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https://www.readbyqxmd.com/read/28209171/integrated-strategy-for-in-vitro-characterization-of-a-bileaflet-mechanical-aortic-valve
#1
Francesca Maria Susin, Stefania Espa, Riccardo Toninato, Stefania Fortini, Giorgio Querzoli
BACKGROUND: Haemodynamic performance of heart valve prosthesis can be defined as its ability to fully open and completely close during the cardiac cycle, neither overloading heart work nor damaging blood particles when passing through the valve. In this perspective, global and local flow parameters, valve dynamics and blood damage safety of the prosthesis, as well as their mutual interactions, have all to be accounted for when assessing the device functionality. Even though all these issues have been and continue to be widely investigated, they are not usually studied through an integrated approach yet, i...
February 16, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28208930/precautionary-measures-for-successful-open-heart-surgery-in-g6pd-deficient-patient-a-case-report
#2
Rupesh Kumar
Glucose-6-Phosphate Dehydrogenase (G6PD) deficiency is among the most common enzymatic disorders of red blood cells. Cardiac surgeries on this group of individuals are associated with an additional risk in terms of impaired oxygenation, prolonged ventilation and increased risk of haemolysis. These patients have a very low threshold for haemolysis due to oxidative stress. Many commonly used drugs also predispose the individual for haemolysis when they are subjected to surgery. Here we present a known case of G6PD deficient patient with symptoms of breathlessness for the last nine years who was taken for surgery with pre-planned precautionary measures to avoid unnecessary haemolysis...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208873/high-dose-intravenous-anti-d-immune-globulin-is-more-effective-and-safe-in-indian-paediatric-patients-of-immune-thrombocytopenic-purpura
#3
Trupti Rekha Swain, Rabindra Kumar Jena, Kali Prasanna Swain
INTRODUCTION: Immune Thrombocytopenia (ITP) is characterised by an autoimmune antibody-mediated destruction of platelets and impaired platelet production. Few controlled trials exist to guide management of patients with ITP in Indian scenario for which patients require an individualized approach. Anti-D (Rho (D) immune globulin) at a higher dose can prove to be a cost effective and safe alternative for Indian patients with ITP. AIM: To compare the safety and efficacy of higher dose (75μg/kg) intravenous Anti-D immune globulin against the standard dose of 50μg/kg for the management of ITP in Indian patients...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208125/mean-platelet-volume-in-heterozygous-beta-thalassaemia
#4
Mehmet Ali Cikrikcioglu, Kenan Celik, Iskender Ekinci, Muharrem Nasifov, Aybala Erek Toprak, Guven Cetin, Sema Genc
BACKGROUND/AIM: It is not known why cerebrovascular and cardiovascular ischaemic events are less frequently observed in heterozygous beta thalassaemia (HBT) patients than in the general population. However, we previously reported that serum levels of some platelet function markers, i.e. soluble CD40 ligand and soluble P-selectin, are lower in patients with HBT than in controls. A high mean platelet volume (MPV) is an indicator of in vivo platelet activation and may indicate a tendency to thrombosis...
February 17, 2017: Acta Haematologica
https://www.readbyqxmd.com/read/28198026/quantitative-assessment-of-haemolysis-secondary-to-modern-infusion-pumps
#5
T G Poder, J-C Boileau, R Lafrenière, L Thibault, N Carrier, M-J de Grandmont, P Beauregard
BACKGROUND: Although most studies have shown that little haemolysis is induced by infusion pumps, there are some notable exceptions. Only limited data are available on the actual infusion pumps that are most used in hospitals in Quebec and elsewhere, namely, the Infusomat(®) Space (peristaltic), Plum A+™ (piston) and Colleague(®) CXE (shuttle) pumps. METHODS: Haemolysis and potassium levels were compared before and after the use of the three different infusion pumps...
February 15, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28176480/de-novo-thrombotic-microangiopathy-following-simultaneous-pancreas-and-kidney-transplantation-managed-with-eculizumab
#6
REVIEW
Lani Shochet, John Kanellis, Ian Simpson, Joseph Ta, William Mulley
Thrombotic microangiopathy (TMA) is a well-recognised complication following transplantation, often due to an underlying genetic predisposition, medications or rejection. The use of eculizumab in these settings has been previously described, but its role still remains to be clarified. A 45-year-old man, with a history of type 1 diabetes mellitus and subsequent end-stage kidney failure, presented for a simultaneous pancreas-kidney transplant. Immunologically, he was well matched with the donor, and he received standard induction immunosuppression including tacrolimus...
