A system for accessing a nasal cavity and paranasal sinuses in the head of a patient, the system including a weak straight supporter, a curved supporter and a strong straight supporter, the weak straight supporter being made of a shape memory material and having a straight shape memory, the curved supporter having a curved shape memory, the curved supporter having rigidity which exceeds that of the weak straight supporter, the strong straight supporter having rigidity which exceeds that of the curved supporter, wherein when the strong straight supporter overlaps the curved supporter, an overlapped portion of the curved supporter conforms to the straight shape of the strong straight supporter, and wherein when the curved supporter overlaps the weak straight supporter, an overlapped portion of the weak straight supporter conforms to the curved shape of the curved supporter, the supporters are slidably coupled therebetween.
