Medicine and Health Sciences Commons^™

Renal Angina Index As A Predictor Of Acute Kidney Injury In Critically Ill Children, Athul Shelly Kooliyath

Theses & Dissertations

Background: Acute kidney injury is associated with increased morbidity and mortality in hospitalized children. In the critically ill,DR WILLIAM M MACHARIA acute kidney injury (AKI) is prevalent and difficult to diagnose. Using conventional methods, AKI is often missed thus delaying the diagnosis up to 48 hours after initial injury. Though some biomarkers that identify AKI early have been identified, they may still be insufficient due to prohibitive costs. Renal angina index is used to identify ongoing renal injury. It is a product of the clinical state and the estimated glomerular filtration rate (eGFR) of a patient during admission to a …

Facilitators And Barriers To Implementing A Community Rotation To The Internship Training In Kenya, Peter Mwanza Kioko

Theses & Dissertations

Background: Primary care is increasingly being prioritized all over the world more so in developing countries in an effort geared towards achieving health equity. The availability of skilled human resources at the community level has been shown to improve health outcomes. However, doctor numbers remain low in sub-Saharan countries. Kenya’s policy on universal health coverage aims to enable access to essential health services by all its citizens by 2022. The introduction of community placements among undergraduate medical students has proven beneficial in understanding community health problems, the role of primary care in health as well as increasing the likelihood of …

Optimal Fasting Duration To Effectively Suppress Physiological 18f- Fluorodeoxyglucose (Fdg) Myocardial Uptake On A Positron Emission Tomography Scan., Fatima Abdullahi Ali

Theses & Dissertations

Background: Positron emission tomography (PET) with 18F fluorodeoxyglucose (FDG) is used in evaluation of inflammatory disorders, including the heart such as cardiac sarcoidosis and myocarditis. However, the normal uptake of the myocardium is a challenge as it can obscure pathological uptake in these conditions. The primary objective of this study is to determine the optimal fasting duration to suppress physiological myocardial uptake and thereafter establish an imaging protocol.

Methods: Patients who had whole body FDG PET CT examination for oncological evaluation at the Aga Khan University Hospital between January 2019 and December 2020 were retrospectively reviewed. Patients were divided into …

Post-Transplant Hepatic Graft Fibrosis In Pediatric Liver-Inclusive Transplant Recipients, Hanh D. Vo

Theses & Dissertations

Hepatic graft fibrosis is a common histologic finding following pediatric liver transplant (LT) that may affect the long-term graft outcome. Hence, it is essential to identify hepatic graft fibrosis at a stage where fibrosis is not yet clinically apparent but has the potential for progression to initiate appropriate intervention and prevent its progression. Liver biopsy is the gold standard for fibrosis staging, but it is invasive, requires general anesthesia in children, and has potential complications. Our long-term goal is to implement non-invasive tests to assess and monitor the progression of hepatic graft fibrosis in liver-inclusive transplant children. The work presented …

Glad To Be Out. I Was Running Out Of Womb: A Study Of Omega-6 And Omega-3 Fatty Acid Metabolites At Delivery And Their Relationship To Infant Growth, Prematurity, And Admission To The Neonatal Intensive Care Unit, Maranda Thompson

Theses & Dissertations

Normal pregnancy relies on inflammation for implantation, placentation, and parturition, but uncontrolled it can lead to poor infant outcomes. Maternal diet is one modifiable factor that can impact inflammation. Omega-3 and omega-6 fatty acids have been shown to be metabolized into bioactive metabolites that effect inflammation. The presence and importance of these metabolites at the time of delivery are not well understood. Therefore, the purpose of this dissertation was to first quantify omega-3 and omega-6 metabolites in maternal plasma, cord plasma, and placental tissue. Then the relationships between metabolites and infant outcomes, including birth weight percentile, length percentile, head circumferences …

The Ecology Of Mental Health And The Impact Of Barriers On Mental Health Service Utilization, Alisha Aggarwal

Theses & Dissertations

Mental health has emerged as a major public health concern in recent times with several disparities and barriers related to adequate health service utilization. Different age groups experience diverse symptoms and face distinct barriers in accessing and utilizing healthcare. Policies like Mental Health Parity and Addiction Equity Act and the Patient Protection and Affordable Care Act were launched to improve insurance coverage and delivery of mental health services. However, a large gap of unmet needs exists for adequate mental health service utilization in the country. This dissertation aims to describe the financial and non-financial barriers to mental health service utilization …

Evaluation Of Stratified Antibiograms For Use In Laboratory And Antimicrobial Stewardship, Linsey Donner

Theses & Dissertations

Antibiograms are critical for choosing empiric antimicrobial therapy. Cumulative antibiograms, which aggregate susceptibility data, can mask differences within specific patient subsets or clinical syndromes. This dissertation was done to determine if antibiotic susceptibilities showed substantial differences when comparing stratified antibiograms to cumulative antibiograms.

