Investigative Techniques Commons^™

Review Of Methodological Practices In Cadaveric Cerebral Arterial Morphometry: Variability In Contemporary Protocols (2015-2025), Marlena Muszynska, Emily Awdish, Afua Osei-Wusu, Parker Ballard

Annual Research Symposium

No abstract provided.

Safety Of Carotid Endarterectomy In The Elderly And Octogenarian Population: A Nationwide Study Including 80,000 Patients, Victor Gabriel El-Hajj, Joanna Roy, Basel Musmar, Wi Jin Kim, Michael Rizzuto, Nathaniel Ellens, Rabab Alshahrani, Victor Staartjes, Adrian Elmi-Terander, Ramachandra Tummala, Stavropoula Tjoumakaris, Michael Gooch, Robert Rosenwasswer, Ziad Khabbaz, Pascal Jabbour

Department of Neurosurgery Faculty Papers

INTRODUCTION: Carotid endarterectomy (CEA) is an established procedure for stroke prevention in patients with carotid artery stenosis. While CEA is considered safe in younger patients, perioperative risks in octogenarians remain debated, with current guidelines classifying the procedure as "high-risk" in this patient population. This study aimed to evaluate short-term outcomes of CEA across age groups and to assess whether comorbidity burden better predicts outcomes than chronological age.

METHODS: The ACS-NSQIP database (2013-2020), was used to identify patients eligible for inclusion. The cohort was stratified based on age <  60, 60-80, and > 80 years. Propensity score matching and multivariable logistic regression were used to compare …

Reliability Of Existing Measures And Classification Systems For Trochlear Dysplasia, Sean R. Waldron, Nihar S. Shah, Matthew W. Veerkamp, Brendan A. Williams, John A. Schlechter, Lauren H. Redler, Matthew D. Ellington, Shital N. Parikh

Department of Orthopaedic Surgery Faculty Papers

BACKGROUND: Patellofemoral instability (PFI) is common in adolescent patients and can lead to a reduction in quality of life and function, as well as long-term arthritis. Treatment of PFI involves assessing and, at times, surgically correcting underlying anatomic abnormalities. Trochlear dysplasia is the most common anatomic risk factor present in PFI.

PURPOSE: To determine the interrater reliability of existing measures and classification systems for the assessment of trochlear dysplasia.

STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 3.

METHODS: As part of the PRISM (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) patellar instability Research Interest Group (RIG) project, a …

Epidemiology Of Healthcare-Associated Ventriculitis And Meningitis (Hcavm) And Community-Acquired Meningitis/Encephalitis And Evaluation Of An Off-Label Pcr Panel For Hcavm Diagnosis, Jaime Nassur, Katarina Schnell, Christine Dolon, Laura Walters, Devin Weber, Matthew Pettengill

Department of Medicine Faculty Papers

Healthcare-associated ventriculitis and meningitis (HCAVM) is associated with high morbidity and mortality, but rapid diagnostic tests intended to cover microorganisms that typically cause HCAVM are not commercially available. We sought to evaluate the etiology of HCAVM compared to community-acquired meningitis/encephalitis (CAME) at our healthcare system, and to study the utility of repurposing a multiplex molecular panel intended for positive blood cultures for HCAVM cases. Our epidemiologic review demonstrated that HCAVM cases were primarily caused by bacteria and fungi also associated with bloodstream infections, in contrast with CAME cases, which were primarily caused by herpesviruses and Cryptococcus. Eighty-two cerebrospinal fluid …

Controlled Antibiotic Release From Emulsion-Loaded Alginate And Fibrin Hydrogels Using Ultrasound, Ziba Ghareh Nazi Fam, Asia Winslow, Mario Fabiilli, Sam Varghese, Brian Oeffinger, Flemming Forsberg, Noreen Hickok, Lauren Delaney

Department of Radiology Faculty Papers

Postoperative infections remain a major complication after spinal fusion surgery, often caused by biofilm-forming bacteria that resist short-term antibiotic prophylaxis. Vancomycin (VAN) is sometimes delivered locally during surgery; however, levels diminish rapidly, leaving patients vulnerable to late-onset infections. We developed a composite hydrogel integrating perfluorohexane-based emulsions within alginate or fibrin matrices to enable both sustained and ultrasound-triggered VAN release. Water-in-oil-in-water emulsions were prepared using fluorosurfactant-stabilized perfluorohexane as the volatile oil phase, then embedded in hydrogels and exposed to ultrasound (2.5 MHz, 5.5 MPa peak negative pressure) to initiate acoustic droplet vaporization for triggered release. Drug release was quantified spectrophotometrically and …

Use Of Electrocardiograms To Identify Coronary Artery Disease: Cross-Validation Of An Artificial Intelligence Model, Michael Leasure, Indu Poornima, Adam Butchy, Utkars Jain, Devin Vasoya, Michael Warnick, Brent Williams, John Rehder, Prahlad Menon, Veronica A. Covalesky, Gary S. Mintz

Department of Medicine Faculty Papers

BACKGROUND: The current gold standard for the diagnosis of coronary artery disease (CAD) is invasive angiography; however, it is an invasive procedure. Therefore, we developed an artificial intelligence model designed to predict significant CAD from a resting digital 12-lead electrocardiogram (ECG).

