User manual



Fig. 6.2: Controlling panel of the ventilator.
The individual parameters of artificial lung ventilation are set up on the controlling panel:
• Ventilation frequency (f
CMV
) - frequency of guided breathing. The frequency may be
set up as the number of breaths per minute.
• Tidal volume (V
T
) - to be set up by means of the V
T
button. It is the volume of air in
one inspiration. In some modes, e.g. the pressure-guided ventilation, this parameter
cannot be set up.
• Inspiration and expiration time, the ratio of the inspirium and expirium time (I:E) -
these are determined by the guided breathing frequency and the ratio of the inspirium
and expirium time (I:E) (%). The percentual set-up of the cycle determines the ratio
between inspirium and expirium. This set-up divides the entire breath cycle (100 %) to
the inspiration and the expiration stage.
Fig. 6.3 depicts a typical pressure and flow curve for a certain set-up of the I:E ratio. The light
button determines the start of expiration, thus also the I:E ratio. If the upper button is set to
25 %, the scale is divided into two segments. In this way, the duration ratio I:E is set to 1:3.
The I:E ratio is displayed on the monitor of the patient’s ventilation functions.
Inspiration time is determined by the lower dark button. Usually, this button is in
contact with the expiration button. That means no time for inspiration delay - plateau (see
below) has been set up.
Expiration time is set up in percentage and determines when the inspiration ends and
the expiration starts. It is set up by the upper light button.
74