Welch Allyn Duet CO2 Module - User Manual User Manual
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Duet CO
2
Module OEM Implementation Manual
Welch Allyn OEM Technologies
Confidential
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Table of Contents
Functional Description .................................................................................................................................. 7
Introduction............................................................................................................................................... 7
Intended Use .............................................................................................................................................. 7
Terminology............................................................................................................................................... 8
Mainstream vs. Sidestream ...................................................................................................................... 8
Measuring Principle.................................................................................................................................. 8
Measurement Calculation...................................................................................................................... 10
Breath Algorithm .................................................................................................................................. 10
Measurement Compensation ................................................................................................................. 10
Water Vapor.......................................................................................................................................... 10
Pressure Broadening ............................................................................................................................. 10
Gas Mixing............................................................................................................................................ 11
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/N
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O/desflurane................................................................................................................................. 11
BTPS ..................................................................................................................................................... 11
Hardware Components ................................................................................................................................ 13
Introduction............................................................................................................................................. 13
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Main Processor Board .................................................................................................................... 13
68HC11 Microprocessor ....................................................................................................................... 14
Reset Circuit.......................................................................................................................................... 14
Primary Power Supplies ........................................................................................................................ 14
A/D Converter....................................................................................................................................... 14
D/A Converter....................................................................................................................................... 14
Source Hybrid ....................................................................................................................................... 14
Pressure transducers .............................................................................................................................. 15
Mainstream Components ....................................................................................................................... 15
Mainstream Daughter Board ................................................................................................................. 15
Flex Circuit with Nicolay Receptacle ................................................................................................... 15
Mainstream Sensor................................................................................................................................ 16
Airway Adapter..................................................................................................................................... 16
Sidestream Components ......................................................................................................................... 17
Sidestream Daughter Board .................................................................................................................. 17
Pump ..................................................................................................................................................... 17
Water trap Assembly............................................................................................................................. 17
Inlet and Exhaust Tubing ...................................................................................................................... 18
CO
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Sample Line and Cannula.............................................................................................................. 18