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Vital Signs Monitor User Manual
NOTE:
1
To prevent interference from ambient light, ensure that the sensor is properly applied,
and cover the sensor site with opaque material.
2
Adjacent SpO
measurements in the same patient). Be sure to cover the sensor with opaque
material to reduce cross-interference.
3
Move the sensor to a less active site, and keep the patient still, if possible.
4
For Nellcor SpO
required for measuring SpO
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 "SpO
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 "SpO
11.5 Assessing the Validity of a SpO
You can check the quality of the pleth wave and the stability of the SpO
the sensor functions properly and whether the SpO
indications simultaneously to assess the validity of a SpO
Generally, the quality of the SpO
the sensor. A wave of poor quality manifests a decline of the signal validity. On the other hand,
the stability of the SpO
readings caused by physiological factors, unstable SpO
receiving signals with interference. The problems mentioned above may be caused by patient
movement, wrong sensor placement or sensor malfunction. To obtain valid SpO
limit patient movement, check the placement of the sensor, measure another site or replace the
sensor.
NOTE:
1
The SpO
accuracy has been validated in controlled human studies against arterial
2
blood sample reference measured with a CO-oximeter. SpO
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 are composed of healthy men and women from
age 19 to 37 (for EDAN SpO
various skin pigmentations. Note that the study population was healthy adults and not
in the actual intended use population.
sensors may interfere with each other (eg, multiple SpO
2
module, the algorithm automatically extends the amount of data
2
and PR depending on the measurement conditions.
2
Search Pulse" and SpO
2
No Pulse" indicating a loss-of-pulse condition.
2
pleth wave reflects the quality of the light signals obtained by
2
values also reflects the signal quality. Different from varying SpO
2
module), from 18 to 50 (for Nellcor SpO
2
and PR will continue to be updated
2
Reading
2
readings are valid. Always use these two
2
reading.
2
readings are resulted from the sensor's
2
- 74 -
Monitoring SpO
values to assess whether
2
readings, try to
2
measurements are
2
module), with
2
2
2
2
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