Medicine and Health Sciences Commons^™

From Inner Segment To Outer Segment: Palmitoylation Of Photoreceptor Na+, K+-Atpase And The Importance Of Prcd In Photoreceptor Outer Segment Morphogenesis, Emily R. Sechrest

Graduate Theses, Dissertations, and Problem Reports (ETD)

Photoreceptors are specialized neuroepithelial cells which are optimized for efficient capture of light and initiation of visual transduction. These cells have several compartments which are very important for proper visual function and segregation of cellular processes, including the outer segment (OS), inner segment (IS), nucleus, and synapse. The IS houses all of the cellular organelles and biosynthetic molecular machinery the cell requires and is the site of protein synthesis. The light-sensing OS is a highly modified, primary cilium, which contains many stacks of double membranous discs which house proteins required for formation and maintenance of OS structure, as well as …

Optimizing A Pediatric Dka Protocol In A Tertiary Care Hospital System In Northern West Virginia, Jennifer L. Burky

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background: Diabetic ketoacidosis (DKA) is a serious complication of diabetes that occurs when the body compensates for insufficient insulin, producing dangerously high levels of ketones. Without proper treatment, DKA can be fatal. For that reason, staff in the pediatric intensive care unit (PICU) at a tertiary care hospital in northern West Virginia expressed concerns about the complexity of and lack of adherence to a poorly referenced and dated DKA treatment protocol.

Objective: The purpose of this project was to assess the feasibility and sustainability of optimizing the DKA protocol in the PICU. The primary objective was to implement an updated, …

Differences In Smoking Behaviors And Readiness To Change For Patients With Copd And Differing Categories Of Depression, Jessica M. Floyd

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background: Chronic obstructive pulmonary disease (COPD) is the third leading cause of death in the world. Depression is a common comorbidity of COPD and affects patient outcomes and smoking cessation. The purpose of this study was to explore and describe factors influencing smoking behaviors and readiness to change in patients with comorbid COPD and depression.

Aims: The research question that guided this study was, “What are the relationships among smoking, COPD, and depression?” The following aims stemmed from the research question: to describe the characteristics of a convenience sample of people living with COPD and differing categories of depression who …

Novel Mechanisms Of Neuronal And Hormonal Regulation Of Large Intestinal Electrolyte Transport, Andrew John Nickerson

Graduate Theses, Dissertations, and Problem Reports (ETD)

The mammalian colon plays a vital role in maintaining overall electrolyte and fluid homeostasis in the body, and it possesses the ability to either secrete or absorb water depending upon the needs of the organism. Secretion or absorption of electrolyte ions, such as Na⁺, Cl^- and K⁺, drives the movement of water across the colonic epithelium – the inner gut lining where all transport takes place. Aberrant absorptive and/or secretory activity within the colonic epithelium is central to the pathogenesis of many gastrointestinal diseases, such as irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), constipation …

Targeting Calcium Homeostasis For The Treatment Of Multiple Myeloma, Osama M. Elzamzamy

Graduate Theses, Dissertations, and Problem Reports (ETD)

Multiple myeloma (MM) is a hematological malignancy characterized by the neoplastic proliferation of the plasma cells. MM is a relatively rare cancer that accounts for about 1.8% of all cancers and is the second most common hematologic malignancies, and despite the advancement from untreatable to treatable malignancy, it is yet incurable. Calcium ions (Ca²⁺) play an important role as second messengers in regulating a plethora of physiological and pathological processes, hence cytoplasmic Ca²⁺ is tightly regulated with strict spatial and temporal control to initiate, maintain, and terminate appropriate signaling pathways and phenotypes including cellular proliferation, cell cycle …

Investigations On Novel Cyp26a1/B1 Inhibitor, Dx308: Using Atra Response As A Theraputic Target For Traumatic Brain Injury And Parkinson’S Disease, Jacob Morgan Leatherwood

Graduate Student Theses, Dissertations, & Professional Papers

Neurodegenerative diseases (NDs) take a wide spectrum of pathologies and have a tendency to present themselves later in life. Neurodegenerative diseases affect 6 million Americans annually with ~1 million currently living with Parkinson’s disease (PD). One of the greatest contributors to the pathogenesis of neurodegenerative diseases is the occurrence of a traumatic brain injury (TBI) during life.

