Publications by authors named "Douglas C Bigelow"

 Spontaneous temporal encephaloceles (STEs) are increasingly recognized as sequelae of idiopathic intracranial hypertension (IIH), which in turn may further complicate their management. We endeavored to review the University of Pennsylvania institutional experience on operative management of STEs, with a focus on factors which may influence surgical outcomes, particularly IIH.  Retrospective chart review over 9 years from 2013 to 2022.

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Article Synopsis
  • - **Study Purpose**: The research aimed to analyze the relationship between the monoclonal antibody teprotumumab and hearing loss, reviewing existing evidence about its ototoxic effects.
  • - **Data Review Process**: A systematic review included 7 studies focusing on 109 patients who received teprotumumab, while excluding non-relevant articles and those lacking comprehensive audiometric data.
  • - **Findings and Conclusion**: Ototoxicity was identified in 41% of patients, mainly affecting higher frequency hearing. Enhanced screening for hearing issues is suggested, but the exact occurrence rate is still unclear, highlighting the need for further research.
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Objective: Decisions around the diagnostic evaluation for pulsatile tinnitus (PT) remain challenging. We describe the usage patterns and diagnostic accuracy of imaging modalities and propose an evidence-based diagnostic approach for undifferentiated PT.

Study Design: Retrospective.

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Vestibular schwannomas (VS) are the most common tumor of the skull base with available treatment options that carry a risk of iatrogenic injury to the facial nerve, which can significantly impact patients' quality of life. As facial nerve outcomes remain challenging to prognosticate, we endeavored to utilize machine learning to decipher predictive factors relevant to facial nerve outcomes following microsurgical resection of VS. A database of patient-, tumor- and surgery-specific features was constructed via retrospective chart review of 242 consecutive patients who underwent microsurgical resection of VS over a 7-year study period.

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Objective: The objective of this study is to assess diagnostic yield of imaging modalities used to evaluate patients presenting with pulsatile tinnitus (PT).

Databases Reviewed: PubMed, Embase, and Scopus were queried using the search terms "pulsatile tinnitus," "pulse-synchronous tinnitus," and "pulse synchronous tinnitus" with no date limitations.

Methods: Studies that reported diagnostic imaging for patients presenting with PT were included.

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Introduction: Gentamicin is a vestibulotoxic antibiotic often used in patients with Ménière's disease for its vestibular ablative effects. Gentamicin's effect on the horizontal semicircular canal does not always correlate with the degree of vertigo control achieved by patients; its effect on the vertical semicircular canals remains unknown. We sought to examine the effect of intratympanic gentamicin on vertical semicircular canal function in patients with Ménière's disease using video head impulse testing.

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Objective: The role of surgery in lateral skull base osteomyelitis (SBO) is controversial. Surgical intervention is often requested by consulting services in the interest of additional culture data to inform medical management. However, whether surgery alters subsequent antibiotic treatment or modifies disease outcome remains unknown.

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Objective: To characterize the estimated prevalence and clinicodemographic features of Ménière's disease (MD) using current diagnostic criteria.

Methods: A cross-sectional study was undertaken at our tertiary academic referral center. All patients seen in Otolaryngology clinic with ICD-10 diagnoses of MD, from January 1, 2013 to July 31, 2022 were identified.

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Objectives: Changes in vestibular function have been demonstrated following cochlear implantation (CI). The functional impact of these changes on CI performance has not been well-studied. We sought to assess whether caloric changes postimplantation could predict CI performance.

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Background: Socioeconomic variables including race, education, and income have been shown to affect vestibular schwannoma incidence, treatment, and outcomes. We sought to determine the impact of socioeconomic factors on quality of life at the time of vestibular schwannoma diagnosis.

Methods: Retrospective cohort study conducted at a tertiary academic center.

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Importance: Despite the sizeable global burden of hearing loss, cochlear implants have poor penetrance among eligible hearing-impaired individuals. Identifying populations who may benefit from a cochlear implant but among whom penetrance is poor is an important aim in reducing the health-related and economic effects of hearing loss on both individuals and society.

Objectives: To explore the association of socioeconomic status (SES) with cochlear implant candidacy and the decision to undergo cochlear implantation.

