1
Robert M Landis, Wayne W Disanza: Nasal positive airway pressure apparatus and method. November 18, 1997: US05687715 (278 worldwide citation)

A nasal positive airway pressure device is provided having a plenum chamber, a pair of nasal delivery members, and a variable orifice venting aperture member. The variable orifice venting aperture member preferably is mounted to the plenum chamber, but may be mounted at other locations in communicat ...


2
Robert M Landis, Wayne W Disanza: Nasal positive airway pressure apparatus and method. Airways, December 26, 1995: US05477852 (278 worldwide citation)

A nasal positive airway pressure device is provided having a pair of nasal members each having a cannula tip to be inserted into the nares of the patient. Each cannula is tapered from a substantially circular cross-section outside the patient's nostril to a substantially oval cross-section at the ti ...