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43 active trials for Hemorrhage

The Effects of Tranexamic Acid or Placebo on Perioperative Bleeding in Adults Undergoing Liver Transplantation.

Around 230 million major procedures are performed worldwide each year. Postoperative complications after major surgery, especially in solid organ transplants, are associated with a significant increase in costs and mortality. Major bleeding episodes in major surgeries such as liver transplantation are related to a significant impact on morbidity and mortality. In this multicenter study, we aimed to compare the efficacy of tranexamic acid when compared to placebo, administered after anesthetic induction and in continuous infusion during the procedure, on the rate of intraoperative bleeding in adult patients undergoing liver transplantation. Considering its mechanism of action and its pharmacological and clinical properties, we expect to observe a significant reduction in the bleeding rate and in the need for blood components in the perioperative period of adult patients undergoing orthotopic liver transplantation. In this study, only adult ASA III to IV patients (18 to 70 years old), scheduled for orthotopic liver transplantation at the Hospital de Clínicas de Porto Alegre, Santa Casa de Porto Alegre and at the Hospital das Clínicas of the University of Sao Paulo will be included. Exclusion criteria consider patients with a history of acute arterial thrombosis or venous thromboembolism (<1 month), patients with a history of known thrombophilia, Budd-Chiari syndrome, primary biliary cholangitis, primary sclerosing cholangitis, patients with reduced left ventricular function ( ejection fraction <40%), pulmonary hypertension, preoperative pulmonary edema, or severe preoperative hemodynamic changes requiring the use of vasoactive drugs, planned use of tranexamic acid systemically during surgery, hypersensitivity or known allergy to acid tranexamic, history of seizure disorder, patients who have recently suffered a stroke or myocardial infarction (<1 month), patients with subarachnoid hemorrhage in the last 30 days and patients previously undergoing cranial neurosurgery. Major bleeding in this study will be defined as bleeding that results in hemoglobin ? 8.0 g / dL and the patient receiving a transfusion of ? 1 unit of red blood cells; results in a drop in hemoglobin ? 4.0 g / dL and the patient receives a transfusion of ? 1 unit of red blood cells; results in the patient receiving a transfusion of ? 4 units of red blood cells over a 24-hour period; or bleeding leading to surgical reintervention.

Start: March 2021

POCUS-PEAC to Reduce Femoral Arterial Blood Flow

The aim of this study is to evaluate the efficacy on healthy subjects of Point of Care ultrasonographically guided external aortic compression compared to the manual technique already described.

Start: December 2020

The Effect of Fluids on Aortic VTI During C-section

Pregnancy is associated with a myriad of physiologic changes, including expansion of blood volume, decrease in oncotic pressure, and increased cardiac output. The obstetric population is associated with intrapartum hemorrhage. Accordingly, it is important to have an accurate method to assess fluid status in intrapartum patients. The use of standard volume assessment tools including arterial lines and central venous catheters is limited given the brevity of obstetric procedures and the morbidity of these techniques on the awake patients, and the costs. Non-invasive methods to assess volume status (carotid dopplers, direct measurement of blood loss, bio-impedance devices) are imperfect. Echocardiography is an attractive tool to measure fluid status in experienced operators such as anesthesiologists. IVC diameter and variation of aortic velocity time integral are two measures that can be obtained via echocardiography and been studied in spontaneously breathing patients. The purpose of this study is to determine whether these measurements can be used in the assessment of volume status in the laboring patient.

Start: March 2020

Comparative Use of Tranexamic Acid Intravenous and Topical Application in Intertrochanteric Fractures With PFNA

An intertrochanteric (ITF) trochanteric fracture of the femur is an exclusively extra capsular fracture in which the fracture line extends from the greater trochanter to the lesser trochanter. Its incidence has increased significantly over the past decades and is expected to double in the next 25 years, with an important global economic impact . It affects women in the seventh and eighth decades of life, an age group older than femoral neck fractures. For this reason, the mortality of intertrochanteric fractures is twice that of the femoral neck. The treatment is surgical, in which the objective is the stable internal fixation and the patient's early ambulation. Functional outcomes and treatment mortality are related including factors perioperative anemia and blood loss.Even so, even with these precautions, blood loss in this surgical procedure appears to be greater than expected, with blood loss of the order of 2100ml. Blood loss management and the inherent risks of anemia can be circumvented with blood transfusion. However, blood transfusion is not without risks and complications, such as hypersensitivity and hemolytic reactions, cardiac overload, infectious diseases. Homologous transfusions are associated with prolonged hospital stay, increased costs and increased patient morbidity and mortality. So, alternatives have been used to avoid the use of blood such as saline solutions, use of erythropoietin and antifibrinolytic agents . Tranexamic acid (TXA) is a drug that interferes with fibrinolysis, in use for more than 50 years in surgery, particularly in cardiac surgery. Only recently, TXA has sparked interest in orthopedic surgeries. Studies have shown the effectiveness and safety of TXA at FIT, but presented different forms of administration (intravenous, topical, infiltrative) . Despite promising results to contain bleeding in elective orthopedic surgery and fractures, in daily practice, TXA is not very popular, especially in fractures, and has not been used routinely by all doctors. Studies have not been found in the literature about the topical use of TXA compared to intravenous use in FIT.

