Abstract: A nasal delivery system comprising a nasal insertion tube and a fluid medium located in communication with the nasal insertion tube. The nasal insertion tube comprises a tubular wall forming an internal flow path from an inlet to an outlet. The outlet is configured to be arranged in a nostril of a person to thereby facilitate an upstream flow of air in a first flow path from an ambient space through the internal flow path to the respiratory tract of the person during inhaling and a downstream flow of air in a second flow path from the respiratory tract of the person outside the internal flow path to the ambient space during exhaling.

Abstract: The invention provides a monitoring device for analysing a sleep condition of an individual. The device comprises at least a first motion sensor, a second motion sensor, and a processor. The first and second motion sensors are adapted to be positioned at an eyelid of the individual and to communicate a movement signal representing eye movement to the processor. The processor is adapted from the movement signal to provide an identifier significant for the sleep condition. The device may further comprise a tension sensor arranged to provide a tension signal based on sensed muscle tension in the eyelid. The motion sensors may comprises gyroscopes, accelerometers, or strain sensors.