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Haemostasis

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https://www.readbyqxmd.com/read/28212842/pathophysiological-consequences-of-receptor-mistraffic-tales-from-the-platelet-p2y12-receptor
#1
Margaret R Cunningham, Riyaad Aungraheeta, Stuart J Mundell
Genetic variations in G protein-coupled receptor (GPCR) genes can disrupt receptor function in a wide variety of human genetic diseases, including platelet bleeding disorders. Platelets are critical for haemostasis with inappropriate platelet activation leading to the development of arterial thrombosis, which can result in heart attack and stroke whilst decreased platelet activity is associated with an increased risk of bleeding. GPCRs expressed on the surface of platelets play key roles in regulating platelet activity and therefore function...
February 14, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28205396/can-the-diagnostic-reliability-of-the-thrombin-generation-test-as-a-global-haemostasis-assay-be-improved-the-impact-of-calcium-chloride-concentration
#2
L A Parunov, S S Surov, Y Liang, T K Lee, M V Ovanesov
BACKGROUND: Thrombin generation test (TGT) is a global haemostasis assay with a potential to predict bleeding tendencies and treatment effects in patients with haemophilia. Despite 15 years of clinical research, the diagnostic value of TGT remains controversial, possibly due to suboptimal sensitivity to coagulation deficiencies, robustness and reproducibility. OBJECTIVE: The goal of this study was to explore the effect of calcium chloride (CaCl2 ) concentration on the TGT's response to intrinsic coagulation factors (F) VIII, IX and XIa...
February 15, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28191610/italian-intersociety-consensus-on-doac-use-in-internal-medicine
#3
Domenico Prisco, Walter Ageno, Cecilia Becattini, Armando D'Angelo, Giovanni Davì, Raimondo De Cristofaro, Francesco Dentali, Giovanni Di Minno, Anna Falanga, Gualberto Gussoni, Luca Masotti, Gualtiero Palareti, Pasquale Pignatelli, Roberto M Santi, Francesca Santilli, Mauro Silingardi, Antonella Tufano, Francesco Violi
The direct oral anticoagulants (DOACs) are drugs used in clinical practice since 2009 for the prevention of stroke or systemic embolism in non-valvular atrial fibrillation, and for the treatment and secondary prevention of venous thromboembolism. The four DOACs, including the three factor Xa inhibitors (rivaroxaban, apixaban and edoxaban) and one direct thrombin inhibitor (dabigatran) provide oral anticoagulation therapy alternatives to Vitamin K antagonists (VKAs). Despite their clear advantages, the DOACs require on the part of the internist a thorough knowledge of their pharmacokinetic and pharmacodynamic characteristics to ensure their correct use, laboratory monitoring and the appropriate management of adverse events...
February 13, 2017: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28186870/total-hip-arthroplasty-via-the-direct-anterior-approach-with-kerboull-type-acetabular-reinforcement-device-for-an-elderly-female-with-factor-xi-deficiency
#4
Kei Sano, Yasuhiro Homma, Tomonori Baba, Jun Ando, Mikio Matsumoto, Hideo Kobayashi, Takahito Yuasa, Kazuo Kaneko
We present a case of successful and uncomplicated total hip arthroplasty with an acetabular reinforcement device in an elderly patient with hip osteoarthritis already diagnosed with factor XI deficiency, which is a very rare bleeding disorder and at high risk of post-operative haemorrhage, and it poses a substantial challenge to surgeons as a consequence of the specific risks of infection and fixation failure. Moreover, bone fragility in elderly patient increases potential risk of adverse event. Fresh frozen plasma was used to supplement factor XI activity...
