Publications by authors named "Kevin Zhan"

Objective: To assess whether postoperative speech recognition after cochlear implantation (CI) differ between age groups of 80 to 89 and 90+.

Study Design: Retrospective cohort study.

Setting: Tertiary academic referral center.

View Article and Find Full Text PDF

Objective: Health policies affect clinical practice and outcomes, serving as an impetus for civic engagement. Voting participation among Otolaryngology-Head and Neck Surgery (OHNS) trainees is poorly characterized and may be afflicted by distinct barriers specific to training. This is the first study to evaluate voter participation among OHNS trainees.

View Article and Find Full Text PDF

 Cerebellopontine angle (CPA) tumors frequently present with hearing loss, which influences whether a hearing-preservation versus hearing ablative surgical approach is chosen. We discuss a case of complete hearing recovery after resection of a jugular foramen schwannoma (JFS) in a patient who also had a small intracanalicular vestibular schwannoma (VS).  A 46-year-old woman presented with left ear fullness, tinnitus, and imbalance for 9 months.

View Article and Find Full Text PDF

Patients on chronic anticoagulation undergoing metabolic surgery represent an increased risk of complications, including both bleeding and thrombotic events, such as deep vein thrombosis (DVT) and pulmonary embolism (PE). The optimal perioperative management of patients who are receiving chronic anticoagulation therapy (CAT) is complex. In the colorectal surgery literature, patients on CAT have a 10% rate of peri-procedural bleeding and a 3% rate of thromboembolism.

View Article and Find Full Text PDF

Objectives: Hispanic/Latino adults are less likely than non-Hispanic White adults to seek treatment for hearing disability. While differential socioeconomic factors may contribute to this finding, differences in phonology and syntax in the Spanish, versus English, language may also influence patient perception of hearing disability. The objective of this study is to investigate the association between primary language spoken and participant perception of hearing disability.

View Article and Find Full Text PDF

Objective: This study investigated the comparative performance of ear, nose, and throat (ENT) physicians in correctly detecting ear abnormalities when reviewing digital otoscopy imaging using 3 different visualization methods, including computer-assisted composite images called "SelectStitch," single video frame "Still" images, and video clips. The study also explored clinicians' diagnostic confidence levels and the time to make a diagnosis.

Study Design: Clinician diagnostic reader study.

View Article and Find Full Text PDF

Cell migration is the major driver of invasion and metastasis during cancer progression. For cells to migrate, they utilize the actin-myosin cytoskeleton and adhesion molecules, such as integrins and CD44, to generate traction forces in their environment. CD44 primarily binds to hyaluronic acid (HA) and integrins primarily bind to extracellular matrix (ECM) proteins such as collagen.

View Article and Find Full Text PDF

Liposarcomas are the most common soft tissue sarcoma in adults, whereas liposarcomas of the head and neck, particularly the hypopharynx, are incredibly rare - with approximately 50 cases reported in the literature. We present a case of an otherwise healthy and asymptomatic 42-year-old male who presented dramatically after vomiting up a large soft tissue mass. The lesion was surgically removed via transoral approach with blue laser, and diagnosis of well-differentiated liposarcoma was made via MDM2 gene amplification by FISH.

View Article and Find Full Text PDF

Objective: Age-related hearing loss (ARHL) is a prevalent but often underdiagnosed and undertreated condition among individuals aged 50 and above. It is associated with various sociodemographic factors and health risks including dementia, depression, cardiovascular disease, and falls. While the causes of ARHL and its downstream effects are well defined, there is a lack of priority placed by clinicians as well as guidance regarding the identification, education, and management of this condition.

View Article and Find Full Text PDF
Article Synopsis
  • - Age-related hearing loss (ARHL) is common but often goes undiagnosed in people over 50, leading to risks like dementia and falls, and there is a significant need for improved clinical focus on this issue.
  • - The clinical practice guideline aims to improve the identification and management of ARHL by providing evidence-based recommendations for clinicians, targeting individuals aged 50 and older.
  • - Key action statements emphasize the importance of screening for hearing loss, obtaining audiograms, offering appropriately fitted amplification, and evaluating candidates for cochlear implants.
View Article and Find Full Text PDF
Article Synopsis
  • The study explores a brain age prediction model for rhesus macaques using machine learning algorithms applied to neuroimaging data, aiming to determine their biological age and compare it to human brain aging.
  • Structural MRI data from 43 macaques were analyzed to create a comprehensive brain atlas, resulting in a model that predicts biological age with a correlation of 0.72 using 22 key features.
  • Key brain regions identified in the model, such as the Right Fronto-orbital Cortex and Right Frontal Pole, highlight similarities and differences in brain aging processes between non-human primates and humans.
View Article and Find Full Text PDF

Artificial intelligence and machine learning applications are emerging as transformative technologies in medicine. With greater access to a diverse range of big datasets, researchers are turning to these powerful techniques for data analysis. Machine learning can reveal patterns and interactions between variables in large and complex datasets more accurately and efficiently than traditional statistical methods.

