Heparin-Induced Thrombocytopenia Registry

Study Overview
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Brief Summary
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The purpose of the Heparin Induced Thrombocytopenia Registry is to explore the frequency of heparin-induced thrombocytopenia (HIT) at Brigham and Women's Hospital and to assess its mortality rate. Retrospective 3 years, looking forward prospectively.

Detailed Description
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Heparin-induced thrombocytopenia (HIT) is an immune-mediated adverse drug reaction with potentially fatal complications of venous and arterial thrombosis. HIT with thrombosis causes prolonged hospital length of stay and is associated with catastrophic outcomes such as extremity amputation as well as death. The fear of HIT has led to some proposals to minimize hospital use of unfractionated heparin (UFH) and low molecular weight heparin (LMWH) and to substitute other anticoagulants that have not been reported to cause HIT. Therefore, the frequency of confirmed HIT and the frequency of determining whether UFH or LMWH is the causative agent urgently require further investigation. At BWH, we have placed patient safety at a premium. We have a Patient Safety Committee and a Patient Safety Officer. HIT has been identified as one of the primary problems requiring urgent policy decisions. Consequently, we have formed a multi-disciplinary team of physicians, pharmacists, nurses and physician's assistants to improve safe medication practices for patients receiving anticoagulation. Our primary objectives are to establish an HIT registry which will provide information on: Incidence of HIT associated with UFH and LMWH Outcomes of patients with HIT Adverse events associated with alternative anticoagulants used to treat HIT We will obtain data with respect to: Drug, Dose, Route of administration, Duration of therapy, Platelet count, Platelet nadir, Co-morbidities (Coronary Artery Disease, Diabetes Mellitus, Myocardial Infarction, Hypertension, Pulmonary Disease, Chronic Renal Failure, Malignancy, Liver Disease, Surgery, Sepsis), Baseline characteristics (Age, Sex, Weight), Pregnancy status, Serum Creatinine, AST, ALT, Hematocrit, Hemoglobin, Venous and Arterial Thrombotic events (DVT, PE, CVC), 30-day mortality rate, alternative anticoagulant therapy, and duration of therapy. Time and Method of Data Collection: Chart Review for the duration of hospitalization: Hemorrhagic event, Thrombotic events, and 30-day Mortality Rate.

Official Title
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A 3 Year Retrospective Heparin Induced Thrombocytopenia Registry (HIT) at Brigham and Women's Hospital.

Conditions
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Heparin-Induced Thrombocytopenia

Participation Criteria
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Eligibility Criteria
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All patients hospitalized at BWH who have a PF4-Positive antibody test
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| HIT Patients<br>Patients at Brigham and Women's Hospital diagnosed with Heparin Induced Thrombocytopenia. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of HIT associated with UFH and LMWH |  | 30 Days | 
| Outcomes of patients with HIT |  | 30 Days | 
| Adverse events associated with alternative anticoagulants used to treat HIT |  | 30 Days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mortality |  | 30 Days | 
| Hemorrhagic Events |  | 30 Days | 
| Thrombotic Events |  | 30 Days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Heparin, Unfractionated Heparin, Low Molecular Weight Heparin, Anticoagulation, Thrombocytopenia, Thrombosis, Venous Thrombosis, Pulmonary Embolism