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Otology & Neurotology Open
Number of Followers: 10  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 2766-3604
Published by LWW Wolters Kluwer Homepage  [297 journals]
  • A 3D Printed Human Ear Model for Standardized Testing of Hearing
           Protection Devices to Blast Exposure

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      Authors: Brown; Marcus A.; Jiang, Shangyuan; Gan, Rong Z.
      Abstract: imageHypothesis: A 3D printed human temporal bone (TB) that is anatomically accurate would cost-effectively reproduce the responses observed in blast testing of human cadaveric TBs with and without passive hearing protection devices (HPDs).Background: HPDs have become critical personal protection equipment against auditory damage for service members. Acoustic test fixtures and human TBs have been used to test and develop HPDs; however, the lack of a cost-effective, standardized model impedes the improvement of HPDs.Methods: In this study, the 3D printed TB model was printed with flexible and rigid polymers and consisted of the ear canal, tympanic membrane (TM), ossicular chain, middle ear suspensory ligaments/muscle tendons, and middle ear cavity. The TM movement under acoustic stimulation was measured with laser Doppler vibrometry. The TB model was then exposed to blasts with or without HPDs and pressures at the ear canal entrance (P0) and near the TM in the ear canal (P1) were recorded. All results were compared with that measured in human TBs.Results: Results indicated that in the 3D printed TB, the attenuated peak pressures at P1 induced by HPDs ranged from 0.92 to 1.06 psi (170–171 dB) with blast peak pressures of 5.62–6.54 psi (186–187 dB) at P0, and measured results were within the mean and SD of published data. Vibrometry measurements also followed a similar trend as the published results.Conclusions: The 3D printed TB model accurately evaluated passive HPDs’ protective function during blast and the potential for use as a model for acoustic transmission was investigated.
      PubDate: Wed, 01 Jun 2022 00:00:00 GMT-
       
  • Incidence of Concomitant Semicircular Canal Dehiscence With Otosclerosis

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      Authors: Walker; Brian A.; Thorwarth, Ryan M.; Stull, Lindsey L.; Hoxworth, Joseph M.; Deep, Nicholas L.; Weisskopf, Peter A.
      Abstract: imageObjective: The concurrence of otosclerosis and superior semicircular canal dehiscence (SSCD) presents a diagnostic challenge and failure to differentiate between these 2 diagnoses results in mischaracterization and unsuccessful surgery. The objective of this study is to identify the incidence of SSCD in patients who have computed tomography (CT) evidence of otosclerosis.Study Design: Retrospective chart review.Setting: Tertiary referral hospital.Patients: Adults with CT scan of the temporal bone diagnosed with radiological unilateral or bilateral fenestral otosclerosis from January 1995 to April 2018.Methods: Retrospective review of patient imaging from a multi-center tertiary-referral health system from January 1995 to April 2018. Imaging was reviewed to quantify the incidence of SSCD among patients with CT-diagnosed bilateral fenestral otosclerosis. Poor quality imaging was excluded from review.Results: One-thousand two-hundred eight patients (1214 CT scans) were identified with otosclerosis, of which 373 were diagnosed with fenestral otosclerosis (663 ears) with imaging of sufficient quality for review. This population was predominantly female (57.2%) with bilateral fenestral otosclerosis (78%). Of these, 23 ears (3.5%) had definitive evidence of SSCD, with an additional 15 ears (2.3%) with possible radiographic evidence of SSCD. There was no significant difference in laterality between the SSCD and otosclerosis.Conclusions: Among 373 patients with fenestral otosclerosis per CT temporal bone imaging at a tertiary referral hospital, as many as 8.3% of patients had radiographic evidence of SSCD. Given this incidence, it continues to be important to consider SSCD when diagnosing and treating otosclerosis.
      PubDate: Wed, 01 Jun 2022 00:00:00 GMT-
       
  • Guidelines for Best Practice in the Audiological Management of Adults
           Using Bimodal Hearing Configurations

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      Authors: Holder; Jourdan T.; Holcomb, Meredith A.; Snapp, Hillary; Labadie, Robert F.; Vroegop, Jantien; Rocca, Christine; Elgandy, Mohamed Salah; Dunn, Camille; Gifford, René H.
      Abstract: Clinics are treating a growing number of patients with greater amounts of residual hearing. These patients often benefit from a bimodal hearing configuration in which acoustic input from a hearing aid on 1 ear is combined with electrical stimulation from a cochlear implant on the other ear. The current guidelines aim to review the literature and provide best practice recommendations for the evaluation and treatment of individuals with bilateral sensorineural hearing loss who may benefit from bimodal hearing configurations. Specifically, the guidelines review: benefits of bimodal listening, preoperative and postoperative cochlear implant evaluation and programming, bimodal hearing aid fitting, contralateral routing of signal considerations, bimodal treatment for tinnitus, and aural rehabilitation recommendations.
      PubDate: Wed, 01 Jun 2022 00:00:00 GMT-
       
 
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