Pressure-Flow Characteristics - MIETHKE proGAV 2.0 Mode D'emploi

| INSTRUCTIONS FOR USE
GB

PRESSURE-FLOW CHARACTERISTICS

The pressure flow characteristics of the adjustable differential pres-
sure unit in the proGAV 2.0 are shown as an example for pressure
levels 0, 10 and 20 cmH O in the horizontal valve position below.
2
30
25
20 cmH
20
15
10 cmH
10
5
0 cmH
0 5 10 15 20 25
Flow (ml/h)
Fig. 19: Pressure flow characteristics for selected pressure levels
of the adjustable differential pressure unit
Vertical valve position
The opening pressure of the proGAV 2.0 in the vertical position
is the sum of the opening pressure of the adjustable DP-unit and
the gravitational unit.
The following diagrams (see fg. 21) show the pressure-flow-cha-
racteristics for some pressure settings in the vertical body position.
The total opening pressure refers to a reference flow of 5 ml/h.
When the flow rates reach 20 ml/h, the opening pressures are ap-
proximately 1-2 cmH O higher.
2
60
55
50
45
40
35
20 cmH
30
25
10 cmH
20
15
0 cmH
10
5
5 10 15 20 25
0
a) Flow Rates (ml/h)
60
55
50
45
40
20 cmH
35
30
10 cmH
25
20
0 cmH
15
10
5
0 5 10 15 20 25
b) Flow Rates (ml/h)
Fig. 19: Graphs: proGAV 2.0 a) 10 cmH
24
O
2
O
2
O
2
30 35 40 45 50 55
O
2
O
2
O
2
30 35 40 45 50 55
O
2
O
2
O
2
30 35 40 45 50 55
O, b) 15 cmH O, c) 20 cmH
2 2
60
55
50
45
20 cmH
40
35
10 cmH
30
25
0 cmH
20
15
10
5
0 5 10 15 20 25
c) Flow Rates (ml/h))
60
55
50
20 cmH
45
40
10 cmH
35
30
0 cmH
25
20
15
10
5
0 5 10 15 20 25
d) Flow Rates (ml/h)
60
55
20 cmH
50
45
10 cmH
40
35
30
25
20
15
10
5
0 5 10 15 20 25
e) Flow Rates (ml/h)
60
20 cmH
55
50
10 cmH
45
40
0 cmH
35
30
25
20
15
10
5
0 5 10 15 20 25
f) Flow Rates (ml/h)
O, d) 25 cmH O, e) 30 cmH
2 2
proGAV 2.0
O
2
O
2
O
2
30 35 40 45 50 55
O
2
O
2
O
2
30 35 40 45 50 55
O
2
O
2
0 cmH O
2
30 35 40 45 50 55
O
2
O
2
O
2
30 35 40 45 50 55
O, f) 35 cmH O
2 2