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5Setting up for invasive use
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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
tran
sporting 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
th
e air circuit.
• For optimal accuracy and synchrony, perform Learn Circuit with a change of the
ci
rcuit 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 de
vice is not mains powered.
Setting up for invasive use
The Stellar can be used invasively only with the ResMed leak port and an uncuffed or
deflated cuff tracheostomy tube.
WARNING
• 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
invasi
ve 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
ci
rcuit 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
When using a humidifier check the breathing system regularly for accumulated
water.
Note: W
hen the mask type is set to Tr
a ch, the Non-Vented Mask alarm will be
automatically enabled to alert you when the leak port has no vent holes or when the vent
holes are blocked.