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https://www.readbyqxmd.com/read/29625945/structural-and-functional-annotation-of-citrate-synthase-from-aspergillus-niger-anj-120
#1
Ghulam Mustafa, Rawaba Arif, Shazia Anwer Bukhari, Muhammad Ali, Sumaira Sharif, Asia Atta
Citrate synthase (CS) is involved in citric acid biosynthesis which is a well-established metabolic pathway. The condensation of acetyl-CoA with oxaloacetate is catalyzed by CS. Citric acid (CA) has a number of applications in pharmaceutical industry. CA in combination with bicarbonates is used as an effervescent in the preparations of tablets and powders. It has also been used as an anticoagulant and acidulant to form mild astringent. In current study, detailed structural and functional analyses of CS protein were carried out using various bioinformatics tools...
March 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29624078/the-effect-of-3-2-and-3-8-sodium-citrate-on-specialized-coagulation-tests
#2
Franz Ratzinger, Mona Lang, Sabine Belik, Klaus G Schmetterer, Helmuth Haslacher, Thomas Perkmann, Peter Quehenberger
CONTEXT: - Coagulation testing is challenging and depends on preanalytic factors, including the citrate buffer concentration used. OBJECTIVE: - To better estimate preanalytic effects of the citrate buffer concentration in use, the difference between results obtained by samples with 3.2% and 3.8% citrate was evaluated. DESIGN: - In a prospective observational study with 76 volunteers, differences related to the citrate concentration were evaluated...
April 6, 2018: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/29614970/a-novel-citrate-based-protocol-versus-heparin-anticoagulation-for-sustained-low-efficiency-dialysis-in-the-icu-safety-efficacy-and-cost
#3
Ming Wen, Claudius Küchle, Dominik Steubl, Robin Satanovskji, Uwe Heemann, Yana Suttmann, Susanne Angermann, Stephan Kemmner, Lisa Rehbehn, Monika Huber, Christine Hauser, Christoph Schmaderer, Anna-Lena Reichelt, Bernhard Haller, Lutz Renders
BACKGROUND: The high cost, complexity of the available protocols, and metabolic complications are the major barriers that impede the clinical utilization of regional citrate anticoagulation (RCA) for sustained low efficiency dialysis (SLED) in critically ill patients. By comparing a novel protocol for SLED using 30% citrate solution with common protocol using unfractionated heparin, this study aimed to provide new insights for clinical applications of RCA. METHODS: In this retrospective study, a total of 282 critically ill patients who underwent SLED with citrate and/or heparin anticoagulation in six adult ICUs were enrolled...
April 3, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29606080/optimization-of-a-diagnostic-platform-for-oxidation-reduction-potential-orp-measurement-in-human-plasma
#4
David Polson, Nuria Villalba, Kalev Freeman
OBJECTIVES: Oxidation-reduction potential (ORP) measurement can demonstrate the extent of oxidative stress in patients with severe illness and/or injury. A novel ORP diagnostic platform using disposable sensors (RedoxSYS) has been validated by comparison to mass spectrometry, but the optimal methods of sample handling for best performance of the device have not been described. METHODS: We sought to optimize ORP measurement in human plasma under controlled conditions...
December 2018: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/29597225/continuous-renal-replacement-therapy-quality-control-and-performance-measures
#5
Bo Shen, Jiarui Xu, Yimei Wang, Wuhua Jiang, Jie Teng, Xiaoqiang Ding
Continuous renal replacement therapy (CRRT) is one of the most predominant forms of renal replacement therapy (RRT) currently in use now, this therapy being the initial RRT modality in most critically ill patients. However, in general, the quality of CRRT is still suboptimal. The quality of CRRT is affected by many factors, including the optimal prescription and precision delivery, the CRRT providers' professional level, and the CRRT device used. Establishment of a comprehensive quality control system covering all the aspects and procedures of CRRT is essential...
2018: Contributions to Nephrology
https://www.readbyqxmd.com/read/29597222/clinical-complications-of-continuous-renal-replacement-therapy
#6
Florent Sigwalt, Axelle Bouteleux, François Dambricourt, Théo Asselborn, Florent Moriceau, Thomas Rimmelé
The various complications of continuous renal replacement therapy (CRRT) are mostly preventable. Hemodynamic disturbances are dominated by hypotension due to the modification of volume status, myocardial dysfunction, cardiac arrhythmia, or modification of systemic vascular resistances, which are correlated with body temperature changes. Metabolic complications remain at the forefront and have profoundly changed with the use of regional citrate anticoagulation (RCA). RCA may lead to two distinct situations: citrate overload and citrate accumulation, respectively, responsible for metabolic alkalosis and metabolic acidosis...
2018: Contributions to Nephrology
https://www.readbyqxmd.com/read/29597215/evolution-of-vascular-access-and-anticoagulation
#7
Patrick M Honore, Herbert D Spapen
Continuous renal replacement therapy (CRRT) is an important and widely used adjuvant treatment in critically ill patients. However, any CRRT protocol can be adhered to only when the technique is correctly installed and functioning properly. Within this context, an appropriate vascular access and a safe and effective circuit anticoagulation method are key requisites. The right internal jugular (RIJ) vein is the preferred route for insertion with the tip of the catheter placed in the right atrium. Both femoral veins offer a valuable alternative access, but catheters must be longer to avoid recirculation and circuit blood flow is lower as compared with that of the RIJ approach...
