Publications by authors named "Chong V"

Stomach cancer remains a significant cause of mortality, as most patients are diagnosed at advanced stages. The primary method for diagnosis is endoscopy, along with tissue acquisition, supplemented by endoscopic ultrasound or computed tomography for disease staging. While point-of-care ultrasound (POCUS) is now firmly integrated into clinical practice, it is still not widely utilized.

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This article provides a comprehensive overview of clinical trial design and regulatory pathways essential for drug development, specifically in the context of retinal diseases. Key concepts include trial structure, efficacy and safety endpoints, and regulatory expectations from agencies like the FDA. It delves into recent regulatory advancements, such as the inclusion of low-luminance vision as a secondary endpoint and analyses case studies from age-related macular degeneration (AMD) trials.

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A pyogenic liver abscess (PLA) is uncommon and a potentially life-threatening condition. Clinical manifestations and laboratory investigations can be non-specific and the detection of PLAs requires imaging, which can often be delayed. Point-of-care ultrasound (POCUS) is now becoming more widely adopted and plays an important role in clinical practice.

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Background: Human papilloma virus (HPV)-positive oropharyngeal squamous cell carcinoma (OPSCC) is rising in prevalence and is associated with better survival than HPV-negative OPSCC. In surgically treated HPV-negative OPSCCs, adverse pathologic features such as positive surgical margins, extra-nodal extension (ENE) and perineural invasion are well described to portend worse clinical outcomes. These adverse pathological features, however, are not validated prognostic markers among surgically treated HPV-positive OPSCCs.

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Background: Patients with heart failure and iron deficiency have diverse causes for hospitalization and death that might be affected by iron repletion.

Objectives: The purpose of this study was to explore causes of hospitalizations and deaths in a randomized trial (IRONMAN) of heart failure comparing intravenous ferric derisomaltose (FDI) (n = 568) and usual care (n = 569).

Methods: Patients with heart failure, left ventricular ejection fraction ≤45%, and either transferrin saturation <20% or serum ferritin <100 μg/L were enrolled.

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We wrote the letter in response to the insightful comments made by Dr. Vassallo J regarding our recently published study, “Association of Oral Montelukast with Reduced Odds of Developing Exudative Age-Related Macular Degeneration.” Our study underscored the potential treatment for AMD through managing mast cell activation.

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Clinical Relevance: Visual function impairment from diabetic retinopathy can have a considerable impact on patient's quality of life. Best-corrected visual acuity (BCVA) is most commonly used to assess visual function and guide clinical trials. However, BCVA is affected late in the disease process, is not affected in early disease, and does not capture some of the visual disturbances described by patients with diabetes.

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Background: Police activity in emergency medical settings has been shown to complicate the care of patients and impact patient-provider relationships. Recent scholarship has called for clear hospital policy outlining the terms of police access to patients and the role of clinicians. Despite regular contact between trauma surgeons and police, research on the impact of police activity on trauma care has been limited.

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Purpose: To describe the prevalence of subretinal transient hyporeflectivity (STHR) in exudative neovascular age-related macular degeneration (nAMD) and its response to a loading phase of aflibercept.

Methods: Optical coherence tomography (OCT) scans of treatment-naïve nAMD patients captured at baseline and after a loading phase of aflibercept were graded for presence of STHR, defined as a small, well-defined, round, subretinal, hyporeflective area, delimited between the ellipsoid zone (EZ) and the retinal pigmented epithelium/Bruch membrane complex. OCT parameters recorded were macular neovascularisation (MNV) subtypes, location of retinal fluids (subretinal fluid, SRF and intraretinal fluid, IRF), central retinal and choroidal thickness.

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There is shortage of organs, including kidneys, worldwide. Along with deceased kidney transplantation, there is a significant rise in live kidney donation. The prevalence of prediabetes (PD), including impaired fasting glucose and impaired glucose tolerance, is on the rise across the globe.

