Covidien Nellcor GR101704, Service Manual

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Theory of Operations
3-6 Service Manual
system displays the Pulse Timeout alarm and reports a zero saturation indicat-
ing a loss-of-pulse condition.
3.7
System Features
3.7.1
Nellcor™ Sensor Technology
Use Nellcor™ sensors, which are specifically designed for use with the moni-
toring system. Identify Nellcor™ sensors by the Nellcor™ logo on the plug. All
Nellcor™ sensors contain a memory chip carrying information about the
sensor which the monitoring system needs for correct operation, including the
sensor’s calibration data, model type, troubleshooting codes, and error detec-
tion data.
This unique oximetry architecture enables several new features. When a Nell-
cor™ sensor is connected to the monitoring system, the monitoring system
reads the information from the sensor memory chip, ensures it is error free,
and then loads the sensor data prior to monitoring for new information. As the
monitoring system reads sensor information, it sends the sensor model
number to the monitoring screen. This process may take a few seconds. The
sensor model number disappears after the monitoring system starts tracking
the patient’s SpO
2
and pulse rate.
Any monitoring system containing OxiMax technology uses calibration data
contained in the sensor in calculating the patient’s SpO
2
. With sensor calibra-
tion, the accuracy of many sensors is improved, since the calibration coeffi-
cients can be tailored to each sensor.
Contact Covidien or a local Covidien representative for a Nellcor™ Oxygen Sat-
uration Accuracy Specification Grid listing all of the sensors used with the mon-
itoring system. Covidien retains a soft copy at www.covidien.com.
The monitoring system uses the information in the sensor, tailoring messages
to better help the clinician troubleshoot client or data issues. The sensor auto-
matically identifies its sensor type to the monitoring system when attached.