Publications by authors named "Mark Tan"

Introduction: In this study, we aimed to compare the performance of a convolutional neural network (CNN)-based deep learning model that was trained on a dataset of normal and abnormal paediatric elbow radiographs with that of paediatric emergency department (ED) physicians on a binomial classification task.

Methods: A total of 1,314 paediatric elbow lateral radiographs (patient mean age 8.2 years) were retrospectively retrieved and classified based on annotation as normal or abnormal (with pathology).

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Mine tailings generated from hydrometallurgical processing of nickel-cobalt laterite deposits contain high levels of chromium (Cr), with the hexavalent species being a toxic pollutant and carcinogen. However, the partitioning, speciation, and local bonding environment of Cr in the mine tailings remain largely unknown, hindering our ability to predict its toxicity and long-term behavior. Coupling detailed mineralogical, spectroscopic, and geochemical characterization with sequential extraction of tailings from active and rehabilitated dams, we show that Cr is present in its least toxic form, Cr(III), and largely immobilized by recalcitrant minerals.

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The dilemmas and uncertainties related to determining mental capacity and surrogate decision-making are universally recognised as one of the most important concepts in the field of clinical ethics. In Malaysia, healthcare practitioners often find both determining decision-making capacity of patients, and identifying surrogate decision makers for incapacitated patients confusing. This paper explores the concepts of decision-making capacity and surrogate decision-making, identifying key components and associated principles such as substituted judgement and best interests.

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Background: Palliative Care, Geriatrics and Emergency physicians are exposed to death, terminally ill patients and distress of patients and their families. As physicians bear witness to patients' suffering, they are vulnerable to the costs of caring-the emotional distress associated with providing compassionate and empathetic care to patients. If left unattended, this may culminate in burnout and compromise professional identity.

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Background: Point-of-Care Ultrasound (POCUS) consists of a range of increasingly important imaging modalities across a variety of specialties. Despite a variety of accreditation pathways available in the UK, lung POCUS training remains difficult to deliver and accreditation rates remain suboptimal. We describe a multidisciplinary, multi-centre, and multi-pronged approach to lung POCUS education within a region.

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Introduction: 3D-printed temporal bone models enable the training and rehearsal of complex otological procedures. To date, there has been no consolidation of the literature regarding the developmental process of 3D-printed temporal bone models. A brief review of the current literature shows that many of the key surgical landmarks of the temporal bone are poorly represented in models.

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We describe a case of infiltrative optic neuropathy with hypertrophic pachymeningitis noted on MRI of the brain, presenting a diagnostic dilemma with a wide variety of differential diagnoses to consider. Our patient is a middle-aged woman with a 20-year history of migranous-sounding headaches who was incidentally found to have worsening vision in her left eye during a routine driving test visual acuity check. Neurological examination revealed a left grade III relative afferent pupillary defect and a central scotoma with red desaturation.

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Respiratory metagenomics (RMg) needs evaluation in a pilot service setting to determine utility and inform implementation into routine clinical practice. Feasibility, performance, and clinical impacts on antimicrobial prescribing and infection control were recorded during a pilot RMg service. RMg was performed on 128 samples from 87 patients with suspected lower respiratory tract infection (LRTI) on two general and one specialist respiratory ICUs at Guy's and St Thomas' NHS Foundation Trust, London.

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Objectives: The COVID-19 pandemic has tested global healthcare resilience. Many countries previously considered 'resilient' have performed poorly. Available organisational and system frameworks tend to be context-dependent and focus heavily on physical capacities.

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Article Synopsis
  • The research focused on CDK4/6 inhibitors, specifically exploring how cellular senescence affects tumor growth in humans and its implications for cancer treatment.
  • A phase II clinical trial involving 30 patients with dedifferentiated liposarcoma tested the CDK4/6 inhibitor abemaciclib, demonstrating a median progression-free survival of 33 weeks and a good safety profile.
  • The study identified ANGPTL4 as a key factor in cell senescence, highlighting its role in immune response and suggesting that combining senolytics with abemaciclib could enhance treatment effectiveness in certain patients.
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Summary At A Glance: The 6-min walk test (6MWT) is a widely used field walking test. This study reports the normative reference values (NRV) of distance walked during 6MWT (6MWD) in healthy Singaporeans (aged 21-80) and updates the 6MWD reference equations. This information may facilitate the interpretation of the 6MWD in clinical populations.

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This article argues that environmental considerations fall within the scope of medical bioethics, and there are implications specific to medical education. It endorses the need to expand the scope and epistemology of contemporary medical bioethics discourse by including themes related to environmental considerations. Our discussion begins by providing a brief history of environmental bioethics.

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The demand for diagnostic imaging continues to rise. Against the backdrop of rising health care costs and finite resources, this has prompted a paradigm shift toward value-driven patient care. Inappropriate imaging is a barrier toward achieving this goal, which runs counter to prevailing evidence-based guidelines and contributes to rising healthcare costs.

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Recently, tumor budding (TB) has been suggested as a strong prognostic marker in urinary tract urothelial carcinoma (UC). The aim of this systematic review is to test the prognostic value of TB in UC by a meta-analysis of previously published studies. We systematically reviewed the literature related to TB by using the databases of Scopus, PubMed, and Web of Science.

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Objective: To determine the proportion of patients who return to work after inpatient stroke rehabilitation and to identify demographic, clinical, and functional predictive factors for its success.

Design: A retrospective follow-up study of patients with stroke who were premorbidly working and had completed inpatient rehabilitation in a large metropolitan hospital between January 2016 and December 2017. They underwent a telephone interview at 2 years post discharge.

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Objectives: Epidemiological and whole-genome sequencing analysis of an ongoing outbreak of Streptococcus pyogenes (Group A Streptococcus) in London (United Kingdom).

Methods: Prospective identification of Group A Streptococcus cases from a diagnostic laboratory serving central and south London between 27 November and 10 December 2022. Case notes were reviewed and isolates were retrieved.

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Resilience is ubiquitous in everyday speech, academic literature and governmental policies. Yet it seems to have taken a narrow scope in healthcare, confined to individual and psychological resilience. This short essay aims to broaden the understanding of resilience to organisational levels and calls intensivists to take active roles in fostering resilience for their staff.

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Synopsis of recent research by authors named "Mark Tan"

  • - Mark Tan's research primarily focuses on advancing medical education and clinical practices, particularly through innovative training methods like point-of-care ultrasound (POCUS) and the development of 3D-printed surgical simulators.
  • - His recent work includes investigating the utility of routine metagenomics for managing respiratory infections in ICU patients and assessing the impact of healthcare resilience in the wake of the COVID-19 pandemic.
  • - Tan's studies also explore complex medical cases such as infiltrative optic neuropathy related to meningioma and the efficacy of therapeutic approaches in cancer treatment, highlighting his diverse contributions to various medical fields.