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  2. How Much Do Masks Really Cost? From Cloth to KN95, Here ... - AOL

    www.aol.com/much-masks-really-cost-cloth...

    KN95 masks are more expensive than disposable or fabric masks. You can find a pack of 25 KN95 masks for $38 or a pack of 50 between $45 and $60 depending on the retailer. Similar to the N95, each ...

  3. ResMed - Wikipedia

    en.wikipedia.org/wiki/ResMed

    ResMed Inc. is an American medical equipment company based in San Diego, California.It primarily provides cloud-connectable medical devices for the treatment of sleep apnea (such as CPAP devices and masks), chronic obstructive pulmonary disease (COPD), and other respiratory conditions.

  4. Bag valve mask - Wikipedia

    en.wikipedia.org/wiki/Bag_valve_mask

    Bag valve mask. Part 1 is the flexible mask to seal over the patients face, part 2 has a filter and valve to prevent backflow into the bag (prevents patient deprivation and bag contamination) and part 3 is the soft bag element which is squeezed to expel air to the patient

  5. Surgical mask - Wikipedia

    en.wikipedia.org/wiki/Surgical_mask

    A surgical mask serves as a mechanical barrier that interferes with direct airflow in and out of respiratory orifices (i.e. nose and mouth).Most commonly used surgical masks are designed to only trap respiratory droplets, and therefore do not filter or block fine airborne particles that are smaller than the designed filtration ratings, which may be transmitted by coughs, sneezes, unintentional ...

  6. Venturi mask - Wikipedia

    en.wikipedia.org/wiki/Venturi_mask

    The venturi mask, also known as an air-entrainment mask, is a medical device to deliver a known oxygen concentration to patients on controlled oxygen therapy. [ 1 ] [ 2 ] The mask was invented by Moran Campbell at McMaster University Medical School as a replacement for intermittent oxygen treatment.

  7. Simple face mask - Wikipedia

    en.wikipedia.org/wiki/Simple_face_mask

    The simple face mask can deliver higher flow rates than nasal cannula (6–10 liters per minute) for an FiO2 of 30- 60% oxygen. [1] Nasal cannula and simple face masks are described as low flow delivery systems. [2] [3] Unlike the non-rebreather and partial rebreather masks, the simple face mask lacks a reservoir bag.

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