Medicine and Health Sciences Commons^™

A Randomized Controlled Trial Comparing The Proportion Of Hypoxia In Sedated Adults Undergoing Upper Gastrointestinal Endoscopy Using Target Controlled Infusion Of Propofol Versus Intermittent Boluses., Catherine Ndosi

Theses & Dissertations

Background: A wide variety of sedation techniques are employed to facilitate various invasive diagnostic and therapeutic procedures. Increasingly, propofol is emerging as the preferred sedative agent. Traditionally, it has been administered as intermittent boluses to achieve deep sedation to facilitate gastrointestinal endoscopy. Propofol target controlled infusion can be employed to provide suitably conducive conditions for this purpose.

Objective: The primary objective sought to compare the proportion of hypoxia between the study group receiving intermittent boluses of propofol at 0.25mg/kg as needed, and the other receiving target-controlled infusion of propofol at 2.5mcg/ml during upper gastrointestinal endoscopy. The secondary objectives were to …

Prevalence Of Double Myc/Bcl2 Expression And The Cell Of Origin In Diffuse Large B-Cell Lymphomas Diagnosed At A Tertiary Level Referral Laboratory, Jonathan Wawire

Theses & Dissertations

Introduction: Diffuse large B-cell lymphoma (DLBCL) is the most commonly diagnosed non-Hodgkin’s lymphoma in adults worldwide. In Kenya DLBCL accounts for 64% of all non-Hodgkin’s lymphomas diagnosed in adults. It is a heterogeneous disease and patients show varying outcomes despite standard treatment. This variability is attributed to the differences in the biology and molecular pathogenesis of DLBCL.

The five most important prognostic factors for DLBCL include scores for the revised international prognostic index (R-IPI), the cell of origin (COO), presence of myelocytomatosis (MYC) and B-cell lymphoma 2 (BCL2) gene rearrangements by fluorescent in situ hybridisation (FISH) or …

Diagnostic Accuracy Of Hba1c Test In Diagnosis Of Diabetes And Prediabetes In A Multiethnic Population At Aga Khan University Hospital, Nairobi., Francis Kiigu Wathigo

Theses & Dissertations

Introduction: Diabetes mellitus is a metabolic disease characterized by hyperglycaemia secondary to impaired insulin secretion, impaired insulin action or both. In Kenya, an estimated 750,000 people are diabetic with more than 50% estimated to be unaware of their status.

Conventionally, diagnosis has been based on plasma glucose levels. In 2010, Haemoglobin A1c (HbA1c) was approved by the American Diabetes Association (ADA) and World Health Organisation (WHO) for diagnosis of diabetes. However, different studies have shown variations in diagnostic performance of HbA1c.

Research question: What is the diagnostic sensitivity and specificity of HbA1c in diagnosis of diabetes and prediabetes at Aga …

Comparison Of Image Quality In High Pitch Free Breathing Versus Standard Pitch Breath-Holding Computed Tomographic Pulmonary Angiography., Kevin Onyinkwa Ombati

Theses & Dissertations

Background: Pulmonary embolism (PE) is the third most common acute cardiovascular disease. Missed diagnosis is responsible for most preventable deaths associated with PE. Artefacts from cardiac and breathing motion are a main pitfall. Advances in Computed Tomographic imaging have enabled rapid imaging in an attempt to overcome these pitfalls.

Objective: To compare image quality when using high pitch free breathing versus standard pitch breath holding Computed Tomographic Pulmonary Angiography (CTPA) using a dual source scanner.

