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Antifibrinolytics

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https://www.readbyqxmd.com/read/28090801/angiotensin-converting-enzyme-inhibitors-attenuate-propofol-induced-pro-oxidative-and-antifibrinolytic-effect-in-human-endothelial-cells
#1
Marzena Wojewodzka-Zelezniakowicz, Anna Gromotowicz-Poplawska, Wioleta Kisiel, Emilia Konarzewska, Janusz Szemraj, Jerzy Robert Ladny, Ewa Chabielska
INTRODUCTION: The aim of this study was to investigate the effects of plasma and tissue angiotensin-converting enzyme inhibitors (ACE-Is) against propofol-induced endothelial dysfunction and to elucidate the involved mechanisms in vitro. MATERIALS AND METHODS: We examined the effects of propofol (50 μM), quinaprilat and enalaprilat (10(-5) M) on fibrinolysis (t-PA, PAI-1, TAFI antigen levels), oxidative stress parameters (H2O2 and MDA antigen levels and SOD and NADPH oxidase mRNA levels) and nitric oxide bioavailability (NO2/NO3 concentration and NOS expression at the level of mRNA) in human umbilical vein endothelial cells (HUVECs)...
January 2017: Journal of the Renin-angiotensin-aldosterone System: JRAAS
https://www.readbyqxmd.com/read/28079258/combined-effect-of-therapeutic-strategies-for-bleeding-injury-on-early-survival-transfusion-needs-and-correction-of-coagulopathy
#2
K Balvers, S van Dieren, K Baksaas-Aasen, C Gaarder, K Brohi, S Eaglestone, S Stanworth, P I Johansson, S R Ostrowski, J Stensballe, M Maegele, J C Goslings, N P Juffermans
BACKGROUND: The combined effects of balanced transfusion ratios and use of procoagulant and antifibrinolytic therapies on trauma-induced exsanguination are not known. The aim of this study was to investigate the combined effect of transfusion ratios, tranexamic acid and products containing fibrinogen on the outcome of injured patients with bleeding. METHODS: A prospective multicentre observational study was performed in six level 1 trauma centres. Injured patients who received at least 4 units of red blood cells (RBCs) were analysed and divided into groups receiving a low (less than 1 : 1) or high (1 or more : 1) ratio of plasma or platelets to RBCs, and in receipt or not of tranexamic acid or fibrinogen products (fibrinogen concentrates or cryoprecipitate)...
January 12, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28062803/posterior-circulation-perforator-aneurysms-a-proposed-management-algorithm
#3
Thomas J Buell, Dale Ding, Daniel M S Raper, Ching-Jen Chen, Harry R Hixson, R Webster Crowley, Avery J Evans, Mary E Jensen, Kenneth C Liu
INTRODUCTION: Subarachnoid hemorrhage (SAH) from posterior circulation perforator aneurysms (PCPAs) is rare and its natural history is unknown. Diagnosis may be difficult, acute management is poorly defined, and long-term recurrent SAH rates and clinical outcome data are lacking. METHODS: We searched our institution's records for cases of PCPA rupture and analyzed patient demographics, Hunt and Hess (HH) grades, diagnostic imaging, management, and clinical outcomes...
January 6, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28039189/factor-xi-deficiency-is-associated-with-decreased-risk-for-cardiovascular-and-venous-thromboembolism-events
#4
Meir Preis, Julianna Hirsch, Antonio Kotler, Ahmad Zoabi, Nili Stein, Gad Rennert, Walid Saliba
Factor XI deficiency is one of the rare inherited coagulation factor deficiencies. However, it incidence is high among Ashkenazi Jewish. Because factor XI displays both procoagulant and antifibrinolytic activities, it has been postulated that an underlying cardiovascular benefit may exist with factor XI deficiency. This historical cohort study was performed using the electronic database of Clalit Health Services, the largest health care provider in Israel. All adults tested for Factor XI activity between 2002 and 2014 were included in the study...
December 30, 2016: Blood
https://www.readbyqxmd.com/read/28033139/air-medical-administration-of-tranexamic-acid
#5
Brian Cornelius
Traumatic injury is a significant cause of morbidity and mortality in the United States. Massive hemorrhage is responsible for the vast majority of deaths. Evolution in trauma treatment has resulted in major improvements to emergency care. Tranexamic acid (TXA), an antifibrinolytic agent, is synthetically derived from amino acids. The CRASH-2 study demonstrated that the early administration of TXA results in significant decreases in morbidity and mortality. Experiences by coalition forces in Southwest Asia found a substantial increase in survival of trauma patients with early TXA administration...
