Fabius
®
Function Description
2-58
Copyright 2000 Draeger Medical, Inc.
sec2_funcdescrip_b.fm
12 Flow Measurement
A moving screen (moving vane) measures the expiratory flow of the patient. A
flow-dependent pressure builds up at the moving vane. This pressure is picked up at
the differential pressure sensor (
∆P). The differential pressure sensor converts the
pressure into an electronic signal and transmits this signal to the microcontroller.
Fig. 41: Flow measurement principle
V
.
P
P
∆P results from the differential pressure
(back-pressure from measuring lines 1 and 2)
moving vane
flow sensor
measuring line
measuring line
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