Abstract: An inhalation mask assembly for administering a respirable gas to an individual, which individual includes a facial area having a respiratory organ for receiving respirable gas and for expelling exhaust gas, the exhaust gas having a moisture content, the inhalation mask assembly comprising a generally cup-shaped first body receivable against the facial area for substantially enclosing the respiratory organ, an inhalation assembly for communicating respirable gas to the first body, an exhalation valve assembly for conducting exhaust gas from the first body, a generally cup-shaped second body carried by the first body for receiving exhaust gas from the exhalation valve assembly, a substantially transparent region carried by the second body, the substantially transparent region having a surface adjacent the exhalation valve assembly for accumulating moisture from the exhaust gas, and an exhalation assembly for conducting exhaust gas from the second body.

Abstract: A face mask includes a cup-shaped body for enclosing an external respiratory organ, such as the nose, of a patient. Flow of a respirable gas into the body and exhaust of expired gas from the body are unidirectional controlled by respiration check valves. A plurality of detachably securable and interchangeable accessory devices adapt the mask for use with selected prior art scavenging devices.

Abstract: A face mask includes a cup-shaped body for enclosing an external respiratory organ, such as the nose, of a patient. Flow of a respirable gas into the body and exhaust of expired gas from the body are unidirectional controlled by respiration check valves. A plurality of detachably securable and interchangeable accessory devices adapt the mask for use with selected prior art scavenging devices.

Abstract: A face mask includes a cup-shaped body for enclosing an external respiratory organ, such as the nose, of a patient. Flow of a respirable gas into the body and exhaust of expired gas from the body are unidirectional controlled by respiration check valves. The mask is molded of an elastomer which is permeated with an odorous medium to emit a selected scent. The mask is colored to impart a visual perception corresponding to the scent. A plurality of detachably securable and interchangeable accessory devices adapt the mask for use with selected prior art scavenging devices.