January 2017: Journal of Trauma Nursing: the Official Journal of the Society of Trauma Nurses
https://www.readbyqxmd.com/read/28028990/acquired-von-willebrand-syndrome
#6
REVIEW
Andrzej Mital
Acquired von Willebrand syndrome is a rare hemorrhagic diathesis, with clinical symptoms similar to those associated with the inherited form von Willebrand disease. This syndrome is characterized by a lack of previous bleeding symptoms, negative familial history, and occurrence in a relatively older age. Most commonly, acquired von Willebrand syndrome develops in the course of other conditions, such as lymphoproliferative, myeloproliferative, cardiovascular and autoimmune disorders; additionally, it can be associated with some non-hematological malignancies and use of certain prescription drugs...
November 2016: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28026726/-intra-articular-application-of-tranexamic-acid-significantly-reduces-blood-loss-and-transfusion-requirement-in-primary-total-knee-arthroplasty
#7
J Lošťák, J Gallo, J Špička, K Langová
PURPOSE OF THE STUDY The aim of this prospective study was to investigate the effect of topical application of tranexamic acid (TXA, Exacyl) on the amount of post-operative blood loss, and blood transfusion requirement in patients undergoing primary total knee arthroplasty (TKA). Attention was paid to early complications potentially associated with TXA administration, such as haematoma, wound exudate, or knee swelling. In addition, the economic benefit of TXA treatment was also taken into account. MATERIAL AND METHODS The study included 238 patients (85 men and 153 women) who underwent primary total knee arthroplasty (TKA) at our department between January 2013 and November 2015...
2016: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28003785/central-retinal-vein-occlusion-associated-with-high-blood-levels-of-lipoprotein-a-is-lipoprotein-a-a-reliable-marker-for-identification-of-predisposed-individuals
#8
Piergiacomo Grassi, Alberto Salicone, Lorenzo Motta, Mario Salvatore Motta
To report a case of central retinal vein occlusion (CRVO) associated with abnormal elevation of Lipoprotein (a) [Lp(a)] plasma levels, without local or systemic risk factors. A 74-year-old man was referred to our department for cataract surgery in his left eye, and his anamnesis was negative for systemic diseases. Two months later, the patient presented with sudden visual loss in his operated eye, and comprehensive ophthalmic examination was performed, including Fluorescein Angiography (FA) and Optical Coherent Tomography (OCT)...
October 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/27993197/tranexamic-acid-prolongs-survival-after-controlled-hemorrhage-in-rats
#9
Max Roy, Manuel Burggraf, Sven Lendemans, Herbert de Groot, Ricarda Rohrig
BACKGROUND: The plasmin/plasminogen inhibitor tranexamic acid (TXA) is mainly used in elective surgeries with a higher blood loss to avoid uncontrolled bleeding. Recently, TXA has also been shown to reduce mortality in trauma patients. It is assumed that its beneficial effects are principally caused by its antifibrinolytic properties. We hypothesize that TXA also improves survival in a modified Wigger's model of hemorrhagic shock by a mechanism other than antifibrinolysis. MATERIALS AND METHODS: Male Wistar rats were intermittently bled until the mean arterial blood pressure was dropped to 25-30 mm Hg (severe shock)...
February 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/27984847/intraarticular-administration-of-tranexamic-acid-is-safe-and-effective-in-total-knee-arthroplasty-patients-at-high-risk-for-thromboembolism
#10
Ronald E Delanois, Chukwuweike Gwam, Jaydev B Mistry, Morad Chughtai, Melbin Thomas, Prathik P Mudaliar, Anton Khlopas, Vidur Tangri, Michael A Mont
INTRODUCTION: Tranexamic acid (TXA) is an antifibrinolytic agent that can be used to reduce blood loss in total knee arthroplasty (TKA) patients. Due to its thrombogenic properties, intravenous (IV) TXA is contraindicated in patients who have an increased risk of arterial or venous thrombosis. For such patients, intraarticular (IA) TXA may be a safe alternative. In this study, we compare: 1) complication rates; 2) intraoperative blood loss; and 3) need for transfusion in TKA patients who received IA TXA versus patients who used IV TXA...
