Справочник Пользователя для Innokas Yhtyma Oy VC150
9-20
VC150 Vital Signs Monitor
KO00065K
Nellcor SpO
2
: Nellcor SpO
2
and special features
Clinically Significant Desaturation Patterns
The OxiMax SPD™ Alert (SPD) parameter 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.
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.
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™ parameter qualifies patterns of
desaturation resulting from such repetitive reductions in airflow based on
specific characteristics.
followed by a resaturation. The SPD™ parameter qualifies patterns of
desaturation resulting from such repetitive reductions in airflow based on
specific characteristics.
The SPD™ parameter 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.
(6) minutes. Depending on the sensitivity setting for SPD, patterns that persist
may result in an SPD alarm, alerting the caregiver to the condition.
•
The severity of the desaturation event (the depth of the desaturation during
the event) and the extent of the following resaturation
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™ parameter communicates information to the caregiver about these
patterns of desaturation in a variety of ways with icons and alarms.
patterns of desaturation in a variety of ways with icons and alarms.
When the indicator reaches capacity, indicating the SPD™ limit has been
reached, an audible alarm sounds and an alarm message flashes. The default
setting of one (1) is the most sensitive to desaturation patterns and results in
more frequent alarms. For less frequent alarms, use a less sensitive setting of
two (2) or three (3).
reached, an audible alarm sounds and an alarm message flashes. The default
setting of one (1) is the most sensitive to desaturation patterns and results in
more frequent alarms. For less frequent alarms, use a less sensitive setting of
two (2) or three (3).
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™ Alert
parameter. 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.
occur in some clinically significant scenarios. Patients exhibiting sleep
apnea symptoms were used in studies to validate the SPD™ Alert
parameter. 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.