Prevention of Venous Thromboembolism Disease in Emergency Departments

Study Overview
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Brief Summary
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The appropriate use of thromboprophylaxis in medical patients admitted to hospital can substantially reduce the overall burden of disease due to venous thromboembolism. However, the use of thromboprophylaxis in medical setting appears to be generally poor leaving at-risk patients unprotected. We aim to analyse the incidence of symptomatic thromboembolic disease following hospitalisation in medical setting and the efficacy of a multicomponent prevention approach in emergency department including systematic evaluation of thrombosis risk factors and remembers of thrombophylaxis indications and modalities for acutely ill medical patients. Design: cluster randomized interventional study - Observational study at patient level Setting: 30 French emergency departments Patients: Patients over 40 years old admitted in participating emergency departments and hospitalized for acute medical reasons. Main judgment criteria: the rate of symptomatic thromboembolic events and severe haemorrhage during a formal 3-months follow-up after hospital admission in patients hospitalized at least 48 hours.

Detailed Description
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Method: At the end of an observational period of a week, centers will be randomized in two groups: intervention or current practice. In the intervention group, centers will be provided with poster and pocket cards and, if possible, with a computer decision support system remembering venous thromboembolism prophylactic treatment. We will propose no change in current practice in the other group. Primary outcome: the rate of symptomatic venous thromboembolic events and severe haemorrhage during a formal 3-months follow-up after hospital admission in patients hospitalized at least 48 hours. All possible thromboembolic events, severe haemorrhages and deaths will be analysed by an adjudication committee blinded of group assignation. Sudden death without obvious cause according to the adjudication committee will be considered as possible fatal pulmonary embolism. Sample size: We calculated sample size on the basis of primary outcome. Assuming the participation of 30 centers (15 in each group), an intracluster correlation of 0.01, a rate of symptomatic thromboembolic events or severe haemorrhage of 5% in the current practice group, we need a sample of 16170 patients (8085 in each group) to detect a 1.5 percentage absolute difference between the 2 groups (3.5% in the intervention group) with a power of 80% and a significance level of 5%. Considering a rate of patients hospitalized less than 48 hours around 5% and of lost of follow-up around 3%, we anticipated to include 16500 patients for the main analysis and 18000 patients for the overall study. Secondary outcomes: The appropriateness of thromboprophylaxis in the overall population and according to group assignation: Number of patients needing prevention treatment according to international recommendations and who have an appropriate treatment. Number of patients without indication of thromboprophylaxis and who do not receive a treatment The rate of symptomatic venous thromboembolic events during a formal 3-months follow-up after hospital admission in all included patients in patients hospitalized at least 48 hours. inpatients hospitalized less than 48 hours The rate of thromboembolic events in patients who had an appropriate thromboprophylactic treatment in patients who had an inappropriate thromboprophylactic treatment in patients who had no thromboprophylactic treatment The rate of severe haemorrhage in patients who had an appropriate thromboprophylactic treatment in patients who had an inappropriate thromboprophylactic treatment in patients who had no thromboprophylactic treatment

Official Title
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Prevention of Venous Thromboembolism Disease for Acutelly Ill Medical Patients Admitted to Hospital : Systematic Analysis of Thrombosis Risk Factors and Remember of Prevention Treatment Indications in Emergency Departments.

Conditions
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Quality of Health Care

Intervention / Treatment
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* Behavioral: reminders


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: age over 40 years Emergency department admission for non-traumatic reason Hospitalization in medical setting Exclusion Criteria: patients less than 40 years old patients hospitalized in a facility which doesn't participate to the study 3 months follow-up not possible patients refusing that their personal data are used for medical research patients refusing to be reach for the 3 months follow-up

Ages Eligible for Study
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Minimum Age: 40 Years

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 |
| --- | --- |
| Intervention group<br>reminders | Behavioral: reminders<br>* In the intervention group, emergency departments will be provided with poster and pocket cards and, if possible, with a computer decision support system remembering venous thromboembolism prophylactic treatment.<br>|
| current practice group<br>no intervention | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Symptomatic venous thromboembolic events and severe haemorrhage | the rate of symptomatic venous thromboembolic events and severe haemorrhage during a formal 3-months follow-up after hospital admission in patients hospitalized at least 48 hours. All possible thromboembolic events, severe haemorrhages and deaths will be analysed by an adjudication committee blinded of group assignation. Sudden death without obvious cause according to the adjudication committee will be considered as possible fatal pulmonary embolism. | 3 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of symptomatic venous thromboembolic events | - The rate of symptomatic venous thromboembolic events during a formal 3-months follow-up after hospital admission oin all included patients oin patients hospitalized at least 48 hours. oin patients hospitalized less than 48 hours | 3 months | 
| Rate of thromboembolic events | - The rate of thromboembolic events oin patients who had an appropriate thromboprophylactic treatment oin patients who had an inappropriate thromboprophylactic treatment oin patients who had no thromboprophylactic treatment | 3 months | 
| rate of severe haemorrhage | - The rate of severe haemorrhage oin patients who had an appropriate thromboprophylactic treatment oin patients who had an inappropriate thromboprophylactic treatment oin patients who had no thromboprophylactic treatment | 3 months | 
| appropriateness of thromboprophylaxis | - The appropriateness of thromboprophylaxis in the overall population and according to group assignation: oNumber of patients needing prevention treatment according to international recommendations and who have an appropriate treatment. oNumber of patients without indication of thromboprophylaxis and who do not receive a treatment | 3 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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venous thromboembolism disease, emergency, prevention, thromboprophylaxis, medical, hosptitalization, health care risks