Start: December 2020

Quantra QStat in Trauma and Liver Transplant

This is a multi-center prospective, observational study of the Quantra System with the QStat Cartridge in trauma patients and patients undergoing liver transplant.

Start: July 2020

NIRS Monitoring in Premature Infants

This study uses frequency domain near-infrared spectroscopy coupled with diffuse correlation spectroscopy (FDNIRS-DCS) technology for monitoring cerebral blood flow (CBF) and cerebral oxygen metabolism (CMRO2) at the bedside for newborns with germinal matrix-intraventricular hemorrhage (GM-IVH) and/or post-hemorrhagic hydrocephalus (PHH) in comparison to newborns with hydrocephalus of a different etiology (VC) and healthy controls (HC). We hypothesize that baseline cerebral metabolic dysfunction is a better biomarker for GM-IVH and PHH severity and response to PHH treatment. This is a Boston Children's Hospital (BCH)-institutional review board(IRB) approved, multi-site study that includes collaboration with Brigham and Women's Hospital (BWH) and Beth Israel Deaconess Medical Center (BIDMC). Pei-Yi Lin receives funding from The National Institute of Health (NIH) to support the study and is the overall principal Investigator (PI) overseeing the study.

Start: April 2015

A Pilot Study to Assess the Feasibility and Tolerability of the AccuFlow Perfusion Sensor for Intrapartum Hemorrhage

Obstetric hemorrhage is one of the leading causes of maternal death worldwide. One of the challenges in management of hemorrhage is that young, healthy women compensate for blood loss via peripheral vasoconstriction, so they maintain their blood pressure and heart rate at normal levels even after experiencing significant blood loss. By the time vital sign abnormalities appear, interventions must be performed extremely rapidly to avoid organ damage and maternal death. Clinical methods of estimating blood loss in real time, such as visual estimation, are notoriously unreliable, and changes in laboratory testing such as hemoglobin levels lag hours behind actual blood loss. A tool which can detect and quantify blood loss in real time, before vital sign changes occur, has the potential to allow for earlier mobilization of resources and intervention in these cases, thus saving lives. This device is meant to detect changes in skin blood flow which reflect vasoconstriction. The investigators believe that this device, therefore, has the potential to be able to detect and quantify blood loss in real-time. However, as this novel device has never been used for this purpose, before undertaking a large clinical trial, the investigators feel it is necessary to perform a pilot study to assess the feasibility and tolerability of this device. The investigators plan to test this by asking 50 patients undergoing planned cesarean section to wear the device during their surgery. The device will collect skin perfusion measurements during the surgery, which will not be available to the operating team. The patients will also be asked to complete a survey regarding their experience wearing the device. The investigators will use this information to ensure that the device is transmitting interpretable data, that patients feel the device is tolerable during surgery, and to ensure that the device can be used in the operating room without any unforeseen logistical challenges which would need to be addressed in planning a larger trial. The investigators will perform a preliminary comparison of sensor readings to laboratory findings, to assist in planning a larger trial.

Start: May 2020

Acutelines: a Large Data-/Biobank of Acute and Emergency Medicine

Research in acute care faces many challenges, including enrollment challenges, legal limitations in data sharing, limited funding, and lack of singular ownership of the domain of acute care. To overcome some of these challenges, the Center of Acute Care of the University Medical Center Groningen in the Netherlands, has established a de novo data-, image- and biobank named "Acutelines". Acutelines is initiated to improve recognition and treatment of acute diseases and obtain insight in the consequences of acute diseases, including factors predicting its outcome. Thereby, Acutelines contributes to development of personalized treatment and improves prediction of patient outcomes after an acute admission.

