Oliver F Adunka

Oliver F Adunka
The Ohio State University | OSU · Department of Otolaryngology - Head & Neck Surgery

MD, FACS

About

194
Publications
21,536
Reads
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5,235
Citations
Additional affiliations
October 2014 - present
The Ohio State University
Position
  • Professor (Full)
December 2010 - September 2014
University of North Carolina at Chapel Hill
Position
  • Professor (Associate)
July 2007 - November 2010
University of North Carolina at Chapel Hill
Position
  • Professor (Assistant)
Education
July 2005 - June 2007
University of North Carolina at Chapel Hill
Field of study
  • Otology/Neurotology/Lateral Skull Base Surgery
March 1999 - November 2004
Goethe-Universität Frankfurt am Main
Field of study
  • Otolaryngology Residency
September 1993 - March 1999
Medical University of Vienna
Field of study
  • Medicine

Publications

Publications (194)
Article
Objectives: To evaluate the utility of intracochlear electrocochleography (ECochG) monitoring during cochlear implant (CI) surgery on postoperative hearing preservation. Study design: Prospective, randomized clinical trial. Setting: Ten high-volume, tertiary care CI centers. Patients: Adult patients with sensorineural hearing loss meeting th...
Article
Objective: This study aimed to characterize time and spectral domain characteristics of the phoneme-evoked electrocochleography (ECochG) response and explore potential associations between the ECochG spectral content, word recognition scores (WRSs), residual hearing, and aging in normal and hearing-impaired listeners. Design: This was a prospect...
Article
Full-text available
Background cCMV infection is a major contributor to childhood neurologic and cognitive disabilities including sensorineural hearing loss (SNHL). Neonatal treatment with ganciclovir/valganciclovir improves hearing outcomes, but its impact on neurodevelopmental outcomes remains an important knowledge gap. We describe the neurodevelopmental outcomes o...
Article
Objectives: To compare intraoperative intracochlear electrocochleography (ECochG) with hearing preservation outcomes in cochlear implant (CI) subjects. Design: Intraoperative electrocochleography was performed in adult CI subjects who were recipients of Advanced Bionics' Bionics LLC precurved HiFocus MidScala or straight HiFocus SlimJ electrode...
Article
Objectives: Histologic reports of temporal bones of ears with vestibular schwannomas (VSs) have indicated findings of endolymphatic hydrops (ELH) in some cases. The main goal of this investigation was to test ears with VSs to determine if they exhibit electrophysiological characteristics similar to those of ears expected to experience ELH. Design:...
Article
Objective: To investigate the influence of the COVID-19 pandemic on operative practices of otology and neurotology providers internationally. Study design: Cross-sectional survey. Methods: A 78-question survey was distributed to otologists and neurotologists between May 12, 2020 and June 8, 2020 to assess the impact of the pandemic on surgical...
Article
Among the various cochlear implant systems approved by the Food and Drug Administration, current labeling for pediatric usage encompasses (1) bilateral profound bilateral sensorineural hearing loss in children aged 9 to 24 months and bilateral severe to profound sensorineural hearing loss in children older than 2 years; (2) use of appropriately fit...
Article
Full-text available
Objective: To determine when infants in the neonatal intensive care unit (NICU) have the first hearing screen performed, and thus inform targeted testing for cytomegalovirus (CMV)-related hearing loss. Study design: Retrospective review of electronic health records of infants admitted to a Level 4 outborn NICU and had a first hearing screen perf...
Article
Full-text available
Background Congenital cytomegalovirus (CMV) is the leading non-genetic cause of sensorineural hearing loss (SNHL) in children. While SNHL is often present at birth, as many as 25% of congenital CMV-infected infants may develop late-onset hearing loss. Antiviral therapy improves hearing outcomes, but its effect on the occurrence of late-onset SNHL i...
Article
Objectives: Electrocochleography (ECochG), obtained before the insertion of a cochlear implant (CI) array, provides a measure of residual cochlear function that accounts for a substantial portion of variability in postoperative speech perception outcomes in adults. It is postulated that subsequent surgical factors represent independent sources of...
Article
Objective: Tip fold-over is a rare but serious complication of cochlear implant (CI) surgery. The purpose of this study was to present intraoperative electrocochleography (ECochG) observations in a series of CI electrode tip fold-overs. Patients: Five pediatric subjects undergoing CI surgery through a round window (RW) approach with a perimodiol...
