Publications by authors named "Malcolm Mahadevan"

Background: On January 30, COVID-19 was declared a Public Health Emergency of International Concern-a week after Singapore's first imported case and 5 days before local transmission. The National University Hospital (NUH) is Singapore's third largest hospital with 1200 beds, heavy clinical workloads, and major roles in research and teaching.

Main Body: With memories of SARS still vivid, there was an urgent requirement for the NUH Division of Infectious Diseases to adapt-undergoing major reorganization to face rapidly changing priorities while ensuring usual essential services and standards.

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This article was migrated. The article was marked as recommended. Healthcare professionals are playing an important role in the recent COVID-19 outbreak.

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Introduction: This study aimed to assess the effectiveness of the emergency department observation unit (EDOU) for patients with acute pyelonephritis in a Singapore tertiary academic medical centre.

Methods: We reviewed the clinical records of consecutive patients who presented with pyelonephritis between 1 July 2012 and 31 October 2014 to collect information on demographics, symptoms, signs, laboratory and radiological results, treatment, and clinical outcomes.

Results: Of 459 emergency department (ED) patients who were identified as having pyelonephritis, 164 (35.

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Background And Objectives: This study aims to identify reasons for unscheduled return visits (URVs), and risk factors for diagnostic errors leading to URVs, with comparisons to data from a similar study conducted in the same institution 9 years ago.

Materials And Methods: This retrospective study included adult patients who attended the emergency department (ED) of a tertiary hospital in Singapore between January 2014 and June 2014, with re-attendance within 72 h for the same or similar complaint. The primary outcome was wrong or delayed diagnoses.

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Objective: Neuropeptide Y, a widely circulating neurotransmitter, plays a pivotal role in energy balance, immunomodulation and asthma, and several NPY polymorphisms are promising genetic risk factors for asthma and obesity. We explored the associations of candidate NPY gene polymorphisms with prevalent asthma and its relationship with obesity in young adult asthma patients free of other chronic medical morbidity.

Methods: Five common gene variants of NPY (rs16147 (-399T/C), rs17149106 (-602G/T), rs16140 (+1000C/G), rs5573 (+1201A/G), rs5574 (+5327C/T)) previously validated to account for most of the NPY expression in vitro and in vivo were investigated in 126 physician-diagnosed asthma patients without other chronic medical morbidity and 182 healthy controls (21-35years).

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Study Objective: The noninvasive cardiac output monitor and passive leg-raising maneuver has been shown to be reasonably accurate in predicting fluid responsiveness in critically ill patients. We examine whether using a noninvasive protocol would result in more rapid lactate clearance after 3 hours in patients with severe sepsis and septic shock in the emergency department.

Methods: In this open-label randomized controlled trial, 122 adult patients with sepsis and serum lactate concentration of greater than or equal to 3.

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Background: Obesity is associated with asthma risk and severity, but the underlying biological mechanisms are poorly understood. We hypothesized that cytokine markers of systemic inflammation, and adiponectin and neuropeptide Y (NPY) markers of immuno-modulating and neurohormonal regulation are involved in the obesity-asthma association.

Methods: We explored the relationships between body mass index (BMI), C-reactive protein (CRP), IL-6, TNF-α, adiponectin and NPY with asthma prevalence and IL-4 levels in 70 youth with asthma and 69 age- and gender-matched healthy controls using cross-sectional and longitudinal data.

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Purpose: Psychiatric comorbidity is reported to be common among adolescents with asthma, but little is known about its underlying psychological factors.

Objective: This study explored the profile of anxiety and depressive comorbidities among adolescents with well-controlled and poorly controlled asthma and the contribution of neuroticism and perceived stress.

Methods: The Revised Child Anxiety and Depression Scale, Neuroticism subscale of Big Five Inventory, Perceived Stress Scale, and Asthma Control Test were administered to 198 adolescents (aged 12-19 years) with well-controlled (n = 137) and poorly controlled asthma (n = 61) as well as 171 healthy neighborhood controls.

