5Setting up for invasive use
English
Note: Other external humidifiers can be used for noninvasive setup. ResMed
recommends using a breathing system (including antibacterial filter, air tubings, external
humidifier) with an impedance of maximum 2 cm H2O at 30 L/min, 5 cm H2O at 60 L/min
and 16 cm H2O at 120 L/min.
4Connect one end of the air tubing firmly onto the air outlet of the H4i.
5Connect the mask system to the free end of the air tubing.
6Select the mask type (select Setup menu, then Clinical Settings, then Advanced Settings).
7Perform Learn Circuit (see “Setup menu: Options” on page 16).

Attaching the H4i heated humidifier for noninvasive use

Use of the H4i heated humidifier may be recommended by your clinician. For information
on using the H4i, see the H4i user guide.
WARNING
•Always place the H4i on a level surface below the level of the patient to prevent
the mask and tubing from filling with water.
•Make sure that the water chamber is empty and thoroughly dried before
transporting the humidifier.
•The H4i heated humidifier is not intended for mobile use.
•Do not overfill the water chamber, as during use this will cause water to spill into
the air circuit.
•For optimal accuracy and synchrony, perform Learn Circuit with a change of the
circuit configuration, in particular when adding or removing high impedance
components (eg, antibacterial filter, external humidifier, water trap, nasal pillow
type mask or air tubing). See “Setup menu: Options” on page 16.
CAUTION
Check the air circuit for water condensation. Use a water trap or a tubing wrap if
humidification is causing water condensation within the tube.
Notes:
•
A humidifier increases resistance in the air circuit and may affect triggering and cycling, and
accuracy of display and delivered pressures. Therefore perform the Learn Circuit function
(see “Setup menu: Options” on page 16). The device adjusts the airflow resistance.
•The heating feature of the H4i is disabled when the device is not mains powered.
Setting up for invasive use
The Stellar can be used invasively only with the ResMed Leak Valve.
WARNING
•Make sure that all the air inlets at the rear of the device and under the device and
vents at the mask or at the ResMed Leak Valve are unobstructed. If you put the
device on the floor, make sure the area is free from dust and clear of bedding,
clothes or other objects that could block the air inlets.
•When using a Heated Moisture Exchange Filter (HMEF), replace the HMEF
regularly as specified in the instructions provided with the HMEF.
•The H4i is contraindicated for invasive use. An external humidifier approved for
invasive use is recommended according to EN ISO 8185 with an absolute
humidity of > 33 mg/L.
•For optimal accuracy and synchrony, perform Learn Circuit with a change of the
circuit configuration, in particular when adding or removing high impedance
components (eg, antibacterial filter, external humidifier, water trap, nasal pillow
type mask or air tubing). See “Setup menu: Options” on page 16.