Publications by authors named "Alexandra Bourdillon"

Microglia take on an altered morphology during chronic opioid treatment. This morphological change is broadly used to identify the activated microglial state associated with opioid side effects, including tolerance and opioid-induced hyperalgesia (OIH). Microglia display similar morphological responses in the spinal cord after peripheral nerve injury (PNI).

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The role of computer vision in extracting radiographic (radiomics) and histopathologic (pathognomics) features is an extension of molecular biomarkers that have been foundational to our understanding across the spectrum of head and neck disorders. Especially within head and neck cancers, machine learning and deep learning applications have yielded advances in the characterization of tumor features, nodal features, and various outcomes. This review aims to overview the landscape of radiomic and pathognomic applications, informing future work to address gaps.

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The cause of sudden conductive loss in the absences of other vestibulo-audiologic abnormalities can be isolated to specific subsites of the ossicular chain using audiometric testing. In the absence of such abnormalities, a rare etiology may be the cause after an inciting trauma. Laryngoscope, 134:4344-4346, 2024.

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Objective: We examined process-related quality metrics for oral squamous cell carcinoma (OSCC) depending on treating facility type across a health system and region.

Study Design: Retrospective in accordance with Strengthening the Reporting of Observational Studies in Epidemiology guidelines.

Setting: Single health system and region.

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Purpose: To understand the utility of circulating tumor human papillomavirus DNA (ctHPVDNA) blood testing for HPV-associated oropharynx squamous cell carcinoma (HPV + OPSCC) after definitive surgery.

Materials And Methods: Prospective cohort study of HPV(+)OPSCC patients with ctHPVDNA test data to assess its accuracy in detecting biopsy-confirmed disease at various post-treatment time points. Eligible patients had p16(+)/HPV(+) OPSCC and ctHPVDNA testing performed at any time pre-operatively and/or postoperatively.

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With the increasing consolidation of physician practices, private equity (PE) firms have been playing a growing role in healthcare delivery and recently began entering the otolaryngology-head and neck surgery space. To date, no studies have examined the extent of PE investment in otolaryngology. We assessed trends and geographic distribution of US otolaryngology practices acquired by PE using Pitchbook (Seattle, WA), a comprehensive market database.

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Purpose: We examine prevalence, characteristics, quality of life (QOL) assessments, and long-term effects of interventions for laryngeal dysfunction after recovery from COVID-19 infection.

Materials And Methods: 653 patients presenting to Yale's COVID clinic from April 2020 to August 2021 were identified retrospectively. Patients with PCR-positive COVID-19 who underwent evaluation by fellowship-trained laryngologists were included.

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Objective(s): We aimed to develop a machine learning (ML) model to accurately predict the timing of oral squamous cell carcinoma (OSCC) recurrence across four 1-year intervals.

Methods: Patients with surgically treated OSCC between 2012-2018 were retrospectively identified from the Yale-New Haven Health system tumor registry. Patients with known recurrence or minimum follow-up of 24 months from surgery were included.

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Objective: To evaluate the 2020 to 2021 Otolaryngology residency application cycle in the context of recent trends.

Study Design: Retrospective data analysis.

Setting: Disruptions caused by the COVID-19 pandemic may significantly alter trends among residency applicants, especially in highly competitive and/or smaller specialties.

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Objectives: Laryngotracheal trauma is poorly studied and associated with serious morbidity and mortality. This study reports features associated with laryngotracheal fractures, and factors associated with laryngeal fracture repair.

Study Design: Retrospective database study SETTING: American College of Surgeons Trauma Quality Improvement Program (ACS-TQIP®) METHODS: ACS-TQIP® 2014-2015 participant user data files were queried for laryngotracheal fractures using the International Classification of Diseases (ICD) 9 edition encodings.

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Background: Trapezial pommel, or ulnar osteophyte positioned at the vertex of the saddle-shaped facet, is a consistent structural appearance in osteoarthritis (OA) of the first carpometacarpal. This study investigates its relation to radiographic measures (modified Eaton staging and thumb OA [ThOA] index) and wear patterns (trapezial surface morphology and cartilaginous eburnation).

Methods: In all, 137 whole trapezia were explanted from 116 patients and evaluated for Eaton staging, morphology (saddle, cirque, or dish), and eburnation (degree of cartilaginous effacement) of the articular surface of the trapezium.

