View clinical trials related to Thrombocytopenia.
Filter by:Multicenter, Retrospective Data Collection of Routine Clinical Use with the Spectra Optia® Apheresis System for Platelet Depletion Procedures.
The purpose of the study is to investigate whether platelet indices from automated haematology equipment, whole blood impedance aggregometry and a standardized bleeding questionnaire predict bleeding in admitted patients with thrombocytopenia of various causes.
Background: - Platelets are tiny cells in the blood that help stop bleeding. Thrombocytopenia happens when people do not have enough normal platelets. Getting a transfusion of another person s platelets can help stop too much bleeding. But because these cells are from other people, the body may reject them,putting them at risk for serious bleeding complications. This conditions is called alloimmune platelet refractoriness . There are evidence that in many patients, platelet counts fail to increase after a platelet transfusion because the transfused platelets are destroyed by the body s defence soldier, called complement . Researchers want to see if a drug, that inhibits complement, can help increase platelet levels and reduce bleeding Objectives: - To see if eculizumab increases platelet levels more after a transfusion. To see if it reduces the chance of bleeding too much. Eligibility: - Adults 18-75 years old who have thrombocytopenia and alloimmune platelet refractoriness. Design: - Participants will be screened with medical history, physical exam, and blood tests. - Participants will have the procedures listed below. They can have them while they are in the hospital. Or they can go to the outpatient clinic for them. Each visit may take up to 3 hours. - Participants will get a meningitis vaccine if needed. Then they will get the study drug as an infusion. - Participants will have a platelet transfusion. Their blood will be drawn every 24 hours until the platelet count is less than 10,000 per 1 microliter of blood. - They will take antibiotics for 14 days. - Participants will have a checkup and blood drawn twice a week for 2 weeks. They will get more transfusions if needed.
The primary objective of the study is the evaluation of sustained response rate after discontinuation of treatment with TPO-RAs, Eltrombopag and Romiplostim, in persistent or chronic pITP patients who failed one or more therapy lines, splenectomy included.
Aims of the study : 1) To determine whether the presence of the V158 allele of Fc gammaRIIIA gene is associated with a better outcome of Immune Thrombocytopenia (ITP) in adults and especially with a higher response-rate to rituximab. 2) To analyze the impact of therapy and especially rituximab on some B and T cells autoreactive subsets in the peripheral blood. Patients and Methods : Inclusion criteria : age ≥ 18 years, primary ITP defined according to the recent consensual criteria (Rodeghiero F et al. Blood 2009), active ITP defined as an ITP with a platelet count < 50 x 109/L requiring treatment, informed consent. Main exclusion criteria : secondary ITP. Blood samples (serum, plasma, DNA) will be collected in every patient at time of inclusion (pre-treatment) and then sequentially at 3, 6 and 12 months after inclusion in patients treated with rituximab or during the remission phase for other treatments for immunological studies. When a marrow analysis is indicated, some marrow specimens will also be collected and studied and if a patient will have to undergo a splenectomy as a standard of care, some spleen specimens will also be collected. Fc gamma RIIIA V/F158 polymorphism will be assessed by means of an allele-specific PCR. The sequential analysis of anti-platelets (anti-GpIIbIIIa) antibodies producing B cells will be performed by means of flow cytometry and ELISPOT analysis. T cells subsets will be harvested in presence of GpIIbIIIa immunodominant peptides and and cytokines expression will be measured on supernatants on days 2 and 11 in vitro by using Luminex technology in order to characterize and distinguish TH1, TH2, TH17, TFH and Tregs subsets. The primary outcome will be the overall response rate 1 year after inclusion defined by a platelet count > 30 x 109/L with at least a two-fold increase of the initial (pre-treatment) count. For the patients treated with rituximab as a standard of care, based on the overall expected response-rate (40-50%) and based on preliminary data on FcgammaRIIIA V/F158 distribution, the inclusion of 85 patients should be sufficient to show an association of the V158 allele and the response (b risk 20% and a 5%). Responders and non responders will be compared by non parametrical tests, a multivariate analysis will be than performed using a logistic regression model. The immunological data B and T cells subsets) obtained in both the responders and the non responders will be compared over time (To, M3, M6 and M12) by non parametrical matched tests.
This is a phase 3b single arm, open label, multicenter study describing the percentage of time pediatric participants with ITP have a platelet response while receiving romiplostim, defined as a platelet count ≥ 50 x 10^9/L in the absence of ITP rescue medications for the past 4 weeks.
Application of a therapeutic platelet transfusion Regimen in patients with acute myeloid leukemia in complete Remission (consolidation therapy)
This clinical trial is undertaking by Qilu Hospital of Shandong University, aims at evaluating efficacy and safety of rhTPO in management of ITP in pregnancy.
In this single-center, randomized, open-label, crossover, prospective clinical trial, a total of 120 AML patients who achieved remission will be randomized into two groups, of 60 cases in each group. Each subject is required to undergo two cycles of chemotherapy. At the treatment cycle, patients received subcutaneous injection of rhTPO. At the control cycle, rhTPO therapy is not given.The safety of rhTPO is evaluated by the monitoring of liver and renal functions, blood coagulation, and TPO-neutralizing antibody, and adverse events associated with rhTPO treatment are recorded during the study period.
The study is designed to evaluate the association between nosocomial bloodstream infection and the occurrence of thrombocytopenia in surgical critical ill patients.