The disclosure relates to a system (100) for a patient (10), the system comprising one or more devices (110a； 110b). Each of the one or more devices (110a； 110b) comprises a nasal cavity element (120a； 120b) adapted to be introduced through a nostril into the nasal cavity (12) of the patient (10), tubing (130a； 130b), fluidly connected to the nasal cavity element (120a； 120b), said tubing (130a, 130b) being arranged to provide a fluid to the nasal cavity element (120a； 120b), and a sleeve (140a； 140b) slidably attached to said nasal cavity element (120a； 120b) and said tubing (130a； 130b). The sleeve (140a； 140b) is movable from a closed position (FIG. 2A) at which the sleeve (140a； 140b) encloses and protects the nasal cavity element (120a； 120b), and an open position (FIGS. 2B, 3B) at which at least a part of the nasal cavity element (120a； 120b) protrudes from the sleeve (140a； 140b).