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The revolutions in AI hold tremendous capacity to augment human achievements in surgery, but robust integration of deep learning algorithms with high-fidelity surgical simulation remains a challenge. We present a novel application of reinforcement learning (RL) for automating surgical maneuvers in a graphical simulation. In the Unity3D game engine, the Machine Learning-Agents package was integrated with the NVIDIA FleX particle simulator for developing autonomously behaving RL-trained scissors.

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Objective(s): Subglottic stenosis (SGS) represents a constellation of diverse pathologic processes that ultimately lead to narrowing of the subglottic region and can produce significant morbidity. Existing endoscopic and radiographic assessments may not be consistent in practice.

Methods: Severity of stenosis was evaluated and reported using the Cotton-Myer classification system from 33 endoscopic procedures from 32 unique subjects.

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Objectives: Esophageal dilation (ED) may be performed in the office under local anesthesia or in a procedure/operating room under general anesthesia or intravenous (IV) sedation. However, indications for type of anesthesia during these procedures have not been established. The purpose of this review is to assess outcomes of esophageal dilation performed using different types of anesthesia to assess the safety of office-based techniques.

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This cross-sectional study examines demographic, clinical, and mortality trends of law enforcement–related traumatic injuries using 2014 to 2016 data from the Trauma Quality Improvement Program.

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Objectives: Failures in communication are a leading contributor to medical error. There is increasing attention on cultivating robust communication practices in the Operating Room (OR) to mitigate against patient injury and optimize efficient patient care. Few studies have evaluated how surgical equipment may introduce barriers to team dynamics.

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Sports-related injuries contribute to a considerable proportion of pediatric and adolescent craniofacial trauma, which can have severe and longstanding consequences on physical and mental health. The growing popularity of sports within this at-risk group warrants further characterization of such injuries in order to enhance management and prevention strategies. In this study, the authors summarized key trends in 1452 sports-related injuries among individuals aged 16 to 19 using the American College of Surgeon's Trauma Quality Improvement Program database from 2014 to 2016.

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Objective: Probiotics have garnered considerable attention as an intervention for various conditions common to otolaryngology. The purpose of this review is to evaluate the current literature to offer recommendations about the safety and efficacy of probiotic management in otolaryngologic conditions.

Study Design: Narrative review.

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Objectives: Endocannabinoid pathways have been proposed to affect the underlying pathophysiology of tinnitus. The aim of this study is to evaluate the scope and findings of existing literature on the relationship between and cannabinoid pathways and tinnitus.

Methods: We conducted a review of animal, clinical and survey studies investigating the relationship between the use of -derived agents and tinnitus.

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Papillary muscles serve as attachment points for chordae tendineae which anchor and position mitral valve leaflets for proper coaptation. As the ventricle contracts, the papillary muscles translate and rotate, impacting chordae and leaflet kinematics; this motion can be significantly affected in a diseased heart. In heart simulation, an explanted valve is subjected to physiologic conditions and can be adapted to mimic a disease state, thus providing a valuable tool to quantitatively analyse biomechanics and optimize surgical valve repair.

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Background: The optimal age for cleft palate repair continues to be debated, with little discussion of surgical risk related to operative timing. This study of 3088 cleft palate patients analyzed the impact of surgical timing on perioperative and 30-day postoperative outcomes.

Methods: Primary cleft palate repairs were identified in the National Surgical Quality Improvement Program database from 2012 to 2015.

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Objective: The aim of the study was to characterize the epidemiology and treatment outcomes of head and neck (HN) osseous-site tumors.

Methods: Descriptive analyses and multivariate Cox regressions were performed to analyze the effect of surgery on overall survival (OS) utilizing the National Cancer Database (2004-2016).

Results: Of 2449 tumors, surgery was utilized in 84.

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Aims: We have shown that extracellular vesicles (EVs) secreted by embryonic stem cell-derived cardiovascular progenitor cells (Pg) recapitulate the therapeutic effects of their parent cells in a mouse model of chronic heart failure (CHF). Our objectives are to investigate whether EV released by more readily available cell sources are therapeutic, whether their effectiveness is influenced by the differentiation state of the secreting cell, and through which mechanisms they act.

Methods And Results: The total EV secreted by human induced pluripotent stem cell-derived cardiovascular progenitors (iPSC-Pg) and human induced pluripotent stem cell-derived cardiomyocytes (iPSC-CM) were isolated by ultracentrifugation and characterized by Nanoparticle Tracking Analysis, western blot, and cryo-electron microscopy.

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