a non-invasive full-face ventilation mask (niv mask) for non-invasive ventilation therapy used in breathing problems

face mask respiratory therapy nic invasive ventilation ventilator exygene medical equipment breathing breath respiration bpap cpap clinic hospice epidemic coronavirus covid emergency hospital medicine monitoring pandemic inhaler air nursing home senior health humidifier intensive care retirement flow disorders circuit chronic obstructive pulmonary disease diseases bronchial asthma problems dysfunctional hypoxemia hypoxia lung oxygen failure support non-invasive full-face niv used