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Objective: To examine long-term (>5 yr) low-frequency hearing preservation after hybrid cochlear implantation.

Study Design: Retrospective cross-sectional study.

Setting: Tertiary care center outpatient clinic.

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Objective: Predictors of second-side cochlear implant performance have not been well studied. We sought to assess whether speech recognition scores from first-side cochlear implant (CI1) could predict second-side cochlear implant (CI2) scores in sequential bilaterally implanted adults.

Study Design: Retrospective review using a prospectively collected database.

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Background: Historically, stapedectomy complication rates are quoted as 1% profound postoperative sensorineural hearing loss (SNHL), 5%-10% nonprofound SNHL, and 5%-10% revision surgery.

Objective: We sought to reassess rates of post-stapedotomy complications based on our experience using contemporary surgical technique.

Methods: A retrospective case series was carried out at an academic tertiary referral center.

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Objective: To report the audiometric and surgical outcomes of a series of patients having undergone implantation of a novel transcutaneous bone conduction implant (t-BCI).

Study Design: Retrospective case series.

Setting: Single academic tertiary referral center.

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Cochlear implant electrode array misplacement is a rare but serious complication that may result in failure of hearing rehabilitation, non-auditory percepts, vestibular disturbance, or damage to adjacent neurovascular structures. We present a case of an elderly patient who suffered electrode array misplacement into the posterior semicircular canal, resulting in vestibular symptoms and severe downstream sequelae. The risk of misplacement may be higher in patients with a history of chronic otitis media or prior otologic surgery, and with the use of pre-curved electrode arrays.

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Purpose: Comparison of audiometric measurements of commercially available smartphone audiogram application thresholds as compared to gold standard audiometric evaluation.

Materials And Methods: A single-institution, original contribution. Ninety consecutive adult patients presenting to a tertiary care auditory clinic with auditory complaints were evaluated using standard audiometric testing and an application-based hearing test.

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Objective: To compare outcomes transmastoid repair of spontaneous middle fossa cerebrospinal fluid (CSF) leak using only bone cement (BC) versus only autologous material (AM) or combined materials (CM) with both bone cement and autologous material.

Study Design: Retrospective Chart Review.

Setting: Tertiary Care Hospital.

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We present an unusual case of chordoma arising entirely from the lateral skull base with imaging features suggestive of a paraganglioma. Clinical history, management, histopathology, and imaging characteristics are described, including a review of gallium-dotate PET scanning somatostatinreceptor-positive tumors. We further provide a review of management options, including a summary of our approach with surgical biopsy via retrosigmoid and resection via transtemporal approaches.

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Objective: To characterize differences in vestibular testing results among patients presenting with balance-related complaints; to stratify patterns of testing abnormalities by age.

Study Design: Retrospective chart review.

Setting: Academic Balance Center at a Tertiary Referral Center.

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Objective: To perform a systematic review of sensorineural hearing loss (SNHL) in hematologic malignancy; to describe an illustrative case of urgent cochlear implantation for bilateral profound SNHL and vestibular hypofunction in hyperviscosity syndrome; to suggest an approach to management of hyperviscosity syndrome-associated deafness with cochlear implantation.

Data Sources: Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, systematic search of PubMed and Embase databases was undertaken for articles detailing clinical information about SNHL caused directly by hematologic malignancies.

Results: A total of 37 studies from 1989 to 2020 were qualitatively reviewed, the majority of which were case studies or case series.

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Objective: To characterize postoperative electrode functionality after adult cochlear implantation; to identify rationale and risk factors for electrode deactivation.

Study Design: Retrospective Chart Review.

Setting: Academic Cochlear Implant Center.

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Objective: To identify redundancy in the cochlear implant candidacy evaluation and assess its financial impact.

Study Design: Retrospective chart review.

Setting: Tertiary care academic cochlear implant center.

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Objective: To assess the impact of reconstructive technique on the incidence of cerebrospinal fluid (CSF) leak following retrosigmoid approach to acoustic neuroma resection.

Study Design: Retrospective case series.

Setting: Academic medical center.

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Objective: To evaluate the presence of bitter taste receptors (T2Rs) in the middle ear and to examine their relationship with chronic ear infections.

Study Design: Cross-sectional study.

Setting: Tertiary care hospital.

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