OBJECTIVES: This retrospective study assessed the model's ability to predict clinically significant CAD in a patient population presenting for coronary angiography.

METHODS: From 2019 to 2021, 16,476 patients had a resting 12-lead digital ECG recorded within 90 days prior to coronary angiography. The artificial intelligence model was developed using 10-fold cross-validation methodology. Clinically significant disease was defined as angiographic …

Stat-Independent Functions Of Janus Kinases 1 And 2 Are Obligatory For The Postnatal Development Of Mammary Epithelial Ducts, Rayane Dennaoui, Madison N. Wicker, Carson Moen, Michaela Schlederer, Kerry Vistisen, Aleata A. Triplett, Thomas Rülicke, Hallgeir Rui, Lukas Kenner, Emilio Casanova, Kay-Uwe Wagner

Department of Pharmacology, Physiology, and Cancer Biology Faculty Papers

Janus kinases 1 and 2 and STAT transcription factors are critical signaling nodes for numerous growth factors. In the mammary gland, JAK2 and STAT5a/b are essential for alveolar cell differentiation and lactation, but little is known about the cooperative roles of JAKs and STATs before pregnancy. We examined female mice conditionally deficient in JAK1/2 and discovered that both kinases jointly regulate epithelial cell proliferation and ductal morphogenesis. To assess the role of downstream STATs, we generated genetic models co-deficient in STAT3/5a/5b with or without STAT1 or JAK1. Although loss of STAT3/5a/5b leads to a JAK1-dependent upregulation of STAT1, the formation …

Plans4care, A Web Application Providing Caregivers Personalized Solutions To Manage Dementia-Related Care Challenges: Proof Of Concept And Efficacy Trial, Laura N. Gitlin, Eric Jutkowitz, Catherine V. Piersol, Sokha Koeuth, Taylor Sivori, Melinda J. Webster, Rachel N. Barnett, David L. Roth

Department of Occupational Therapy Faculty Papers

OBJECTIVE: Few dementia caregivers have access to evidence-based support programs. Web applications (app) may address this gap. Plans4Care, a web app, provides caregivers with on-demand personalized solutions to address care challenges. We present results of a proof-of-concept study and describe a trial protocol to test efficacy.

METHODS: To use Plans4Care, caregivers respond to brief onboarding questions, assess dementia patients' cognitive function, identify care challenges, and generate "action plans" (personalized strategies). Telehealth sessions with dementia-trained care advisors are available. A proof-of-concept study evaluated a clickable prototype using standardized technology scales to determine if >75 % scored positively on four criteria (acceptability, …

Development Of The Self-Administered Health Complexity Screening Instrument, Sheila Specker, Rachel Andrew, Emily Drexler, Emily Koithan, Steven Thurber, Steven Frankel

School of Medicine Faculty Publications

PURPOSE: The purpose of the study was to develop a self-administered screening tool to assist case managers, primary care physicians, and other clinicians in quickly and accurately identifying patients with complex health needs who require a definitive and detailed case management evaluation. In addition to medical and psychiatric items, this tool incorporates multiple social determinants of health (SDOH), known to add to clinical complexity. PRIMARY PRACTICE SETTING: This instrument is most appropriate for identifying patients with high complexity in the primary care sector. Due to the abundance of such patients with high biopsychosocial complexity and costs of treating these patients, …

Clinical Performance Of A Novel Point-Of-Care High-Sensitivity Cardiac Troponin I Assay, Alan H. B. Wu, Simon A. Mahler, Stacey L. House, Saeed A. Jortani, Michael H. Creer, Kristin L. Rising, Jason J. Bischof, Chad Crystal, Gary F. Headden, Fred S. Apple, Nicholas E. Harrison, Andrew C. Meltzer, Justin T. Baca, Brian Tiffany, Mark Sochor, Grace U. Pentecostes, Katrina P. Di Tullio, Manish S. Gupta, Adam J. Singer, James L. Januzzi

Department of Emergency Medicine Faculty Papers

BACKGROUND: High-sensitivity cardiac troponin (hs-cTn) assays performed in the central laboratory have long turnaround times. This study evaluates the clinical performance of a novel bedside point-of-care (POC) hs-cTnI assay (i-STAT® hs-TnI) to aid in the diagnosis of myocardial infarction (MI).