Antibiotic susceptibility data was retrospectively obtained from Nebraska Medicine January 1, 2017 – December 31, 2019 for Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, Staphylococcus aureus, and Enterococcus faecalis. The University of Nebraska Medical Center’s web antibiogram clinical decision support tool was used to export the data. Bacteria-antibiotic susceptibility rates of stratified antibiograms …

Development Of A Muc16-Targeted Near-Infrared Antibody Probe For Fluorescence-Guided Surgery Of Pancreatic Cancer, Madeline T. Olson

Theses & Dissertations

Pancreatic cancer (PDAC) is an extremely lethal disease with an overall survival rate of 10%. Surgery remains the only potentially curative treatment option, but resections are complicated by infiltrative disease, proximity of critical vasculature, peritumoral inflammation, and dense stroma. Surgeons are limited to tactile and visual cues to differentiate cancerous tissue from normal tissue. Furthermore, translating preoperative images to the intraoperative setting poses additional challenges for tumor detection, and can result in undetected and unresected lesions. Thus, PDAC has high rates of incomplete resections, and subsequently, disease recurrence. Fluorescence-guided surgery (FGS) has emerged as a method to improve intraoperative detection …

The Rotator Cuff Tendon-To-Bone Interface: Maturation, Aging, And 3d Bioprinting For Regeneration, Xiping Jiang

Theses & Dissertations

Rotator cuff tendon injuries often occur at the tendon-to-bone interface (i.e., enthesis) area with a high prevalence for the elderly population. In addition, regeneration of the gradient structure of the enthesis is still a significant clinical challenge. Our studies aim to identify the histological, molecular, and biomechanical alterations of the rotator cuff enthesis with maturation and aging, and develop a novel therapeutic method using three-dimensional (3D) bioprinting technique to regenerate a functional enthesis. Striking variations of the entheses were observed both histologically and biomechanically during the maturation process. The histological features did not show many differences at the insertion site …

Urinary Bile Acid Indices As Prognostic Biomarkers For The Complications Of Liver Diseases, Wenkuan Li

Theses & Dissertations

Hepatobilary diseases cause the accumulation of toxic bile acids (BA) in the liver, blood, and other tissues, which may lead to an unfavorable prognosis. In this study, we compared the urinary BA profile in 257 patients with hepatobilary diseases during a 7-year follow-up period. We investigated the use of the urinary BA profile to develop logistic regression models to predict the prognosis of hepatobiliary diseases in terms of developing disease-related complications, especially for ascites. The urinary BA profile was characterized by calculating BA indices, which quantify the composition, metabolism, hydrophilicity, and toxicity of the BA profile. All patients had high …

Apixaban To Prevent Thrombosis In Adult Patients Treated With Asparaginase, Krishna Gundabolu

Theses & Dissertations

The outcomes of pediatric acute lymphoblastic leukemia (ALL) have improved dramatically after intensification of the multi-agent chemotherapy backbone over a period of time starting from 1960’s, and asparaginase (ASP) is an important part of this success story. Adoption of such strategy in adult ALL and other high grade lymphoid neoplasms had been difficult due to higher anticipated toxicities including thrombosis. Many thrombosis prevention strategies including antithrombin (AT) replacement, Enoxaparin, unfractionated heparin (UFH) was studied but there is no firmly established evidence-based approach yet. We report the safety and efficacy of thrombosis prophylaxis with apixaban 2.5 mg orally twice daily for …

A Collection Of Research In Transplantation Surgery: The Importance Of Assessing Outcomes In A Field Dependent On The Availability Of Limited Resources, Amy J. Hargrove