Methods: This was a randomised control trial whereby patients referred to the radiology department for CTPA examination for suspected pulmonary embolism were randomly selected into …

Comparison Of The Sensitivity Of Biomarker Based Matrix Assisted Laser Desorption Ionization-Time Of Flight Mass Spectrometry (Maldi-Tof Ms) And Conventional Methods In The Identification Of Clinically Relevant Bacteria And Yeast, Ali Abdow Kassim

Theses & Dissertations

Background: MALDI-TOF MS is an analytical method that has recently become integral in the identification of microorganisms in clinical laboratories. It relies on databases that majorly employ pattern recognition or fingerprinting. Biomarker based databases have also been developed and there is optimism that these may be superior to pattern recognition based databases. This study compared the performance of ribosomal biomarker based MALDI-TOF MS and conventional methods in the identification of selected bacteria and yeast.

Methodology: The study was a cross sectional study carried out in collaboration with the Swiss Tropical and Public Health Institute, Switzerland and Mabritec laboratory, Riehen, Switzerland. …

Immunohistochemical P21 Expression In Breast Cancer: Association With Patient And Tumour Characteristics, Benjamin N. Njihia

Theses & Dissertations

Introduction: Molecular characterisation of the breast cancer has allowed for targeted therapies that are improving outcomes. The gains achieved by these treatments have fuelled the search for other targets, including cyclin-dependent kinase inhibitors such as p21. p21 expression in breast cancer has been shown to be variably associated with clinical and pathological parameters in different populations. It is possible that either methodological or biological differences underlie these variations.

Objective: The current study sought to determine the association of p21 expression and clinico-pathological parameters in breast cancer patients at the Aga Khan University Hospital in Nairobi, Kenya.

Methods: Clinically annotated tissue …

Prevalence Of Non-Alcoholic Fatty Liver Disease In Overweight And Obese Children Seeking Ambulatory Health Services In Nairobi, Anne Njeri Mburu

Theses & Dissertations

Introduction: Non-alcoholic fatty liver disease is often an asymptomatic condition one of the leading causes of chronic liver disease and is associated with an increase in cardiovascular morbidity. Being overweight or obese has been positively linked to non-alcoholic fatty liver disease in children. There is evidence to show that when detected early, non-alcoholic fatty liver disease is reversible primarily upon institution of lifestyle changes targeted at weight reduction.

Establishing the prevalence of non-alcoholic fatty liver disease in overweight and obese Kenyan children would serve as a benchmark for long term monitoring of associated morbidity and guide in public health policies …

Effect Of Laryngeal Mask Airway Manometry On Post-Operative Sore Throat In Spontaneously Breathing Adult Patients Presenting For Surgery At Aga Khan University Hospital, Nairobi, David Njoroge Waruingi

Theses & Dissertations

Background: Laryngeal mask airways (LMAs) are widely used in anaesthesia and are considered to be generally safe. Postoperative sore throat (POST) is a frequent complication following LMA use and can be very distressing to patients. The use of an LMA cuff pressure of between 30 and 32cm of H20 in alleviating postoperative sore throat has not been investigated.

Primary objective: To compare the occurrence of POST between the intervention group in which LMA cuff pressures will be adjusted to 30-32cm of H20 and the control group in which only monitoring of LMA cuff pressures will be done.

Secondary Objectives: To …

Residents’ Perception On The Need For Clinical Leadership Training At The Aga Khan University, Nairobi, Lance Mayabi

Theses & Dissertations

Background:The healthcare environment is becoming increasingly complex with physicians undertaking more leadership roles. The majority of physicians are not prepared to take up these roles, despite evolving evidence that good clinical leadership yields better clinical outcomes for both patients and healthcare organizations. Further, few residency programs explicitly embed leadership training for their students despite their positions at the forefront of healthcare delivery. This deficit ultimately leaves a multilevel healthcare “leadership” gap in a sector that depends heavily on the education process to improve clinical outcomes.