Article
Importance Cochlear implants are a treatment option for individuals with severe, profound, or moderate sloping to profound bilateral sensorineural hearing loss (SNHL) who receive little or no benefit from hearing aids; however, cochlear implantation in adults is still not routine. Objective To develop consensus statements regarding the use of unil...
Article
: This combined American Neurotology Society, American Otological Society, and American Academy of Otolaryngology - Head and Neck Surgery Foundation document aims to provide guidance during the coronavirus disease of 2019 (COVID-19) on 1) "priority" of care for otologic and neurotologic patients in the office and operating room, and 2) optimal util...
Article
Full-text available
The indications for cochlear implantation have gradually expanded as advancements in technology have evolved, resulting in improved audiologic outcomes for both adult and children. There remains a significant underutilization of cochlear implant technology in the United States, and recognition of the potential benefits of cochlear implantation for...
Article
Objectives: Intraoperative electrocochleography (ECochG) has provided insight regarding inner ear pathophysiology during neurotologic procedures. In this study, intraoperative ECochG findings are reported in patients who presented with episodic aural and vestibular symptoms during resection of posterior fossa neoplasms. Patients: Three patients...
Article
Objectives/Hypothesis Results from a prospective trial demonstrated better speech recognition for cochlear implant (CI) recipients implanted with a long lateral wall electrode array compared to subjects with a short array after 1 year of listening experience. As short array recipients may require an extended adaptation period, this study investigat...
Article
Full-text available
Background Congenital hearing loss is remarkably heterogeneous, with over 130 deafness genes and thousands of variants, making for innumerable genotype/phenotype combinations. Understanding both the pathophysiology of hearing loss and molecular site of lesion along the auditory pathway permits for significantly individualized counseling. Electrophy...
Article
Introduction The clinical implications of single-sided deafness (SSD) in children has historically been underappreciated by patients and providers alike, despite a large body of literature on the wide-ranging neurocognitive, language, scholastic, and functional impairments that occur. Conventional amplification options are marked by variable result...
Article
Objective: Given the heterogeneity of papers about electrocochleography (ECochG) and cochlear implantation (CI) and the absence of a systematic review in the current literature, the aim of this work was to analyze the uses of ECochG in the different stages of CI. Data Sources: A search of PubMed from inception to December 8, 2019, with cross-refere...
Article
Enlarged vestibular aqueduct (EVA) is the most frequent inner ear abnormality found on computed tomography in children with sensorineural hearing loss. The effects EVA abnormalities have on electrocochleography (ECochG) are unknown. Positive deflections in summation potential evoked by tone bursts were observed in 3/5 subjects, while a large negati...
Article
Full-text available
Current cochlear implants (CIs) are semi-implantable devices with an externally worn sound processor that hosts the microphone and sound processor. A fully implantable device, however, would ultimately be desirable as it would be of great benefit to recipients. While some prototypes have been designed and used in a few select cases, one main stumbl...
Article
Hypothesis: Intraoperative electrocochleography (ECochG) can differentiate hair cell and neural dysfunction caused by a vestibular schwannoma (VS) and help define the site of lesion as peripheral or central to the spiral ganglion. Background: Hearing loss in patients with a VS can be caused by both sensory (cochlear) and neural dysfunction. Met...
Article
A 15-year-old female presented for evaluation of progressive hearing loss over a year. Computed tomographic imaging revealed a 11 x 6 × 6 mm osseous lesion with 'groundglass' appearance within the left posterior petrous bone lateral to vestibular aqueduct suspicious for an endolymphatic sac tumor. Surgical excision revealed fibrous dysplasia on his...
Article
Full-text available
Background Congenital cytomegalovirus (cCMV) infection is the most common cause of non-genetic sensorineural hearing loss in infancy. Screening of newborns for cCMV infection has been performed utilizing saliva due to ease of collection and high sensitivity. Positive saliva screens for CMV DNA by polymerase chain reaction (PCR) testing has been rep...
Article
Full-text available
Background The diagnosis of congenital cytomegalovirus (cCMV) infection requires that CMV be detected in a body fluid before 3 weeks of age. After 3 weeks, a diagnosis of cCMV infection is difficult since one cannot differentiate between prenatal, natal, and postnatal CMV acquisition. Infants who refer on the newborn hearing screen often are diagno...
