Table 4 Eustachian tube functions according to dose of radiotherapy
From: Effect of head and neck radiotherapy on the Eustachian tube functions
Dose | Tympano before radiography at both ears | Tympano after radiotherapy at ipsilateral ear | Tympano after radiotherapy at contralateral ear | Tympano 12 weeks after radiotherapy at ipsilateral ear | Tympano 12 weeks after radiotherapy at contralateral ear |
|---|---|---|---|---|---|
60 GY | Bil type A 14 ears (23.3%) | A (normal) 4 (57.1%) B (effusion) 1 (14.3%) C (ETD) 2 (28.6%) | A (normal) 5 (71.4%) B (effusion) 0 (0%) C (ETD) 2 (28.6%) | A (normal) 5 (71.4%) B (effusion) 1 (14.3%) C (ETD) 1 (14.3%) | A (normal) 7 (100%) B (effusion) 0 (0%) C (ETD) 0 (0%) |
66 GY | Bil type A 28 ears (46.7%) | A (normal) 6 (42.9%) B (effusion) 2 (14.2%) C (ETD) 6 (42.9%) | A (normal) 10 (71.4%) B (effusion) 1 (7.1%) C (ETD) 3 (21.3%) | A (normal) 9 (64.4%) B (effusion) 1 (7.1%) C (ETD) 4 (28.5%) | A (normal) 11 (78.7%) B (effusion) 1 (7.1%) C (ETD) 2 (14.2%) |
70 GY | Bil type A 18 ears (30%) | A (normal) 4 (44.5%) B (effusion) 3 (33.3%) C (ETD) 2 (22.2%) | A (normal) 7 (77.8%) B (effusion) 1 (11.1) C (ETD) 1 (11.1%) | A (normal) 8 (88.9%) B (effusion) 0 (0%) C (ETD) 1 (11.1%) | A (normal) 7 (77.8%) B (effusion) 1 (11.1%) C (ETD) 1 (11.1%) |