A pre-study survey of residency graduates at the Aga Khan University, Nairobi (AKU,N) undertaken …

The Association Between Asymptomatic And Mild Neurocognitive Impairment And Adherence To Antiretroviral Therapy Amongst People Living With Hiv, Violet Maloba Awori

Theses & Dissertations

Background: HIV disease is associated with neurocognitive impairment which is one of the neurological complications of the viral infection. The spectrum of HIV Associated neurocognitive impairment has significantly changed since the advent of ART. The inclusion of the asymptomatic but cognitively impaired population of patients has changed the dynamics of this population, and requires further research to identify the impact it has on the progression of the disease as well as on any other aspects. Poor adherence to ART is one of the main causes of treatment failure and studies done previously point towards the milder forms of Neurocognitive Impairment …

Outcomes In Patients With Acute Coronary Syndromes At The Aga Khan University Hospital, Nairobi, Mohamed Hasham Varwani

Theses & Dissertations

Background: As the prevalence of cardiovascular diseases in Sub-Saharan Africa rises, coronary artery disease, with its acute presentations, is being increasingly recognized in Kenyans and treated at tertiary level hospitals. It is just over a decade since the introduction and wide availability of modern cardiology services, including interventional cardiology in Kenya.

Following an acute coronary syndrome (ACS), patients remain at high risk of death and other adverse events such as heart failure, recurrent myocardial infarction, stroke, and bleeding. Local and regional data on long-term outcomes following ACS are lacking. These data are important to clinicians for prognostication and to health …

Maternal Inflammatory Markers In The Diagnosis Of Chorioamnionitis And Prediction Of Neonatal Sepsis In Preterm Pre-Labour Rupture Of Membranes: A Systematic Review, Angela Koech Etyang

Theses & Dissertations

Background: There is no consensus on the potential role of inflammatory markers in identifying chorioamnionitis in women with Preterm Pre-labour Rupture of Membranes (PPROM) or in predicting Early Onset Neonatal Sepsis (EONS) in their neonates.

Objectives: To perform a quantitative review on the accuracy of maternal C reactive protein (CRP), Procalcitonin (PCT) and Interleukin 6 (IL6) in the diagnosis of Histological Chorioamnionitis and/or Funisitis (HCA/Funisitis) and their role in the prediction of EONS in PPROM.

Methods: MEDLINE, EMBASE and The Cochrane Library databases were searched from inception to October 2015, for studies where these markers were assessed against a reference …

Effect Of Low-Dose Ketamine Versus Fentanyl On Attenuating The Haemodynamic Response To Laryngoscopy And Endotracheal Intubation In Patients Undergoing General Anaesthesia At The Aga Khan University Hospital, Nairobi, Angela Ongewe

Theses & Dissertations

Background: The use of drugs to attenuate the haemodynamic response to laryngoscopy and endotracheal intubation is the standard of care during elective surgery. Current evidence is conflicting concerning the best agent and optimal dose for this purpose. In the majority of cases, Fentanyl is widely utilized to attenuate haemodynamic responses. Ketamine, an established available drug, has been scarcely studied in this regard at low doses and against varying doses of other common agents.

Objective: The primary objective was to compare the overall occurrence of hypertension and tachycardia immediately pre-intubation (post-induction) until 10 minutes post intubation between the study group receiving …

Comparison Of Weight Adjusted Dose Versus Fixed Dose Ondansetron In Preventing Shivering Following Spinal Anesthesia For Cesarean Deliveries, Moses Kimuri Gicheru

Theses & Dissertations

Background: Spinal anesthesia is an effective regional anesthesia technique, which is preferred in almost 86% of cesarean sections in the United States and United Kingdom. Eighty percent of cesarean sections done at the Aga Khan University hospital are under spinal anesthesia. Shivering is a common complication of spinal anesthesia, it occurs in 40%-64% of patients after neuraxial anesthesia. Shivering may cause maternal and fetal hypoxemia, maternal discomfort and a problem to the anesthesiologists when it comes to monitoring the patient during cesarean sections.