METHODS: A prospective multisite cohort study involving emergency department (ED) patients with symptoms suggestive of acute coronary syndrome was conducted at 28 sites across the United States. Serial whole blood samples were collected at 0-1 h and >1-3 h from ED presentation. Primary outcome was MI or non-MI. Sensitivity, specificity, and negative predictive value (NPV) for MI were calculated with …

Micrornas In Prostate Cancer Liquid Biopsies: Early Detection, Prognosis, And Treatment Monitoring, Seyyed Mohammad Yaghoubi, Erfan Zare, Sina Jafari Dargahlou, Maryam Jafari, Mahdiye Azimi, Maedeh Khoshnazar, Solmaz Shirjang, Behzad Mansoori

Student Papers, Posters & Projects

Prostate cancer (PCa) is a common malignancy in men worldwide, with incidence projected to rise in the coming years. Traditional screening and diagnostic methods, such as prostate-specific antigen (PSA) testing and biopsy, face limitations in specificity and invasiveness. Circulating microRNAs (miRNAs) have emerged as stable, non-invasive biomarkers obtainable via liquid biopsies (blood, urine, semen) that could transform PCa management. These small regulatory RNAs reflect underlying tumor biology and are detectable at early disease stages, enabling improved early detection when used alongside or in place of PSA. Distinct miRNA expression patterns correlate with tumor aggressiveness. For example, miR-141 and miR-375 are …

Dexmedetomidine Versus Propofol For Reducing Emergence Delirium In Pediatric Anesthesia: A Scoping Review, Hannah Laxton Bsn, Rn, Hannah Mclain Bsn, Rn, Robert Mohr Bsn, Rn, Sarah Rocha Bsn, Rn, Laura Reed Dnp, Aprn, Fnp-Bc, Cne, Dwanye Accardo Dnp, Crna, Faana

Doctor of Nursing Practice Projects

Purpose/Background 

Propofol is widely regarded as the standard anesthetic agent for preventing and treating emergence delirium, particularly in pediatric patients. Emergence delirium presents as postoperative agitation that may escalate to self-injurious behavior that can lead to disruption of critical lines or equipment. Since its approval in 1999, dexmedetomidine has gained attention for its sedative and sympatholytic properties, offering potential advantages over propofol. This study compares the postoperative effects of propofol and dexmedetomidine in reducing emergence delirium in pediatric surgical patients.

Methods 

A scoping review was conducted using PRISMA guidelines to identify relevant literature published between 2000 and 2025. Databases searched …

Identifying Relevant Covariates In Rna-Seq Analysis By Pseudo-Variable Augmentation, Yet Nguyen, Dan Nettleton

Mathematics & Statistics Faculty Publications

RNA-sequencing (RNA-seq) technology allows for the identification of differentially expressed genes, which are genes whose mean transcript abundance levels vary across conditions. In practice, RNA-seq datasets often include covariates that are of primary interest in addition to a set of covariates that are subject to selection. Some of these covariates may be relevant to gene expression levels, while others may be irrelevant. Ignoring relevant covariates or attempting to adjust for the effect of irrelevant covariates can compromise the identification of differentially expressed genes. To address this issue, we propose a variable selection method that uses pseudo-variables to control the expected …

Ai-Assisted Surface-Enhanced Raman Spectroscopy For Cardiovascular Diagnostics: From Plasmonic Materials To Clinical Translation, Anju Joshi, Gymama Slaughter

Center for Bioelectronics Publications

Raman spectroscopy (SERS) has emerged as a powerful analytical technique, offering molecular fingerprint specificity and ultrasensitive detection of cardiac biomarkers. Recent advances in plasmonic nanostructures, surface functionalization strategies, and flexible sensing platforms have significantly improved the analytical performance of SERS-based biosensors. In parallel, the integration of artificial intelligence (AI) and machine learning has enabled robust interpretation of complex spectral datasets, facilitating automated biomarker classification and improved diagnostic accuracy in heterogeneous biological environments. Despite these advances, the field remains fragmented, with limited integration between nanomaterial design, biomarker selection, and data-driven analysis, and persistent challenges related to reproducibility, standardization, and clinical validation. …

Modulation Of Prussian Blue Redox Signaling By Molecular Imprinting For Reagent-Free Electrochemical Detection Of Emtricitabine, Abdellatif Ait Lahcen, Gymama Slaughter

Center for Bioelectronics Publications

Reagent-free electrochemical sensors offer significant benefits for rapid, affordable point-of-care drug testing. In this study, we introduce a novel, reagent-free electrochemical sensor based on a molecularly imprinted polymer (MIP) specifically designed for the selective detection of Emtricitabine (FTC), a common antiretroviral used in HIV therapy. The sensor uses laser-induced graphene (LIG) electrodes, renowned for their high conductivity and porosity, ideal for electrochemical sensing. To enable reagent-free operation, the LIG surface was electrochemically coated with Prussian Blue, serving as a redox-active layer. Next, an MIP-PPy film was electropolymerized onto the Prussian Blue surface in the presence of FTC as a template, …

