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

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Oximeter Features
Operator’s Manual
13
Oximeter Features
OxiMax SPD™ Alert Feature
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
The SPD feature qualifies these patterns of desaturation over a period of six (6)
minutes. Depending on the sensitivity setting for SPD, patterns that persist may
result in an SPD alarm, alerting the caregiver to the condition.
Figure 4. Clinically Significant Desaturation Patterns
Reference Oximeter Display View Options , page 17, Managing the View Display , page
33, Using the OxiMax SPD™ Alert Feature , page 54, and OxiMax SPD™ Alert Feature ,
page 118 for details.
SatSeconds™ Alarm Management Feature
The oximeter monitors the percentage of hemoglobin binding sites saturated with
oxygen in the blood. With traditional alarm management, upper and lower alarm