Atc - Dräger Babylog VN500 Instructions For Use Manual

ATC

Automatic Tube Compensation
Compensation of the tube resistance
ATC controls the airway pressure at the tracheal
level. This function calculates and displays the tra-
cheal pressure on the basis of a mathematical tube
model, the set tube type and the inside diameter of
the tube.
When tube compensation is activated,
Babylog VN500 displays the calculated tracheal
pressure in the pressure curve together with the
pressure at the Y-piece as a line. Activated tube
compensation is indicated by ATC and the tube di-
ameter in the page header bar.
When selecting loops, tracheal pressure can also
be selected as a parameter. Tracheal pressure can
also be displayed when tube compensation is de-
activated, if the calculation of tracheal pressure
was activated on the screen Start/Standby >
Tube/NIV and the tube type and diameter were en-
tered. Babylog VN500 uses this value for calculat-
ing leakage and determining lung mechanics, but
not for tube compensation. The selected degree of
compensation is not considered when displaying
tracheal pressure or when determining leakage and
lung mechanics.
Instructions for Use Infinity Acute Care System – Babylog VN500 SW 2.n
Paw
Pressure at Y-piece
Ptrach
PEEP
Flow
Tracheal pressure
t
t
Calculating tracheal pressure
Babylog VN500 calculates tracheal pressure on the
basis of a square function of tube resistance and
patient flow.
P = Paw – K
Trachea Tube
P : Pressure in the trachea
Trachea
Paw: Pressure at the Y-piece of the breathing
circuit
K : Tube coefficient (see table on page 259)
Tube
Flow: Patient flow
Inspiration: Flow >0
Exspiration: Flow <0
The selected tube type and the inside diameter of
the tube must correspond with the real tube for cor-
rect calculation and display of the tracheal pres-
sure. This is required for correct tube compensa-
tion.
Description
2
x Flow
257