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Objective: Coronavirus disease (COVID-19) vaccinations have been shown to prevent infection with efficacies ranging from 50% to 95%. This study assesses the impact of vaccination on the clinical severity of COVID-19 during the second wave in Brunei Darussalam in 2021, which was due to the Delta variant.

Methods: Patients included in this study were randomly selected from those who were admitted with COVID-19 to the National Isolation Centre between 7 August and 6 October 2021.

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Background: Ineffective communication with Deaf individuals in healthcare settings has led to poor outcomes including miscommunication, waste, and errors. To help address these challenges, we developed a mobile app, Deaf in Touch Everywhere (DITE) which aims to connect the Deaf community in Malaysia with a pool of off-site interpreters through secure video conferencing.

Objectives: The aims of this study were to (a) assess the feasibility and acceptability of measuring unified theory of acceptance and use of technology (UTAUT) constructs for DITE with the Deaf community and Malaysian sign language (BIM) interpreters and (b) seek input from Deaf people and BIM interpreters on DITE to improve its design.

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Purpose: To review the evidence for imaging modalities in assessing the vascular component of diabetic retinal disease (DRD), to inform updates to the DRD staging system.

Design: Standardized narrative review of the literature by an international expert workgroup, as part of the DRD Staging System Update Effort, a project of the Mary Tyler Moore Vision Initiative. Overall, there were 6 workgroups: Vascular Retina, Neural Retina, Systemic Health, Basic and Cellular Mechanisms, Visual Function, and Quality of Life.

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Globally and in Malaysia, there are increasing rates of HIV infection among older adults but a corresponding decline in other younger age groups. We aimed to investigate the HIV-related knowledge, perceived risks, attitudes, and risk behaviours among multi-ethnic urban-dwelling older adults in Malaysia. A cross-sectional, questionnaire-based study was conducted among 320 adults aged 50 years and above residing in urban Klang Valley, Malaysia.

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Decades of studies on age-related macular degeneration (AMD), cardiovascular disease and stroke have not found consistent associations between AMD and systemic vascular disease. This study suggests that there is in fact no general relationship, but instead a strong, specific association between only the subretinal drusenoid deposit (SDD) phenotype of AMD on retinal imaging and certain co-existent vascular diseases that are high risk for compromised cardiac output or internal carotid artery stenosis. Future screening initiatives for these high -risk vascular diseases (HRVDs) with fast, inexpensive retinal imaging could make a significant contribution to public health and save lives.

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Article Synopsis
  • - The study aimed to compare baseline characteristics of patients with and without early residual fluid (ERF) following treatment for neovascular age-related macular degeneration (nAMD) using aflibercept.
  • - Out of 2128 patients, 50% experienced ERF after the loading phase, with specific characteristics like increased central subfield thickness (CST) and certain forms of fluid observed to correlate with the presence of ERF.
  • - The findings suggest that patients with CST greater than or equal to 418 microns and certain fluid types may need additional monthly treatments before changing their treatment schedule.
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Pneumorrhachis is a rare entity, where air pockets are found in the spinal canal and the etiology can be categorized into traumatic and non-traumatic, the latter further categorized into spontaneous, iatrogenic, and associated with infections. Infective causes are often associated with gas-forming organisms and are associated with significant morbidity and mortality. Often the diagnosis is not suspected until imaging is done.

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Purpose: To study associations of optical coherence tomography (OCT) features with presenting visual acuity (VA) in treatment naive neovascular age-related macular degeneration (nAMD).

Methods: Patients with nAMD initiated on aflibercept therapy were recruited from December 2019 to August 2021. Demographic and OCT (Spectralis, Heidelberg Engineering) features associated with good VA (VA ≥ 68 ETDRS letters, Snellen ≥ 6/12) and poor VA (VA < 54 letters, Snellen < 6/18) were analysed using Generalised Estimating Equations to account for inter-eye correlation.

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