All-trans-retinoic acid (atRA) is the active metabolite of Vitamin A. The retinoic acid pathway is known to be activated following TBI and is reduced in PD patients. Previous studies found a decrease in inflammation and behavioral deficits following administration of Vitamin …

A Comparison Of Outcomes Of A Home-Based Cardiac Rehabilitation Program As An Alternative To Traditional Outpatient Phase Ii Cardiac Rehabilitation, Colton M.R. Crismore

Graduate Student Theses, Dissertations, & Professional Papers

Phase II outpatient cardiac rehabilitation (CR) is an intervention offered to patients that have been diagnosed with heart disease, undergone various procedures such as stenting or valve replacement, or to those with claudication diseases. Home-based cardiac rehabilitation (HBCR) is an alternative approach to traditional outpatient phase II CR, that is an emergent area of study with preliminary evidence showing in some outcomes that it approximates traditional CR. As there is current interest in the study of HBCR, this paper examines outcomes of mortality, risk factor modification, exercise capacity, and cardiac function to determine the extent to which this intervention may …

The Medicalisation Of Gender Nonconformity Through Language: A Keywords Analysis, Angelo Cosma Galluzzo

sprinkle: an undergraduate journal of feminist and queer studies

Language is an important part of the way gender nonconformity is legislated and medicalised. In 2012, the American Psychiatric Association (APA) changed the nomenclature of the ‘gender identity disorder’ (GID) to ‘gender dysphoria in the ‘Diagnostic and Statistical Manual of Mental Disorders (DSM) to reduce the social stigma attached to transgender identities. While the recognition of gender nonconformity by the medical authorities has led to some beneficial consequences, scholars have shown that the language of pathology has narrowed the definitions of gender nonconformity and has created social stigma. I use the web pages of five major health providers of English-speaking …

Combined Influence Of Transfer Distance, Pace, Handled Mass And Box Height On Spine Loading And Posture, Xavier Robert-Lachaine, Philippe Corbeil, Antoine Muller, Jasmin Vallée-Marcotte, Hakim Mecheri, Denys Denis, André Plamondon

Études primaires

Work-related low back disorders are commonly associated with handling tasks. The objective of this study was to determine the combined influence of distance, pace, handled mass and height, on back loading and posture during free box transfer. Kinematics and kinetics of 17 handlers were recorded during a box transfer task between two pallets. Four-way repeated measures ANOVA were conducted on four lift-deposit height conditions (from lift and deposit of 0.16 or 1.16 m), three distances between pallets (1.5, 1.0 and 0.5 m), two handled masses (10 and 20 kg) and two paces (free and faster). The interaction between distance and …

Combined Puncture And Cutting Of Soft-Coated Fabrics By A Pointed Blade: Energy, Force, And Stress Failure Criteria, Ennouri Triki, Chantal Gauvin

Études primaires

Soft elastomer-coated fabrics are widely used in engineering and protective applications. Puncture cutting by sharp-tipped objects is one of the most common failure modes of protective gloves made of coated fabrics. In order to investigate the puncture-cutting process of soft elastomer-coated fabrics, we studied the mechanisms and mechanics of pointed-blade insertion into specimens cut out from four protective gloves. Experimental and analytical analyses showed that total energy and critical puncture-cutting force calculated analytically are both able to predict the puncture-cutting resistance of soft elastomer-coated fabrics measured experimentally. Total energy is obtained from the relationship between the puncture-cutting work and the …

Leakage Versus Material Filtration In Barrier Facemask Efficiency, Ali Bahloul, Clothilde Brochot, Barbara Layne