2018: Contributions to Nephrology
https://www.readbyqxmd.com/read/29577795/regional-citrate-calcium-anticoagulation-during-polymyxin-b-hemoperfusion-a-case-series
#8
Francesco Forfori, Etrusca Brogi, Anna Sidoti, Martina Giraudini, Gianpaola Monti, Nadia Zarrillo, Vincenzo Cantaluppi, Claudio Ronco
INTRODUCTION: So far, only heparin-based anticoagulation has been proposed during polymyxin-B hemoperfusion. However, postsurgical septic patients can be at high risk of bleeding due to either surgical complications or septic coagulation derangement. Consequently, heparin should not represent in some cases the anticoagulation regimen of choice in this type of patients. METHODS AND RESULTS: We present a case series of four postsurgical septic patients treated with polymyxin-B hemoperfusion using regional citrate anticoagulation...
March 1, 2018: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/29575131/anticoagulation-bleeding-and-clotting-at-donor-plasmapheresis
#9
REVIEW
Josef Evers, Uwe Taborski
This article is based on a question of a colleague from North America how coagulation could be triggered between a donor's arm and a fistula needle during plasma donation (synonymous with donor plasmapheresis). The technique of venipuncture and citrate anticoagulation are described. Uncommon and rare problems such as prolonged bleeding, scarring, and thrombosis in plasma donors are discussed. If venous puncture and citrate: blood flow ratio at 1:16 are correctly performed, however, there will be no anticoagulation abnormalities due to plasma donation...
March 25, 2018: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/29479892/anticoagulant-choices-affect-the-mean-platelet-volume-measurement-by-impedance
#10
Juliana Spezia, Priscila B Hermann, Samuel R Comar, Geraldo Picheth, Railson Henneberg, Shirley R R Utiyama
BACKGROUND: Mean platelet volume (MPV) is a parameter that evaluates the platelet size. Clinical applications of MPV are limited because of its poor standardization in routine laboratories. This study analyzed the effect of anticoagulants on MPV measurements by impedance technology. METHODS: Blood from 36 healthy volunteers was collected in vacuum tubes filled with K2EDTA and sodium citrate, analyzed immediately (basal) and at 1, 2, and 3 hours after venipuncture...
January 1, 2018: Clinical Laboratory
https://www.readbyqxmd.com/read/29475179/comprehensive-characteristics-of-the-anticoagulant-activity-of-dabigatran-in-relation-to-its-plasma-concentration
#11
Willemijn J Comuth, Linda Ø Henriksen, Daan van de Kerkhof, Steen E Husted, Steen D Kristensen, Moniek P M de Maat, Anna-Marie B Münster
BACKGROUND: Issues with laboratory measurement of dabigatran include: 1. Do coagulation assays reflect dabigatran plasma concentrations? 2. Do samples from patients treated with dabigatran have the same coagulability as dabigatran-spiked samples from healthy volunteers? 3. What is the long-term stability of dabigatran after storage at -80 °C? This study aims to evaluate these questions. MATERIALS AND METHODS: Ecarin chromogenic assay (ECA), a laboratory-developed diluted thrombin time (LD-dTT), prothrombin time (PT) and activated partial thromboplastin time (APTT) and ROTEM® were used to measure dabigatran anticoagulant activity and liquid chromatography-tandem mass spectrometry (LC-MS/MS) to measure dabigatran plasma concentrations...
February 17, 2018: Thrombosis Research
https://www.readbyqxmd.com/read/29456612/the-safety-of-regional-citrate-anticoagulation-in-renal-replacement-therapy
#12
Simon Hill, Elaine Creighton, Edward Walter
No abstract text is available yet for this article.
February 2018: Journal of the Intensive Care Society
https://www.readbyqxmd.com/read/29434525/detecting-clinically-relevant-rivaroxaban-or-dabigatran-levels-by-routine-coagulation-tests-or-thromboelastography-in-a-cohort-of-patients-with-atrial-fibrillation
#13
Yvonne M C Henskens, Anouk J W Gulpen, René van Oerle, Rick Wetzels, Paul Verhezen, Henri Spronk, Simon Schalla, Harry J Crijns, Hugo Ten Cate, Arina Ten Cate-Hoek
Background: Traditional coagulation tests are included in emergency guidelines for management of patients on direct oral anticoagulants (DOACs) who experience acute bleeding or require surgery. We determined the ability of traditional coagulation tests and fast whole blood thromboelastography (ROTEM®) to screen for anticoagulation activity of dabigatran and rivaroxaban as low as 30 ng/mL. Methods: One hundred eighty-four citrated blood samples (75 dabigatran, 109 rivaroxaban) were collected from patients with non-valvular atrial fibrillation (NVAF), to perform screening tests from different manufacturers, (diluted, D) PT, aPTT, TT and ROTEM®...
