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Clinical Trial Summary

The aim of the study isto evaluate the inter-observer reliability of the assessment of venous thromboembolic risk using the TRiP(cast) score in patients presenting with trauma to a lower limb requiring immobilisation, and of the clinicians' assessment using the physician's implicit probability (gestalt) compared with the use of the TRiP(cast) score.


Clinical Trial Description

Trauma to the lower limbs requiring orthopedic immobilisation (plaster cast or splint) is a frequent reason for seeking emergency care. Because of the venous stasis caused by immobilisation, hypercoagulability and vascular lesions induced by the trauma, these patients are at risk of developing a venous thromboembolic event (VTE). This risk is estimated at around 2% (95% CI 1.3 to 2.7). To reduce the risk of thrombosis, preventive anticoagulants, mainly low molecular weight heparins (LMWH) and fondaparinux, have been shown to be beneficial. However, not all patients have the same thromboembolic risk factors. A targeted strategy should therefore be used to avoid prescribing treatment to low-risk patients and to prescribe it to the sub-group of patients at high risk. The TRiP(cast) score has been developed and validated for this purpose. In the CASTING study (randomised stepped-wedge trial), patients not receiving thromboprophylaxis on the basis of a TRiP(cast) score <7 had a 3-month rate of symptomatic thromboembolic events of 0.70% (95% CI: 0.21-1.17). Use of the TRiP(cast) score reduced the rate of anticoagulation prescriptions by 26% (24.5% versus 50.4%) without increasing the rate of thromboembolic events at 3 months. Since this study, French recommendations concerning the prescription of anticoagulation treatments have been updated. Since this study, French recommendations concerning the prescription of preventive anticoagulant treatment have been updated by the SFMU (French Society of Emergency Medicine) and the SFMV (French Society of Vascular Medicine). They were presented in June 2023 and are now applied in all emergency facilities. During the review for the publication of the CASTING study, it was discussed whether it would be useful to evaluate the reliability of this score. However, the reliability of the measurement and the reproducibility of the score have never been assessed. Given the importance of assessing the risk of venous thromboembolism in patients with lower-limb trauma when deciding whether or not to prescribe thromboprophylaxis, this assessment is essential. Although this score appears to be objective, there are still items where interpretation may be different. For example, the type of immobilisation cannot be transposed perfectly to all existing immobilisation methods. This study will also be carried out in other European countries. The types of immobilisation vary considerably from one country to another, and the interpretation of certain items could be different. The interpretation of patient characteristics may also vary. Furthermore, this score has never been compared with the clinician's implicit "gestalt" probability, which is used to define patients at risk of venous thromboembolic events. It is a real challenge when implementing scores to assess their added value compared with clinical intuition. The use of scores has an initial educational objective, but it is important to know whether clinical intuition would be sufficient to assess this venous thromboembolic risk. The aim of the study is to evaluate the inter-observer reliability of the assessment of venous thromboembolic risk using the TRiP(cast) score in patients presenting with trauma to a lower limb requiring immobilisation, and of the clinicians' assessment using the physician's implicit probability (gestalt) compared with the use of the TRiP(cast) score. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT06416280
Study type Observational
Source University Hospital, Angers
Contact Delphine DOUILLET
Phone (0)241353637
Email Delphine.Douillet@chu-angers.fr
Status Recruiting
Phase
Start date May 16, 2024
Completion date December 30, 2025

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