Ventilation modes 99
fabian HFO | SW 5.1.x
Ref: 113003.EN / Date 2020-02-10
11.8 O
2
Therapy mode (high and low flow oxygen
therapy) HFNC
O
2
Therapy is an option which allows use of a Continuous Flow of blended gas, between 0 to 15
LPM in NEO and 0 to 30 LPM in PED mode. Nasal Cannulas of various makes like F&P, Atom or
similar can be used. There are no Alarm functions active in this mode, except for the set FiO
2
NOTE:
This mode can also be used to put the Ventilator in Standby mode. By setting a Flow of 4
LPM, the Humidifier dual servo temperature controls remain active, so there is no need to
switch it OFF in case of short-term Standby mode.
Ventilation with High-frequency Pressure
Oscillations allows a gas exchange inside the lung
despite the very small tidal volumes (often on the
scale of the anatomical dead space volume).
While pressure amplitudes inside the breathing
tube system can be quite significant, only minor
fluctuations around the mean airway pressure
occur inside the lung.
The mechanical strain due to periodic lung
expansion and relaxation is minimal.
In high-frequency oscillatory ventilation PEEP /
CPAP is comparable to the level as mean airway
Pressure. The high frequency pulses superimpose
the mean airway preassure at the set frequency.
HFOV can be applied also in Non-Invasive mode
(Nasal-HFO) with Nasal prongs, Mask or Cannula;
in this case you must turn OFF and remove the
Flow Sensor from the Y-piece of the dual limbed
breathing circuit.
11.9.1 HFO lung recruitment
• Lung recruitment is an optional setting in HFO.
• The P
mean
is thereby increased cyclically to an adjustable value “P
mean
rec.”
• The repetition frequency is selectable from one cycle / hour to four cycles / minute.
• The Inspiratory Time can be set from 2 to 60 seconds if the Expiratory Time is ≥2 seconds.
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