26
Description of device
EN
In S, ST, PSV, aPCV, aVCV (VENTI
logic
LS only), SIMV, MPVp and MPVv
modes, the doctor
can select one of 8 trigger stages for inspiration and one of 14 trigger stages for exhalation
(not with aPCV, aVCV, MPVp and MPVv).
In ST mode the expiratory trigger can be deactivated. The switch to exhalation is then on
a time-controlled basis.
Mouthpiece ventilation can be used in the form of volume-controlled mode MPVv, or
pressure-controlled mode MPVp.
If no breath into the device is taken in S mode, therapy pressure is automatically provided
at a minimum frequency of 5 breaths a minute.
CPAP mode does not provide any respiratory assistance. The therapy device provides a
constant positive therapy pressure in this mode.
The display shows therapy pressure and, as a function of mode, current values for IPAP and
EPAP / PEEP and respiratory frequency (f). Depending on the patient circuit used, tidal
volume (VT) is displayed in the case of a leakage system and tidal volume on inspiration
(VTi) in the case of valve ventilation. When the single patient circuit is used, only tidal
volume on inspiration can be measured, whilst with the double patient circuit
(VENTI
logic
LS only), total tidal volume can be measured.
Spontaneous or mechanical respiratory phase switches and the pressure change are also
shown in graphical form.
2.3.7
SIMV mode
SIMV mode (synchronized intermittent mandatory ventilation) is a mixture of mandatory
and assisted ventilation.
If there is no spontaneous respiration the device will mandatorily ventilate the patient once
the
T
apnea
time has elapsed at a respiratory frequency of
f
backup
, a ratio of
Ti/T
ba
(backup)
and an inspirational pressure level of
P
SIMV
.
In the case of spontaneous respiration the device switches to assisted ventilation using the
set
IPAP
value. The pressure level will then fluctuate cyclically at a frequency of
f
SIMV
, a
ratio of
Ti/T
ba
and an inspirational pressure level of
P
SIMV
. The respiratory frequency in this
case is dictated by the patient.
2.3.8
Mouthpiece ventilation (MPV)
Ventilation modes MPVp and MPVv are a pressure-controlled and a volume-controlled
mode for patients with spontaneous breathing who are not subject to invasive ventilation.
The MPV modes are typically used with a mouthpiece. The patient has to be capable of
closing his or her lips adequately for this purpose.