Start: September 2020

Blood Management During ECMO for Cardiac Support

Extracorporeal membrane oxygenation (ECMO) is a lifesaving procedure used to treat severe forms of heart and/or lung failure. It works by the principal of replacing the function of these organs by taking blood from the patient, provide it with oxygen outside the body and return it to the patient in one continuous circuit. Because of the evaluability of better technology, the use of ECMO has exponentially risen over the last decade. This treatment is very invasive and carries a number of risks. It is mostly used in situations where it seems likely that the patient would otherwise die and no other less invasive measure could change this. Still in large registries 50-60% of patients die which is often due to complications associated with the treatment. One of the most important complication is caused by the activation of clotting factors during the contact with the artificial surfaces of the device. This can lead to clot formation inside the patient or the device. To counterbalance this anticoagulation is needed. Because of the consumption of clotting factors and the heparin therapy bleeding complications are also very common in ECMO. Clinicians are challenged to balance these competing risks and are often forced to transfuse blood products to treat these conditions, which comes with additional risks for the patient. Many experienced centres have reported thromboembolic and bleeding events as the most important contributor to a poor outcome of this procedure. However, no international study combining the experience of multiple centres to compare their practice and identify risk factors which can be altered to reduce these risks. This study has been endorsed by the international ECMONet and aims to observe the practice in up to 50 centres and 500 patients worldwide to generate the largest ever published database on this topic. It will concentrate on patients with severe heart failure and will be able to identify specific risk factors for thromboembolic and bleeding events. Some of these factors may be modifiable by change in practice and can subsequently be evaluated in clinical trials. Some of these factors may include target values for heparin therapy and infusion of clotting factors. This study will directly improve patient management by informing clinicians which measures are associated with the best outcome and indirectly helps building trials to increase the evidence further.

Start: July 2019

Clinical Investigation Evaluating a New Autotransfusion Device in Cardiac and Orthopedic Surgeries

Blood transfusion is at the heart of the therapeutic arsenal when there is a hemorrhage and/or blood loss during a surgery. There are two types of transfusion: the homologous one (blood from a compatible donor) and the autologous or autotransfusion method (which is done with the patient's own blood). Although they can save lives, homologous transfusions can cause significant adverse events. Since then, multiple solutions have been developed to avoid exposing patients to these risks. It is in this context that was born the "Patient Blood Management" (PBM). Thus, the strategy in this PBM has been defined as "the appropriate use of blood and blood components, with the aim of minimizing the use of allogeneic transfusions". In this context, particular interest has been given to autologous transfusion or autotransfusion or cell salvage, the general purpose is to reduce (or even stop) the use of allogeneic products and to reduce the risks associated with the ABO compatibility system, as well as all the adverse effects associated with allogeneic plasma and platelet transfusions. Most autotransfusers available on the market operate by centrifugation. Autotransfusion is already a solution in Patient Blood Management and its efficiency and safety have already been optimized. However, there is still a need to improve the quality of the treated blood with an easier-to-use device that could improve the quality of the blood concentrate. Indeed, with the current devices, it may happen that the use of allogeneic transfusions, plasma and platelets transfusions, is necessary in addition to autologous red blood cells thus reducing the interest of autotransfusion. It is in this context that i-SEP has developed a new autotransfusion device based on a filtration method. Unlike competing devices, the i-SEP device allows the concentration of not only red blood cells (as competitive devices) but also platelets. In this study, the i-SEP device is used in typical clinical applications of autotransfusion: cardiovascular and orthopedic surgeries, where there is a risk of hemorrhage and/or blood loss for example ? 500mL in cardiac surgery and ? 300mL in orthopedic surgery. The study includes a screening phase (? 21Days), surgery phase when the i-SEP device is used (Day 0), a post-surgery phase (Day 1 - Day 6), a first follow-up visit (Day 7 ± 3) and a second follow-up visit (Day 30 ± 7).

Start: September 2020

Tranexamic Acid to Reduce Blood Loss in Hemorrhagic Caesarean Delivery

TRACES trial is a multicenter randomized double blind placebo control therapeutic and pharmaco-biological dose ranging study to measure the effect on blood loss reduction of a single intravenous infusion of two doses regimens (standard dose and low dose) of TA administered at the onset of an active PPH (>800mL) during elective or non-emergent CS and to correlate this clinical effect with the biological effect of fibrinolysis inhibition and the pharmacodynamic measure of TA uterine bleeding and venous blood concentration.