2017: SICOT-J
https://www.readbyqxmd.com/read/28166812/efficacy-of-high-intensity-focused-ultrasound-assisted-hepatic-resection-hifu-ar-on-blood-loss-reduction-in-patients-with-liver-metastases-requiring-hepatectomy-study-protocol-for-a-randomized-controlled-trial
#5
Aurélien Dupré, David Pérol, Ellen Blanc, Patrice Peyrat, Valéria Basso, Yao Chen, Jérémy Vincenot, Anthony Kocot, David Melodelima, Michel Rivoire
BACKGROUND: Liver resection is the only potentially curative treatment for colorectal liver metastases (LM). It is considered a safe procedure, but is often associated with blood loss during liver transection. Blood transfusions are frequently needed, but they are associated with increased morbidity and risk of recurrence. Many surgical devices have been developed to decrease blood loss. However, none of them has proven superior to the standard crushing technique. We developed a new, powerful intra-operative high-intensity focused ultrasound (HIFU) transducer which destroys tissue by coagulative necrosis...
February 6, 2017: Trials
https://www.readbyqxmd.com/read/28166607/recombinant-fibrinogen-reveals-the-differential-roles-of-%C3%AE-and-%C3%AE-chain-cross-linking-and-molecular-heterogeneity-in-fibrin-clot-strain-stiffening
#6
I K Piechocka, N A Kurniawan, J Grimbergen, J Koopman, G H Koenderink
BACKGROUND: Fibrin plays a crucial role in haemostasis and wound healing by forming strain-stiffening fibrous networks that reinforce blood clots. The molecular origin of fibrin's strain-stiffening behavior remains poorly understood, primarily because plasma fibrinogen is a complex mixture of heterogeneous molecular variants and is often contaminated by plasma factors that affect clot properties. OBJECTIVES AND METHODS: To facilitate mechanistic dissection of fibrin nonlinear elasticity, we produced a homogeneous recombinant fibrinogen corresponding to the main variant in human plasma, termed rFib610...
February 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28160407/research-and-practice-in-thrombosis-and-haemostasis-the-new-isth-journal
#7
EDITORIAL
M Cushman
No abstract text is available yet for this article.
February 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28155614/cartilage-oligomeric-matrix-protein-matricellular-and-matricrine-signaling-in-cardiovascular-homeostasis-and-disease
#8
Yi Fu, Wei Kong
Cardiovascular (CV) diseases remain a leading cause of morbidity and mortality in the world. Increasing the understanding of the pathogenesis of various CV diseases may provide novel therapeutic targets to improve their prevention and treatment. Cartilage oligomeric matrix protein (COMP), also known as thrombospondin-5 (TSP-5), is a matricellular protein that is abundantly expressed in both cartilage and the CV system. Our group and others have identified COMP as playing critical roles in maintaining CV homeostasis...
February 1, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28148540/acute-lower-gi-bleeding-in-the-uk-patient-characteristics-interventions-and-outcomes-in-the-first-nationwide-audit
#9
Kathryn Oakland, Richard Guy, Raman Uberoi, Rachel Hogg, Neil Mortensen, Michael F Murphy, Vipul Jairath
OBJECTIVE: Lower GI bleeding (LGIB) is a common reason for emergency hospital admission, although there is paucity of data on presentations, interventions and outcomes. In this nationwide UK audit, we describe patient characteristics, interventions including endoscopy, radiology and surgery as well as clinical outcomes. DESIGN: Multicentre audit of adults presenting with LGIB to UK hospitals over 2 months in 2015. Consecutive cases were prospectively enrolled by clinical teams and followed for 28 days...
February 1, 2017: Gut
https://www.readbyqxmd.com/read/28145076/low-agreement-between-fresh-and-frozen-thawed-platelet-rich-plasma-in-the-calibrated-automated-thrombogram-assay
#10
M Ljungkvist, S Lövdahl, E Zetterberg, E Berntorp
INTRODUCTION: Thrombin generation tests (TGTs) are considered to give more detailed information of the overall coagulation capability of a patient than clotting-based routine assays. The TGT thrombin generation assay-calibrated automated thrombogram (TGA-CAT) uses both platelet-poor plasma (PPP) and platelet-rich plasma (PRP). Assessing PRP gives more physiological test conditions and is of great interest considering the important role platelets play in haemostasis. However, PRP needs to be assessed close after blood draw/preparation as freezing fragments the platelets...
