Welch Allyn Duet CO2 Module - User Manual - Manual (Page 18)

Duet CO
2
Module OEM Implementation Manual
Page 18 Confidential Welch Allyn OEM Technologies
The Water trap is a user-supplied cartridge that removes excess moisture in the sample line before the
sample is delivered to the sample chamber. The Water trap is designed to fully occlude once the filter is
saturated.
The Water trap receiver is the receptacle for the Water trap and can be molded by the OEM into the
main housing of the host monitor. The external end of the Water trap is connected to the sample line.
The Water trap receiver switch assembly ensures that the Water trap is properly inserted into the
Water trap receiver before the pump begins operation. This eliminates the possibility of the user
bypassing the Water trap.
Inlet and Exhaust Tubing
The internal inlet tubing provides the means to transport the airway gas sample from the Water trap
receiver to the sidestream bench. The inlet tubing includes the tubing, connectors and a secondary
shutoff pellet. Attachment of the inlet tubing to the Water trap receiver is via a Luer
â connector. A
secondary shutoff pellet is attached in line with the inlet tubing to provide additional insurance for
saturation detection.
The exhaust tubing provide the means to expel the exhaust gas. A filter, or 5um screen, is in line with
the exhaust tubing to muffle, or reduce the pump noise.
CO
2
Sample Line and Cannula
A CO
2
sample line, or sample line, is used to transport the airway gas sample from patient to the Water
trap assembly. Connection of the sample line on the patient side is via a female oriented Luer
â
connector attached to the sample line.
Note :
Sample lines are not included with the Duet CO
2
Module and may be ordered separately from
Welch Allyn OEM Technologies or other suppliers.
For non-intubated patients, the sample line connects to a cannula that is positioned on the patient. A
variety of cannulas are available to accommodate patient requirements. Nasal, oral/nasal and divided
cannulas that deliver oxygen and sample CO
2
simultaneously may be used.
Note Cannulas are not included with the Duet CO
2
Module and may be ordered separately from
Welch Allyn OEM Technologies or other suppliers.
For an intubated patient, the sidestream sample line connects to the patient’s breathing circuit.