unusual or harsh sounds, disconnect the power cord and discontinue use. Contact your home care
provider.
Several accessories are available to make your treatment with this device as convenient and
comfortable as possible. To ensure that you receive the safe, effective therapy prescribed for you, use
only Northern accessories.
Use-by date：Indicates the date after which the medical device is not to be used. If continue using the
product after the expiration date, it may cause harm to the patient or the operator.
Please do not insert an unauthorised device such as a USB or memory card into the HF3. This action
may damage the HF3 and cause the medical device to be unable to use.
Do not add any attachments or accessories to the equipment that contravene the instructions for
use of the equipment or accessory, as the equipment might not function correctly leading to the risk
of degradation of health of the patient.
Do not use sealed patient interfaces with this equipment, to avoid the risk of suffocation or
barotrauma.
There is a risk of fire associated with oxygen enrichment during oxygen therapy. Do not use the
equipment or accessories near sparks or open flames.
Use only water-based lotions or salves that are oxygen-compatible before and during oxygen
therapy. Never use petroleum-based or oil-based lotions or salves to avoid the risk of fire and
burns.
Do not lubricate fittings, connections, tubing, or other accessories of the equipment to avoid the
risk of fire and burns.
Use only spare parts recommended by the manufacturer to ensure proper function and to avoid the
risk of fire and burns.
If you wish to update the software or download the device using information, please conduct this action
under proper authorisation.
Note that if the patient's peak inspiratory demand exceeds the flow deliveredby the unit, the fraction of
oxygen inspired by the patient will be lower than thevalue shown onscreen, due to the additional
entrainment of ambient air.Check that suitable blood saturation levels are achieved at the prescribed
flow.
IMPORTANT TIPS!
Read and understand the entire user manual before operating this system. If you have any questions
concerning the use of this system, contact your home care provider or health care professional.
The pictures in the user manual are only for reference, if they are different from the material object, the
latter shall prevail.
Nasal delivery of respiratory gases generates flow-dependent positive airway pressure (PAP). This
must be taken into account where PAP could have adverse effects on a patient.
The user and/or patient shall report to the EU Rep and the manufacturer if there is any serious incident
that has occurred in relation to the device usage or other issues.
The unit is not intended for life support.
To avoid burns:
The unit should only be used with interfaces, water chambers and breathing tubes specified in this user
manual.
Using the breathing tube or interface for longer than the specified time can result in serious injury