Études primaires

The World Health Association and many governmental agencies recommend the wearing of facemasks by the general public to prevent the spread of COVID-19. It is believed that masks can significantly protect others and may offer some protection to the wearer. Although there are standards for FFRs, surgical masks, and recently for barrier face coverings, they all indicate the level of protection for the wearer. However, testing facial masks not at the point of inhalation, but at the source, the exhale, offers a new perspective on how to impede particle emissions. In this paper, the experimental results show that, although the …

Numerical Investigation Of The Earplug Contribution To The Low-Frequency Objective Occlusion Effect Induced By Bone-Conducted Stimulation, Kevin Carillo, Olivier Doutres, Franck Sgard

Études primaires

The use of earplugs is commonly associated with an increased perception of the bone-conducted part of one's own physiological noise. This phenomenon is referred to as occlusion effect and is most prominent at low frequencies. Several factors influence the occlusion effect, such as the ear anatomy; the bone-conducted stimulation; and the type of occlusion device and its fit, insertion depth, and material properties. The latter factor is of great interest to potentially reduce the occlusion effect of passive earplugs. This paper investigates the mechanism(s) of contribution of earplugs to the objective occlusion effect. A two-dimensional axi-symmetric finite element model of …

Occupational Exposure To Antineoplastic Drugs: What About Hospital Sanitation Personnel?, France Labrèche, Capucine Ouellet, Brigitte Roberge, Nicolas J Caron, Ahmed Yennek, Jean-François Bussières

Études primaires

Objective

Occupational exposure to antineoplastic drugs (ANPs) occurs mainly through dermal contact. Our study was set up to assess the potential exposure of hospital sanitation (HS) personnel, for whom almost no data are available, through contamination of surfaces they regularly touch.

Methods

In the oncology departments of two hospitals around Montreal, surface wipe samples of 120–2000 cm² were taken at 10 sites cleaned by the HS personnel and five other sites frequently touched by nursing and pharmacy personnel. A few hand wipe samples were collected to explore skin contamination. Wipes were analyzed by ultra-performance liquid chromatography tandem–mass spectrometry for …

On The Removal Of The Open Earcanal High-Pass Filter Effect Due To Its Occlusion: A Bone-Conduction Occlusion Effect Theory, Kevin Carillo, Olivier Doutres, Franck Sgard

Études primaires

The occlusion effect is commonly experienced by in-ear device wearers as an increased loudness sensation of bone-conducted low frequency sounds. A widespread theory proposed by Tonndorf and based on a simplified electro-acoustic model describes the phenomenon as the removal of the open earcanal high-pass filter effect due to a perfect or partial occlusion. However, this filter has not been clearly defined and several ambiguities remain. Revisiting the model, a second order high-pass filter effect for the volume velocity transferred between the earcanal wall and the eardrum is highlighted. This filter remains for partial occlusion but vanishes for perfect occlusion. In …

Simulation Of The Objective Occlusion Effect Induced By Bone-Conducted Stimulation Using A Three-Dimensional Finite-Element Model Of A Human Head, Huiyang Xu, Franck Sgard, Kévin Carillo, Éric Wagnac, Jacques De Guise

Études primaires

The occlusion effect (OE) refers to the phenomenon that more bone-conducted physiological sounds are transmitted into the earcanal when it is blocked and may cause discomfort on users of hearing protection devices. Models have been proposed to study the OE as they can help understand the physical mechanisms and can be used to evaluate the individual contribution on the OE of the factors that may affect it (i.e., occlusion device, ear anatomy, and stimulation). The existing finite element models developed to study the OE are limited by their truncated ear geometries. In order to progress in the understanding of the …

Structural Remodeling Of The Lumbar Multifidus, Thoracolumbar Fascia And Lateral Abdominal Wall Perimuscular Connective Tissues: A Search For Its Potential Determinants, Christian Larivière, Sharon M. Henry, Richard Preuss

Études primaires

Recently remodeling of lumbar soft tissues has received increased research attention. However, the major determinants that influence remodeling need to be elucidated in order to understand the impact of different rehabilitation modalities on tissue remodeling. The main aim of this study was to explore the between-subject variance of different measures of lumbar soft tissues quantified with rehabilitative ultrasound imaging (RUSI). RUSI measures (n = 8) were collected from 30 subjects without and 34 patients with LBP: (1) lumbar multifidus (LM) echogenicity (fatty infiltration/fibrosis) at three vertebral levels (L3/L4, L4/L5 and L5/S1) (n = 3); (2) posterior layer thickness …