Theses & Dissertations

This thesis is a collection of three independent projects related to transplantation surgery. In summary, project I involves an assessment of long-term quality of life outcomes of intestinal transplantation in pediatric patients who are now in adulthood, with comparison to other solid organ transplant patients. Health related quality of life surveys were completed in 14 adult patients who underwent intestine, liver, or kidney transplants as children. Project II evaluates pre-surgical characteristics of patients undergoing liver transplant to assess predictive factors for the need of venovenous bypass utilization intraoperatively by assessing trends at the University of Nebraska Medical Center in 95 …

Proof Of Concept: The Use Of Renal Biomarkers In Critically Ill Pediatric Patients For Therapeutic Drug Monitoring, Christopher Lee Shaffer

Theses & Dissertations

Acute kidney injury (AKI) is a serious and common complication in critically ill pediatric patients. The incidence of pediatric AKI continues to increase, especially in patients who undergo surgical correction of congenital heart defects. Serum creatinine and urine output are the most commonly used tools to assess renal function, with international guidelines standardizing AKI-definitions based upon these parameters. However, changes in serum creatinine can occur 24 hours or later after a renal insult event, delaying the diagnosis and potential interventions to reverse injury. It is critical to identify endogenous renal biomarkers within the pediatric population that are both timely and …

Molecular Pathogenesis Of A Novel Subgroup Of Peripheral T-Cell Lymphomas, Jiayu Yu

Theses & Dissertations

Peripheral T-cell Lymphoma (PTCL) consists of numerous distinct disease entities. With the current diagnostic criteria over a third of the cases cannot be further classified and are called "not otherwise specified" (PTCL-NOS). Using gene expression profiling (GEP) of tumors, we identified two novels PTCL-NOS molecular subgroups either characterized by high expression of GATA3 (33%), which is associated with Th2 cell differentiation, or high expression of TBX21 (49%) which regulates Th1 cell maturation. Therefore, stratifying patients for diagnosis and identifying the underlying genetic basis to improve clinical therapy becomes critical to prognosis.

First, we performed DNA copy number analysis by using …

Insights Into Cutaneous Squamous Cell Carcinoma Pathogenesis And Metastasis Using A Bedside-To-Bench Approach, Marissa Lobl

Theses & Dissertations

Cutaneous squamous cell carcinoma (SCC) is the second most common skin cancer, affecting 1,000,000 people in the United States annually and causing approximately 9,000 deaths. SCC and basal cell carcinoma are the most common types of skin cancer arising in the superficial squamous cells or deeper basal cells of the epidermis, respectively. SCC is more likely to invade and metastasize, while basal cell cancer tends to grow locally. While the majority of cases of SCC are cured by surgery alone, approximately 2-5% of SCCs metastasize, at which point outcomes may be poor. Specific patient groups, particularly immunosuppressed patients, have a …

Gene Expression Profiling Of Mapk Pathway Inhibitor Resistance In Cutaneous Melanoma: Can Bioinformatics Be Used To Select Better Melanoma Cell Lines?, Stephen Luebker

Theses & Dissertations

Melanoma is the deadliest form of skin cancer, and incidence has continued to increase. Half of all melanomas have a BRAF V600E mutation and respond to MAPK pathway inhibitors, including BRAF inhibitor therapy or BRAF/MEK inhibitor combination therapy, but nearly all patients develop treatment resistance. Melanoma cell lines produce variable results as models of MAPK pathway inhibitor resistance. To better understand how the genomic similarity of a melanoma cell line to patient-derived tumors affects resistance mechanisms, differences in DNA mutations and copy-number alterations were compared between melanoma cell lines profiled by the Cancer Cell Line Encyclopedia and cutaneous melanoma tumors …

Superoxide And Pulmonary Hypertension, Tammy Wichman

Theses & Dissertations

Pulmonary arterial hypertension (PAH) is a devastating cardiovascular disease, which is progressive and fatal despite advances in therapy. Animal models have shown that oxidative stress may be pathogenic in PAH. We hypothesize that oxidative stress, as measured by increased levels of a specific reactive oxygen species, superoxide (O₂^•-), mayplay a role in PAH in humans. Using a novel application of electron paramagnetic resonance (EPR) spectroscopy, we initially evaluated whether levels of O₂^•- from whole blood collected from the pulmonary artery collected during right heart catheterization (RHC) would correlate with O₂^•- levels in peripheral …

Health-Related Quality Of Life Of Children With Gastroesophageal Reflux Disease After Nissen Fundoplication And Gastrostomy Tube Insertion, Felix Wafula Musibi

Theses & Dissertations

Background: Gastroesophageal reflux disease (GERD) negatively impacts the health-related quality of life (HRQoL). Nissen fundoplication is done when medical treatment fails. Goal of therapy is to eliminate symptoms and improve quality of life.