Article
Objective: To examine opioid prescribing patterns and consumption among patients undergoing common otologic surgeries. Study design: Retrospective cohort study with chart review and telephone survey. Setting: Tertiary academic medical center. Methods: Retrospective chart review and telephone survey of those undergoing tympanoplasty, tympanom...
Article
Objective The main purpose of this article is to determine if vestibular schwannoma consistency as determined by tissue intensity on T2-weighted magnetic resonance imagings (MRIs) is predictive of intraoperative experience and postoperative clinical outcomes. Study Design Retrospective chart review. Setting Tertiary referral center. Patients Sevent...
Article
Objective: We present a unique case of a patient with a jugular foramen tumor with serviceable hearing. This study discusses the audiometric results and intraoperative electrocochleographic (ECochG) findings recorded during tumor removal to illustrate the potential utility of this technique in skull base surgery. Patients: A 22-year-old female p...
Article
Objectives The goal of this review was to review our series of isolated malleus fixation in pediatric patients, a rare entity causing conductive hearing loss. Malleolar fixation is poorly described in this patient population. Methods A retrospective review of pediatric tympanoplasties by the senior author over a four-year period was performed. Onl...
Article
Objective To evaluate the prevalence of bilateral hearing loss in children with unilateral enlarged vestibular aqueduct (EVA) at a single institution. Methods A retrospective case review was performed at a tertiary care pediatric referral center involving children with radiologic findings of unilateral EVA and normal labyrinthine anatomy of the co...
Article
Objectives The optimal timing and technique for repairing chronic tympanic membrane (TM) perforations in pediatric patients remains controversial. The objectives are to determine the surgical and hearing outcomes of pediatric lateral graft tympanoplasty at a tertiary teaching hospital. Methods A retrospective review was conducted for pediatric lat...
Article
Full-text available
Hypothesis: Electrocochleography (ECochG) recorded during cochlear implant (CI) insertion from the apical electrode in conjunction with postinsertion ECochG can identify electrophysiologic differences that exist between groups with and without a translocation of the array from the scala tympani (ST) into the scala vestibuli (SV). Background: Tra...
Article
Objectives: Electrocochleography (ECochG) obtained through a cochlear implant (CI) is increasingly being tested as an intraoperative monitor during implantation with the goal of reducing surgical trauma. Reducing trauma should aid in preserving residual hearing and improve speech perception overall. The purpose of this study was to characterize in...
Article
Introduction Family-centered healthcare demands that families provide input regarding the care of their children. Very little is known, however, about how families perceive their experience in different types of multidisciplinary team models, and specifically, in the multidisciplinary setting currently utilized in many pediatric hearing clinics. M...
Article
Hypothesis: Electrocochleography (ECochG) patterns observed during cochlear implant (CI) electrode insertion may provide information about scalar location of the electrode array. Background: Conventional CI surgery is performed without actively monitoring auditory function and potential damage to intracochlear structures. The central hypothesis...
Article
Background: Surgical resection of vestibular schwannomas (VS) located within the internal auditory canal (IAC) is challenging, especially those located very laterally in the IAC. Various transcranial approaches have been described for resection of intracanlicular VS; including retrosigmoid, translabyrinthine, middle fossa approaches. Each approach...
Article
Full-text available
Objectives Increasing evidence suggests that hearing loss may be linked to cognitive decline, and that cochlear implantation may lead to improvements in cognition. The goal of this study was to examine the effects of severe‐to‐profound hearing loss and cochlear implantation in post‐lingually deafened adults, compared with age‐matched normal‐hearing...
Article
Objective: A quality improvement study was completed to assess the impact of three clinical practice changes on the timing of diagnosis and intervention for congenital hearing loss. Design: A retrospective chart review was conducted for 800 infants evaluated for congenital hearing loss before and after implementing three clinical practice change...
Article
Objectives: Variability in speech perception outcomes with cochlear implants remains largely unexplained. Recently, electrocochleography, or measurements of cochlear potentials in response to sound, has been used to assess residual cochlear function at the time of implantation. Our objective was to characterize the potentials recorded preimplantat...
