Weinmann MEDUMAT Standard2 Instructions For Use Manual page 247

Specification
Maximum drift of measuring accuracy
Start-up time of the CO
Response time of the complete system
• 2 m hose systems
• 3m hose systems
Data sampling rate
Service life of the water filter
module
2
Functioning of CO
CO monitoring is performed using the side-stream method by
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removing a small amount of gas (80 ml/min) close to the patient
connection of the hose system. The measurement principle is
based on nondispersive infrared technology (NDIR). The CO
module provides a time-resolved measurement of the CO
concentration (capnogram) and the end-tidal CO
physiological parameter is determined by an internal algorithm
based on the analysis of the capnogram in the time range. The
inspiration and expiration cycles are distinguished by comparing
the differentiated capnogram with dynamically adjusted threshold
values. The etCO
deterioration in the measurement accuracy of the gas
measurement at the end of the ventilation cycle is expected and
the given measurement tolerance applies within the stated limits of
the respiratory rate and I:E ratio.
Measurement range for the respiratory rate
The measurement range for the respiratory rate and the possible
impact of the respiratory rate on the accuracy of the gas
measurement at the end of the ventilation cycle were evaluated by
feeding CO testing gas and compressed air alternatively through
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a switch valve at a set rate. The gas was removed by suction via the
CO module and the measurements were evaluated. The
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frequency of gas switching was then increased until the
measurement deviations exceeded the set tolerance.
Device
< 0.4 vol% in 6 h
10 s
• 4.5 s
• 6 s
40 Hz
8 h
monitoring
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values are determined on the basis of this. No
2
MEDUMAT Standard
14 Appendix
2
2
(etCO ). This
2 2
2
EN 247