The Effect Of Extensible And Non-Extensible Lumbosacral Orthoses On Anticipatory Postural Adjustments In Participants With Low Back Pain And Healthy Controls, Christian Larivière, Richard Preuss

Études primaires

Background

Wearing a lumbosacral orthosis (LSO) is known to influence spine mechanics, but less is known about how LSOs affect motor control. Whether the use of a LSO can negatively affect motor control of the lumbar spine is still under debate.

Objective

The current study examined the immediate effects of two flexible LSOs (extensible and non-extensible) on the anticipatory postural adjustments that prepare the spine for a predictable perturbation.

Design

A comparative study using a repeated measures design in a laboratory setting.

Methods

Healthy controls (n = 20) and participants with low back pain (n = 40) performed a rapid …

Exploring The Influence Of Self-Efficacy And Autonomy On Outdoor Recreation Behaviors During The Covid-19 Pandemic, Katheryn E. Carpenter

Graduate Theses/Dissertations

Outdoor Recreation (OR) provides the benefits of physical activity and traditional leisure along with the addition of the benefits associated with an outdoor environment. Self Determination Theory (SDT) and Social Cognitive Theory (SCT) state that self-efficacy (SE) and autonomy can increase depending on the physical and social environment. The purpose of this study was to explore the relationship between self-efficacy and autonomy on OR behaviors during the COVID-19 pandemic. It was hypothesized there would be a correlation between individuals who participate in OR activities and self-efficacy as well as autonomy. The research also explored barriers and facilitators to OR via …

Resilience Of Regional Hospital Nursing Staff Working During The Covid-19 Pandemic Measured By The Connor-Davidson Resilience Scale., Jill Petzel

MaineHealth Maine Medical Center

As the COVID-19 pandemic stretches on, the importance of resilience is increasing as it protects against PTSD while aiding an individual in selecting healthy coping strategies. In a study of 657 healthcare workers in New York City in April 2020, more than half of healthcare workers screened positive for acute stress (PTSD symptoms), almost half screened positive for depression, and one third screened positive for anxiety; many also reported symptoms of insomnia (Schecter et al., 2020).

Resilience is important in nursing because it ensures a viable, healthy workforce for the future. Resilience has been described as the ability to ‘bounce …

Occult Hepatitis B Virus Infection In A Kenyan Cohort Of Hiv Infected Anti-Retroviral Therapy Naïve Adults, Adil Salyani, Jasmit Shah, Rodney Adam, George Otieno, Evelyn Mbugua, Reena Shah

Internal Medicine, East Africa

Background: Occult hepatitis B virus (HBV) infection (OBI) is a phase of HBV infection characterised by the presence of HBV DNA in the absence of detectable hepatitis B surface antigen (HBsAg). OBI is of concern in the HIV-infected due to high prevalence and risk of HBV reactivation. The prevalence and clinico-demographic characteristics of OBI in anti-retroviral therapy (ART) naïve HIV infected adults in Kenya is unknown.

Methods: A cross sectional study carried was out at three sites in Kenya. HIV infected ART naïve adults were enrolled and demographic data collected. Blood samples were assayed for HBsAg, HBV DNA, alanine aminotransferase, …

Effective Monitoring Of Diabetic Patients On Progressive Chronic Kidney Disease Among Patients Attending Diabetic Clinic At Muhimbili National Hospital, Tanzania, Gudila Valentine Shirima, Paschal Ruggajo, Obadia Venance Nyongole, Francis Furia, Kimu Marko Njiku

Internal Medicine, East Africa

Background:

Diabetic Kidney Disease is a complication of Diabetes Mellitus (DM) following the natural history of diabetes. Worldwide up to 40 % of patients with diabetes mellitus will develop Diabetic Kidney Disease. Kidney Disease Outcome Quality Initiative (KDOQI) guidelines recommends monitoring for proteinuria, blood sugar, renal functions and blood pressure in the patients with DM so that progression to complications including renal failure is prevented. Our study aimed to audit on effective monitoring of progressive chronic kidney disease among patients attending diabetic clinic at Muhimbili National Hospital.