Thoracolumbar Fractures: Historical Systems And Advancements With The Ao Spine Classification, Barry Ting Sheen Kweh, Alex R. Vaccaro, Gregory D. Schroeder, Jose A. Canseco, Maximilian Reinhold, Mohamed M. Aly, Sebastian Bigdon, Mohammad El-Skarkawi, Richard J. Bransford, Andrei Fernandes Joaquim, Harvinder Singh Chhabra, Emiliano Vialle, Rishi M. Kanna, Charlotte Dandurand, Cumhur Öner, Jin Wee Tee

Rothman Institute Papers

Study Design: Systematic Review. Objective: To describe the historical classifications of thoracolumbar injuries and their evolution into the AO Spine Thoracolumbar Injury Classification System. Methods: A systematic review of MEDLINE, EMBASE and Cochrane Databases was performed in keeping with Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. Results: 445 articles were crystallized to 14 included studies. Simple categorization systems offered by Bohler or Watson-Jones merely identify fracture morphology. Holdsworth and Denis conveyed a sense of the stability of injuries by noting columns of stability, but still failed to take into consideration important factors such as neurological status or …

A Painful Diffuse Rash, Bruce M. Lo, Melanie Shoemaker, Kiersten Potter, Katherine Schaffer

Department of Emergency Medicine Faculty Publications

[Patient presentation]

A 41-year-old male with no past medical history presented with 1 week of ulcers to the left side of his face, followed by several days of a painful rash to the trunk and back after a sexual encounter. The patient denies any fever or previous rash and any illicit drug use. Initial vital signs included a temperature of 97 °F, a heart rate of 89 beats per minute, and blood pressure of 135/79 mm Hg. Physical examination revealed a macular papular rash across his trunk and back (Fig 1) and facial ulcerations with eschar (Fig 2) at the …

Dementia Incidence In Patients With Prurigo Nodularis: An Observational Retrospective Cohort Study, Madison P. Olexson, Ana Ormaza Vera, Chunghwan Ro, Clinton W. Enos

Department Dermatology Faculty Publications

[Introduction] Prurigo nodularis (PN) is a chronic neuroinflammatory dermatosis of unknown etiology characterized by severely pruritic, symmetrically-distributed nodules with a negative impact on quality of life [1]. While some consider PN a primary idiopathic disorder, it often arises as a secondary manifestation of underlying conditions, including atopic dermatitis (AD), chronic kidney disease (CKD), human-immunodeficiency-virus (HIV), and thyroid disorders [2]. Although patients with PN are at higher risk for psychiatric comorbidities including depression, anxiety, and suicidal ideation [3] research which investigates associations between PN and neurodegenerative disorders is limited [4]. Moreover, emerging evidence implicating sustained systemic inflammation, characteristic of psoriasis and …

Non-Invasive Detection Of Intracranial Pressure, Andrei V. Nesterenko

Honors Undergraduate Theses

Intracranial pressure is a critical metric used when managing tumors, strokes, TBIs, hydrocephalus, and other operative conditions. Traditional methods for continuous ICP monitoring, intraparenchymal catheters, epidural transducers etc., are invasive and carry a high risk of infection. Previous attempts to create accurate, easy to use, and non-invasive ICP monitoring techniques have been unsuccessful. In this study, we investigated the utility of supraorbital and posterior auricular photoplethysmography to monitor changes in ICP during orthostatic tilt and hyperventilation, which increase and decrease ICP respectively.

Through a continuous 5-minute recording on a tilt-table we characterized SOA and PAA waveforms in 12 participants (ages …

Brief Pulses Of High-Level Fluid Shear Stress Enhance Metastatic Potential And Rapidly Alter The Metabolism Of Cancer Cells, Amanda N. Pope, Devon L. Moose, Guy O. Hudson, Hank R. Weresh, Marion R. Dykstra, Aabha Y. Joshi, Patrick Breheny, Eric B. Taylor, Michael D. Henry

Department of Biomedical and Translational Sciences Faculty Publications

Circulating tumor cells (CTCs) face challenges to their survival, including mechanical and oxidative stresses that are different from cancer cells in solid primary and metastatic tumors. The impact of adaptations to the fluid microenvironment of the circulation on the outcome of the metastatic cascade is not well understood. Here, we find that cancer cells exposed to brief pulses of high-level fluid shear stress (FSS) exhibit enhanced invasiveness and anchorage-independent proliferation in vitro and enhanced metastatic colonization/tumor formation in vivo. Cancer cells exposed to FSS rapidly alter their metabolism in a manner that promotes survival by providing energy for cytoskeletal remodeling …