February 2017: Nephrology
https://www.readbyqxmd.com/read/28176477/absence-of-thrombocytopaenia-and-or-microangiopathic-haemolytic-anaemia-does-not-reliably-exclude-recurrence-of-atypical-haemolytic-uraemic-syndrome-after-kidney-transplantation
#7
REVIEW
Anoushka R Krishnan, Brian Siva, Aron Chakera, Germaine Wong, Daniel Wong, Wai H Lim
A 54-year-old man was diagnosed with atypical haemolytic uraemic syndrome (aHUS) with confirmed complement H mutation in 2012, requiring ongoing dialysis. He was commenced on eculizumab in 2014 once the pharmaceutical board approved this drug. After 4 months, he received a live unrelated donor renal transplant from his wife and continued eculizumab post-transplant. Three months later, there was a rise in his creatinine with no laboratory features of haemolysis and a kidney biopsy confirmed rejection, which was treated with increased immunosuppression...
February 2017: Nephrology
https://www.readbyqxmd.com/read/28176474/monoclonal-gammopathy-of-renal-significance-triggering-atypical-haemolytic-uraemic-syndrome
#8
REVIEW
Usman Mahmood, Nicole Isbel, Peter Mollee, Andrew Mallett, Sridevi Govindarajulu, Ross Francis
Haemolytic uraemic syndrome is a rare condition with an overall incidence of one to two cases in a population of 100 000 and approximately 10% of these cases are classified as atypical. Atypical haemolytic uraemic syndrome (aHUS) is a thrombotic microangiopathy (TMA) characterized by microangiopathic haemolytic anaemia (MAHA), thrombocytopenia and acute kidney injury. aHUS can be genetic, acquired or idiopathic (negative genetic screening and no environmental triggers). We describe a case of aHUS triggered by monoclonal gammopathy of renal significance (MGRS) successfully treated with plasmapheresis and a bortezomib-based chemotherapy regimen, resulting in marked improvement in renal function and other markers of haemolysis...
February 2017: Nephrology
https://www.readbyqxmd.com/read/28176472/suspected-atypical-haemolytic-uraemic-syndrome-in-two-post-partum-patients-with-foetal-death-in-utero-responding-to-eculizumab
#9
REVIEW
Justin Chua, Kathy Paizis, Simon Z He, Peter Mount
BACKGROUND: Atypical haemolytic uraemic syndrome (aHUS) is a rare condition with the triad of microangiopathic haemolytic anaemia, thrombocytopenia and acute kidney injury. Other conditions that present in a similar manner peri-partum include thrombotic thrombocytopaenic purpura, and pregnancy associated conditions including HELLP syndrome (haemolysis, elevated liver enzymes and low platelets), severe pre-eclampsia and less commonly acute fatty liver of pregnancy. CASE REPORTS: We describe two cases of suspected aHUS, who presented post-partum with foetal death-in-utero at 33 and 37 weeks respectively...
February 2017: Nephrology
https://www.readbyqxmd.com/read/28176471/subclinical-atypical-haemolytic-uremic-syndrome-relapse-following-discontinuation-of-eculizumab
#10
REVIEW
Shi Zhou Choo, Fiona Brown
A 25-year-old man presented with microangiopathic haemolytic anaemia and acute kidney injury. With a normal ADAMTS-13 level, negative faecal shiga-toxin test and strong family history of atypical haemolytic uremic syndrome, he was commenced on eculizumab to good clinical response. Subsequent genetic testing revealed a heterozygous complement factor H mutation. Eculizumab was discontinued after 44 months of treatment, and he relapsed within 6 months, with the first sign being downtrending haptoglobin levels, with no other markers of haemolysis or thrombocytopaenia, 5 weeks prior to development of acute kidney injury...
February 2017: Nephrology
https://www.readbyqxmd.com/read/28170391/haemolysis-in-g6pd-heterozygous-females-treated-with-primaquine-for-plasmodium-vivax-malaria-a-nested-cohort-in-a-trial-of-radical-curative-regimens
#11
Cindy S Chu, Germana Bancone, Kerryn A Moore, Htun Htun Win, Niramon Thitipanawan, Christina Po, Nongnud Chowwiwat, Rattanaporn Raksapraidee, Pornpimon Wilairisak, Aung Pyae Phyo, Lily Keereecharoen, Stéphane Proux, Prakaykaew Charunwatthana, François Nosten, Nicholas J White
BACKGROUND: Radical cure of Plasmodium vivax malaria with 8-aminoquinolines (primaquine or tafenoquine) is complicated by haemolysis in individuals with glucose-6-phosphate dehydrogenase (G6PD) deficiency. G6PD heterozygous females, because of individual variation in the pattern of X-chromosome inactivation (Lyonisation) in erythroid cells, may have low G6PD activity in the majority of their erythrocytes, yet are usually reported as G6PD "normal" by current phenotypic screening tests...
