[Submucosal injection of pharyngeal ostium of Eustachian tube for diagnosis of patulous Eustachian tube].

Objective: To evaluate the clinical value of submucosal injection of pharyngeal ostium of Eustachian tube in diagnosing patulous Eustachian tube(PET). Method: Twenty-six patients(32 sides),whose the symptoms were consistent with PET,were enrolled from March 2014 to May 2016.The symptoms and signs of all patients were evaluated after submucosal injection of saline into the Eustachian tube. Result: Immediately after submucosal injection of saline into the Eustachian tube,the symptoms and signs disappeared in 24 cases(29 sides),and improved in 2 cases(3 sides).The resolution and/or improvement of symptoms and signs lasted for less than 24 hours in 12 patients,for more than 24 hours in 9 patients,and for more than 48 hours in 4 patients.No adverse reactions were observed. Conclusion: Submucosal injection may be a simple and practical method for auxiliary diagnosis of PET,and may be used in preoperative evaluation of Eustachian tuboplasty.