Material and methods:

This was a retrospective clinical audit which included patients who …

Smart Watch Detection Of Supraventricular Tachycardia (Svt): First Case From Tanzania, Nadeem Kassam, Omar Aziz, Eric Aghan, Samina Somji, Hanifa Mbithe, Mustaafa Bapumia, Robert Mvungi, Salim Sarani

Internal Medicine, East Africa

Smartwatches like the Apple Watch have been on the rise worldwide and their use is gaining popularity in developing countries. Their ability to detect dysrhythmias is well documented. Present practice discourages the use of these devices as a diagnostic tool. Nevertheless, atypical findings from these devices should be clinically investigated. This case demonstrates an eventual diagnosis of supraventricular tachycardia (SVT) based on an Apple watch alert which was subsequently confirmed by electrophysiological evaluation.

Seroprevalence Of Hepatitis B Virus Infection, Anti-Hcv Antibodies And Hiv And Knowledge Among People Who Use Drugs Attending Methadone Therapy Clinic In Tanzania: A Cross-Sectional Study, Semvua B. Kilonzo, Daniel I. W Gunda, David C. Majinge, Hyasinta Jaka, Paulina M. Manyiri, Fredrick Kalokola, Grahame Mtui, Elichilia R. Shao, Fatma Bakshi, Alex Stephano

Internal Medicine, East Africa

Background: Methadone therapy clinics have been recently introduced in Tanzania, aiming at reducing risk behaviors and infection rates of viral hepatitis and HIV among people who use drugs. The objective of this study was to estimate the prevalence, associated factors and knowledge level of these conditions among people who use drugs attending a methadone clinic in Tanzania.

Methods: We enrolled 253 People who using drugs receiving Methadone therapy. Clinical data was retrospectively collected from the medical records and face-to face interviews were conducted to determine the behavioral risk factors and respondents’ knowledge on viral hepatitis and HIV.

Results: An overall …

Prevalence Of Incidental Prostate Carcinoma Among Patients Undergoing Turp For Benign Prostatic Enlargement, Isaac H. Mawalla, Masawa Nyamuryekung’E, Authar Ali, Aidan Njau, Philip Adebayo, Ali A. Zehri

Internal Medicine, East Africa

Background: Incidental prostate cancer is detected by histological examination of resected biopsy tissue that has been previously diagnosed as benign. It has the potential for progressing to become a disease necessitating active treatment. There is paucity of data on detection of incidental prostate cancer in Tanzania. A study done in northern Tanzania among the urban public sector revealed an alarming detection rate of 21.71%. We aimed to establish the prevalence of incidental prostate cancer among men surgically treated for benign prostate enlargement with considered normal range of prostate specific antigen.

Methods: This was a retrospective hospital-based cross-sectional study conducted to …

Perceptions Of Integrated Mental And Behavioral Health In Pediatric Specialty Care Settings: A Mixed-Methods Study, Desireé Nicole Williford

Graduate Theses, Dissertations, and Problem Reports (ETD)

Pediatric patients are at an increased risk of experiencing mental and behavioral health concerns, which have direct associations with HRQOL, physiological health, and likelihood that youth will engage in health promoting behavior. Researchers and practitioners have increased their awareness of these concerns and identified strategies for improving the mental and behavioral health of these youth, specifically via implementing organizational efforts (i.e., task forces) and guidelines around integrating psychosocial screening and other services into routine practice. Despite this, there are several identified barriers to families receiving mental/behavioral health care in these settings. These barriers exist at all levels, including at the …

