Publications by authors named "Alun Davies"

Adherence to guideline-recommended therapies for peripheral artery disease (PAD), including pharmacotherapy (antiplatelet, lipid-lowering, and antihypertensive agents) and lifestyle modifications (smoking cessation, diet, weight management, and physical activity) remains low. Though single-component interventions targeting smoking cessation, exercise, or medication adherence show some efficacy, comprehensive multicomponent interventions are vital for addressing the complexity of PAD management. This review systematically synthesized multicomponent interventions for patients with PAD.

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Objectives: Adherence to peripheral arterial disease (PAD) treatment remains low, despite its benefit for secondary disease prevention. Currently, there is no qualitative research exploring why this is the case. This study aimed to explore patients' lived experiences of PAD and its treatment, their motivation to adherence and barriers to non-adherence.

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Peripheral arterial disease (PAD) affects over 236 million people globally, with endovascular treatment as the predominant mode of revascularization. While pre-procedural lesion assessment typically relies on non-invasive Doppler measurement, invasive physiological assessment offers a promising approach to guide lesion selection and provide real-time evaluation of angioplasty success. This review explores the current methods, challenges, and future directions of invasive physiological assessment in PAD.

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Background: Venous leg ulcers (VLUs) cause significant impairment to patients' quality of life (QoL) and up to 30% do not heal at 6 months. Decellularized dermis (DCD) allografts have been shown to be effective in improving healing rates of diabetic foot ulcers in RCTs. The DAVE RCT aimed to determine whether DCD is an effective, safe, and cost-effective treatment adjunct for VLUs.

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Natural Language Processing (NLP) has the potential to revolutionise clinical research utilising Electronic Health Records (EHR) through the automated analysis of unstructured free text. Despite this potential, relatively few applications have entered real-world clinical practice. This paper aims to introduce the whole pipeline of NLP methodologies for EHR analysis to the clinical researcher, with case studies to demonstrate the application of these methods in the existing literature.

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Guidance for venous leg ulceration (VLU) recommends compression therapy and early referral for specialist vascular assessment within two weeks. Few patients receive timely assessment and referral. Reasons for this are unclear.

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Introduction: Venous leg ulcers (VLU) are the most severe manifestation of venous insufficiency and carry a poor prognosis because of delayed healing and recurrent ulceration. Pentoxifylline (PTX) is an example of a vasoactive medication that can be used alongside compression therapy to help improve ulcer healing rates. A previous review highlighted improved healing of VLU with PTX, although no analysis was made for complete ulcer healing and recurrence following treatment.

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Article Synopsis
  • Simulation is the preferred method for teaching trauma management, with current exploration into virtual and augmented reality as alternative techniques.
  • A systematic search yielded 3815 studies, with 13 ultimately included, showing that while VR is positively received by users, objective assessment is needed.
  • VR is beneficial for training in trauma scenarios, but it won't replace traditional simulation soon; further research with larger groups is required for effective integration into medical education.
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Objectives: Evaluation of the literature assessing the use of thermography, a non-invasive imaging modality that detects pathological temperature variation, in recognising superficial venous insufficiency (SVI).

Methods: A systematic review was conducted according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Articles were screened by two individuals and data was subsequently extracted.

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Introduction: Sarcopenia is defined by low measures of muscle quantity, quality and reduced physical performance. It is associated with higher levels of frailty. Individuals with diabetes mellitus (DM) undergo sarcopenia at an accelerated rate resulting in structural changes potentially culminating in limb loss.

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Article Synopsis
  • This study aimed to evaluate a new classification system for chronic venous obstruction (CVO) patients who have undergone successful medical procedures across 13 vascular centers from 2015 to 2019.
  • Researchers analyzed the data of 1,033 CVO patients, classifying them into five categories based on the severity and location of their condition, and assessed stent deployment and complications alongside follow-up outcomes.
  • Results showed that primary patency rates varied significantly among the classifications, with lower rates indicating more severe CVO, and identified key predictors of patency loss such as CVO type and the total number of stents used, suggesting the need for further validation of this classification system in future research.
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Objective: Chronic venous disease (CVD) is a condition presenting a great burden to patients and society, with poorly characterised pathophysiology. Metabolic phenotyping can elucidate mechanisms of disease and identify candidate biomarkers. The aim of this study was to determine differences in the metabolic signature between symptomatic patients with CVD and asymptomatic volunteers using proton nuclear magnetic resonance spectroscopy (H-NMR).