Justification: HRQoL is a key indicator that we can use to evaluate the impact of our interventions so that we can make evidence-based decisions and advice our patients appropriately based on the outcomes of these interventions.

Objectives: The primary objective was to assess the HRQoL of children with GERD after Nissen fundoplication alone or Nissen fundoplication and gastrostomy tube insertion.

Methods: Design- Observational …

The Prevalence Of Albuminuria In Children With Chronic Kidney Disease In Two Tertiary Hospitals In Nairobi, Kenya, Mercy Wambui Githumbi

Theses & Dissertations

Background: Chronic kidney disease (CKD) is a major health problem globally. In Africa, the burden in children remains unclear and is often reported as low. In developing countries, it is mainly due to secondary causes and nephrotic syndrome, while in the developed countries it is mainly due to congenital anomalies of kidney and urinary tract (CAKUT). The Kidney Disease: Improving Global Outcomes (KDIGO) defines CKD and utilises glomerular filtration rate (GFR) and albuminuria as an additional factor. Albuminuria is significant in prognostication of individuals with CKD as it is a marker of kidney damage. It is correlated with outcomes including …

Prevalence And Social Determinants Of Alcohol Use Disorders In Patients Attending Primary Care Clinics In Nairobi Kenya, Verah Kabwayi

Theses & Dissertations

No abstract provided.

Compliance To Imaging Follow Up Recommendations Among Patients With Bi-Rads 3 Breast Lesions, Florence Thuita

Theses & Dissertations

Background: The Breast Imaging Reporting and Data System 3 (BI-RADS 3) category is assigned to lesions which are deemed to be probably benign on breast imaging with a low likelihood of malignancy (≤2%). With regular imaging follow-up, this category is intended to reduce the rate of invasive biopsies while enabling early detection of breast cancer. However, imaging follow-up has been reported to be challenging to both radiologists and referring clinicians in terms of its appropriate use on the various imaging modalities and understanding management of the patients in this category. Furthermore, it has been reported to induce patient anxiety …

Secondary Hyperparathyroidism And Its Clinical And Biochemical Associated Factors In Patients On Maintenance Hemodialysis In Dar Es Salaam, Doris Samwel

Theses & Dissertations

Background:

Chronic kidney disease affects 13.6% of adult people in Tanzania. Secondary hyperparathyroidism is associated with an increase in disability-adjusted life years, cardiovascular mortality, and all-cause mortality worldwide especially in patients on maintenance hemodialysis. Justification: In Tanzania, there is a lack of prevalence data of secondary hyperparathyroidism and the factors associated with it. Knowing the factors associated with it will help in the early screening of our patients and intervene early before its complications arise.

Objectives:

This study aimed to assess the magnitude of secondary hyperparathyroidism and its association with clinical and biochemical variables and further to measure the association …

Patients’ Perceptions And Understanding Of Pre-Operative Informed Consent In Tertiary Care Setting- Dar-Es-Salaam, Steven Michael Esanju

Theses & Dissertations

Background:

Informed consent under the ethical principle of autonomy demonstrates patient’s agreement to have procedure/intervention done to them. Considering its importance in safeguarding human rights and autonomy, it is now mandatory to take informed consent before any surgery/procedure. Many studies have questioned whether informed consent is being taken in tr ue spirit that ensures proper understanding of the disclosed information or it is just adhered to as a medico legal formality. Globally, studies have demonstrated that majority of patients do not fully understand even small matters regarding their health i ncluding diagnosis, treatment modalities and possible associated risks, because of …

Knowledge, Attitudes And Practice Of Venous Thromboembolism Risk Assessment Among Surgical Doctors In Tanzania, Biswalo Mugeta Yango

Theses & Dissertations

Introduction

Surgical patients are at increased risk of venous thromboembolism due to the nature of their conditions and treatments. The incidence ranges from 61.3% to 64.9% in developed countries, compared to 43% in Africa. Although venous thromboembolism is fatal, it is potentially preventable. Physician-implemented risk assessment models reduce events by 70%. No country in sub-Sahara Africa has implemented a national venous thromboembolism risk assessment guideline. The subsequent burden is probably a reflection of low awareness and knowledge, negative attitudes, and substandard practice among physicians towards risk assessment. Justification In the current study, we assessed Tanzanian surgical doctors' knowledge, attitudes, and …