December 16, 2016: Surgical Technology International
https://www.readbyqxmd.com/read/27957347/high-dose-prolonged-epsilon-aminocaproic-acid-infusion-and-recombinant-factor-vii-for-massive-postoperative-retroperitoneal-hemorrhage-following-splenectomy
#11
Alex T Lee, Christopher R Barnes, Shweta Jain, Ronald Pauldine
The antifibrinolytic agent ε-aminocaproic acid is used to decrease procedural blood loss in a variety of high risk surgeries. The utility of recombinant factor VII administration in massive hemorrhage has also been reported in a variety of settings, though the impact in a surgical context remains unclear. We describe the case of a patient who underwent massive open splenectomy and developed diffuse retroperitoneal bleeding on postoperative day one. Massive transfusion was initiated, but attempts to control hemorrhage with surgical and interventional radiology approaches were unsuccessful, as was recombinant factor VII administration...
2016: Case Reports in Anesthesiology
https://www.readbyqxmd.com/read/27956673/prospective-observational-study-of-the-effect-of-dual-antiplatelet-therapy-with-tranexamic-acid-treatment-on-platelet-function-and-bleeding-after-cardiac-surgery
#12
J Amour, M Garnier, J Szymezak, Y Le Manach, D Helley, S Bertil, A Ouattara, B Riou, P Gaussem
BACKGROUND: The bleeding impact of dual antiplatelet therapy (DAPT), aspirin and clopidogrel, maintained until coronary artery bypass graft surgery (CABG), is still a matter of debate. The lack of preoperative antiplatelet activity measurement and heterogeneity of antifibrinolytic protocols in prior studies make the conclusions questionable. The aim of this prospective study was to determine, after preoperative antiplatelet activity measurement, if the maintenance of DAPT until CABG increases bleeding in patients treated with tranexamic acid (TA)...
December 2016: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/27928886/f376a-m388a-solulin-a-new-promising-antifibrinolytic-for-severe-haemophilia-a
#13
J Parcq, K U Petersen, A Borel-Derlon, P Gautier, M Ebel, D Vivien, Y Repessé
INTRODUCTION: Haemophilia is a major bleeding disorder due to a deficiency of procoagulant factor VIII (type A) or IX (type B). The treatment is substitutive and based on infusion of factor concentrates. Main limitations of this therapy are cost, short factor half-life and the development of inhibitors (up to 30% of severe HA patients). An important aggravating factor of haemophilia is due to a premature fibrinolysis, directing attention to the therapeutic potential of suitable antifibrinolytics...
December 8, 2016: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/27917497/acquired-factor-xiii-inhibitor-associated-with-mantle-cell-lymphoma
#14
Christian P Nixon, Elizabeth H Prsic, Christine A Guertin, Ryan L Stevenson, Joseph D Sweeney
BACKGROUND: Acquired Factor (F)XIII deficiency is a very rare bleeding diathesis with a potentially fatal outcome, previously described in the context of autoimmune disorders and leukemias. There is minimal information on autoantibody characterization and the role of antifibrinolytic therapy in patient management. CASE REPORT: A 79-year-old woman with a 3-month history of bruising and heavy menorrhagia presented with ongoing vaginal bleeding, symptomatic anemia, and a right thigh hematoma...
December 4, 2016: Transfusion
https://www.readbyqxmd.com/read/27913736/additional-effects-of-topical-tranexamic-acid-in-on-pump-cardiac-surgery
#15
Noppon Taksaudom, Sophon Siwachat, Apichat Tantraworasin
OBJECTIVE: Postoperative bleeding after cardiac surgery is commonly associated with hyperfibrinolysis. This study was designed to evaluate the efficacy of topical tranexamic acid in addition to intravenous tranexamic acid in reducing bleeding in cardiac surgery cases. METHODS: From July 1, 2014 to September 30, 2015, 82 patients who underwent elective on-pump cardiac surgery were randomized into a tranexamic acid group and a placebo group. In the tranexamic acid group, 1 g of tranexamic acid dissolved in 100 mL of normal saline solution was poured into the pericardium during sternal closure; the placebo group had 100 mL of saline only...
