EDAN M3 User Manual

M3 Vital Signs Monitor User Manual SpO
2
Monitoring (Optional)
- 55 -
3 Move the sensor to a less active site, and keep the patient still, if possible.
4 For Nellcor SpO
2
module, the algorithm automatically extends the amount of data
required for measuring SpO
2
and PR depending on the measurement conditions.
During normal measurement conditions the averaging time is 6 to 7 seconds. During
conditions such as those caused by low perfusion, interference (e.g., external
interference such as ambient light or patient movement), or a combination of these,
the algorithm automatically extends the amount of data required beyond 7 seconds. If
the resulting dynamic averaging time exceeds 20 seconds, the screen will display
prompt message “Search Pulse” and SpO
2
and PR will continue to be updated every
second. As these conditions extend, the amount of data required continues to
increase. If the dynamic averaging time reaches 40 seconds, the screen will display
high-level alarm message “No Pulse” indicating a loss-of-pulse condition.
8.5 Assessing the Validity of a SpO
2
Reading
You can check the quality of the pleth wave and the stability of the SpO
2
values to assess whether
the sensor functions properly and whether the SpO
2
readings are valid. Always use these two
indications simultaneously to assess the validity of a SpO
2
reading.
Generally, the quality of the SpO
2
pleth wave reflects the quality of the light signals obtained by the
sensor. A wave of poor quality manifests a decline of the signal validity. On the other hand, the
stability of the SpO
2
values also reflects the signal quality. Different from varying SpO
2
readings
caused by physiological factors, unstable SpO
2
readings are resulted from the sensor’s receiving
signals with interference. The problems mentioned above may be caused by patient movement,
wrong sensor placement or sensor malfunction. To obtain valid SpO
2
readings, try to limit patient
movement, check the placement of the sensor, measure another site or replace the sensor.
NOTE:
1 The SpO
2
accuracy has been validated in controlled human studies against arterial
blood sample reference measured with a CO-oximeter. SpO
2
measurements are
statistically distributed, only about two-thirds of the measurements can be expected
to fall within the specified accuracy compared to CO-oximeter measurements. The
volunteer population in the studies composed of healthy men and women from age
19 to 37(for EDAN SpO
2
module), from 18 to 50 (for Nellcor SpO
2
module), with
various skin pigmentations. Note that the study population was healthy adults and not
in the actual intended use population.
2 The pulse rate accuracy is obtained by comparison to the pulse rate generated with
an arterial oxygen simulator (also an electronic pulse simulator).
3 During monitoring, if the monitor's reading differs significantly from the patient's
physiological condition, it indicates that the signal may be disturbed, resulting in an
inaccurate reading. In this case, the artifact can disguise as a similar reading,
causing the monitor to fail to send an alarm. In order to ensure reliable monitoring, it
is necessary to regularly check whether the sensor is wearing properly and the signal
quality is good.

EDAN M3 Specifications

General

Brand	EDAN
Model	M3
Category	Monitor
Language	English