Start: March 2016

Platelet Activation by a Collagen Analogue in Hemorrhagic Situations

Dijon University Hospital and the Dijon-based NVH Medicinal Company have developed a recombinant mini-collagen NVH020B with platelet and Willebrand factor binding activity. Its small size and granular, non-fibrillar presentation make it suitable for use as an injectable hemostat in patients with a hemorrhage or other emergency under antiplatelet therapy.

Start: July 2020

Fibrinogen Early In Severe Trauma studY Junior

Haemorrhage in severe trauma is a significant cause of mortality and is potentially the most preventable cause of death in paediatric trauma patients Trauma Induced Coagulopathy (TIC) is a complex coagulopathy associated with severe trauma Hypo/dysfibrinogenaemia plays an important role in TIC Early replacement of fibrinogen may improve outcomes Fibrinogen replacement is potentially inadequate in standard fixed ratio Major Haemorrhage Protocols (MHP) utilising Plasma and/or Cryoprecipitate The majority of centres utilise cryoprecipitate for additional fibrinogen supplementation as part of a MHP Cryoprecipitate administration is often delayed (between 60 - 120 minutes) in a fixed ratio MHP It is clear early intervention in severe traumatic haemorrhage is associated with improved outcomes - CRASH 2 and PROPPR studies Increasing interest in the use of Fibrinogen Concentrate (FC) in severe bleeding but not supported by high level evidence Benefits of FC - viral inactivation, known dose, easily reconstituted, can be administered quickly in high dose and stored at room temperature in the trauma resuscitation bay 12. No previous studies comparing FC and Cryoprecipitate in bleeding paediatric trauma patients 13. Fibrinogen supplementation will be guided by an accepted ROTEM targeted treatment algorithm 14. Pilot, multi-centre randomised controlled trial comparing FC to Cryoprecipitate (current standard practise in fibrinogen supplementation) 15. Hypothesis: Fibrinogen replacement in severe traumatic haemorrhage can be achieved quicker with a more predictable dose response using Fibrinogen Concentrate compared to Cryoprecipitate 16. It is imperative that robust and clinically relevant trials are performed to investigate fibrinogen supplementation in paediatric trauma patients before widespread adoption makes performing such studies unfeasible

Start: July 2018

MRI of Myocardial Infarction

Heart failure (HF) is an enormous health burden affecting approximately 5.1 million people in the US and is the cause of 250,000 deaths each year. Approximately 50% of HF is caused by myocardial ischemia and requires immediate restoration of coronary blood flow to the affected myocardium. However, the success of reperfusion is partly limited by intramyocardial hemorrhage, which is the deposition of intravascular material into the myocardium. Hemorrhagic reperfusion injury has high prevalence and patients have a much greater risk of adverse left ventricular remodeling, risk of fatal arrhythmia, impaired systolic function and are hospitalized at a greater rate. Recent magnetic resonance imaging techniques have improved assessment of reperfusion injury, however, the association between MRI contrasts and reperfusion injury is highly unclear, and lacks specificity to IMH. Improved imaging of IMH and accurate knowledge about its spatial and temporal evolution may be essential for delivery of optimal medical therapy in patients and critical to identify patients most at risk for adverse ventricular remodeling. The overall goal is to investigate the magnetic properties of hemorrhage and develop MRI techniques with improved specificity to hemorrhage. New MRI techniques permit noninvasive assessment of the magnetic susceptibility of tissues and can target tissue iron. Therefore, the investigators hypothesize that MRI imaging of myocardial magnetic susceptibility can map hemorrhagic myocardium. The investigators will perform a longitudinal observational study in patients after reperfusion injury to validate these methods, compare the methods with conventional MR contrasts and develop MR methods for imaging humans.

Start: April 2018

Effectiveness of the Pressure Recording Analytical Method in Predicting Fluid Responsiveness in Pediatric Critical Care Patients

The Pressure Recording Analytical Method, invasive hemodynamic monitoring, is an uncalibrated pulse contour analysis, installed in the Mostcare® system that allows a continuous estimation of the stroke volume and thus the cardiac output, by the relationship between the area under the curve of the systolic portion of the arterial blood pressure curve and the dynamic impedance of the cardiovascular system. The objectives of the study are to determine if the parameters measured by Mostcare® make it possible to predict the response to volume expansion in pediatric surgical critical care patients, sedated, intubated and ventilated, by comparing the changes in stroke volume, induced by a volume expansion, measured by trans-thoracic echocardiography.