Ondansetron a 5-HT3 receptor antagonist is effective in treatment and prevention of post spinal anesthesia shivering. In …

Risk Factors, Clinico-Pathologic Characteristics And Outcomes In Young Kenyan Female Patients With Breast Cancer In Akuh-N, Gilford Mutwiri Mwikamba

Theses & Dissertations

Background: Breast cancer in the young refers to a diagnosis of breast cancer in a female under the age of forty years. This is considered a distinct disease with different risk factors, biology, and prognosis. Young age at breast cancer diagnosis is reportedly more common among African-Americans. The highest proportion of breast cancer in the young has been reported in Africa. Early detection of breast cancer in Africa is hampered by lack of access to health care services, appropriate screening tools, and high cost of magnetic resonance imaging for the high risk groups. Despite a worse prognosis, management of breast …

Effect Of Additional Lumbosacral Corset On The Outcome Of Patients With Non-Specific Acute Low Back Pain At The Aga Khan University Hospital, Nairobi, Stanley Aruyaru Mwenda

Theses & Dissertations

Introduction: Low back pain (LBP) is a common problem world over affecting 60-90% of the population in their lifetime. It is a leading reason for hospital admission, healthcare spending, workplace absenteeism and years lived with disability.

Up to 90% of patients suffering from low back pain do not have a serious pathology warranting imaging or further intervention besides symptom relief. These are categorized as having non- specific low back pain. This has a good prognosis running a short course of 3 to 6 weeks.

The management of non-specific acute LBP entails analgesia and non-pharmacologic interventions (back school and physical therapy). …

Factors That Influence Advance Directives Completion Amongst Terminally Ill Patients At Akuhn, Stephen Omondi Otieno

Theses & Dissertations

Background: An advance directive is a written or verbal document that legally stipulates a person’s health care preference while they are competent to make decisions for themselves, and which is then used to guide decisions on life-sustaining treatment in the event that they become incapacitated. Advance directives can take one of four forms: a living will, a limitation of care document, a do-not-resuscitate order, and an appointment of a surrogate by durable power of attorney. The completion rate of advance directives varies from region to region, and it is influenced by different patient, caregiver, legal, institutional, cultural, and religious factors. …

Prevalence Of Hepatic Steatosis As Diagnosed On Unenhanced Abdominal Ct, Naushad H. Karim Sokwalla

Theses & Dissertations

Background: Hepatic steatosis is the accumulation of triglycerides within hepatocytes. It may be broadly classified into alcoholic and non-alcoholic fatty liver disease, whereby non-alcoholic fatty liver disease is steatosis secondary to causes such as steatogenic medication. Liver biopsy remains the gold standard for diagnosis of hepatic steatosis. However, it is invasive and may potentially suffer from sampling errors. Hepatic steatosis may be diagnosed on unenhanced CT if the hepatic attenuation is less than 40 HU, or if the attenuation of the liver is at least 10 HU less than the spleen. Over the past three decades, non-alcoholic fatty liver disease …

Prevalence Of Bladder Dysfunction In Children With Primary Nocturnal Enuresis Presenting To The Hospital, Nikita Pravin Jethwa

Theses & Dissertations

Introduction: Bladder dysfunction is thought to be a common cause of nocturnal enuresis. It can either be overactive, underactive or dysfunctional. Currently, there is a paucity of data on what proportions of children with nocturnal enuresis have bladder dysfunction. Studies have shown the prevalence of bladder dysfunction to be as high as 77-94.5% (28), and children with bladder dysfunction have poor response to treatment. There are currently no protocols for investigating and managing children with nocturnal enuresis. The decision for bladder ultrasound is usually made by the primary physician, and at times after the child has been on treatment for …

Association Of 24-32wk Maternal Triglyceride Levels And Neonatal Birth Weight At The Aga Khan University Hospital, Demetrius Mududa Omondi

Theses & Dissertations

Introduction: The association of neonatal birth weight and mid-term maternal lipid levels has been demonstrated in several studies with elevated serum triglyceride levels shown to be a strong predictor of the large for gestational age baby/ fetal macrosomia. Maternal diabetes remains the strongest risk factor for developing a LGA/macrosomic baby explained by the Pederson hypothesis. However non-diabetic macrosomia is still an obstetric dilemma with the attendant fetal and maternal complications. This phenomenon could be explained by altered maternal lipid metabolism as lipids have been shown to be important for normal fetal growth and development.