Clinical Presentations Associated With Adverse Outcomes Among Patients Admitted With Dengue At A Tertiary Hospital In Dar Es Salaam., Nakiganda John Mkasa

Theses & Dissertations

Introduction

Dengue is one of the most important mosquito viral borne infections caused by four viral serotypes (DENV 1-4). In 2019 WHO named dengue as among the top ten global threats due to an increase in the number of cases worldwide. Tanzania is among the countries in Africa with multiple outbreaks; 2010, 2013-2014, and 2019. Dengue has variable clinical presentations ranging from nonspecific such as fever, joint pain, and fatigue to more serious such as hemorrhage and shock. Dengue can result in adverse outcomes such as ICU admissions and prolonged hospital stays. Clinical presentations associated with adverse outcomes have been …

Clinicians’ Perceptions Of Pediatric Assent For Invasive Bedside Procedures At Three Tertiary Referral Hospitals In Nairobi County, Kenya., Grace Petrine Oyito Omondi

Theses & Dissertations

Background: The medical profession is built on the foundation of morals and ethics guided by principles of beneficence, non- maleficence, autonomy and justice. In order for an individual to be sufficiently autonomous, the value of information is indispensable. The information allows the patient to make an informed decision concerning their healthcare. The patient then gives an informed consent or assent as is applicable to the pediatric population. Majority of the studies surrounding pediatric assent revolves around obtaining it for research. There is a paucity of literature in regards to pediatric assent for clinical treatment more so as regards clinicians’ …

Immunophenotypic Expression Profile Of Multiple Myeloma Cases At A Tertiary Hospital In Nairobi, Kenya, Isabella Chelagat Mengich

Theses & Dissertations

Background; Multiple myeloma (MM) is a heterogeneous disease with variable patient outcomes ranging from indolent to aggressive disease. GLOBOCAN data places Kenya amongst the top five African countries for MM incidence and MM-related mortality. Aberrant expression of CD56, CD117, Cyclin D1 and Ki-67 on neoplastic plasma cells has been demonstrated to be useful in disease prognostication. However, majority of the data on MM comes from western countries. The significance of expression of this markers is uncertain in our population. The aim of this study was to determine the immunophenotypic expression profile of CD56, CD117, Cyclin D1 and Ki-67 in a …

Mucin And Splice Variant Profiles Of Pancreatic Adenocarcinoma Predict Patient Survival And Subtyping, Christopher M. Thompson

Theses & Dissertations

PDAC is a pancreatic epithelial malignancy and demonstrates aggressive progression and bleak patient prognosis. Despite decades of research, the evolution of novel diagnostics and intervention modalities for PDAC is stagnant. This dissertation explores the characteristic aberrant and elevated expression of mucins in PDAC. Beginning with the hypothesis that mucins are associated with disease aggressiveness, analysis of PDAC patient survival in TCGA revealed no associations between single mucin expression and patient survival. This led to the underlying issue of PDAC tumor cellularity since this disease demonstrates variability in the proportion of cancer cells within the tumor. Tumor purity assessed with the …

Fire Service Covid-19 Infection Prevention And Control Policy Comparison, Saaddedine Dichari

Theses & Dissertations

To date, there have been over 2.7 million deaths and more than 126 million cases attributed to the COVID-19 pandemic (JHU, 2021). This pandemic has affected nearly every aspect of daily life. Among those impacted are U.S. firefighters, as they provide many services beyond simply extinguishing structure fires and are frequently dual certified as emergency medical technicians. Many of the victims of this pandemic have relied on first responders to provide them with emergency medical care and hospital transport. When caring for these infected patients, firefighters have an increased risk of exposure and must be provided with adequate …

Biomedical Porcine Models For The Study Of Surgical Hemostasis, Hindlimb Ischemia, And Pancreatic Cancer, Shruthishree Aravind

Theses & Dissertations

Murine models have dominated the world of biomedical research and comparative medicine since their development in the early 1900s. [1] While they may be suitable models to study proteomics and genomics, they may not serve as effective translational models. [2-4] Murine models do not accurately model the pathophysiology of human disease and are limited by their size, application of medical imaging and intervention, which reduces their overall preclinical predictive value. [2-4]

Porcine models on the other hand, are slowly and steadily bridging the gap between murine models and human patients. [5] Pigs …