Publications by authors named "Yogeesan Sivakumaran"

Median arcuate ligament syndrome (MALS) is an uncommon condition characterized by the compression of the celiac trunk by the median arcuate ligament. Due to the anatomical proximity to the foregut, MALS has significant implications in hepato-pancreato-biliary (HPB) surgery. It can pose complications in pancreatoduodenectomy and orthotopic liver transplantation, where the collateral arterial supply from the superior mesenteric artery is often disrupted.

View Article and Find Full Text PDF

The evolution of the hybrid operative environment has expanded the utility of inferior vena cava balloon occlusion (IVCBO) in contemporary surgical practice. First described in the management of acute decompensated heart failure and venous thromboembolism, IVCBO has been utilized in deployment of thoracic endoprosthesis, repair of aortocaval fistula, management of inferior vena cava (IVC) tumour thrombus, and abdominal IVC trauma. More recently, IVCBO has also been utilized as a therapeutic strategy to assist patients with reduced ejection fraction and exercise tolerance in the form of an implantable device.

View Article and Find Full Text PDF

Spontaneous isolated mesenteric arterial dissection (SIMAD) is an uncommon subset of non-traumatic dissection of the mesenteric arteries without concurrent aortic dissection. Due to the widespread use of computer tomography angiography, SIMAD cases have been increasingly reported in the past 20 years. Common risk factors associated with SIMAD include male gender, age 50-60 years, hypertension and smoking.

View Article and Find Full Text PDF

Objective: To provide family physicians with an evidence-based overview on the various methods of vascular access for hemodialysis (HD) and to provide a framework for the clinical assessment of HD access.

Sources Of Information: A MEDLINE literature search was conducted using the MeSH terms , , , and (or ), including all relevant English-language articles published between January 1995 and September 2021.

Main Message: The main types of permanent vascular access for HD are arteriovenous fistulas, arteriovenous grafts, and central venous catheters.

View Article and Find Full Text PDF
Article Synopsis
  • Frailty is a significant predictor of poor outcomes and higher mortality rates in patients undergoing vascular surgery, particularly during the resource-limited COVID-19 pandemic.
  • In a study involving 917 patients, 22.1% were identified as frail, with no significant difference in mortality rates between frail and non-frail patients over 30 days and 6 months; however, frail patients experienced longer hospital stays and more complications.
  • The study emphasizes the need for targeted care interventions for frail individuals to prevent adverse outcomes, particularly during healthcare challenges like pandemics.
View Article and Find Full Text PDF

The management of type A aortic dissection presents a major therapeutic challenge in modern surgical practice. Whilst the traditional dictum, to provide timely surgical intervention with the minimum treatment needed to repair the ascending aorta as well as the primary tear, may be a reasonable strategy in older patients, a tailored approach is desired for younger patients to manage the immediate life-threatening condition, as well as for the management of lifelong complications of the residual dissected aorta. Endovascular technology continues to advance, providing an adjunctive role to open cardiac repair presently to manage downstream aortic pathology, with the aim of striving towards a complete endovascular solution for type A aortic dissections.

View Article and Find Full Text PDF

Background: The benefits of best medical therapy (BMT) for secondary prevention of cardiovascular events in patients with peripheral arterial disease are well established. Guidelines recommend prescription of BMT should consist of anti-platelet, statins and angiotensin-converting enzyme inhibitor or angiotensin receptor blocking therapy, with evidence this regimen reduces cardiovascular mortality following vascular surgery and improves vascular bypass graft patency. This multicentre study examines the BMT prescription on discharge after infrainguinal bypass (IIB) in Australia and New Zealand (ANZ).

View Article and Find Full Text PDF

Venous aneurysms are a rare vascular anomaly characterized by a solitary area of dilatation containing all three layers of the venous vessel wall. Described throughout the venous system, venous aneurysms can be classified as deep or superficial based on the vein involved. Although generally asymptomatic, superficial venous aneurysms can be associated with venous insufficiency or venous thromboembolism and are often confused for soft tissue masses or hernias.

View Article and Find Full Text PDF

Essential thrombocythaemia (ET) is one of the severe rare clonal haematologic stem cell disorders that encompass myeloproliferative neoplasms. ET has a well-described association with peripheral arterial thrombosis, which presents a challenging clinical presentation. Further understanding into the underlying pathophysiology of thrombosis in ET has been made following the identification of the Janus Kinase 2 (JAK2) mutation, which is thought to confer a prothrombotic phenotype.

View Article and Find Full Text PDF

Background: Fecal incontinence is a chronic and debilitating condition with significant health burden. Despite its clinical relevance, the prevalence of fecal incontinence remains inconsistently described.

Objective: This study aimed to systematically review the literature regarding the prevalence of and factors associated with fecal incontinence among community-dwelling adults.

View Article and Find Full Text PDF

Background: Sacral neuromodulation (SNM) has emerged as a treatment option for faecal incontinence (FI). However, its objective effect on symptoms and anorectal function is inconsistently described. This study aimed to systematically review the impact of SNM on clinical symptoms and gastrointestinal physiology in patients with FI, including factors that may predict treatment outcome.

View Article and Find Full Text PDF

The sense of hearing is remarkable for its auditory dynamic range, which spans more than 10(12) in acoustic intensity. The mechanisms that enable the cochlea to transduce high sound levels without damage are of key interest, particularly with regard to the broad impact of industrial, military, and recreational auditory overstimulation on hearing disability. We show that ATP-gated ion channels assembled from P2X2 receptor subunits in the cochlea are necessary for the development of temporary threshold shift (TTS), evident in auditory brainstem response recordings as sound levels rise.

View Article and Find Full Text PDF