Welch Allyn Duet CO2 Module - User Manual - Manual (Page 16)

Duet CO
2
Module OEM Implementation Manual
Page 16 Confidential Welch Allyn OEM Technologies
NOTE Flex circuit and Nicolay receptacle are not included with the MS/SS and MS Duet CO
2
Modules and may be ordered separately from Welch Allyn OEM Technologies or supplied
directly by the OEM.
NOTE Flex circuit layout and dielectric strength may be customized as per OEM requirements. The
OEM must supply routing and layout drawings to Welch Allyn OEM Technologies for a
custom flex design. Consult with Welch Allyn OEM Technologies for additional information
on ordering a custom flex circuit.
The Welch Allyn OEM Technologies flex circuit is double-insulated to provide single fault protection
and provides up to 10kV dielectric strength.
The Nicolay receptacle is fastened to the housing of the host system and provides the interface for the
mainstream sensor.
Mainstream Sensor
The mainstream sensor houses the hardware necessary to determine the CO
2
molecule count in the
sample chamber. The IR beam passes from the IR source on one side of the sensor housing through
the windows of the airway adapter to the other side of the housing. This output is communicated to the
Duet CO
2
Module for measurement calculation.
The functional components of the mainstream sensor include the mainstream sensor connector, cable
and mainstream sensor head.
NOTE Mainstream sensor is not included with the MS/SS and MS Duet CO
2
Modules and must be
ordered separately from Welch Allyn OEM Technologies.
The mainstream sensor connector interfaces the mainstream sensor to the Nicolay receptacle.
Within the mainstream sensor connector is an EEPROM that retains calibration information for the
sensor and OEM specific information that allows the sensor to be used only with the electronics
identified for a specific OEM.
NOTE Mainstream sensor EEPROM is pre-configured by Welch Allyn OEM Technologies after
obtaining OEM specific information.
The cable connects the mainstream sensor connector to the mainstream sensor head.
The mainstream sensor head houses the IR optical components, chopper drive motor and
mainstream sensor circuit board. The inverted U-shaped housing of the mainstream sensor head
snaps onto the airway adapter.
Airway Adapter
The airway adapter is used as the sample chamber for the sensor and is connected between the
endotrachial tube and the ventilator’s wye piece. A variety of airway adapters are available. Selection is
typically based on adult/pediatric/neonate status, multiple use versus disposable and low dead space
performance.
NOTE Airway adapter is not included with the MS/SS and MS Duet CO
2
Modules and may be
ordered separately from Welch Allyn OEM Technologies.