Surgery Commons^™

Meshless Mechanics And Point-Based Visualization Methods For Surgical Simulations, Rifat Aras

Computational Modeling & Simulation Engineering Theses & Dissertations

Computer-based modeling and simulation practices have become an integral part of the medical education field. For surgical simulation applications, realistic constitutive modeling of soft tissue is considered to be one of the most challenging aspects of the problem, because biomechanical soft-tissue models need to reflect the correct elastic response, have to be efficient in order to run at interactive simulation rates, and be able to support operations such as cuts and sutures.

Mesh-based solutions, where the connections between the individual degrees of freedom (DoF) are defined explicitly, have been the traditional choice to approach these problems. However, when the problem …

Feasibility Of Diagnosis Of Postcardiotomy Tamponade By Miniaturized Transesophageal Echocardiography., Hitoshi Hirose, Md, Shreya Gupta, Bs, Harrsion Pitcher, Md, Joseph Miessau, Ms, Qiong Yang, Md, Jenny Yang, Md, Nicholas Cavarhocchi, Md

Department of Surgery Faculty Papers

BACKGROUND: Pericardial tamponade after cardiac surgery is a critical diagnosis that can be difficult to diagnose using conventional cardiac monitoring. Transesophageal echocardiography can provide comprehensive information to make the diagnosis but is not always available, whereas transthoracic echocardiography has its utility limited because of the body habitus or other surgical effects. New monitoring devices, miniaturized hemodynamic transesophageal echocardiography (hTEE), which allows point of care assessment of cardiac filling and functions, may aid in diagnosis of postcardiotomy tamponade.

METHODS: From May 2011 to July 2013, 21 patients underwent hTEE to rule out pericardial tamponade for clinical suspicion of tamponade after open …

Targeting The Wnt/Β-Catenin Signaling Pathway In Liver Cancer Stem Cells And Hepatocellular Carcinoma Cell Lines With Fh535, Roberto Gedaly, Roberto Galuppo, Michael F. Daily, Malay B. Shah, Erin Colleen Maynard, Changguo Chen, Xiping Zhang, Karyn A. Esser, Donald A. Cohen, B. Mark Evers, Jieyun Jiang, Brett T. Spear

Surgery Faculty Publications

Activation of the Wnt/β-catenin pathway has been observed in at least 1/3 of hepatocellular carcinomas (HCC), and a significant number of these have mutations in the β-catenin gene. Therefore, effective inhibition of this pathway could provide a novel method to treat HCC. The purposed of this study was to determine whether FH535, which was previously shown to block the β-catenin pathway, could inhibit β-catenin activation of target genes and inhibit proliferation of Liver Cancer Stem Cells (LCSC) and HCC cell lines. Using β-catenin responsive reporter genes, our data indicates that FH535 can inhibit target gene activation by endogenous and exogenously …

Sphingosine-1-Phosphate Promotes The Differentiation Of Adipose-Derived Stem Cells Into Endothelial Nitric Oxide Synthase (Enos) Expressing Endothelial-Like Cells., Divya Arya, Shaohua Chang, Paul J Dimuzio, Jeffrey Carpenter, Thomas N Tulenko

Department of Surgery Faculty Papers

BACKGROUND: Adipose tissue provides a readily available source of autologous stem cells. Adipose-derived stem cells (ASCs) have been proposed as a source for endothelial cell substitutes for lining the luminal surface of tissue engineered bypass grafts. Endothelial nitric oxide synthase (eNOS) is a key protein in endothelial cell function. Currently, endothelial differentiation from ASCs is limited by poor eNOS expression. The goal of this study was to investigate the role of three molecules, sphingosine-1-phosphate (S1P), bradykinin, and prostaglandin-E1 (PGE1) in ASC endothelial differentiation. Endothelial differentiation markers (CD31, vWF and eNOS) were used to evaluate the level of ASCs differentiation capability. …

Hiv-1 Subtype A Gag Variability And Epitope Evolution, Syed Hani Abidi, Marcia L. Kalish, Farhat Abbas, Sarah Rowland-Jones, Syed Ali

Section of Urology

Objective: The aim of this study was to examine the course of time-dependent evolution of HIV-1 subtype A on a global level, especially with respect to the dynamics of immunogenic HIV gag epitopes.
Methods: We used a total of 1,893 HIV-1 subtype A gag sequences representing a timeline from 1985 through 2010, and 19 different countries in Africa, Europe and Asia. The phylogenetic relationship of subtype A gag and its epidemic dynamics was analysed through a Maximum Likelihood tree and Bayesian Skyline plot, genomic variability was measured in terms of G → A substitutions and Shannon entropy, and the time-dependent …

Utility Of The Stop-Bang Questionnaire For Identifying Obstructive Sleep Apnea In Patients Undergoing Bariatric Surgery, Karen Jablonski, Md, Ritu G. Grewal, Md, Ramya Punati,, Shivam Saxena, Karl Doghramji, Md, Alec Beekley, Md, David S. Tichansky, Md

Department of Surgery Faculty Papers

Introduction

Patients undergoing bariatric surgery are at high risk for obstructive sleep apnea (OSA).

