COVID-19 Information | ResMed Asia
COVID-19 Information
Healthcare professionals > COVID-19 Information

At ResMed, we are dedicated to providing respiratory care products to countries and healthcare systems across the globe, just as we have done for decades. Now, as coronavirus (COVID-19) continues to spread throughout the world, we stand strong alongside healthcare providers and professionals treating those in need of a very high level of care.

Our long-time commitment to improving the lives of people with breathing disorders serves patients especially well in these challenging times. We are making all efforts to reach out to our community of customers to inform, engage and educate on how essential treatment can be delivered as soon as possible. Our range of invasive and non-invasive ventilation systems, CPAP therapy, oxygen therapy, masks and monitoring software solutions continue to help administer vital respiratory support in hospitals and homes.



Responses to customer questions about coronavirus


  • 1. How much oxygen can be entrained through each device (Lumis, Stellar, Astral), and what FiO2 can we achieve?

    Astral and Stellar are able to entrain supplemental oxygen through the device via an oxygen port. These devices are designed to be compatible with supplemental oxygen up to a level of 30 L/min.

    Lumis devices are compatible with supplemental oxygen of up to 4 L/min in iVAPS mode, or up to 15 L/min in all other modes.

    At a fixed rate of supplemental oxygen flow, the inhaled oxygen concentration will vary depending on the ventilation mode and settings, patient breathing pattern, mask selection, and leak rate.



    When an adult patient is using a non-vented circuit (double limb and single limb with valve, invasive and non invasive), almost 100% FiO2 can be achieved with an additional 30L/min of supplemental oxygen and more than 80% FiO2 can be achieved with an additional 15L/min of supplemental oxygen.

    When an adult patient is using a vented circuit (Leak system), almost 75% FiO2 can be achieved with an additional 30L/min of supplemental oxygen, and more than 60% FiO2 can be achieved with an additional 15L/min of supplemental oxygen.


    When adding 30L/min of supplemental oxygen, more than 90% FiO2 can be achieved if there is no leak, and almost 80% with a leak of 20L/min.

  • 2. How can oxygen be added to the circuit?

    Astral and Stellar

     To add supplemental oxygen, please follow the instructions below:

    1. Unlock the low flow oxygen inlet at the rear of the device by pushing up on the locking clip.
    2. Insert one end of the oxygen supply tubing into the oxygen port connector. The tubing will automatically lock into place.
    3. Attach the other end of the oxygen supply tubing to the oxygen supply.
    4. Start ventilation.
    5. Turn on oxygen and adjust (at the oxygen supply) to the prescribed flow rate or FiO2 level.

    For Astral devices:

    For Stellar devices:

    To remove supplemental oxygen:

     Before you remove supplemental oxygen from the device, ensure the oxygen supply has been turned off.

    1. Unlock the low flow oxygen inlet at the rear of the device by pushing up on the locking clip.
    2. Remove the oxygen port connector from the low flow oxygen inlet.

    A low pressure oxygen connector (product code: 24971) is needed to connect the low flow oxygen inlet to the oxygen supply tubing. Please see below.


    To connect supplemental oxygen to Lumis devices, you can either use a ClimateLineAir Oxy tube or an oxygen connector port. For more information on how to set up the device with supplemental oxygen, refer to the user guide supplied with the accessory you choose to use.

    Please note:

    • Adding oxygen may affect the delivered pressure and accuracy of the displayed and reported values (e.g. leak, minute ventilation and AHI).
    • Always make sure that the device is on, and airflow generated, before the oxygen supply is turned on. Always switch off the oxygen supply before turning off the device. Unused oxygen can accumulate within the device enclosure and presents a fire hazard.


  • 1. Which filters are recommended for use in a contaminated environment to reduce the risk of device cross-contamination?

    For all devices (Astral, Stellar and Lumis), it is recommended that an antibacterial Heat Moisture Exchange Filter (HME) or antibacterial filter will be used to reduce the risk of contamination. While ResMed do supply these filters, other manufacturers can provide similar filters with the same antiviral/antibacterial properties.

