Patient

Etiology

Mean hearing level pre-CI (dB HL)

Mean hearing level after revisional surgery (dB HL)

1

Meningitis

116.25

41.25

2

Meningitis

111.25

40

3

Surgical trauma (pineal tumor removal)

120

25

4

Idiopathic progressive

101.25

36.25

5

Idiopathic progressive

98.75

30

6

Trauma

106.25

25

7

Otosclerosis

120

25

8

Idiopathic progressive

116.25

23.75

9

Trauma

114.37

38.75

10

Ototoxicity

120

46.25

Mean hearing level

112.4 ± 7.9

33.1 ± 8.3