Publications by authors named "Richard F Singer"

Introduction: To assess the safety, efficacy, and calcium flux of an accelerated algorithm for regional citrate anticoagulation in membrane-based plasma exchange.

Methods: This was an observational study in patients receiving citrate anticoagulated, membrane-based plasma exchange at the Canberra Hospital between July 2017 and May 2020. Data were collected prospectively using an electronic medical record and compared to data from our previous published algorithm.

View Article and Find Full Text PDF

Drugs excreted by the kidney require dose reduction in chronic kidney disease. This adjustment depends on the severity of the disease and what proportion of the drug is eliminated by the kidneys The estimated glomerular filtration rate can generally be used to guide dose adjustment in patients with stable kidney function. However, the formula can be misleading in some patient subsets and other approaches are required At extremes of body mass, the estimated glomerular filtration rate can under- or overestimate kidney function.

View Article and Find Full Text PDF

is a rare cause of peritoneal dialysis-associated peritonitis (PD peritonitis). One documented case report described poor outcome despite treatment with appropriate antibiotics. Here, we report the successful treatment of PD peritonitis due to with 21 days of intraperitoneal (IP) antibiotics using the regimen described for , notably IP gentamicin (10 days) followed by IP cefepime and oral ciprofloxacin (11 days).

View Article and Find Full Text PDF

Calciphylaxis has high mortality. Vitamin K deficiency is common in haemodialysis patients and may be a trigger for calciphylaxis due to its role in activating matrix Gla protein (a tissue inhibitor of calcification). We report the case of a 43-year-old female haemodialysis patient who developed calciphylaxis.

View Article and Find Full Text PDF

Background: Non-randomised data have shown a link between hyperuricaemia and the progression or development of chronic kidney disease (CKD). If this is correct, urate lowering therapy might form an important part of chronic kidney disease care, reducing risks for cardiovascular outcomes and end-stage kidney disease.

Objectives: This review aims to study the benefits and harms of uric acid lowering therapy on the progression of CKD and other cardiovascular endpoints.

View Article and Find Full Text PDF

Background: Regional citrate hemodialysis anticoagulation is used when heparin is contraindicated, but most protocols require large infusions of calcium and frequent intradialytic plasma ionized calcium measurements.

Objectives: The objective of this study was to determine the safety, efficacy, and effect on calcium balance of regional citrate anticoagulation using sparse plasma ionized calcium sampling.

Design: The design of this study was observational.

View Article and Find Full Text PDF

Vitamin D status is determined by the serum concentration of one of its metabolites, 25-hydroxy-D. Defining vitamin D deficiency based on its classical roles in gut calcium absorption and bone mineralization is problematic in dialysis patients and, until recently, was ignored in the nephrology literature. The newly recognized nonclassical functions of vitamin D include effects on the immune system, cardiovascular disease, and cancer.

View Article and Find Full Text PDF

Four patients presenting with heavy proteinuria, vitamin D deficiency and secondary hyperparathyroidism were treated with cholecalciferol for 1.5-3 years. Doses of 7143-14286 U/day were necessary to achieve the calcidiol target of >75 nmol/L.

View Article and Find Full Text PDF

Background: Peritoneal dialysis (PD)-associated peritonitis is treated by administration of antibiotics mixed with the PD solution. Data on antibiotic stability for solutions in current use are limited. The aim of this study was to determine the stability of cefepime, cephazolin and ampicillin in three commercial PD solutions.

View Article and Find Full Text PDF

Background: Vitamin C (ascorbate) deficiency and symptoms consistent with deficiency (fatigue, myalgia, dyspnoea, gingivitis, cardiovascular instability and depression) are common in patients with renal failure. This study aimed to determine if supplementation with ascorbate in patients with severe renal failure improved symptoms or cardiovascular stability, or was associated with adverse effects.

Methods: The study was a 3-month, double-blind, randomized trial of ascorbic acid 250 mg or matching placebo given thrice weekly.

View Article and Find Full Text PDF