Article
ABSTRACT Objectives/Hypothesis: Cochlear implants (CIs) restore auditory sensation to patients with moderate-to-profound sensorineural hearing loss. However, the benefits to speech recognition vary considerably among patients. Advancing age contributes to this variability in post-lingual adult CI users. Similarly, older individuals with normal hear...
Article
Objective: Multiple investigators have sought to identify risk factors for cerebrospinal fluid (CSF) leak following cerebellopontine angle (CPA) tumor resection. We evaluated whether pneumatization of the petrous apex (PA) is a risk factor for CSF fistula. Method: We conducted a retrospective chart review at 2 major tertiary academic institution...
Article
This article outlines new minimum standards for reporting adult cochlear implant outcomes. These standards have been endorsed by the Implantable Hearing Devices Committee and the Hearing Committee of the American Academy of Otolaryngology—Head and Neck Surgery. The lack of a standardized method for reporting outcomes following cochlear implantation...
Article
Objectives: Electrocochleography is increasingly being utilized as an intraoperative monitor of cochlear function during cochlear implantation (CI). Intracochlear recordings from the advancing electrode can be obtained through the device by on-board capabilities. However, such recordings may not be ideal as a monitor because the recording electrod...
Article
Full-text available
Objective: To demonstrate the safety and effectiveness of the MED-EL Electric-Acoustic Stimulation (EAS) System, for adults with residual low-frequency hearing and severe-to-profound hearing loss in the mid to high frequencies. Study design: Prospective, repeated measures. Setting: Multicenter, hospital. Patients: Seventy-three subjects impl...
Article
Hypotheses: 1) When controlling for age in postlingual adult cochlear implant (CI) users, information-processing functions, as assessed using "process" measures of working memory capacity, inhibitory control, information-processing speed, and fluid reasoning, will predict traditional "product" outcome measures of speech recognition. 2) Demographic...
Article
Full-text available
Objectives: To provide multidisciplinary cochlear implant teams with a current consensus statement to support hearing preservation cochlear implantation (HPCI) in children, including those children with symptomatic partial deafness (PD) where the intention is to use electric-acoustic stimulation (EAS). The main objectives are to provide guidelines...
Article
Full-text available
Background Congenital CMV infection is the leading cause of non-genetic sensorineural hearing loss in infancy. Antiviral therapy has been shown to improve hearing outcomes, and thus “targeted” CMV screening for newborns who do not pass the hearing screen has been recommended. Diagnosis of congenital CMV infection requires that the infant be tested...
Article
Hypothesis: Intraoperative, intracochlear electrocochleography (ECochG) will provide a means to monitor cochlear hair cell and neural response during cochlear implant (CI) electrode insertion. Distinct patterns in the insertion track can be characterized. Background: Conventional CI surgery is performed without a means of actively monitoring coc...
Article
Full-text available
Objectives Neurocognitive functions contribute to speech recognition in postlingual adults with cochlear implants (CIs). In particular, better verbal working memory (WM) on modality‐specific (auditory) WM tasks predicts better speech recognition. It remains unclear, however, whether this association can be attributed to basic underlying modality‐ge...
Article
Full-text available
Auditory neuropathy spectrum disorder (ANSD) is characterized by an apparent discrepancy between measures of cochlear and neural function based on auditory brainstem response (ABR) testing. Clinical indicators of ANSD are a present cochlear microphonic (CM) with small or absent wave V. Many identified ANSD patients have speech impairment severe eno...
Article
Objectives: To assess electrocochleography (ECochG) to tones as an instrument to account for CI speech perception outcomes in children with auditory neuropathy spectrum disorder (ANSD). Materials & methods: Children (<18 years) receiving CIs for ANSD (n = 30) and non-ANSD (n = 74) etiologies of hearing loss were evaluated with ECochG using tone...
Article
Observation, stereotactic radiosurgery, and microsurgical resection comprise the conventional armamentarium in the management of vestibular schwannomas (VSs).¹ The potential to “cure,” as opposed to control tumor growth, is unique to microsurgical resection.
Article
Hypothesis: Utilizing the cochlear implant to record electrophysiologic responses during device placement is a feasible and efficacious technique for monitoring near real-time cochlear physiology during and following electrode insertion. Background: Minimizing intracochlear trauma during cochlear implantation has emerged as a highly researched a...