February 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28167844/current-methods-of-haemolysis-detection-and-reporting-as-a-source-of-risk-to-patient-safety-a-narrative-review
#12
REVIEW
Euan J McCaughey, Elia Vecellio, Rebecca Lake, Ling Li, Leslie Burnett, Douglas Chesher, Stephen Braye, Mark Mackay, Stephanie Gay, Tony C Badrick, Johanna I Westbrook, Andrew Georgiou
AIM: Haemolysis has a major impact on patient safety as the need for a replacement specimen increases the risk of injury and infection, delays test results and extends the duration of hospital stays. Consistency of haemolysis detection and reporting can facilitate the generation of benchmark data used to develop quality practices to monitor and reduce this leading cause of pre-analytical laboratory error. This review aims to investigate current methods of haemolysis detection and reporting...
December 2016: Clinical Biochemist. Reviews
https://www.readbyqxmd.com/read/28165853/biocompatibility-and-characterization-of-polyglycerol-based-thermoresponsive-nanogels-designed-as-novel-drug-delivery-systems-and-their-intracellular-localization-in-keratinocytes
#13
Christian Gerecke, Alexander Edlich, Michael Giulbudagian, Fabian Schumacher, Nan Zhang, Andre Said, Guy Yealland, Silke B Lohan, Falko Neumann, Martina C Meinke, Nan Ma, Marcelo Calderón, Sarah Hedtrich, Monika Schäfer-Korting, Burkhard Kleuser
Novel nanogels that possess the capacity to change their physico-chemical properties in response to external stimuli are promising drug delivery candidates for the treatment of severe skin diseases. As thermoresponsive nanogels (tNGs) are capable of enhancing penetration through biological barriers such as the stratum corneum and are taken up by keratinocytes of human skin, potential adverse consequences of their exposure must be elucidated. In this study, tNGs were synthesized from dendritic polyglycerol (dPG) and two thermoresponsive polymers...
February 6, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28165051/insights-into-structure-and-activity-of-natural-compound-inhibitors-of-pneumolysin
#14
Hongen Li, Xiaoran Zhao, Xuming Deng, Jianfeng Wang, Meng Song, Xiaodi Niu, Liping Peng
Pneumolysin is the one of the major virulence factor of the bacterium Streptococcus pneumoniae. In previous report, it is shown that β-sitosterol, a natural compound without antimicrobial activity, is a potent antagonist of pneumolysin. Here, two new pneumolysin natural compound inhibitors, with differential activity, were discovered via haemolysis assay. To explore the key factor of the conformation for the inhibition activity, the interactions between five natural compound inhibitors with differential activity and pneumolysin were reported using molecular modelling, the potential of mean force profiles...
February 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28160319/higher-anti-a-b-isoagglutinin-titres-of-igg-class-but-not-of-igm-are-associated-with-increased-red-blood-cell-transfusion-requirements-in-bone-marrow-transplantation-with-major-abo-mismatch
#15
Gil Cunha De Santis, Aline Cristina Garcia-Silva, Giuliana Martinelli Dotoli, Pamela Tinti de Castro, Belinda Pinto Simões, Dimas Tadeu Covas
BACKGROUND: Major ABO-mismatch between donor and recipient in bone marrow transplantation (BMT) may cause haemolysis, delayed red blood cell (RBC) engraftment and pure red cell aplasia (PRCA), which result in increased transfusion needs. High pre-transplant anti-A/B antibody titres have been associated with increased risk of PRCA. Herein we studied the impact of anti-A/B titres on transfusion needs after BMT with major ABO-mismatch. METHODS: We reviewed the medical charts of 27 patients who underwent to BMT with major ABO-mismatch, and categorized them into two groups according to anti-A/B titres of IgG (≤ 16 and ≥ 32)...
