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Incus footplate assembly: Indication and surgical outcome
Author(s) -
Park Mina,
Han Sungjun,
Choi Byung Yoon,
Chang Sun O,
Kim Chong Sun,
Koo JaWon
Publication year - 2016
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1002/lary.25908
Subject(s) - footplate , incus , medicine , stapes , conductive hearing loss , surgery , middle ear , mechanical engineering , engineering
Objectives/Hypothesis To review surgical findings and hearing outcomes of incus footplate assembly (IFA) for the patients with conductive hearing loss due to missing stapes superstructure with a mobile stapes footplate. Study Design Retrospective case review and survey. Methods Pre‐ and postoperative audiometric data and intraoperative findings were reviewed. Postoperative air‐bone gap (ABG) and ABG closure (postoperative air‐conduction threshold–preoperative bone‐conduction threshold) were analyzed. Results The causes of missing stapes superstructure and conductive hearing loss were congenital ossicular anomaly (n = 5), chronic otitis media (n = 2), and congenital cholesteatoma (n = 1). The prosthesis was designed to fit between the medial side of the incus and stapes footplate and had a mean length of 3.6 ± 0.5 mm. The mean pre‐ and postoperative ABG were 38.3 ± 4.8 and 13.3 ± 10.0 dB, respectively. The postoperative ABG at frequencies of 0.25, 0.5, 1.0, 2.0, 3.0, and 4.0 kHz were 20.0 ± 15.4, 16.9 ± 11.9, 16.3 ± 10.3, 10.6 ± 7.3, 12.9 ± 14.0, and 23.1 ± 16.2 dB, respectively. The mean ABG closure was 9.5 dB (range, −1.3∼35.8 dB). Seven cases obtained the best results (mean ABG closure ≤10 dB). In the remaining patient, the mean ABG closure was 9.5 dB until 6 months after surgery, but was 35.8 dB 1 year after surgery. Conclusions IFA seems to be a reasonable surgical option in patients with missing the stapes superstructure, but with a mobile footplate in which the long process of incus is preserved. Level of Evidence 4 Laryngoscope , 126:2569–2573, 2016