2018: Thrombosis Journal
https://www.readbyqxmd.com/read/29430275/engineering-a-simple-lateral-flow-device-for-animal-blood-coagulation-monitoring
#14
Hua Li, Daewoo Han, Giovanni M Pauletti, Andrew J Steckl
Increasing numbers of animals are diagnosed with thromboembolism, requiring anticoagulation treatment to prevent thrombotic events. Frequent and periodic coagulation monitoring is critical to ensure treatment effectiveness and patient safety by limiting blood coagulation ability within the desired therapeutic range. Point-of-care diagnostics is an ideal candidate for frequent coagulation monitoring due to rapid test results and no need for laboratory setting. This article reports the first utilization of no-reaction lateral flow assay (nrLFA) device for simple and low-cost animal blood coagulation monitoring in resource-limited setting...
January 2018: Biomicrofluidics
https://www.readbyqxmd.com/read/29426053/-renal-replacement-therapy-in-acute-kidney-injury-indication-and-implementation
#15
Mira Küllmar, Alexander Zarbock
Acute kidney injury (AKI) is a common complication in critically ill patients and is associated with a worse short- and long-term outcome. The KDIGO (Kidney Disease: Improving Global Outcomes) guidelines suggest to implement preventive strategies in high-risk patients. Definition and classification of acute kidney injury according to the KDIGO criteria are based on an increase in serum creatinine and/or a decrease in urinary output. Renal replacement therapy (RRT) is the only supportive measure in patients with severe AKI...
February 2018: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/29417731/super-high-flux-continuous-venovenous-hemodialysis-using-regional-citrate-anticoagulation-long-term-stability-of-middle-molecule-clearance
#16
Martin Siebeck, Thomas Dimski, Timo Brandenburger, Torsten Slowinski, Detlef Kindgen-Milles
Continuous renal replacement therapy is a standard treatment in critically ill patients with acute kidney injury. All CRRT techniques provide a high low-molecular weight clearance but even with hemofiltration, clearance of middle molecules is low. We investigated whether a new super high-flux hemofilter provides effective and sustained middle molecule clearance during citrate-anticoagulated continuous venovenous hemodialysis for up to 72 h. We included 14 critically ill patients with AKI-KDIGO-III in a prospective observational trial...
February 8, 2018: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/29417256/plasma-clot-formation-and-clot-lysis-to-compare-effects-of-different-anticoagulation-treatments-on-hemostasis-in-patients-with-atrial-fibrillation
#17
Oliver Königsbrügge, Günter Weigel, Peter Quehenberger, Ingrid Pabinger, Cihan Ay
The effect of direct oral anticoagulants (DOACs) on turbidimetric measurements of plasma clot formation and susceptibility to fibrinolysis may facilitate a comparison between different classes of anticoagulants in plasma samples. We obtained 424 citrate plasma samples from 226 atrial fibrillation patients on anticoagulation and 24 samples without anticoagulation serving as controls. As comparators, we measured the international normalized ratio (INR) for phenprocoumon samples (N = 166), anti-Xa for low molecular weight heparin (LMWH) samples (N = 42), and DOAC levels with mass spectrometry (dabigatran N = 40, rivaroxaban N = 110, apixaban N = 42)...
February 7, 2018: Clinical and Experimental Medicine
https://www.readbyqxmd.com/read/29402829/a-continuous-renal-replacement-therapy-protocol-on-the-updated-nikkiso-aquarius-platform-using-regional-citrate-as-first-line-anticoagulation-significantly-improves-filter-life-span-but-the-position-of-the-vascular-access-is-key
#18
https://www.readbyqxmd.com/read/29351783/simple-citrate-anticoagulation-protocol-for-low-flux-haemodialysis
#19
Eng Kuang Lim, Ying-Ying T Seow, Shun E Chen, Gao Yang, Min Er Liaw, Shimi Isaac
BACKGROUND: For patients unable to receive heparin anticoagulation during haemodialysis, saline flushes to reduce circuit clotting are often the norm. Regional citrate anticoagulation (RCA) although effective is not used by many centres including in Singapore. We wanted to demonstrate the superiority and safety of a simple regional citrate anticoagulation regime, compared to saline flushes, for heparin-free low flux haemodialysis. METHODS: This is a prospective, open label, cross over study on 25 sequential haemodialysis sessions for inpatients receiving heparin-free haemodialysis...
January 19, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29346619/spurious-thrombocytopenia-in-automated-platelet-count
#20
Lixia Zhang, Jian Xu, Li Gao, Shiyang Pan
Spurious thrombocytopenia is a well-known phenomenon observed with the widespread use of hematology analyzers (HAs). In this study, 355 specimens with pseudo-thrombocytopenia (PTCP) were evaluated via epidemiology, identification, remedies, and platelet (PLT) count. Data showed that anticoagulants such as citrate and/or heparin-dependent PTCP (16.0%) became increasingly common, whereas ethylenediaminetetraacetic acid (EDTA)-induced PTCP (49.1%) remained the most frequent. We note that that nearly half of the patients with PTCP had veritable decreased PLT counts, even after PLT levels had been corrected...
March 21, 2018: Laboratory Medicine
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