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 (Fig. 2B, 3B) at which at least a part of the nasal cavity element (120a；120b) protrudes from the sleeve (140a；140b).