January 31, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28139815/progress-in-haemostasis-from-individual-patients-to-pathophysiological-insights
#11
Johanna A Kremer Hovinga, Rüdiger E Scharf
No abstract text is available yet for this article.
January 31, 2017: Hämostaseologie
https://www.readbyqxmd.com/read/28139814/von-willebrand-factor-processing
#12
Maria A Brehm
Von Willebrand factor (VWF) is a multimeric glycoprotein essential for primary haemostasis that is produced only in endothelial cells and megakaryocytes. Key to VWF's function in recruitment of platelets to the site of vascular injury is its multimeric structure. The individual steps of VWF multimer biosynthesis rely on distinct posttranslational modifications at specific pH conditions, which are realized by spatial separation of the involved processes to different cell organelles. Production of multimers starts with translocation and modification of the VWF prepropolypeptide in the endoplasmic reticulum to produce dimers primed for glycosylation...
January 31, 2017: Hämostaseologie
https://www.readbyqxmd.com/read/28130927/fibrin-sealants-in-soft-tissue-surgery-of-the-head-and-neck-a-systematic-review-and-meta-analysis-of-randomised-controlled-trials
#13
M S Bajwa, C Tudur-Smith, R J Shaw, A G Schache
BACKGROUND: Fibrin sealants (FS) are commercially available products used in surgical wounds as adjuncts to haemostasis and closure of dead space. The role of FS in soft-tissue head and neck surgery has not been established. OBJECTIVES: To assess if FS improves wound related outcomes in patients undergoing soft-tissue surgery of the head and neck anatomical region that would commonly require a drain. TYPE OF REVIEW: Systematic review and meta-analysis of randomised controlled trials (RCTs)...
January 28, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28130285/migrating-coil
#14
Kai Rou Tey, Avin Aggarwal, Bhaskar Banerjee
We describe a rare case of a 60-year-old man with known history of peptic ulcer disease who presented with melena and epigastric pain secondary to coil migration into duodenal mucosa 4 years after the initial therapeutic embolisation of the gastroduodenal artery. Upper endoscopy revealed oozing duodenal ulcer at the same site of the previously located duodenal ulcer 4 years ago and metal coil impacted at the duodenal mucosa. It is unclear if the coil migration is the effect or the cause of the bleeding duodenal ulcer...
January 27, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28124406/recombinant-porcine-factor-viii-for-high-risk-surgery-in-paediatric-congenital-haemophilia-a-with-high-titre-inhibitor
#15
S E Croteau, Y L Abajas, A S Wolberg, B I Nielsen, G R Marx, C W Baird, E J Neufeld, P E Monahan
INTRODUCTION: High-titre factor VIII (FVIII) inhibitors complicate peri-operative haemostasis. Recombinant porcine FVIII (r-pFVIII) may provide an alternative haemostatic agent for high-risk procedures and allow FVIII activity monitoring. AIM: Devise an effective haemostatic plan for repair of a progressively symptomatic aortic coarctation in a 5-year-old male with immune tolerance induction (ITI) refractory high-titre FVIII inhibitors. METHODS: Preprocedure human FVIII inhibitor titre was 58 Bethesda Units mL(-1) (BU) and cross-reacted to neutralize porcine FVIII at 30 BU...
January 25, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28118963/acquired-haemophilia-epidemiology-clinical-presentation-diagnosis-and-treatment
#16
REVIEW
Maria Eva Mingot-Castellano, Ramiro Núñez, Francisco Javier Rodríguez-Martorell
The development of circulating autoantibodies able to inhibit some coagulation proteins induces severe or even life-threatening bleeding. This disorder is called acquired haemophilia. This is a rare disease, although its impact may be underestimated because of the lack of records, the lack of knowledge by many specialists, the complexity of the laboratory diagnosis and, finally, because of the fulminant clinical presentation that often precludes diagnosis. Several studies established that mortality ranges between 9 and 33%...
