Magnetic Resonance Imaging Combined With Venous Ultrasonography of the Legs for Pulmonary Embolism (IRM-EP2)
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|ClinicalTrials.gov Identifier: NCT02059551|
Recruitment Status : Active, not recruiting
First Posted : February 11, 2014
Last Update Posted : October 2, 2018
|Condition or disease||Intervention/treatment||Phase|
|Pulmonary Embolism||Procedure: MRI combined with venous ultrasonography of the legs||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||1058 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||Diagnostic Performances of Magnetic Resonance Imaging Combined With Venous Ultrasonography of the Legs for Pulmonary Embolism|
|Actual Study Start Date :||August 2013|
|Estimated Primary Completion Date :||November 28, 2018|
|Estimated Study Completion Date :||November 28, 2018|
In case of positive D-dimer testing or in patients with a high clinical probability of PE, these patients have MRI protocol combined with venous ultrasonography of the legs. MRI includes 2 different sequences: Unenhanced steady-state-free precession sequences (SSFP) sequences and angiography sequences. (please see \\\"intervention section\\\" for more details). MRI readings will be performed centrally by two independent readers blinded to the results of diagnostic reference standard. Venous ultrasonography of the legs will be interpreted locally.
Procedure: MRI combined with venous ultrasonography of the legs
In case of positive D-dimer testing or in patients with a high probability of PE, MRI and a venous ultrasonography of the legs are done.MRI protocol includes 2 sequences: 1-Unenhanced steady-state-free precession sequences (SSFP) are acquired first without ECG-gating or breath-holding in the axial plane in the multiphase cine mode, with 6 phases per location.The acquisition is repeated to cover 2-3 of the thorax, from the roof of the aorta to the diaphragm. 2- A pulmonary gradient recalled echo (GRE) sequence is performed in the axial plane.The acquisition is triggered to start when contrast enhancement occurred in the right ventricle.Two acquisitions are necessary to cover the anatomy. For each acquisition, 0.15 mL kg-1 body weight of DOTAREM Gadolinium is injected at a rate of 3 mL s-1 followed by an injection of 15 mL of normal saline at 3 mL s-1.Venous ultrasonography of the legs: the examination consists of a real-time B-mode examination of the common femoral and popliteal veins.
- To assess diagnostic performances of MRI combined with venous ultrasonography of the legs in reference to Multi-Detector Computed Tomography and 3 months clinical follow-up [ Time Frame: 51 months ]sensitivity, specificity, positive and negative likelihood ratios of the combination of MRI and venous ultrasonography of the legs
- To assess the diagnostic accuracy of a strategy combining clinical probability, D-dimer measurement, MRI and venous ultrasonography of the legs for PE [ Time Frame: 51 months ]3-month thromboembolic events rate in patients who were left untreated on the basis of negative D-dimer measurement or negative combination of MRI + venous ultrasonography of the legs
- To assess diagnostic performances of each MRI sequence combined or not to venous ultrasonography of the legs in reference to Multi-Detector Computed Tomography and 3 months clinical follow-up [ Time Frame: 51 months ]sensitivity, specificity, positive and negative likelihood ratios of each MRI sequence (unenhanced 2D steady-state-free-precession (SSFP) and contrast-enhanced 3D angiographic MR sequences) combined or not to venous ultrasonography of the legs in reference to Multi-Detector Computed Tomography and 3 months clinical follow-up
- inter-reader agreement for MRI [ Time Frame: 51 months ]Kappa coefficient of concordance calculated on the diagnoses on MRI by two radiologists blinded to the diagnostic reference strategy (multidetector CT angiography and follow-up 3 months).
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Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02059551
|Hôpital Européen Georges Pompidou|
|Paris, France, 75015|
|Principal Investigator:||SANCHEZ Olivier, MD, PhD||Université Paris Descartes; Sorbonne Paris Cité; Service de Pneumologie et Soins Intensifs, Hôpital Européen Georges POmpidou; AP-HP|