Thrombocytopenia Clinical Trials

This is an open-label, multicenter study to evaluate the safety, tolerability, and efficacy of HMPL-523 in adult subjects with ITP. Read Less

Background: Platelets are cell fragments in the blood that help it clot. Some people get very low platelet counts during a disease or treatment. Low platelet counts can cause severe bleeding. Some people are not helped by platelet transfusions at the standard transfusion rate. This is called platelet transfusion refractoriness (PTR). Researchers want to learn more about transfusing platelets so they can make transfusions more effective. Objectives: To study the effects of transfusing platelets more slowly than the standard rate. To obtain data to improve the effectiveness of platelet transfusions in people with PTR and decrease the risk of bleeding in some people. Eligibility: Adults ages 18-100 who have very low platelet counts requiring platelet transfusion, and have evidence of PTR Design: Participants will be screened with a review their recent NIH medical records. They will have blood drawn. Participants will have up to three 12-hour treatment blocks. They can have only one block per day. During each block, they will have 2 platelet transfusions in those 12 hours. One transfusion will take place over 1 hour (SHORT infusion). The other will take place over 4 hours (LONG infusion). Participants will be randomly put in 1 of 2 treatment groups. This will dictate whether they get the SHORT or LONG infusion first. Participants will have blood drawn: When they enroll Right before each transfusion 2, 4, and 6 hours after each transfusion Each blood draw will consist of a complete blood count. Smaller tubes that require only small amounts of blood will be used to minimize the amount of blood drawn. Read Less

Open-label randomized controlled trial to test the effectiveness of whole blood transfusion for improving survival in children with severe malaria complicated by thrombocytopenia. Read Less

The study is being conducted to validate the clinical performance of the T-TAS 01 HD assay for measurement of thrombogenicity in patients with thrombocytopenia receiving a platelet transfusion. Read Less

This study evaluates the risks and experience of blood clots and bleeding in patients with blood cancers. While it is standard of care to use medications to reduce the risk of blood clots in hospitalized individuals, some patients with blood cancers have low platelet counts that can increase the concern for bleeding complications associated with these medications. At this time, the optimal management strategies for blood clots are not well known for patients with blood cancers. This pilot study evaluates additional information that could help doctors know which patients are at highest risk for blood clots. Read Less

Determine whether clinical decision support (best practice advisory) improves provider adherence to transfusion guidelines for all four major blood components (red blood cells, plasma, platelets, and cryoprecipitate) using a randomized study design to reduce risk of bias. Alerts will be visible to the experimental ordering provider group, while they will not be visible to the control. Both groups still have access to information about best practices: local clinical transfusion guidelines are available and education on blood transfusion best practices will continue regardless of randomization assignment. Read Less

The purpose of this study is to determine if using avatrombopag in patients with thrombocytopenia due to temozolomide treatment can safely improve a patient's platelet count and allow the patient to complete the temozolomide treatment course as planned. Read Less

If your serious vaccine-induced adverse event has been entered in the CDC Vaccine Adverse Event Reporting System (VAERS) we are interested in enrolling you for this study in order to log your symptoms. The primary goal of this study is to create a national database and gather vaccine-associated serious adverse events/injury data from newly vaccinated individuals in the US in order to identify the possible underlying causal relationships and plausible underlying biological mechanisms. The project aims to identify the genetic determinants of vaccine-induced adverse response by studying host genetics. We plan to use whole genome sequencing to identify single nucleotide polymorphisms associated with cardiovascular, neurological, gastrointestinal, musculoskeletal and immunological symptoms induced by vaccine administration. The secondary goal is to establish criteria that enable classification of vaccine-induced adverse events/injuries compare data from our database with the official Vaccine Injury Table National Vaccine Injury Compensation Program on or after March 21, 2017. The tertiary goal is to establish a database to gather detailed long-term adverse reaction data from subjects enrolled in FDA Emergency Use Authorized vaccine clinical trials. Read Less