Measurement Of The Ventilation Parameters; O2 Measurement; Measurement Of The Airway Pressure - Dräger Babylog 8000 Technical & Service Manual

Function description
9

Measurement of the Ventilation Parameters

9.1 O Measurement
2
The O sensor continuously measures the fraction of inspired O
2
F3.1
S3.1
D3.1
Y3.1
R3.1
3a
10
Fig. 12: Measurement of the fraction of inspired O
An automatic two-step calibration is carried out at 24-hour intervals.
AIR is supplied to the pneumatic valve Y 3.1 through solenoids Y 1.1, Y 1.2, and Y 1.3. The pneumatic
valve Y 3.1 closes the connection between the O
valve Y 3.2 is opened while, at the same time, the O
R 3.2 for approximately 2.5 minutes.
Then, purging with O
2
AIR, the solenoid Y 1.3 closes, the pneumatics valve Y 3.2 closes, too, and the pneumatics valve Y 3.1
reconnects the O sensor to the inspiratory line.
2
9.2

Measurement of the Airway Pressure

Due to the continuous flow, the inspiratory measurement results in a value that is higher than the value
measured at the Y-piece. Since an expiratory measurement results in a value which is too low, an
average value is calculated from the measured values of the relative pressure sensors and displayed on
the screen.
A bactericidal metering pipe prevents contamination of the pressure sensor with expiratory gas.
34
Dräger Medical AG & Co. KGaA
Y3.2
Y3.3
11a
is carried out in the same way. After calibration, the solenoid Y 1.1 switches back to
6173.3
through the open pneumatic valve Y 3.1.
2
Insp.
.
2
sensor S 3.1 and the inspiratory line. The pneumatic
2
sensor is purged with AIR through the restrictor
2
Babylog 8000