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Laboratory and coagulation test

Gabriel Lima-Oliveira, Dorothy M Adcock, Gian Luca Salvagno, Emmanuel J Favaloro, Giuseppe Lippi
OBJECTIVE: Thus study was aimed to investigate whether the mixing technique could influence the results of routine and specialized clotting tests on post-thawed specimens. METHODS: The sample population consisted of 13 healthy volunteers. Venous blood was collected by evacuated system into three 3.5mL tubes containing 0.109mmol/L buffered sodium citrate. The three blood tubes of each subject were pooled immediately after collection inside a Falcon 15mL tube, then mixed by 6 gentle end-over-end inversions, and centrifuged at 1500g for 15min...
October 18, 2016: Clinical Biochemistry
J C Menon, J K Joseph, M P Jose, B L Dhananjaya, O V Oommen
INTRODUCTION: Snakebite is an occupational hazard causing considerable morbidity and mortality worldwide, particularly so in tropical countries like India. OBJECTIVE: The aim of this study is to (i) review the demographic, clinical and laboratory findings in patients (1051) admitted with venomous snakebite (ii) to correlate mortality, morbidity and duration of hospital stay with clinical signs, symptoms and laboratory parameters. METHODS: A retrospective study of 1051 patients treated for snakebite over 10 years (2000 - 2009) in Little Flower Hospital, Angamaly, Kerala...
August 2016: Journal of the Association of Physicians of India
Julie L Huffmyer, Lucas G Fernandez, Cyrus Haghighian, Abdullah S Terkawi, Danja S Groves
BACKGROUND: The Quantra Hemostasis Analyzer is a novel diagnostic device that uses an ultrasound-based technology, sonic estimation of elasticity via resonance (SEER) sonorheometry, to characterize the dynamic changes in viscoelastic properties of a blood sample during coagulation. Cardiac surgery utilizing cardiopulmonary bypass (CPB) is associated with a significant impact on the coagulation system and can result in perioperative coagulopathy. The aim of this study was to correlate SEER sonorheometry results to corresponding rotational thromboelastometry (ROTEM) and laboratory parameters obtained before, during, and after CPB...
October 4, 2016: Anesthesia and Analgesia
Iris van Moort, Marieke Joosten, Moniek P M de Maat, Frank W G Leebeek, Marjon H Cnossen
Measurements of factor VIII coagulation activity (FVIII:C) may vary and result in misclassification of hemophilia A with delay in initiation of prophylactic treatment. We describe two young brothers who were diagnosed as moderate hemophilia patients and therefore not prophylactically treated with factor VIII concentrate despite frequent bleeding events. These findings emphasize the importance of (i) multiple measurements of FVIII:C by certified laboratories, (ii) adjustment of treatment when test results do not correspond to clinical symptoms, (iii) relevance of additional DNA mutation analysis in patients with hemophilia A, and (iv) treatment in centers with expertise...
October 13, 2016: Pediatric Blood & Cancer
Fuat H Saner, Carmen Kirchner
BACKGROUND: Patients with end-stage liver disease (ESLD) are assumed to be at high risk of bleeding when undergoing any kind of invasive intervention (any kind of operation, including transplantation or minimally invasive interventions). Both bleeding and thrombosis are associated with a poor outcome. METHODS: A selective literature research was conducted with the following key words: 'cirrhosis', 'coagulation', 'bleeding', 'INR' (international normalized ratio), 'aPTT' (activated partial thromboplastin time), and 'thrombocytopenia'...
August 2016: Visc Med
Divya Ramchandani, Dusten Unruh, Clayton S Lewis, Vladimir Y Bogdanov, Georg F Weber
Molecules of the coagulation pathway predispose patients to cancer-associated thrombosis and also trigger intracellular signaling pathways that promote cancer progression. The primary transcript of tissue factor, the main physiologic trigger of blood clotting, can undergo alternative splicing yielding a secreted variant, termed asTF (alternatively spliced tissue factor). asTF is not required for normal hemostasis, but its expression levels positively correlate with advanced tumor stages in several cancers, including pancreatic adenocarcinoma...
October 10, 2016: Laboratory Investigation; a Journal of Technical Methods and Pathology
L Chow, A Carr, L MacKenzie, A Walker, D Archer, A Lee
BACKGROUND: Dalteparin is often used for prophylaxis or treatment of venous thromboembolism during pregnancy, yet there is no laboratory test to accurately reflect its clinical activity. Thromboelastography is a point-of-care monitor of whole blood coagulation. The aim of this study was to determine if serial doses of dalteparin added in vitro to whole blood samples from term, pregnant women are detectable as changes in thromboelastography parameters. METHODS: Thirty healthy parturients presenting for elective caesarean section were recruited...