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Background And Aims: To determine the effect of evolocumab treatment in patients with asymptomatic carotid artery stenosis ≥50% on carotid plaque morphology and composition, as determined by magnetic resonance imaging.

Methods: We conducted a double-blind randomized controlled trial in patients with asymptomatic carotid artery plaque with ≥50% stenosis and low-density lipoprotein-associated cholesterol (LDL-C) ≥1.8 mmol/L, despite standard lipid-lowering therapy, with 12 months of evolocumab or placebo injection every two weeks.

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Surgical inpatients are at increased risk of venous thromboembolism (VTE). Current national guidelines recommend a combination of pharmacological (chemoprophylaxis) and mechanical thromboprophylaxis to reduce VTE risk. For most patients, mechanical thromboprophylaxis is provided via application of graduated compression stockings (GCS).

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Background: Inadvertent intra-arterial injection of sclerosants is an uncommon adverse event of both ultrasound-guided and direct vision sclerotherapy. This complication can result in significant tissue or limb loss and significant long-term morbidity.

Objectives: To provide recommendations for diagnosis and immediate management of an unintentional intra-arterial injection of sclerosing agents.

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Objective: Patients with chronic venous disease (CVD) can present with different underlying hemodynamic abnormalities affecting the deep, superficial, and perforator veins. This review explores the relationship between reflux patterns, extent of venous reflux, and clinical manifestations of CVD.

Methods: The Medline and EMBASE databases were searched systematically from 1946 to April 1, 2024.

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Background And Aims: Traditional apprenticeship-based surgical training presents with challenges, especially in acute scenarios. Simulation provides the current standard of facilitating surgical training in a low-risk environment but is restricted by limited accessibility and high costs. Virtual reality (VR) offers immersive three-dimensional computer-generated training scenarios and can connect users from various locations.

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Article Synopsis
  • The study aimed to assess the current methods used by medical professionals to diagnose Post-Thrombotic Syndrome (PTS) and explore the need for a new diagnostic tool.! -
  • An online survey of 502 specialists revealed that while most relied on imaging to confirm deep vein thrombosis (DVT), many did not use scoring systems for PTS diagnosis or management.! -
  • The findings indicated a lack of consistency in diagnosing PTS and a desire among 65% of participants to create a new diagnostic approach for better accuracy in future evaluations.!
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Background: There are limited data on the immunogenicity of coronavirus disease 2019 (COVID-19) vaccines in African populations. Here we report the immunogenicity and safety of the ChAdOx1 nCoV-19 (AZD1222) vaccine from a phase 1/2 single-blind, randomised, controlled trial among adults in Kenya conducted as part of the early studies assessing vaccine performance in different geographical settings to inform Emergency Use Authorisation.

Methods: We recruited and randomly assigned (1:1) 400 healthy adults aged ≥18 years in Kenya to receive ChAdOx1 nCoV-19 or control rabies vaccine, each as a two-dose schedule with a 3-month interval.

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Background: Pelvic venous disorders (PeVD) encompass a variety of conditions linked to chronic pelvic pain in women. However, PeVD remain underdiagnosed due to the absence of universally accepted diagnostic criteria. The complexity of PeVD classifications across specialties leads to delays in treatment.

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Background: In recent years, decision support tools (DSTs) in various fields of medicine have emerged to aid clinicians and patients in the process of shared decision-making (SDM). This scoping review aims to identify the existing DSTs for selecting treatments in lower extremity arterial disease and to evaluate their effectiveness in facilitating SDM.

Methods: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines for scoping reviews were followed.

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