING
The SPD feature is for use with adults patients only. In Neonate Mode, the SPD feature
remains OFF.
Caution
Use of the SPD alarm feature does not change the need to set threshold limits appropriate to
the patient being monitored.
The OxiMax SPD™ Alert (SPD) feature detects patterns of desaturation in adults that
are indicative of repetitive reductions in airflow through a patient's upper airway into
the lungs. Relative reductions in a patient's minute ventilation over a period of time
may cause a progressive drop in alveolar partial pressure of oxygen, leading to
arterial desaturation. If these decreases in ventilation are repetitive, they generate
distinct patterns in the saturation trend. Patterns of repetitive desaturation often
develop gradually over time, increasing in severity. Detection of patterns indicates
that a patient might be suffering progressively severe decrements in airflow that
may increase in acuity if left untreated.
Patterns of desaturation are multiple, sequential occurrences of a desaturation
followed by a resaturation. The SPD feature qualifies patterns of desaturation
resulting from such repetitive reductions in airflow based on specific characteristics.
•
The severity of the desaturation event (the depth of the desaturation during the event)
and the extent of the following resaturation
•
The regularity of the desaturation events (how often the pattern repeats)
•
The slope of the desaturation/resaturation trends that form the events
Note:
Unrecognized repetitive reductions in airflow through the upper airway occur in some
clinically significant scenarios. Patients exhibiting sleep apnea symptoms were used in
studies to validate the SPD feature. The presence of repetitive reductions in airflow was
scored using a standard diagnostic polysomnogram. Study results indicate SPD is a sensitive
marker in detecting repetitive reductions in airflow.