Abstract: A breathing assistance apparatus including a body shaped to be at least partially positioned within the oral cavity of a user, the body including: a bite configured to receive teeth of the user in use; an extra-oral opening that extends between lips of the user; an intra-oral opening provided in the oral cavity to allow airflow into and/or out of a posterior region of the oral cavity; and, at least one airway wall configured to define in combination with the bite an enclosed airway extending between the extra-oral and intra-oral openings.

Abstract: A breathing assistance apparatus includes an oral appliance and a valve arrangement. The oral appliance has an appliance body shaped to be at least partially positioned within the oral cavity of a user. The valve arrangement includes a valve body and a valve member. The valve body includes a valve airway in fluid communication with a user airway, and the valve member is positioned in the valve airway, movable between first and second positions at least in part as a result of airflow through the valve airway. The valve member at least partially obstructs the valve airway in the second position so that there is a differential resistance during inhalation and exhalation.

Abstract: An apparatus for providing breathing assistance includes first and second bodies configured to be positioned within an oral cavity of a user. Each of the first and second bodies includes a recess configured to receive a respective set of teeth of a user. An adjustable mounting is configured to interconnect the first and second bodies to thereby allow a relative position of the first and second bodies to be adjusted.