View Article and Find Full Text PDF

Objective: To examine the association between preoperative comorbidities and cochlear implant speech outcomes.

Study Design: Retrospective cohort.

Setting: Tertiary referral center.

View Article and Find Full Text PDF

 Human papillomavirus-related (HPV + ) oropharyngeal squamous cell carcinoma (OPSCC) is increasing in incidence and presents diagnostic challenges given its unique clinical presentation.  The purpose of the present study is to characterize the impact of the unique clinical presentation of HPV-related OPSCC on delays in diagnosis.  Retrospective review of presenting symptoms and clinical characteristics of 284 patients with OPSCC treated from 2002-2014.

View Article and Find Full Text PDF

Purpose: This study utilized an automated segmentation algorithm to assess the cochlear implant electrode array within the cochlea and investigate its impact on audiologic outcomes as measured by post-operative speech perception scores. Furthermore, manual evaluations of electrode placement were compared to automatic segmentation methods to determine their accuracy in predicting post-operative audiologic outcomes.

Materials And Methods: This retrospective chart review was conducted at a tertiary care referral center involving adult post-lingually deafened cochlear implant recipients implanted from 2015 to 2019.

View Article and Find Full Text PDF

Monitoring the cochlear nerve during vestibular schwannoma (VS) microsurgery depends on the hearing status and surgical approach. Traditional hearing preservation VS microsurgery relies on acoustically driven auditory brainstem response (ABR) and cochlear nerve action potential. Both modalities have advantages and disadvantages that need to be understood for proper implementation.

View Article and Find Full Text PDF

Objective: Compare postoperative speech outcomes in hearing preservation (HP) cochlear implantation (CI) patients with a low-frequency pure-tone average (LFPTA) ≤ 60 dB using 2 electrode array designs.

Study Design: Retrospective cohort study.

Setting: Large academic cochlear implant referral center.

View Article and Find Full Text PDF

Background: During the ongoing COVID-19 pandemic, we are being exposed to large amounts of information each day. This "infodemic" is defined by the World Health Organization as the mass spread of misleading or false information during a pandemic. This spread of misinformation during the infodemic ultimately leads to misunderstandings of public health orders or direct opposition against public policies.

View Article and Find Full Text PDF

Objective: To assess the clinical application of five recently published cochlear implant (CI) candidacy evaluation (CICE) referral screening tools through external validation.

Study Design: Retrospective cohort study.

Setting: Tertiary otology/neurotology practice.

View Article and Find Full Text PDF

Objective: To compare the indications and efficacy of endoscopic over-under tympanoplasty versus endoscopic underlay tympanoplasty.

Methods: Retrospective cohort study of patients undergoing type I endoscopic tympanoplasty via either an underlay or over-under technique by a single surgeon from 2017 to 2021. Patients were excluded if they had a concurrent mastoidectomy, ossiculoplasty, or advanced cholesteatoma defined by involvement of multiple subsites.

View Article and Find Full Text PDF

Objectives: Carotid blowout syndrome (CBS) is a rare, life-threatening complication for patients with head and neck cancer (HNC). The primary objective was to identify factors associated with survival following CBS.

Materials And Methods: A retrospective analysis of HNC patients treated at a single tertiary care hospital with CBS between 2016 and 2020 was performed.

View Article and Find Full Text PDF

Background: During the last two decades, significant advancements in the treatment of laryngeal cancer have occurred. Although survival of head and neck cancer patients has improved over time, the temporal trend of laryngeal cancer survival is an area of controversy.

Methods: From 2004 to 2016, 77,527 patients who had laryngeal cancer treated with curative intent in the United States were identified in the National Cancer Database.

View Article and Find Full Text PDF

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. Electrophysiologic techniques such as electrocochleography (ECochG) and electrically-evoked compound action potentials (eCAP) are being studied to localize pathology and estimate residual cochlear vs.

View Article and Find Full Text PDF

Gender and race disparities in head and neck squamous cell carcinoma (HSNCC) survival are independently well documented, but no prior studies have examined the joint effect of these factors on HSNCC outcomes. We aim to comprehensively estimate the effect of gender and race on overall survival in HNSCC. We constructed a retrospective cohort from the National Cancer Database for primary HNSCC of the larynx, hypopharynx, oral cavity, and oropharynx from 2010 to 2015.

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessionu902m75oafjrgckfjuggmm6mkbu64cji): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once