    To prevent the risk of cross-contamination, it is essential that an antibacterial filter is placed on the inspiratory port if the device is to be used on multiple patients .

    Please note that the filters need to be changed frequently (for more precise information please refer to the filter user instruction) and also when the devices are used on multiple patients.

    In addition, patients should follow ResMed’s user guide.

  • 2. Can filters be used at both the inlet and outlet of a device?

    To avoid cross contamination, an antibacterial filter must be placed at the inspiratory port of Astral devices, or the air oultet of the Stellar and Lumis devices. The air tubing must be attached to the other side of the filter.

    In Astral devices, antibacterial filters can be added to both the inspiratory port and the expiratory inlet. This is recommended when using nebulisers in order to protect the device.

    Antibacterial HME Filter

    The antibacterial HME filter must be placed between the patient end of the circuit and the patient interface.

    Patient interfaces include any components placed after the single circuit’s expiratory valve or exhalation port, or a double limb circuit’s Y piece. Where there is a ResMed leak valve, connect the antibactierial HME filter to the patient side of this.

    HMEs are passive humidification systems which retain heat and moisture from the patient’s exhaled gases via an internal membrane. An HME should not be used with active humidification.

    In addition, patients should follow ResMed’s user guide.

  • 3. Are the machine filters antiviral, and should we change them between patients?

    Astral: the machine filter filters particles of 10 micrometers and above. It is a dust filter and has to be changed between patients.

    Stellar: The machine filter in the Stellar device has a bacterial filtration efficiency of 99.540% on area weight 100g/m². As viruses are typically smaller than bacteria (<0.1 micrometers), the filter is not guaranteed to remove them from the entrained air. The filter has to be changed between patients.

    Lumis: The standard air filter in Lumis devices is made of non-woven polyester. The average efficiency is >75% for >7 micrometers dust. The hypoallergenic filter is made of acrylic and polypropylene fibres, in a polypropylene carrier. Its efficiency is >98% for >7-8 micrometers dust; >80% for >0.5 micrometers dust. Both types of filter have to be changed between patients.

  • 4. I want to use a Lumis/Stellar humidifier with an antibacterial filter, how do I do it?

    Please note: If using an antibacterial filter, it must be checked for signs of moisture or other contaminants, particularly during humidification. Failure to do so could result in increased breathing system resistance.

    Further instruction for using Stellar with an external humidifier:

    Place the antibacterial filter at the air outlet, connect the external humidifier to the other side of the AB filter through the air tubing. Connect the other air tubing from the humidifier to the ResMed leak valve.



    Do not use an antibacterial filter with the internal humidifier H4i.

    In addition, patients should follow ResMed’s user guide.


  • 5. Are all filters for Stellar and Astral HEPA filters, and are they more effective than other filters?

    HEPA filters remove at least 99.95% of particles with a diameter equal to 0.3 micrometers from the air which passes through.

    Antibacterial and antibacterial HME filters filter particles >0.1 micrometers, meaning that they are more effecitive at filtering particles and microorganisms than HEPA filters.

    In addition, patients should follow ResMed’s user guide and clinical guide.

  • 6. Are there any further ways of protecting the Astral air inlet in a hospital setting?

    To protect the Astral air inlet in a hospital setting, staff should ensure the air filter is not blocked by clothes or other objects, inspect the air inlet filter regularly and replace if necessary.

    In addition, patients should follow ResMed’s user guide.


  • 1. Can the devices be disinfected between patients, or should they be decontaminated?

    Information about cleaning and disinfecting the external device surfaces can be found in the clinical guide. However, as COVID-19 is a novel virus, specific decontamination methods have not yet been validated.

    In addition, patients should follow ResMed’s cleaning procedures, as outlined in the user guide.

  • 2. Are ResMed products “Made in China” safe?

    Yes, all Chinese-made components for ResMed products are safe for use, and all components received at a ResMed manufacturing facility go through rigorous safety, cleanliness, and quality checks before manufacturing – processes designed to safeguard against such health threats as COVID-19.