OSA has been associated with an increased risk of perioperative complications, but is under-recognized and underdiagnosed in the bariatric population.

It is currently recommended that all patients considering bariatric surgery for obesity should be evaluated for OSA.

In the general pre-surgical population, the STOP-BANG questionnaire is a validated screening tool for identifying OSA.

We hypothesize that in bariatric patients the STOP-BANG questionnaire plus other clinical variables can predict OSA.

Department Of Surgery Update, June 2014, Wright State University Department Of Surgery

Department of Surgery Updates

A three page newsletter created by the Department of Surgery documenting changes to the department. This issue contains a message from the chair, a list of important dates, committee meetings, scholarly activity and more.

Reuse Of Liver Grafts Following Brain Death Of The Initial Recipient, Hideaki Tanaka, Vivian Mcalister, Mark Levstik, Cameron Ghent, Paul Marotta, Douglas Quan, William Wall

Data and Test Instruments

AIM: To determine if there is a reasonable prospect of success of a re-use liver transplantation. METHODS: We systematically searched for reports of liver graft re-use using electronic searches of PubMed and Web of Knowledge. We performed hand searches of references lists of articles reporting re-use of grafts. RESULTS:A systematic review of the literature reveals 28 liver transplantations using previously transplanted grafts. First and second recipients ranged in age from 4 to 72 years and 29 to 62 years respectively. Liver disease in the first recipient was varied including 5 (18%) patients with fulminant liver failure who died subsequently of …

Francis F. Maury, M.D. (1840 To 1879): An Often Forgotten Pioneer In Early American Surgery., Guillaume S. Chevrollier, B.S., Scott W. Cowan, Md, Charles J. Yeo, Md, John C. Kairys, Md

Department of Surgery Gibbon Society Historical Profiles

Francis F. Maury (Fig. 1) was born on August 9, 1840, in Danville, Kentucky, where he was raised on a farm by his mother and father. His father was an Episcopal clergyman of Huguenot descent, whose forefathers had fled from France to escape religious persecution. After receiving a Bachelor of Arts degree from Center College in the summer of 1860, he entered medical school at the University of Virginia. After one full term, he matriculated to Philadelphia’s Jefferson Medical College and completed his medical education as a private student under the direction of Dr. Samuel D. Gross.1, 2 He obtained …

Ambroise Paré (1510 To 1590): A Surgeon Centuries Ahead Of His Time., James T. Shen, B.S., Michael Weinstein, Md, Alec C. Beekley, Md, Charles J. Yeo, Md, Scott W. Cowan, Md

Department of Surgery Gibbon Society Historical Profiles

In their extensive writings, Hippocrates and Celsus counseled physicians to be knowledgeable in both the medical and surgical management of patient recovery. However, their words fell by the wayside because cutting of the body was forbidden by the Roman Catholic Church. Furthermore, the contemporaneous Arabic medical teachings emphasized tradition and authority over observation and personal experience. This created an ever-growing rift between the schools of surgical and pharmacologic medicine with both groups denying their involvement in the other domain. Surgeons had been plagued by postoperative complications including infection, malnutrition, and muscular wasting for centuries. Surgeons were forced to re-examine how …

Functional Health Status In Children And Adolescents After Fontan: Comparison Of Generic And Disease-Specific Assessments., Brian W. Mccrindle, Victor Zak, Victoria L. Pemberton, Linda M. Lambert, Victoria L. Vetter, Wyman W. Lai, Karen Uzark, Renee Margossian, Andrew M. Atz, Amanda Cook, Jane W. Newburger, Pediatric Heart Network Investigators, Girish S. Shirali

Manuscripts, Articles, Book Chapters and Other Papers

PURPOSE: The aim of this study was to compare associations between generic versus disease-specific functional health status assessments and patient and clinical characteristics for patients with severe congenital heart disease.