February 3, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28159390/sickle-cell-disease
#16
REVIEW
Russell E Ware, Mariane de Montalembert, Léon Tshilolo, Miguel R Abboud
Sickle cell disease is a common and life-threatening haematological disorder that affects millions of people worldwide. Abnormal sickle-shaped erythrocytes disrupt blood flow in small vessels, and this vaso-occlusion leads to distal tissue ischaemia and inflammation, with symptoms defining the acute painful sickle-cell crisis. Repeated sickling and ongoing haemolytic anaemia, even when subclinical, lead to parenchymal injury and chronic organ damage, causing substantial morbidity and early mortality. Currently available treatments are limited to transfusions and hydroxycarbamide, although stem cell transplantation might be a potentially curative therapy...
January 31, 2017: Lancet
https://www.readbyqxmd.com/read/28157719/preclinical-safety-and-efficacy-evaluation-of-biocas-bioactive-calcium-sulfate-bone-cement
#17
Sony Sandhya, Parayanthala Valappil Mohanan, Arumugan Sabareeswaran, Hari Krishna Varma, Manoj Komath
A new bioactive calcium sulfate-based formulation (named 'BioCaS') has been developed for bone filler applications. This is a self-setting injectable cement where the preset form comprises bassanite obtained from the uniform submicron-sized precursor crystals of gypsum, modified with hydrogen orthophosphate ions. The results of the safety and efficacy evaluation of BioCaS cement, done as per the International Standards and guidelines, are presented in this paper. The study plan consisted of in vitro screening tests of cytotoxicity and haemolysis and in vivo biocompatibility evaluation, including an acute systemic toxicity test (in mice), an intracutaneous reactivity test (in rabbits), a pyrogen test (in rabbits) and a maximization sensitization test (in guinea pigs)...
February 3, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28155819/modelling-primaquine-induced-haemolysis-in-g6pd-deficiency
#18
James Watson, Walter Rj Taylor, Didier Menard, Sim Kheng, Nicholas J White
Primaquine is the only drug available to prevent relapse in vivax malaria. The main adverse effect of primaquine is erythrocyte age and dose dependent acute haemolytic anaemia in individuals with glucose-6-phosphate dehydrogenase deficiency (G6PDd). As testing for G6PDd is often unavailable this limits the use of primaquine for radical cure. A compartmental model of the dynamics of red blood cell production and destruction was designed to characterise primaquine-induced haemolysis using a holistic Bayesian analysis of all published data and was used to predict a safer alternative to the currently recommended once weekly 0...
February 3, 2017: ELife
https://www.readbyqxmd.com/read/28155674/numerical-prediction-of-thrombus-risk-in-an-anatomically-dilated-left-ventricle-the-effect-of-inflow-cannula-designs
#19
Sam Liao, Benjamin Simpson, Michael Neidlin, Tim A S Kaufmann, Zhiyong Li, Maria A Woodruff, Shaun D Gregory
BACKGROUND: Implantation of a rotary blood pump (RBP) can cause non-physiological flow fields in the left ventricle (LV) which may trigger thrombosis. Different inflow cannula geometry can affect LV flow fields. The aim of this study was to determine the effect of inflow cannula geometry on intraventricular flow under full LV support in a patient specific model. METHODS: Computed tomography angiography imaging of the LV was performed on a RBP candidate to develop a patient-specific model...
December 28, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28143519/severe-malaria-in-europe-an-8-year-multi-centre-observational-study
#20
Florian Kurth, Michel Develoux, Matthieu Mechain, Denis Malvy, Jan Clerinx, Spinello Antinori, Ida E Gjørup, Joaquím Gascon, Kristine Mørch, Emanuele Nicastri, Michael Ramharter, Alessandro Bartoloni, Leo Visser, Thierry Rolling, Philipp Zanger, Guido Calleri, Joaquín Salas-Coronas, Henrik Nielsen, Gudrun Just-Nübling, Andreas Neumayr, Anna Hachfeld, Matthias L Schmid, Pietro Antonini, Tilman Lingscheid, Peter Kern, Annette Kapaun, José Saraiva da Cunha, Peter Pongratz, Antoni Soriano-Arandes, Mirjam Schunk, Norbert Suttorp, Christoph Hatz, Thomas Zoller
BACKGROUND: Malaria remains one of the most serious infections for travellers to tropical countries. Due to the lack of harmonized guidelines a large variety of treatment regimens is used in Europe to treat severe malaria. METHODS: The European Network for Tropical Medicine and Travel Health (TropNet) conducted an 8-year, multicentre, observational study to analyse epidemiology, treatment practices and outcomes of severe malaria in its member sites across Europe...
January 31, 2017: Malaria Journal
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