GE HEALTHCARE E-PSMP, Technical Manual

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Module Frames and Modules
10 - 6
2062973-004
Figure 4 MiniC block diagram
Mini D-fend
The sample is drawn through the sampling line. The gas then enters the module through the
water trap where it is divided into two flows, a main flow and a side flow. The main flow goes
into the analyzer. This flow is separated from the patient side by a hydrophobic filter. The side
flow creates a slight subatmospheric pressure within the Mini D-fend water trap which causes
fluid removed by the hydrophobic filter to collect in the bottle.
Zero valve
The main flow passes through a magnetic valve before proceeding to the analyzer. This valve is
activated to establish the zero point for the MiniC sensor. When the valve is activated, room air
is drawn through a filter into the internal system and the gas sensor.
Nafion
1)
tube
A Nafion tube is used between the water trap and the zero valve to balance the sample gas
humidity with that of ambient air. The tube prevents errors caused by the effect of water vapor
on gas partial pressure when humid gases are measured after calibration with dry gases.
Gas analyzers
After the zero valve and Nafion tube, the gas passes through the miniC sensor.
1 Nafion is a registered trademark of Perma Pure Inc.