DEVICE: Dorma 500 (00606959040410)

A mains electricity (AC-powered) device designed to heat and humidify air/oxygen inspired by a patient to help maintain the mucous membranes of the respiratory tract typically during periods of prolonged respiratory support/therapy (e.g., mechanical ventilation, BPAP/CPAP therapy). The heated/humidified gases are delivered to the patient's airway and lungs via the nose/mouth or a tracheostoma in association with a parent respiratory device (e.g., ventilator, BPAP/CPAP unit). The humidifier typically includes a heating element and provisions for attaching a humidification chamber and tubing set.

A flexible, form-shaped device designed to be placed over a user's nose to interface with a continuous positive airway pressure (CPAP) or bi-level positive airway pressure (BPAP) unit to provide the respiratory tract with direct ambient air, or medical oxygen (O2) and air, at a higher pressure than ambient air for noninvasive positive pressure ventilation (NPPV). It is typically made of plastic and/or silicone materials that create an airtight seal around the nose. It is available in various designs and sizes and stabilized with a headstrap. This is a reusable device.

A portable, mains electricity (AC-powered) device, which may include rechargeable batteries, intended to assist noninvasive ventilation (i.e., without use of an artificial airway) using continuous positive airway pressure (CPAP) during spontaneous respiration, primarily to treat adult patients affected by obstructive sleep apnoea (OSA); it may also be intended to treat snoring. It is a small desktop unit with controls, and may include a built-in humidifier; the airway pressure may be automatically adjusted to help provide optimal CPAP through use of a sensor (auto CPAP). The device is intended for use in the home but may also be used in healthcare facilities.