Start: June 2020

Traumatic Injury Clinical Trial Evaluating Tranexamic Acid in Children: An Efficacy Study

Trauma is the leading cause of death and disability in children in the United States. The objective of this study is to evaluate the benefits and harms of tranexamic acid (TXA; a drug that stops bleeding) in severely injured children with hemorrhagic brain and/or torso injuries. Using thromboelastography, we will measure baseline fibrinolysis to assess for treatment effects of TXA at different levels of fibrinolysis.

Start: October 2021

Tooth Extraction in Patients With Atrial Fibrillation in Use of New Oral Anticoagulants

The purpose of this study is to evaluate the safety of a protocol which does not suspend the new oral anticoagulants (dabigatran, rivaroxaban and apixaban) in front of dental extractions in patients with non-valvular atrial fibrillation.

Start: May 2017

PRospective Multicenter Observational Study on Transfusion Practice in Vv-ECMO Patients: The PROTECMO Study

Background: Over the past decade, the use of extracorporeal membrane oxygenation (ECMO) for respiratory support in adults has increased. Several trials have highlighted how red blood cells transfusion can cause several negative effects and, currently, a restrictive transfusion trigger in critically ill patients is widely accepted. The optimal management of anticoagulation targets and transfusion practice in veno-venous-ECMO (VV-ECMO) patients is still under debate. Traditionally, the threshold for transfusions of packed red blood cells (PRBC) in ECMO is aimed at keeping hemoglobin (Hb) values in the normal range (12-14 g/dL), but some case series have shown how the Hb target can be lower, and with comparable clinical outcomes. While there are extensive reviews on predicted ECMO survival, and management (even with many debated issues), there is a significant knowledge gap in understanding the benefits and risks of transfusions during VV-ECMO Methods/Design: Prospective observational multicenter study. The principal aim is to describe current effective blood product usage, during VV-ECMO. The secondary aim is to describe in a large cohort of ECMO patients the current anticoagulation strategy and bleeding episodes occurrence. The study will be conducted at a multicenter level including in each center all consecutive adult vv-ECMO patients during one year up. The data collection will include pre-ECMO characteristics, transfusion strategies and blood test results during the first twenty-eight days after ECMO cannulation or until the end of ECMO support if the length is shorter, and clinical outcomes up to the end of ICU stay. The descriptive variable end points for the primary aim will be the daily and the total amount of PRBC and other blood products (Plasma, Platelets, Fibrinogen, Antithrombin III). The descriptive variable end points for the secondary aim will be the type and dose of anticoagulation, and episodes of bleeding according to site and severity. Expected Results: A collaborative combination of ECMO centers will evaluate prospective data of transfusion practices during ECMO. The investigators would be able to describe the currently strategy for administration of blood products, anticoagulation and the effective incidence of bleeding episodes worldwide.

Start: December 2018

Effect of Portal Vein Thrombosis on the Prognosis of Liver Cirrhosis

The prevalence of portal vein thrombosis (PVT) in patients with liver cirrhosis is 5-20%. Current evidence regarding the effect of portal vein thrombosis on the prognosis of cirrhotic patients remains under debate. Considering that PVT potentially elevates the portal pressure and thereby increase the risk of variceal bleeding, we focus on the patients with high-risk varices and variceal bleeding as the study population. Thus, the main goals are to analyze the effect of PVT on the incidence of first variceal bleeding in patients without any prior bleeding history but with high-risk varices, the incidence of recurrent variceal bleeding in patients with a history of variceal bleeding, and the treatment failure rate of variceal bleeding in patients with acute variceal bleeding. Certainly, the survival is also observed in all patients.

Start: December 2014

The Third, Intensive Care Bundle With Blood Pressure Reduction in Acute Cerebral Hemorrhage Trial

Continued uncertainty exists over benefits of early intensive blood pressure (BP) lowering in acute intracerebral hemorrhage (ICH), related to the non-significant primary outcomes, patient selection, and discordant results of INTERACT2 and ATACH-II. We designed INTERACT3 to determine the effectiveness of a goal-directed care bundle of active management (intensive BP lowering, glycemic control, treatment of pyrexia and reversal of anticoagulation) vs. usual care in ICH. INTERACT3 is a large-scale pragmatic clinical trial to provide reliable evidence over the effectiveness of a widely applicable goal-directed care bundle in acute ICH.

Start: December 2017