Observational Measurement Of Attachment In Toddlers With Disruptive Behavior Using The Strange Situation Procedure And Attachment Q-Set, Corey C. Lieneman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Child-caregiver attachment is an important factor in healthy child development and is often targeted by early intervention programs. To assess the efficacy of these interventions, attachment must be accurately measured across the toddler years in populations referred for treatment of externalizing behavior problems. The Strange Situation Procedure (SSP; Ainsworth et al., 1978) and Attachment Q-Set (AQS; Waters, 1987) are empirically-validated measures of child-caregiver attachment, each with unique strengths and weaknesses. Previous research has reached mixed conclusions on relations between the observer-report AQS and SSP, depending on sample and study characteristics, and a review of the literature did not produce any …

Perceived Neighborhood Characteristics And Parental Role In Physical Activity Of African American Youth, Kashica Webber-Ritchey, Elizabeth A. Moxley, Sungsoon Hwang, Desale Habtzghi, Sai Yalla

Faculty Articles, Papers, and Other Scholarship

Introduction: Lack of physical activity (PA) serves as one of the contributing factors to pediatric obesity in African American (AA) youth.

Objective: Further examination of the Social Ecological Model [SEM] influences on PA in AA youth is vital. The purpose of this pilot study is to explore environmental factors, built environment (BE) and parental role, in PA promotion.

Methods: Using mixed method data collection, a convenience sample of 28 AA parents/caregivers of school-aged children (6-12 years) enrolled in Chicago Youth Programs (CYP) completed an online survey. Parents/caregivers along with their child participated in focus group sessions (n=18 parent/child dyads). …

Global Impact Of Physical Inactivity And Implications For Public Health Nursing, Elizabeth A. Moxley, Kashica Webber-Ritchey, Laura Hayman

Faculty Articles, Papers, and Other Scholarship

Physical inactivity has been a public health problem worldwide for more than a decade. Of those who are physically active, a substantial percentage engage solely in low or very low physical activity (PA) levels. In the last 3 decades, the prevalence of PA in the United States has decreased with approximately 80% of adults not meeting the recommended guidelines for aerobic and muscle strengthening PA. The PA levels of youth have dramatically decreasedwith 85% of adolescents reporting no PA. Regular PA participation can aid in preventing chronic diseases. A strong inverse dose-response relationship exists between PA and the incidence of …

Virtual Pedagogical Strategies And Hesi Student Outcomes In Response To Covid-19, Elizabeth A. Moxley, Anitha Saravanan, Larinda Dixon, Janice Miller, Maureen Waller

Faculty Articles, Papers, and Other Scholarship

Background: To maintain curricular integrity in response to COVID-19, nurse educators are increasingly required to transition from traditional (face-to-face) to virtual pedagogy. Objectives: The purpose of this analysis was to compare the HESI scores based on a traditional pedagogy with the HESI scores following implementation of virtual pedagogy during Spring 2020. Methods: Student (n = 115; 81% female; mean age = 25.71 years) HESI scores were compared after each eightweek session using the Mann Whitney U test, permutation test and Wilcoxon rank test. Logistic regression was used to identify students achieving at least 850. Chi-square test was used to determine …

A Lesson Involving Nursing Management Of Diabetes Care: Incorporating Simulation In Didactic Instruction To Prepare Students For Entry-Level Practice, Elizabeth A. Moxley, Larry Maturin Jr., Desale Habtzghi

Faculty Articles, Papers, and Other Scholarship

Background: Diabetes is a global health problem requiring nursing students demonstrate a thorough understanding for NCLEX^® and entry-level practice, although clinical opportunities are increasingly limited, especially for Associate Degree Programs.

Method: A Simulation-based Education was incorporated in a didactic lesson to improve diabetes nursing care. Knowledge, confidence, application and relevance were measured using Wilcoxon signed-rank, Chi-square and Kruskal-Wallis analyses.

Results: Student (n=46, 85% female) perceived knowledge of glycemic management (post > pre, p < 0.0001), confidence administering insulin (post > pre, p < 0.0001), and clinical relevance improved. Confidence increased among three cohorts per Kruskal Wallis H test (² = 7.76, p = 0.021). Increased confidence correlated with relevance (² = 30.965, p = 0.009) and prior understanding of therapy ( …