Issue 2 Probability of Achieving Binaural Hearing and the Stability of Hearing over Time

No one would argue that surgery for congenital aural atresia has the same potential for hearing restoration as does stapedec-tomy; few middle ear procedures involving the middle ear ossicles do. But is the success rate so modest that unilateral cases are best observed, at least until the individual is an adult and can make his or her own decision?

Within the first postoperative year, a hearing level of >30 dB has been achievable in approximately 70% of patients8-13 (Table 70-1). This degree of success compares favorably with

TABLE 70-1

Aural Atresia: Hearing Status during the First Postoperative Year

TABLE 70-1

Aural Atresia: Hearing Status during the First Postoperative Year

Source / Year

No. of Patients

Hearing Parameter

Success (%)

Nager and Levin (1980)8

23

Hearing level < 30 dB

70

Bellucci (1981)9

45

Hearing level < 30 dB

73

De la Cruz et al. (1985)10

56

Conductive deficit < 30 dB

73

Schuknecht (1989)11

30

Hearing Level < 30 dB

50

Jahrsdoerfer et al. (1992)12

86

Hearing level < 25 dB

71

Lambert (1998)13

50

SRT <25 dB

60

SRT <30 dB

70

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