Treaton MV200, User Manual

Page: 143 / 222

5.6 Compensation of endotracheal tube resistance
5-19
5.6 Compensation of endotracheal tube resistance
Before the beginning of the ventilation, check the parameters of the used endotracheal tube in
[Menu]
→
[Ventilation parameters]
→
[Patient’s parameters]
→
[Tube parameters]:
•
Tube type – endotracheal (ET), tracheostomy (TST);
•
The diameter of the tube.
Selection of the tube diameter is made depending on the patient's ideal weight IBW in the per-
mitted range of the weight (for the protection from errors):
Table 5.1. Application of the endotracheal tube
IBW, kg
Default diameter of ET and
TST, mm
Permitted range of the diame-
ters of ET and TST, mm
7
-
10
4.5 4.5
10
-
19
4.5
4.5
-
5.5
19
-
25
5.0
5.0
-
6.0
25
-
32
5.5
5.5
-
7.0
32
-
37
6.0
6.0
-
7.5
37
-
50
6.5
6.5
-
8.0
50
-
61
7.0
7.0
-
9.0
61
-
71
7.5
7.5
-
9.5
71
-
101
8.0
8.0
-
10
101
-
130
8.5
8.5
-
10
130
-
150
9.0
9.0
-
10
The average value of the ET diameter for the current ideal body weight of the patient is set by
default.
The function of the endotracheal tube compensation is available in CPAP+PS mode by adjust-
ing of ETC parameter in the line of ventilation parameters setting (top row).
The user can select the desired level of the tube resistance compensation from 0 to 100 %. A
value of 0 corresponds to the OFF state (the initial state of the device at power up).
Optionally the function of the endotracheal tube compensation may be available in other modes
of the ventilation.
At the activation of the tube resistance compensation, the instantaneous pressure after the tube
is calculated as follows:
Paw1 = Paw - ∆ P (9)
where: Paw1 – pressure after (below) the tube, cmH
2
O,
Paw – measured pressure, cmH
2
O,
∆ P – pressure drop on the tube calculated according to the data about the type and diameter
of the tube and the set degree of compensation, cmH
2
O
Also at the activation of the function pressure curve changes its form on the device’s display.
Not only the pressure in the circuit, but also calculated pressure below the tube is displayed