METHODS: This was a cross-sectional observational study involving 325 single ventricle patients, aged 10-18 years, after Fontan procedure. Enrolled patients underwent a medical history review, laboratory testing, and assessment of the functional health status by completion of the generic Child Report Child Health Questionnaire and the disease-specific Congenital Heart Adolescent and Teenage questionnaire. Correlated conceptually equivalent domains from both questionnaires were identified and their associations with patient and clinical variables …

Inter-Observer Variability In Diagnosing Radiological Features Of Aneurysmal Subarachnoid Hemorrhage; A Preliminary Single Centre Study Comparing Observers From Different Specialties And Levels Of Training, Usman T Siddiqui, Anjum F. Khan, Muhammad Shahzad Shamim, Rana Shoaib Hamid, Muhammad Mehboob Alam, Emaduddin Siddiqui

Department of Surgery Docs

No abstract provided.

Vascular Surgery In Pakistan: Critical Issues, Zia Ur Rehman, Ziad Sophie

Department of Surgery Docs

No abstract provided.

Transcatheter Versus Surgical Closure Of Atrial Septum Defect: A Debate From A Developing Country, Waleed T. Siddiqui, Tariq Usman, Mehnaz Atiq, Muneer Amanullah

Department of Radiology

Abstract

INTRODUCTION:

This study compares the effectiveness and cost of trans-catheter verses surgical closure of secundum atrial septumdefect (ASD). ASD accounts for 10% of congenital cardiac defects. Trans-catheter closure of secundum ASD is increasingly used as the primary intervention. Surgical repair is advised in a proportion of secundum type defects which are unsuitable for device closure.

METHODS:

We reviewed the clinical course of 176 patients who underwent closure of isolated secundum ASD. The patients were assigned to either the device or surgical group depending upon the treatment they received. Successful closure was assessed immediately after the procedure. The following outcomes …

An Uncommon Complication During Trans-Aortic Valve Replacement, Sanjeev Nair Md, Yassir Nawaz Md, Nainesh C. Patel Md, David A. Cox Md, William Combs Md, Raymond L. Singer Md, J Patrick Kleaveland Md

Department of Medicine

No abstract provided.

A Comparison Of Angiography Versus Intravascular Ultrasound In The Treatment Of Peripheral Arterial Disease, Michael Pompliano

Senior Theses

Peripheral Arterial Disease is a growing epidemic throughout the United States. It is estimated that 8 to 12 million Americans currently suffer from PAD, a disease of the circulatory system that limits blood flow to your hands and feet. This limited blood flow is due to the narrowing of the arteries that supply blood throughout your body and can disrupt the balance of the nerves and tissues that make up your extremities. If left untreated, it can cause irreparable, life- threatening damage that may result in amputation of the diseased limb. Although the mechanism of PAD is known and well …

"What Happens In Romania..." Comes Back To The United States And Becomes A Quilt, Ashley Ehlers, Kaitlyn Torres

Senior Theses

Our senior thesis project is a quilt that chronicles our experiences on the Maymester trip to Romania through the Honors College, during which we were able to shadow surgeons in the Oncology Hospital and General Surgery III Hospital in Cluj-Napoca. In our quilt, we included some of the most common surgeries we saw while shadowing Romanian doctors: breast removal, gall bladder removal, appendix removal, removal of a section of the large intestine, and removal of the uterus. The final product of this quilt shows every level of the abdominal muscles and organs from the anterior skin to the kidneys.

To …

Kyphotic Progression After Thoracolumbar Burst Fractures Treated Conservatively, With Mis, Or Via Open Approach, Mark Rivkin, Howard Eisenbrock

Research Day

Management of thoracolumbar burst fractures (AO A3) without neurological deficit is subject to debate in the literature. While TLICS provides guidance for injuries necessitating intervention, it makes little mention of best surgical approaches. Furthermore, intact patients with suspected posterior ligamentous complex injury (TLICS 4) compose an additional level of management uncertainty. Present study examined outcomes for TL burst fractures in neurologically intact patients with suspected disruption of the PLC treated with bracing, MIS, or open fixation and fusion.

Department Of Surgery Update, May 2014, Wright State University Department Of Surgery

Department of Surgery Updates

A five page newsletter created by the Department of Surgery documenting changes to the department. This issue contains news about students and faculty, a list of important dates, committee meetings, scholarly activity and more.

Roscoe Reid Graham (1890 To 1948): A Canadian Pioneer In General Surgery., Christine C. Piper, Ba, Charles J. Yeo, Md, Scott W. Cowan, Md

Department of Surgery Gibbon Society Historical Profiles

Roscoe Reid Graham, a Canadian surgeon trained at the University of Toronto, was a true pioneer in the field of general surgery. Although he may be best known for his omental patch repair of perforated duodenal ulcers-often referred to as the "Graham patch"-he had a number of other significant accomplishments that decorated his surgical career. Dr. Graham is credited with being the first surgeon to successfully enucleate an insulinoma. He ventured to do an essentially brand new operation based solely on his patient's symptoms and physical findings, a courageous move that even some of the most talented surgeons would shy …