Monnal T75 user manual
1.
Touch the alarm banner. The “Choice of sensors” area appears on the right of the screen,
2.
Disable the expiratory flow sensor by pressing the
[Expi. Flow]
.
The active alarm disappears, then an informative message comes up: “Expiratory flow measure-
ment inactive, use an external monitor”.
This message stays displayed.
3.
Press the
[Back]
button to return to the previous screen.
6.3.4 Nebulization
The ventilator can be used with a pneumatic nebulizer. It supplies a constant outlet pressure of 1.2 bar
(see Nebulization on page 21). The nebulization flow rate then depends on the choice of the nebulizer.
Because the only high-pressure source available in the ventilator is the high-pressure O2 inlet, nebu-
lization is possible only with the machine connected to the network (or a cylinder). The flow from the
nebulizer is then oxygen: FiO2 can therefore vary in the event of nebulization.
CAUTION:
The accuracy of the
Monnal T75
may be degraded by gases added during the use
of the nebulizer.
In order to limit these FiO2 variations and keep the ventilation parameters (such as tidal volume) con-
stant, the ventilator applies systematic compensation of the nebulization flow rate by reducing its own
outlet flow rate by an equivalent amount (and by prioritizing the reduction of its oxygen flow rate).
The FiO2 reading is displayed on screen; the value shown represents the concentration in the Y-piece
(i.e., it includes the nebulization flow).
Note:
The display of the FiO2 value is an estimation of the gas concentration and cannot
substitute external monitor precision.
There are several mechanisms to alert the user to any changes in ventilation:
Oxygen concentration not observed
When the estimated FiO2 measurement in the Y-piece is more than 30% greater than the concentration
setting on the ventilator, an acknowledgeable HIGH alarm is triggered:
“High FiO2!!! Nebuliza-
tion stopped”
.
Nebulization is then shut off.
Nebulization flow greater than the machine output flow rate.
When the flow rate from the nebulizer is greater than the output flow rate of the machine, nebulization
is automatically shut off. This occurs, for example, in pressure-controlled cycles where the end-of-in-
spiration flow rate can be zero.
If nebulization is shut off for more than half the inspiratory cycle, an acknowledgeable MEDIUM alarm
is triggered: “Nebulization ineffective!!”.
Nebulization continues in spite of this.
CAUTION:
Nebulization is deactivated for the pediatric use of the device.
To start a nebulization session:
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Summary of Contents for MONNAL T75
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