Article
Full-text available
Objective: To determine if cerebellopontine angle vestibular schwannoma consistency and adherence predicted by magnetic resonance imaging correlates with intraoperative experience and clinical outcomes post-surgical resection. Hypothesis: Tumors determined to be firm and/or adherent radiographically are associated with more challenging surgical res...
Article
Objective Ménière’s disease affects the vestibular and audiologic systems; however, little is known about the relationship between audiometric and caloric function with increasing duration of disease. We employed a novel methodology to understand the longitudinal correlation between audiometric and caloric function in Ménière’s patients. Study Des...
Article
Objectives: Intraoperative electrocochleography (ECochG) provides valuable information regarding inner ear function during surgical procedures. Here, we report findings from ECochG collected at three time intervals during the management of a patient with symptoms of inner ear hydrops. Patients: A 38-year-old man with an endolymphatic sac tumor w...
Article
Hypothesis: The compound action potential (CAP) is a purely neural component of the cochlea's response to sound, and may provide information regarding the existing neural substrate in cochlear implant (CI) subjects that can help account for variance in speech perception outcomes. Background: Measurement of the "total response" (TR), or sum of th...
Chapter
Cochlear nerve deficiency (CND) is defined as a small or absent cochlear nerve. It is most often diagnosed in the setting of congenital sensorineural hearing loss and represents around 1 % of cases within this population. It is associated with a recognized syndrome in 30–50 % of cases, most commonly CHARGE syndrome. Treatment planning requires a co...
Book
N.M. Young, K. Iler Kirk (Eds.) Pediatric Cochlear Implantation ▶ Educates clinicians in the field of pediatric cochlear im-plantation as to the current and emerging best practices ▶ Expands upon the current literature regarding the role of cognition and executive function in pediatric cochlear implant outcomes ▶ Aimed at neurotologists and pediatr...
Article
Objective: Unexplained outcome variability exists among adults with cochlear implants (CIs). Two significant predictors are age and duration of deafness, with older patients and those with longer durations of deafness generally demonstrating poorer speech recognition. However, these factors are often highly correlated. Thus, it is unclear whether...
Article
Full-text available
Objectives: To determine the influence of posterior fossa dimensions on surgical outcomes after vestibular schwannoma management. Study design: Retrospective chart review. Setting: Tertiary care academic medical center. Patients: Patients with sporadic vestibular schwannomas who underwent surgical resection via retrosigmoid or translabyrinth...
Article
Objectives/hypothesis: To determine if prolongation of the interdevice interval in children receiving bilateral cochlear implants adversely affects speech perception outcomes. Study design: Retrospective chart review. Methods: Retrospective review of our pediatric cochlear implant database was performed. Children who had undergone revision sur...
Article
Purpose: The goal of this work was to better understand speech perception for cochlear implant (CI) users with bilateral residual hearing, including consideration of effects related to listening conditions and test measures. Of interest was the role of acoustic hearing for speech perception in a complex background, the role of listening experience...
Article
Candidacy criteria for cochlear implantation are expanding to include patients with substantial low-to-mid frequency hearing sensitivity. Postoperative hearing preservation has been achieved in cochlear implant recipients, though with variable outcomes. Previous investigations on postoperative hearing preservation outcomes have evaluated intraopera...
Article
Objective/HypothesisPrevious reports have documented the feasibility of utilizing electrocochleographic (ECoG) responses to acoustic signals to assess trauma caused during cochlear implantation. The hypothesis is that intraoperative round window ECoG before and after electrode insertion will help predict postoperative hearing preservation outcomes...
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Full-text available
Bone conduction implants are useful in patients with conductive and mixed hearing loss for whom conventional surgery or hearing aids are no longer an option. They may also be used in patients affected by single-sided deafness. To establish a consensus on the quality standards required for centers willing to create a bone conduction implant program....
Article
Objectives: Determine if routine computed tomography (CT) imaging is necessary in the workup for children with connexin-related (DFNB1) sensorineural hearing loss (SNHL). Study design: Case-control retrospective chart and imaging review. Setting: Tertiary care otolaryngology practice. Subjects and methods: High-resolution temporal bone CT sc...
Article
To determine if spatial orientation of the cochlea within the temporal bone is related to age or sensorineural hearing loss (SNHL) and describe the implications for cochlear implantation. Five angles of cochlear orientation were determined from computed tomography (CT) imaging of the temporal bones in adults with (n = 55) and without (n = 27) senso...