December 2, 2016: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/27913544/treatment-of-rare-factor-deficiencies-in-2016
#16
Flora Peyvandi, Marzia Menegatti
Rare bleeding disorders (RBDs) are a heterogeneous group of coagulation disorders characterized by fibrinogen, prothrombin, factors V, VII, X, XI, or XIII (FV, FVII, FX, FXI, or FXIII, respectively), and the combined factor V + VIII and vitamin K-dependent proteins deficiencies, representing roughly 5% of all bleeding disorders. They are usually transmitted as autosomal, recessive disorders, and the prevalence of the severe forms could range from 1 case in 500 000 for FVII up to 1 in 2-3 million for FXIII in the general population...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27907937/tranexamic-acid-for-trauma-resuscitation-in-the-united-states-of-america
#17
Mark Walsh, Scott Thomas, Ernest Moore, Hunter Moore, Andres Piscoya, Daniel Hake, Michael Son, Tim Pohlman, Julie Wegner, John Bryant, Alberto Grassetto, Patrick Davis, Nathan Nielsen, Anton Crepinsek, Jacob T Shreve, Francis Castellino
The utilization of tranexamic acid (TXA) for the management of bleeding trauma patients has been a subject of much debate on both sides of the Atlantic and in Australia. As a result of the large randomized controlled study called the Clinical Randomization of an Antifibrinolytic in Severe Hemorrhage (CRASH-2), there was an initial enthusiasm for the use of TXA to treat bleeding patients. However, the adoption of TXA in the United States was delayed by concerns of "knowledge and evidence gaps" of the CRASH-2 study and because of a lack of mechanistic rationale that would explain the survival benefit noted in the study...
December 1, 2016: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/27896241/local-administration-of-tranexamic-acid-during-prostatectomy-surgery-effects-on-reducing-the-amount-of-bleeding
#18
Pejman Pourfakhr, Elham Gatavi, Shahram Gooran, Farhad Etezadi, Mohamad Reza Khajavi, Reza Pourroustaei, Reza Shariat Moharari, Atabak Najafi
BACKGROUND: One of the issues in prostatectomy surgery is bleeding. Although tranexamic acid (TRA) is an antifibrinolytic agent for reducing bleeding, controversies surround its use. OBJECTIVES: In this study, the effect of local administration of TRA on reducing bleeding during prostatectomy surgery was evaluated. METHODS: A total of 186 patients who underwent prostatectomy surgery were assessed in this clinical trial study. Patients were divided randomly into two groups...
November 2016: Nephro-urology Monthly
https://www.readbyqxmd.com/read/27885960/high-dose-tranexamic-acid-reduces-intraoperative-and-postoperative-blood-loss-in-posterior-lumbar-interbody-fusion
#19
Junichi Kushioka, Tomoya Yamashita, Shinya Okuda, Takafumi Maeno, Tomiya Matsumoto, Ryoji Yamasaki, Motoki Iwasaki
OBJECTIVE Tranexamic acid (TXA), a synthetic antifibrinolytic drug, has been reported to reduce blood loss in orthopedic surgery, but there have been few reports of its use in spine surgery. Previous studies included limitations in terms of different TXA dose regimens, different levels and numbers of fused segments, and different surgical techniques. Therefore, the authors decided to strictly limit TXA dose regimens, surgical techniques, and fused segments in this study. There have been no reports of using TXA for prevention of intraoperative and postoperative blood loss in posterior lumbar interbody fusion (PLIF)...
November 25, 2016: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/27871571/spine-tumor-resection-among-patients-who-refuse-blood-product-transfusion-a-retrospective-case-series
#20
Alexandra E Kisilevsky, Liam Stobart, Kristine Roland, Alana M Flexman
STUDY OBJECTIVE: To describe the perioperative blood conservation strategies and postoperative outcomes in patients who undergo complex spinal surgery for tumor resection and who also refuse blood product transfusion. DESIGN: A retrospective case series. SETTING: A single-center, tertiary care and academic teaching hospital in Canada. PATIENTS: All adult patients undergoing elective major spine tumor resection and refusing blood product transfusion who were referred to our institutional Blood Utilization Program between June 1, 2004, and May 9, 2014...
December 2016: Journal of Clinical Anesthesia
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