Instructions for Use Oxylog 2000 plus SW 1.n 119
Principles of Operation
Since the synchronization of the mandatory ventila-
tion stroke reduces the effective VC-SIMV time,
which would result in an undesirable increase in
effective respiratory rate, Oxylog 2000 plus pro-
longs the subsequent spontaneous breathing time
by the missing time difference ∆T – thus preventing
an increase in SIMV respiratory rate. The respira-
tory rate parameter RR remains constant. This
parameter, in combination with the tidal volume VT,
sets the minimum ventilation.
During the spontaneous breathing phases, the
patient can be assisted with pressure by PS
pressure support.
In the course of progressively weaning the patient
from artificial ventilation, the ventilation respiratory
rate RR is further reduced while the spontaneous
breathing time is increased, so that the required
total minute volume is increasingly supplied by
spontaneous breathing.
PS (optional)
Pressure Support
Pressure support for insufficient spontaneous
breathing.
The device takes over part of the inhalation func-
tion, with the patient maintaining control of sponta-
neous breathing.
The SpnCPAP system supplies the spontaneously
breathing patient with breathing gas, even if the
inspiration effort is weak.
The pressure support of the PS system is started:
when the spontaneous inspiration flow reaches the
set value of the flow trigger, or at the latest
when the spontaneous inspired volume exceeds
25 mL.
043
Phase
I II
Paw
Insp.
Flow
t
t
CPAP
Start of inspiration
max. 4 s
End of inspiration
25 % Insp. Flow
PPS
DPS
over PEEP
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