September 1, 2016: International Journal of Obstetric Anesthesia
Rokea A El-Azhary, Michelle T Patzelt, Robert D McBane, Amy L Weaver, Robert C Albright, Alina D Bridges, Paul L Claus, Mark D P Davis, John J Dillon, Ziad M El-Zoghby, LaTonya J Hickson, Rajiv Kumar, Kathleen A M McCarthy-Fruin, Marian T McEvoy, Mark R Pittelkow, David A Wetter, Amy W Williams, James T McCarthy
OBJECTIVE: To identify coagulation risk factors in patients with calciphylaxis and the relationship between anticoagulation use and overall survival. PATIENTS AND METHODS: Study subjects were 101 patients with calciphylaxis seen at Mayo Clinic from 1999 to September 2014. Data including thrombophilia profiles were extracted from the medical records of each patient. Survival status was determined using patient registration data and the Social Security Death Index...
October 2016: Mayo Clinic Proceedings
Sang Ook Ha, Sang Hyuk Park, Sang Bum Hong, Seongsoo Jang
Disseminated intravascular coagulation (DIC) is a major complication in sepsis patients. We compared the performance of five DIC diagnostic criteria, focusing on the prediction of mortality. One hundred patients with severe sepsis or septic shock admitted to intensive care unit (ICU) were enrolled. Routine DIC laboratory tests were performed over the first 4 days after admission. The overall ICU and 28-day mortality in DIC patients diagnosed from five criteria (International Society on Thrombosis and Haemostasis [ISTH], the Japanese Association for Acute Medicine [JAAM], the revised JAAM [R-JAAM], the Japanese Ministry of Health and Welfare [JMHW] and the Korean Society on Thrombosis and Hemostasis [KSTH]) were compared...
November 2016: Journal of Korean Medical Science
Pietro Emanuele Napoli, Alberto Cuccu, Roberta Farci, Maurizio Fossarello
BACKGROUND: Cilioretinal artery (CRA) occlusions are rare in young patients. In these cases, the most commonly associated causes are considered to be the same as those implicated in central retina artery occlusions, such as vasculitic processes, migraine, cardiac disorder, and coagulation abnormality. The aim of this article was to report for the first time the medical records and investigational results of an unusual case of simultaneous occlusion of three CRAs after scleral buckling surgery under local anesthesia...
2016: International Medical Case Reports Journal
Tianyi Xia, Shouhong Gao, Chang Shu, Yan Wen, Yunlei Yun, Xia Tao, Wansheng Chen, Feng Zhang
OBJECTIVES: To investigate potential interferences of two pre-analytical variables, the storage time and the vacutainer tube, on the quantification of 20 amino acids using a UHPLC-MS/MS method. DESIGN AND METHODS: Blood samples from 25 apparently healthy subjects were collected into duplicate sets of EDTA-2K, EDTA-3K, coagulation, heparin and citrate tubes, and stored in capped vacutainer tubes at 4°C for 6h, 12h and 24h before sample analysis. A UHPLC-MS/MS method was established for simultaneous quantification of 20 amino acids...
September 30, 2016: Clinical Biochemistry
Lesley De Pietri, Marcello Bianchini, Gianluca Rompianesi, Elisabetta Bertellini, Bruno Begliomini
AIM: To describe the thromboelastography (TEG) "reference" values within a population of liver transplant (LT) candidates that underline the differences from healthy patients. METHODS: Between 2000 and 2013, 261 liver transplant patients with a model for end-stage liver disease (MELD) score between 15 and 40 were studied. In particular the adult patients (aged 18-70 years) underwent to a first LT with a MELD score between 15 and 40 were included, while all patients with acute liver failure, congenital bleeding disorders, and anticoagulant and/or antiplatelet drug use were excluded...
September 24, 2016: World Journal of Transplantation
Karen S Brown, Hamim Zahir, Michael A Grosso, Hans J Lanz, Michele F Mercuri, Jerrold H Levy
BACKGROUND: Four nonvitamin K antagonist oral anticoagulants (NOACs) are approved for the prevention of stroke in patients with nonvalvular atrial fibrillation and for the treatment of venous thromboembolism. These include the direct thrombin inhibitor dabigatran and the direct factor Xa inhibitors rivaroxaban, apixaban, and edoxaban. Bleeding is a complication for all anticoagulants and concerns regarding bleeding risk and the suitability of effective reversal strategies may be a barrier to their prescription...
