[Drain for maintaining patency of an intranasal Antrostomy (author's transl)].

We developed a plastic drain for maintaining patency of an intranasal antrostomy. The drain can be easily inserted through the nasoantrostomy by means of a curved blunt hemostat. Repeated irrigation of the maxillary sinus is possible through, a wide canal, and the appropriate solutions are instilled. The drain can be removed after two months without any problems.