Objective: Our primary objective was to …

Sonographic Estimation Of The Prevalence Of Hepatic Steatosis In Hiv Monoinfected Patients At Aga Khan University Nairobi., Bernadette Wambui Muthee

Theses & Dissertations

Introduction: Human immunodeficiency virus disease (HIV) is a worldwide health problem. It is estimated that 38.6 million people are infected with HIV globally. It has remained endemic in the African continent for close to 20 years and is a long term developmental challenge in Africa which bears 69 % of the HIV/AIDS global burden.

The introduction of highly active antiretroviral therapy (HAART) has caused dramatic improvement in prognosis of HIV disease. Consequently, this has resulted in substantial reduction in Acquired Immune Deficiency Syndrome (AIDS) related morbidity and mortality. In contrast, this has been accompanied by an upsurge in liver- related …

Association Between Immediate Postnatal Anaemia And Risk Of Developing Postpartum Depression At The Aga Khan University Hospital: A Cohort Study, John Ndungu Kimani

Theses & Dissertations

Introduction: Postpartum depression has significant burden on obstetric psychopathology. While risk factors for the same have been extensively studied, most of this studies have focused on the role of psychosocial factors. Data on the role of physiological variables such as anaemia and role of obstetric complications in postpartum depression is now emerging. There are still gaps in literature regarding the same in developing countries and in Africa.

Primary Objective: To determine the association between low postnatal hemoglobin and postpartum depression

Secondary Objective: To determine the association between obstetric complication specifically postpartum hemorrhage, operative delivery and NICU/NHDU admission and postpartum depression. …

The Diagnostic Accuracy Of Determine™ Tb Lam Antigen In Detection Of Extra Pulmonary Tuberculosis (Eptb), Fatimah Osman Juma

Theses & Dissertations

Background: TB remains a key global health challenge; particularly Extra pulmonary Tuberculosis (EPTB) and is also a major cause of morbidity and mortality in sub-Saharan Africa. The increasing incidence of EPTB compounded by difficulties in making a timely diagnosis portends to poor prognosis and increased mortality. Delays in diagnosis and misdiagnosis of EPTB in suspected patients account for mortality as well. Challenges in diagnosis of EPTB are mainly due to disease related factors, the paucibacillary nature of disease and challenges with sample collection and processing. Reference standard test such as TB culture, geneXpert and histology which are used in the …

The Impact Of The Introduction Of The Pecarn Head Ct Rules On The Utilisation Of Head Ct Scans For Children With Mild Head Injury At The Aga Khan University Hospital, Nairobi., Isaac Oluoch Kobe

Theses & Dissertations

Background: Head injury is the most common cause of childhood morbidity and mortality worldwide. Mild head injury comprises 90% of cases of head injury in children. Head CT scans are few, expensive and have the side effect of ionizing radiation whose effect is potentiated in children and also associated risk of sedation that is often required when doing CT scans in young children. The decision to order CT scans of the head is thus made on the basis of clinical decision rules of which the PECARN CT head rule has been found to be most sensitive and useful.