January 21, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28116744/refractory-haematuria-resulting-from-peritoneal-dissemination-of-metastatic-gastric-cancer-radiation-therapy-for-a-nodule-infiltrating-the-urinary-bladder
#17
Naoya Ishibashi, Toshiya Maebayashi, Takuya Aizawa, Masakuni Sakaguchi, Osamu Abe, Tsuyoshi Matsui, Megumu Watanabe
Bladder metastases from remote primary sites are rarely reported. We present a case of haematuria caused by infiltrationof the urinary bladder wall by a nodule resulting from peritoneal dissemination of a primary gastric tumour.The nodule was detected by computed tomography, magnetic resonance imaging and cystoscopy. Transarterialembolization or haemostasis could not be performed because of the haematuria, thus the vesical bleeding was treatedwith a low irradiation dose of 3 Gy/fraction for a total of 30 Gy administered to the dome of the urinary bladder...
January 18, 2017: Urology Journal
https://www.readbyqxmd.com/read/28110355/venous-gas-emboli-are-involved-in-post-dive-macro-but-not-microvascular-dysfunction
#18
Kate Lambrechts, Costantino Balestra, Michaël Theron, Anne Henckes, Hubert Galinat, Fanny Mignant, Marc Belhomme, Jean-Michel Pontier, François Guerrero
PURPOSE: Previous studies have shown vascular dysfunction of main conductance arteries and microvessels after diving. We aim to evaluate the impact of bubble formation on vascular function and haemostasis. To achieve this, we used a vibration preconditioning to influence bubble levels without changing any other parameters linked to the dive. METHODS: Twentty-six divers were randomly assigned to one of three groups: (1) the "vibrations-dive" group (VD; n = 9) was exposed to a whole-body vibration session 30 min prior the dive; (2) the "diving" group (D; n = 9) served as a control for the effect of the diving protocol; (3) The "vibration" protocol (V; n = 8) allowed us to assess the effect of vibrations without diving...
January 21, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28103532/timing-of-anticoagulant-re-initiation-following-intracerebral-hemorrhage-in-mechanical-heart-valves-survey-of-neurosurgeons-and-thrombosis-experts
#19
Fahad AlKherayf, Yan Xu, Harrison Westwick, Ioana Doina Moldovan, Philip S Wells
BACKGROUND: While oral anticoagulation (OAC) is universally indicated for patients with mechanical heart valves (MHVs), OAC resumption following anticoagulant-associated intracerebral hemorrhage (ICH) is an area of uncertainty. We sought to determine the practice preferences of North American neurosurgeons and thrombosis experts on optimal timing of OAC re-initiation. METHODS: A cross-sectional survey was disseminated to North American members of the American Association of Neurological Surgeons and the International Society for Thrombosis and Haemostasis...
January 16, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28101125/preventive-transarterial-embolization-in-upper-nonvariceal-gastrointestinal-bleeding
#20
Aleksejs Kaminskis, Aina Kratovska, Sanita Ponomarjova, Anna Tolstova, Maksims Mukans, Solvita Stabiņa, Raivis Gailums, Andrejs Bernšteins, Patricija Ivanova, Viesturs Boka, Guntars Pupelis
BACKGROUND: Transarterial embolization (TAE) is a therapeutic option for patients with a high risk of recurrent bleeding after endoscopic haemostasis. The aim of our prospective study was a preliminary assessment of the safety, efficacy, and clinical outcomes following preventive TAE in patients with non-variceal acute upper gastrointestinal bleeding (NVUGIB) with a high risk of recurrent bleeding after endoscopic haemostasis. METHODS: Preventive visceral angiography and TAE were performed after endoscopic haemostasis on patients with NVUGIB who were at a high risk of recurrent bleeding (PE+ group)...
2017: World Journal of Emergency Surgery: WJES
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