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New strategy could spare patients from unnecessary blood thinners

NCT ID NCT03868956

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jul 08, 2026 · Updated 2 times

Summary

This study tested a new approach to diagnose whether a blood clot has returned in the leg. Instead of relying on older methods, doctors used color Doppler ultrasound and a D-Dimer blood test to safely rule out a new clot. Over 400 people with a history of deep vein thrombosis took part, and those not treated based on the strategy were followed for 3 months. The goal was to see if this method could avoid unnecessary blood thinner use while still catching dangerous clots.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

466 people

The number who actually took part.

Started

Jan 2020

Finished

Jan 2023

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age \>= 18 years * Known history of objectively documented deep vein thrombosis of the lower limb (with or without pulmonary embolism) * Out-patients referred for clinically suspected acute recurrent ipsilateral DVT of the lower limb i.e. the occurrence of new symptoms and signs of DVT or the increase of symptoms and signs in patients with post-thrombotic syndrome * Patients covered by social security or equivalent regimen * Signed and dated informed consent Exclusion Criteria: * Known current pregnancy * Any condition, which, in the opinion of the investigator may prevent him from performing the colour doppler ultrasound test (plaster cast, inaccessible vein segment after abdominal or pelvic surgery, or other causes that may lead to a technically inadequate CDUS) * Delay from onset of symptoms to inclusion of more than 10 days * Therapeutic anticoagulation for more than 48 hours in the two days prior to consent or a need for long term anticoagulation * Prophylactic anticoagulation for more than 48 hours in the two days prior to consent * Clinical symptoms of pulmonary embolism * Life expectancy less than 3 months * Patient unable to adhere to protocol or follow-up visits and contacts * Participants under legal guardianship or incapacitation * Patient already enrolled in a deep vein thrombosis (DVT) diagnostic research

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Conditions

The condition(s) this trial relates to.

Recurrence venous thromboembolism Venous Thrombosis

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • APHM La Timone

    Marseille, Bouches Du Rhône, 13385, France

  • Cabinet libéral Ben Sedrine

    Six-Fours-les-Plages, Var, 83140, France

  • Cabinet libéral Besancon - polyclinique des Fleurs

    Ollioules, Var, 83190, France

  • Cabinet libéral Bonavita

    Bastia, Haute-Corse, 20200, France

  • Cabinet libéral Bourrinet

    Balma, Haute-Garonne, 31130, France

  • Cabinet libéral Casanova

    Bastia, Haute Corse, 20600, France

  • Cabinet libéral Cazaux

    Auch, Gers, France

  • Cabinet libéral De Mari

    Ajaccio, Corse Du Sud, 20090, France

  • Cabinet libéral Dias

    Istres, Bouches-du-Rhône, 13800, France

  • Cabinet libéral El Haddad

    Marseille, Bouches-du-Rhône, 13011, France

  • Cabinet libéral Esteve

    Tarbes, Hautes-Pyrénées, 65000, France

  • Cabinet libéral Pung

    Aubagne, Bouches-du-Rhône, 13400, France

  • Cabinet libéral Richard

    Sanary-sur-Mer, Var, 83110, France

  • Cabinet libéral Riviere

    Six-Fours-les-Plages, Var, 83140, France

  • Cabinet libéral Secondi

    Ajaccio, Corse Du Sud, 20090, France

  • Cabinet libéral Sidoli

    Marseille, Bouches-du-Rhône, 13003, France

  • Cabinet libéral Wagner

    Lourdes, Hautes-Pyrénées, 65100, France

  • Cabinet libéral Zimmermann

    Six-Fours-les-Plages, Var, 83140, France

  • Centre Hospitalier Intercommunal Toulon La Seyne sur Mer

    Toulon, Var, 83056, France

  • Centre Hospitalier Universitaire Bocage

    Dijon, Cote d'Or, 21079, France

  • Centre Hospitalier Universitaire François Mitterrand

    Dijon, Côte d'Or, 21079, France

  • Centre Hospitalier Universitaire Nord

    Saint-Étienne-de-Montluc, Pays de la Loire Region, 42055, France

  • Centre Hospitalier Universitaire Rangueil

    Toulouse, Haute-Garonne, 31059, France

  • Centre Hospitalier Universitaire d'Amiens

    Amiens, Somme, 80054, France

  • Centre Hospitalier Universitaire d'Angers

    Angers, Maine-et-Loire, 49933, France

  • Centre Hospitalier Universitaire de Clermont-Ferrand

    Clermont-Ferrand, Puy-de-Dôme, 63000, France

  • Centre Hospitalier Universitaire de Grenoble

    Grenoble, Isère, 38700, France

  • Centre Hospitalier Universitaire de Montpellier

    Montpellier, Hérault, 34295, France

  • Centre Hospitalier Universitaire de Nancy

    Nancy, Meurthe Et Moselle, 54511, France

  • Centre Hospitalier Universitaire de Nice

    Nice, Alpes-Maritimes, 06001, France

  • Centre Hospitalier Universitaire de Nîmes

    Nîmes, Gard, 30029, France

  • Centre Hospitalier Universitaire de Rennes

    Rennes, Ille-et-Vilaine, 35033, France

  • Centre Hospitalier d'Auch

    Auch, Gers, 32000, France

  • Centre Hospitalier de Carcassonne

    Carcassonne, Aude, 1060, France

  • Centre Hospitalier de Vichy

    Vichy, Allier, 03200, France

  • Centre d'angiologie

    Carcassonne, Aude, 11000, France

  • Centre d'explorations vasculaires

    Paris, Île-de-France Region, 75116, France

  • Centre de medicine vasculaire interventionnel

    Langon, Gironde, 33210, France

  • Centre hospitalier Universitaire Cavale Blanche

    Brest, Finistère, 29609, France

  • Clinique Rive Gauche

    Toulouse, Haute-Garonne, 31076, France

  • Clinique des Fleurs

    Ollioules, Var, 83190, France

  • Espace Artois Santé

    Arras, Pas-de-Calais, 62000, France

  • Hôpital Edouard Herriot

    Lyon, Rhône, 69003, France

  • Hôpital Saint André

    Bordeaux, Gironde, 33075, France

  • Hôpital Saint Joseph

    Paris, 75674, France

More trials for these conditions

Other studies related to the condition(s) this trial covers.