High-resolution computed tomography in evaluation of cochlear patency in implant candidates: a comparison with surgical findings
- 1 September 1994
- journal article
- research article
- Published by Cambridge University Press (CUP) in The Journal of Laryngology & Otology
- Vol. 108 (9) , 743-748
- https://doi.org/10.1017/s0022215100128002
Abstract
High-resolution computed tomography (HRCT) is important in the evaluation of cochlear implant candidates. This study examines the accuracy of radiological assessment of cochlear patency in relation to findings at the time of surgery. Older and newer HRCT methods and attending and senior radiologist interpretations are compared in a large series of cochlear implant patients. Subjects were 50 adults (22 to 74 years) and 31 children (2.4 to 11.7 years) who received either a 3M/House or a Nucleus 22-channel cochlear implant. Attending radiologist reports were obtained by chart review and the scans were re-reviewed for this study by a senior radiologist. Accuracy in detecting cochlear ossification ranged from 86.4 per cent for attending radiologists, with all HRCT scans, to 94.7 per cent for the senior radiologist with newer HRCT scans. False positives were rare, but false negatives did occur. Overall, best results were obtained with newer HRCT scans and a senior radiologist. Knowledge of the presence and extent of cochlear ossification is important to the implant surgeon and for patient counselling. Technical guidelines and a check list for interpretation of results are presented.Keywords
This publication has 11 references indexed in Scilit:
- Fast spin-echo high-resolution MR imaging of the inner ear.American Journal of Roentgenology, 1992
- Labyrinthitis ossificans: Histopathologic consideration for cochlear implantationOtolaryngology -- Head and Neck Surgery, 1991
- Labyrinthine Ossification after Meningitis: Its Implications for Cochlear ImplantationOtolaryngology -- Head and Neck Surgery, 1990
- Computed tomography: How accurate a predictor for cochlear implantation?The Laryngoscope, 1990
- Trends in Rehabilitation After Cochlear ImplantationJAMA Otolaryngology–Head & Neck Surgery, 1990
- The Narrow Internal Auditory Canal in Children: A Contraindication to Cochlear ImplantsOtolaryngology -- Head and Neck Surgery, 1989
- Multichannel Cochlear Implants in Partially Ossified CochleasAnnals of Otology, Rhinology & Laryngology, 1988
- Demographics of Meningitis-Induced Hearing Impairment: Implications for Immunization of Children Against Hemophilus Influenzae Type BAmerican Annals of the Deaf, 1987
- Congenital malformations of the inner ear: A classification based on embryogenesisThe Laryngoscope, 1987
- Sound detection with the cochlear implant in five ears of four children with congenital malformations of the cochleaThe Laryngoscope, 1987