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The effect of employing severity scores to identify severe community-acquired pneumonia (SCAP) cases for early aggressive resuscitation is unknown. Optimising pre-intensive care unit (ICU) care may improve outcomes in patients at risk of SCAP. We conducted a before-and-after study of patients classified into control and intervention groups (January 2004 to December 2007 and January 2008 to December 2010, respectively).

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Objectives: The Surviving Sepsis Campaign has been shown to improve the outcome of patients with severe sepsis or septic shock in Europe and North America. We aim to examine the impact of implementing the severe sepsis resuscitation bundle as part of standard care at the National University Hospital Emergency Department (ED) and assess its feasibility in Singapore.

Materials And Methods: Adult patients presenting to the ED with severe sepsis and septic shock from 1 July 2008 to 31 December 2009 were included.

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Objective: To examine the impact of implementing sepsis bundle in multiple Asian countries, having 'team' vs. 'non-team' models of patient care.

Design: Prospective cohort study.

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Background: Delayed access to specialist care for emergency patients is associated with increased risk of morbidity and mortality, and increased patient anxiety.

Objectives: (1) To provide timelier access to inpatient and urgent outpatient specialist care for emergency patients. (2) To influence multiple stakeholders to modify their traditional practices and sustain changes.

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Introduction: Implementation of the Surviving Sepsis Campaign (SSC) guidelines has been associated with improved outcome in patients with severe sepsis. Resolution of lactate elevations or lactate clearance has also been shown to be associated with outcome. The purpose of the present study was to examine the compliance and effectiveness of the SSC resuscitation bundle with the addition of lactate clearance.

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Background: Medical simulation has been used to teach critical illness in a variety of settings. This study examined the effect of didactic lectures compared with simulated case scenario in a medical simulation course on the early management of severe sepsis.

Methods: A prospective multicentre randomised study was performed enrolling resident physicians in emergency medicine from four hospitals in Asia.

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Objective: The objective of this study was to compare an expedited 24-hour management pathway against traditional inpatient ward management of patients with primary spontaneous pneumothorax (PSP) and recurrent spontaneous pneumothorax (RSP).

Method: This was a retrospective chart review of all patients who presented with either PSP or RSP to an urban tertiary university hospital in 2007.

Results: Eighty-two patients were included in the study, of which approximately a third (27) were managed in the emergency department observation unit (EDOU).

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Conventional emergency department (EMD) approach to triaging acute chest pain syndromes may lead to unnecessary admissions, resulting to in-hospital bed occupancy and increased healthcare costs. We explore the diagnostic utility of early (less than a week) outpatient scheduled single photon emission computed tomography (SPECT) in intermediate-risk chest pain subjects who presented to EMD with non-diagnostic electrocardiogram and negative serum troponin level. Additionally, we intend to study the safety and cost-effectiveness of such a strategy.

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Introduction: Many patients present to the Emergency Department (ED) complaining of headache and a significant proportion of these visits would result in hospital admissions. This study analyses the demographics, presentation, work-up, reasons for admission, diagnoses and outcomes of patients admitted with the chief complaint of headache--to identify possible ways of reducing such admissions.

Materials And Methods: A retrospective analysis was done of the electronic medical records/discharge summaries of all adult patients admitted during a 1-year period from January to December 2006 with the diagnosis of primary headaches or secondary headaches not related to trauma, intracranial infection, inflammation, mass lesion, raised intracranial pressure or a serious systemic illness from the ED of the National University Hospital of Singapore.

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Service provision for a population with endemic dengue is difficult because of its variable incidence and its unpredictable clinical course in individuals. We describe a novel hospital-based outpatient dengue management clinic that is sustainable both during and outside epidemic periods. Pre-defined selection criteria based on demographic, clinical and laboratory prognostic factors were applied.

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