Abstract: A patient interface includes a body member, a partition, a nasal seal portion, and a port. The partition is integral with the body member, and separates an interior of the member into a first chamber configured to receive a nose of a patient and a second chamber. The nasal seal portion is integral with the partition, and projects therefrom into the first chamber. The nasal seal portion includes a seal surface and a gas passage therethrough. The seal surface is configured to conform with a lower portion of the nose that is surrounding nasal passages of the patient, without entering the nasal passages of the patient, when the patient interface is mounted operatively on the face of the patient. The port integral with the member is in fluid communication with the second chamber for delivery of gas to the patient via the gas passage in the nasal seal portion.

Abstract: The invention relates to an optical measurement device (10) for measuring an optical appearance of a surface (16) of a sample (18), in particular the surface (16) of a human skin, comprising a measuring head (30) which can be brought into contact with the surface (16) of the sample (18), the measuring head (30) comprising: an illumination device (12, 46) for illuminating the surface (16) with an illumination beam (14); a detection device (23) for detecting a response beam (20), wherein the response beam (20) is the response of the sample (18) to the illumination beam (14). The detection device (23) comprises a screen (22, 52) for intercepting the response beam (20), wherein the screen (22, 52) extends approximately a quarter hemisphere in order to realize measuring head (30) with a small contact area with the surface.