Active clinical trials for "Blood Coagulation Disorders"

This study is conducted in Europe and North and South America. The primary aim of this observational study is to evaluate the frequency and pattern of bleeding episodes in haemophilia patients receiving preventative treatment with activated recombinant human factor VII. The secondary aim is to evaluate which patients are selected for this treatment, the dose and dose intervals used, and the safety of activated recombinant human factor VII when used as prevention. The study also aims to increase understanding of the unmet medical need and clinical relevance of preventative treatment in haemophilia patients.

This study is conducted in the United States of America (USA). The aim of this study is to investigate the at-home-administration of bypassing agents for treatment of bleeding episodes in patients with congenital haemophilia with inhibitors to factors VIII and IX. We are further investigating how bleeding episodes affect the quality of life of the patient and their family or caregivers.

This is a randomized controlled trial to assess the effect of a levonorgesterel-releasing intrauterine device (LNG IUD, Mirena®) versus a copper IUD (Paraguard®) on coagulation parameters known to be associated with risk of thrombosis (blood clots). Both the LNG IUD and the copper IUD are FDA approved devices for contraception. Women enrolled in this study will be randomized to receive either the LNG IUD or the copper IUD. They will complete a one month bleeding diary prior to insertion of the IUD and again for one month while the IUD is in place. They will undergo phlebotomy (blood draw) at baseline (prior to insertion of the IUD), two and four months. Stored samples will be used to measure D-dimer, C-reactive protein (CRP), antithrombin (AT), factor VIIIc, activated partial thromboplastin time (aPTT) and activated partial thromboplastin time plus activated protein C (aPTT + APC). Both groups will undergo a GYN exam with screening for bacterial vaginosis and gonorrhea/chlamydia cultures prior to insertion of the IUD. A brief survey to assess the women's experience with the IUD, including symptomatology and satisfaction with the device, will be conducted at the four months after insertion.

Children having open heart surgery must be on a heart-lung bypass machine. It is essential that the blood in the heart-lung machine does not clot. This is accomplished by giving a drug called heparin, a "blood thinner". The process of making a clot involves a lot of steps. One of the steps involves a protein called thrombin. Heparin acts on thrombin to keep blood from clotting. A technique has been developed to measure the blood's ability to generate thrombin. The bloods's ability to generate thrombin is measured by a thrombin generation curve (TGC). This curve would be very helpful to know when choosing the dose of heparin. We haven't found any studies using TGC in babies less than a month old. We want to do a study comparing the TGC in 10 newborns without a heart defect to the TGC in 10 newborns with a congenital heart defect. To do this we will need one sample of blood. the sample we need is 3 cc which is a little more than 1/2 teaspoon. The blood sample for both groups is to be taken from the intravenous catheter (IV) the child will have placed for surgery. The newborns without a heart defect will be children having surgery for a non-cardiac problem.

There are no studies evaluating the effect of aging on hemostasis of preeclamptic patients. Additionally, although there are some studies that establish normal reference values for TEG profiles in healthy term pregnant patients, conflicting results have been found in preeclampsia. Reference values are important to establish baseline parameters in cases of pre-eclampsia complicated by postpartum hemorrhage. The investigators will evaluate reference values for TEG in postdelivery preeclamptic patients and the difference between vaginal delivery and cesarean section.

Relationship of edoxaban plasma concentration and blood coagulation in healthy volunteers using standard laboratory tests and viscoelastic analysis

Novel coronavirus disease 19 (COVID-19) is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), this pneumonia was first emerged in December 2019 in Wuhan, China and rapidly spread around the world . Coagulopathy is one of the most significant prognostic factors in patients with COVID-19 and is associated with increased mortality and admission to critical care. Most observed coagulopathy in patients hospitalized with COVID-19 (COVID-19-associated coagulopathy) is characterized by increased D-dimer and fibrinogen levels. 71% of patients who did not survive hospitalization reported to have developed disseminated intravascular coagulation

Hemostasis-related disorders are common in cirrhosis and portal hypertension. However, it is not known whether the net effect of changes in hemostasis in the sense of predisposition to hemorrhagic or thrombotic state. It is suggested that increasing the concentration and activities of Von Willebrand factor (vWF) and decline ADAMTS-13 (A Disintegrin and Metalloproteinase with Trombospondin type 1 motif, member 13) may cause thrombophilic changes in cirrhosis and portal hypertension. The aim of this study was to investigate the changes in ADAMTS-13 (A disintegrin and metalloproteinase with thrombospondin motifs 13) and von willebrand factor (vWF) levels and activities in patients with cirrhosis and portal hypertension.

Fluids administered intravenously may alter whole blood coagulation. However, little is known about the dose-response relationships of hemodilution in plasmalyte-148 solution. Investigators have therefore performed the present study to measure the effect of a plasmalyte-148 solution on the coagulation pathway according to the hemodilution level using a rotational thromboelastometry (ROTEM®) tests.

The purpose of this study is to characterize a new test to assess the rate and time it takes to form a blood clot in people who either do or do not take aspirin.