[Application of floating tube in dilation of eustachian tube under nasal endoscopy to treat post-irradiation secretory otitis media].

Objective: To analyse the function of eustachian tube in post-irradiation secretory otitis media and investigate the curative effect of dilating eustachian tube with Swan-Gans thermodilution catheter for treating post-irradiation secretory otitis media in NPC patients.

Method: Twenty-one (37 ears) post-irradiation secretory otitis media patients with NPC were selected in this study, by using eustachian tube function synthetic inspection facility (JK-04A model), the eustachian tube function was examined, and the obstructive eustachian tube was dilated with Swan-Gans thermodilution catheter under nasal endoscopy.

Result: The eustachian tube function in 37 ears with post-irradiation secretory otitis media reveals normal, obstructive, insufficiency and opening model was 2, 21, 8, and 6 respectively.

[The damaged types of eustachian tube function in the patients of nasopharyngeal carcinoma after radiotherapy].

Objective: To study the types and the influences of eustachian tube function disorder in the patients of nasopharyngeal carcinoma(NPC) after radiotherapy.

Method: Thirty-two patients of NPC (50 ears) that the eustachian tube function were damaged after radiotherapy were examined by general examination, audiometer test, tympanometry, Tubo-tymanoaerodynamic grapy (TTAG), sonotubometry and endoscope.

Result: Two cases (4 ears) showed abnormal patency of eustachian tube, the patients' symptoms were lightly.