Objectives: Primary: …

Vitamin D Levels In Black African Adults At The Aga Khan University Hospital Nairobi, Elizabeth Muringa Kagotho

Theses & Dissertations

Introduction: Vitamin D has been known for centuries for its benefits in bone health. Recent observational studies have however demonstrated its benefits in infectious diseases such as tuberculosis and non-communicable diseases such as diabetes mellitus, cardiovascular diseases and cancer. This has led to a dramatic increase in testing among adults. The cut-offs for vitamin D deficiency have been debated for decades and the current cut off is derived from a Caucasian population. Studies done among black African adults in Africa are few and have shown that vitamin D deficiency ranges from 5-91%. In view of the difference in skin colour, …

Effect Of Diabetes Self-Management Education On Glycemic Control, Compared To Usual Care In Type 2 Diabetic Patients At The Family Medicine Clinic, Aga Khan University Hospital Nairobi, Catherine Wanjiku Gathu

Theses & Dissertations

Background: Globally, the magnitude of disease burden associated with diabetes is high. Poor glycemic control contributes greatly to this burden, especially in the occurrence of related complications. The value of Diabetes Self-Management Education (DSME) is evident in literature, and has been recommended as a way of optimizing glycemic and metabolic control and averting early onset of diabetes complications. Usual care involves spontaneous sharing of information during medical consultations without planned structure or defined time frame. In the African setting, the effect of DSME, and how it compares to usual care, is yet to be fully explored.

Objective: To compare the …

Diagnostic Utility Of Who Defined Sepsis Syndromic Criteria With Procalcitonin In Identification Of Sepsis In Children With Suspected Infections, Samuel Owuor Akech

Theses & Dissertations

Title: Diagnostic Utility of WHO Defined Sepsis syndromic Criteria with Procalcitonin in Identification of Sepsis in Children with Suspected Infections

Background: Bacterial infections are a major cause of morbidity and mortality in children but accurate and timely diagnosis remains a challenge to the frontline clinicians. Cultures of sterile bodily specimens are considered the gold standard but are insensitive and results are delayed. Procalcitonin (PCT) has recently emerged as a biomarker with high sensitivity and specificity making it superior to culture based techniques performed in non-ideal circumstances which prevail in resource poor settings. This study investigated the diagnostic utility World Health …

Caregivers’ Knowledge, Perceptions And Home Management Practices Of Fever In Children Under The Age Of Five Years Presenting With Acute Febrile Illnesses, Katherine Oyieke

Theses & Dissertations

Background: Fever in children is one of the most common clinical symptoms and a frequent cause of caregiver concern. It is a normal body response to a variety of conditions, the most common of which is infection. Many childhood illnesses are accompanied by fever, which is often treated at home prior to presentation at a health facility. Nearly every child will develop a febrile episode at some point in life. The challenge for caregivers is to know when to be concerned and how to manage such episodes appropriately when they occur. Caregiver knowledge and perceptions regarding fever are an important …

Respiratory Function Amongst Asymptomatic Hiv Positive And Hiv Negative Clients At Aga Khan University Hospital, Nairobi, Noah Kipkemei Murbiy

Theses & Dissertations

Background: Spirometry is used to asses respiratory function abnormalities. This is usually in reference to a validated normal range unique to a particular gender, race, age, weight and height. Majority of persons are usually asymptomatic until the expected FEV1 has decreased by 50%. Early intervention on the abnormalities even in this asymptomatic group has been shown to retard the rate of pulmonary deterioration. An unpublished audit at the Aga Khan University Hospital, Nairobi, revealed that majority of newly diagnosed HIV positive persons were admitted at the Critical Care Units with a pulmonary cause which later resulted in poor outcomes. This …

Development Of A Guide By Postgraduate Residents On Receiving Feedback From Faculty In The Operating Theatre At Aga Khan University Hospital, David Karuri Maina

Theses & Dissertations

Background: Direct observation of residents in clinical encounters by faculty and assessment for learning has now become a key component of postgraduate training programs. DOPS, a workplace-based assessment form, was designed to provide formative assessment and feedback about a trainee’s procedural skills. Interactions between residents and faculty are central to this learning process and are influenced by multiple factors both at faculty and resident levels as well as contextual factors. The feedback may be used by the receiver to contemplate behaviour change. The receptivity of the resident to the feedback is a key determinant as to whether the process to …