Synchronized Intermittent Positive Pressure Ventilation (Sippv) - Dräger Babylog 8000 plus Instructions For Use Manual

Description
Ventilation mode
The effects of the hose system can be considerable, particu-
larly with small patients, because Crs and Cs are approxi-
mately equal.
If, for example, Crs = Cs = 0.5 mL/mbar, only half of the set
continuous flow actually enters the patient's lungs.
This effect (the fact that the hose system is also ventilated)
occurs on all ventilators. In order to measure the actual
inspired and expired tidal volume, the flow sensor of the
Babylog 8000 plus is located in the Y-piece.
Synchronized Intermittent Positive Pressure Ventilation
(SIPPV)
The ventilation strokes are synchronised with spontaneous
breathing. A stroke begins when a spontaneous inspiration is
detected and ends after the inspiration time T
The shape of the ventilation stroke is set just as for IPPV/IMV.
The Babylog 8000 plus detects the spontaneous inspiration by
flow measurement. A ventilation stroke is triggered if
– inspiratory flow is detected after an expiration and
– the volume continuously inspired during the spontaneous
inspiration (the trigger volume V
sensitivity and
– the volume V is inspired by the end of T
trig
Furthermore, a ventilation stroke may not be triggered less
than 0.2 seconds after the end of the preceding stroke, so that
the patient has time to breathe out.
The patient controls the ventilation frequency, which may
be up to
fmax = 1/(T + 0.2 s + RT)
I
where RT is the trigger response time, i.e. the time from the
start of a spontaneous inspiration to the start of the triggered
ventilation stroke.
If the patient stops breathing, ventilation in IPPV/IMV mode is
started.
SIPPV is suitable for patients with sufficient spontaneous
breathing and regulation. The patient can be weaned from the
ventilator by gradually reducing the inspiration pressure.
118
.
I
) reaches the set trigger
trig
.
E
Paw
P
insp
PEEP
TI
Flow
Paw
P
insp
PEEP
TI
Flow
Vtrig
TE
Vtrig
t
t
t
t