September 23, 2016: Critical Care: the Official Journal of the Critical Care Forum
Asrar Ahmad, Monica Kohli, Anita Malik, Megha Kohli, Jaishri Bogra, Haider Abbas, Rajni Gupta, B B Kushwaha
PURPOSE: In this study, we aimed to correlate thromboelastography (TEG) variables versus conventional coagulation profile in all patients presenting with pre-eclampsia/eclampsia and to see whether TEG would be helpful for evaluating coagulation in parturients before regional anaesthesia. MATERIALS AND METHODS: This was a prospective study on 100 pre-eclampsia/eclampsia patients undergoing lower-segment caesarean section under regional anaesthesia. Two blood samples were collected...
October 2016: Journal of Obstetrics and Gynaecology of India
Bethany T Samuelson, Adam Cuker, Deborah M Siegal, Mark Crowther, David A Garcia
BACKGROUND: The direct oral anticoagulants (DOACs) are the treatment of choice for most patients with atrial fibrillation and/or non-cancer associated venous thromboembolic disease. While routine monitoring of these agents is not required, assessment of anticoagulant effect may be desirable in special situations. The objective of this study was to systematically review and summarize current evidence regarding laboratory assessment of the anticoagulant effects of dabigatran, rivaroxaban, apixaban and edoxaban...
September 13, 2016: Chest
Cassie A Barton
OBJECTIVES: To provide a concise review of the medical management of coagulopathy related to hepatic insufficiency. This review will focus on prevention and management of bleeding episodes in patients with hepatic insufficiency. The treatment and prevention of thromboembolic complications will also be addressed. DATA SOURCES: Electronic search of PubMed database using relevant search terms, including hepatic coagulopathy, hemorrhage, liver diseases, blood coagulation disorders, blood transfusion, disseminated intravascular coagulation, and liver failure...
October 2016: Critical Care Medicine
Brittney Williams, John McNeil, Andrew Crabbe, Kenichi A Tanaka
Achieving hemostasis after complex cardiovascular and transplant surgical procedures is one of the greatest challenges anesthesiologists face. Preoperative coagulation disturbances due to underlying disease or antithrombotic therapy are common, and they are worsened by intraoperative blood loss and fluid replacement. The coagulation reactions in vivo are incredibly complex interactions among blood cells, proteins, and vasculature, standing in sharp contrast to rather simple treatment options including transfusion of platelets, plasma, and cryoprecipitate...
August 27, 2016: Transfusion Medicine Reviews
Fatma Demet Arslan, Muhittin Serdar, Elif Merve Ari, Mustafa Onur Oztan, Sureyya Hikmet Kozcu, Huseyin Tarhan, Ozgur Cakmak, Merve Zeytinli, Hamit Yasar Ellidag
BACKGROUND: In order to apply the right treatment for hemostatic disorders in pediatric patients, laboratory data should be interpreted with age-appropriate reference ranges. OBJECTIVES: The purpose of this study was to determining age-dependent reference range values for prothrombin time (PT), activated partial thromboplastin time (aPTT), fibrinogen tests, and D-dimer tests. MATERIALS AND METHODS: A total of 320 volunteers were included in the study with the following ages: 1 month - 1 year (n = 52), 2 - 5 years (n = 50), 6 - 10 years (n = 48), 11 - 17 years (n = 38), and 18 - 65 years (n = 132)...
June 2016: Iranian Journal of Pediatrics
Xinliang Guan, Jiachen Li, Ming Gong, Feng Lan, Hongjia Zhang
Coagulopathy is still a frequent complication in the surgical treatment of acute aortic dissection. However, the physiopathology of surgically induced coagulopathy has never been systematically and comprehensively studied in patients with acute aortic dissection. The aim of the present study was to describe the perioperative hemostatic system in patients with acute aortic dissection.The 87 patients who underwent aortic arch surgery for acute Stanford type A aortic dissection from January 2013 to September 2015 were enrolled in this study...
September 2016: Medicine (Baltimore)
Jeffrey B Riley, Gregory J Schears, Gregory A Nuttall, William C Oliver, Mark H Ereth, Joseph A Dearani
Excessive bleeding and allogeneic transfusion during adult post-cardiotomy venoarterial extracorporeal membrane oxygenation (ECMO) are potentially harmful and expensive. Balancing the inhibition of clotting and distinguishing surgical from non-surgical bleeding in post-operative period is difficult. The sensitivity of coagulation tests including Thromboelastography(®) (TEG) to predict chest tube drainage in the early hours of ECMO was examined with the use of receiver-operating characteristics (ROC). The results are useful to incorporate in clinical evidence-based algorithms to guide management decisions...
June 2016: Journal of Extra-corporeal Technology
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