Clinical trial Recruiting at 22 sites Interventional Ages 18 and up

Assessing the risk of post-thrombotic syndrome in patients with deep vein thrombosis

Official title: Baseline Ultrasound Venous Thrombosis Burden and the Risk of Post-thrombotic Syndrome in Patients With a First Acute Episode of Symptomatic Deep Vein Thrombosis of the Lower Limbs - The "DVT-Burden" Project -

Run by Centre Hospitalier Intercommunal de Toulon La Seyne sur Mer · NCT06385353 · Data updated 2026-11-12

This study is trying to find out which patients with a first-time blood clot in their leg are more likely to develop post-thrombotic syndrome so that better treatments can be offered.

More Postthrombotic Syndrome trials

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment400 (estimated)
SponsorCentre Hospitalier Intercommunal de Toulon La Seyne sur Mer
Academic / other
Locations27 sites (Vichy, Allier and 26 other locations)
StatusRecruiting
StartedJune 5, 2024
Main results expectedJune 2027
Study endsJune 2027
Registry record updatedJuly 7, 2026
Trial IDNCT06385353 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults aged 18 years and older who have been diagnosed with acute deep venous thrombosis of the lower limbs.

Probably not a fit

Patients with conditions such as active cancer, bilateral venous thrombosis, or those who are pregnant or breastfeeding may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This multicenter prospective cohort study aims to evaluate the burden of deep vein thrombosis (DVT) and other prognostic factors that may predict the occurrence and severity of post-thrombotic syndrome (PTS). Patients diagnosed with a first episode of DVT in the lower limbs will be recruited and monitored through follow-up visits at one week, one month, three months, and six months. During these visits, clinical assessments, venous ultrasound evaluations, and blood samples will be collected to analyze inflammation and coagulation factors. The study seeks to identify high-risk patients to improve treatment strategies and reduce the incidence of PTS.

Why it matters

Potential benefit: If successful, this study could lead to better prevention and management strategies for patients at risk of developing post-thrombotic syndrome.

How similar studies have gone: Other studies have explored prognostic markers for post-thrombotic syndrome, but this specific approach focusing on DVT burden is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Age ≥ 18 years
2. Patients with symptomatic acute deep venous thrombosis of the lower limbs confirmed by ultrasound on the criteria of venous incompressibility and direct image of the thrombus (patients with stable pulmonary embolism associated with a symptomatic deep venous thrombosis can be included)
3. Affiliates or beneficiaries of a social security scheme.

Exclusion Criteria:

1. Pregnant women, women in labour or breastfeeding mothers.
2. Pulmonary embolism haemodynamically unstable defined by systolic blood pressure \< 90 mmHg or a drop in systolic blood pressure of at least 40 mmHg during at least 15 min, shock or cardiac arrest.
3. Asymptomatic venous thrombosis.
4. Symptomatic venous thrombosis of both lower limbs (patients with bilateral deep venous thrombosis but symptomatic on one side only can be included).
5. History of ipsilateral or contralateral venous thrombosis of the lower limb.
6. Fracture or orthopedic surgery of the lower limbs in the last 3 months.
7. Dependance caused by age or secondary to a chronic affection, going from the inability to stand up or walk alone without help to bed or armchair rest over.
8. Prophylactic or therapeutic anticoagulant treatment \> 5 days.
9. Expected duration of anticoagulant treatment \< 3 months (all patients must have a minimum treatment of 3 months).
10. Patient estimated at high risk of bleeding according to investigator clinical judgment (renal, platelet, digestive, hepatic, neurological... origin) .
11. Indication for interruption of the inferior vena cava or venous recanalisation (endovascular, thrombolysis or surgery).
12. Refusal or inability to give written informed consent to participate in the study.
13. Life expectancy \< 6 months.
14. Patients under legal protection (guardianship, curatorship, etc.) or safeguard of justice.
15. Patients taking part in a research project for venous thromboembolism that can interfere with the conduct of DVT-BURDEN research.

Where it's running

  • CH de Vichy
    Vichy, Allier, France
    Recruiting
  • Centre Hospitalier de Carcassonne
    Carcassonne, Aude, France
    Recruiting
  • Hôpital Saint Joseph
    Marseille, Bouches-du-Rhône, France
    Recruiting
  • Hôpital La Timone, AP-HM
    Marseille, Bouches-du-Rhône, France
    Recruiting
  • Cabinet libéral
    Ajaccio, Corse-du-sud, France
    Recruiting
  • Cabinet libéral
    Ajaccio, Corse-du-sud, France
    Recruiting
Show 21 more locations
  • CHU de Dijon
    Dijon, Côte d'Or, France
    Recruiting
  • CHU de Besançon
    Besançon, Doubs, France
    Recruiting
  • Centre Hospitalier Universitaire de Brest
    Brest, Finistère, France
    Recruiting
  • Clinique Rive Gauche
    Toulouse, Haut-Garonne, France
    Recruiting
  • CHU de Toulouse
    Toulouse, Haute-Garonne, France
    Recruiting
  • CHU Saint Etienne
    Saint-Priest-en-Jarez, Pays de la Loire Region, France
    Recruiting
  • Hospices Civils de Lyon, Hôpital Edouard Herriot
    Lyon, Rhône, France
    Recruiting
  • Centre Hospitalier Universitaire Amiens Picardie
    Amiens, Somme, France
    Recruiting
  • Polyclinique Les Fleurs
    Ollioules, Var, France
    Recruiting
  • Cabinet libéral
    Sanary-sur-Mer, Var, France
    Recruiting
  • Cabinet libéral
    Six-Fours-les-Plages, Var, France
    Recruiting
  • Centre Hospitalier Intercommunal Toulon La Seyne-sur-Mer
    Toulon, Var, France
    Recruiting
  • Centre Hospitalier d'Avignon
    Avignon, Vaucluse, France
    Recruiting
  • Centre Hospitalier Universitaire de Nantes
    Nantes, France
    Recruiting
  • Hôpital Saint Joseph
    Paris, France
    Recruiting
  • Hôpital Européen Georges Pompidou
    Paris, France
    Recruiting
  • Hôpital d'Aubagne
    Aubagne, Bouches-du-Rhône, France
    Not yet recruiting
  • Cabinet libéral
    Martigues, Bouches-du-Rhône, France
    Terminated
  • Centre de Santé Polyvalent de UGESSAP
    Montoir-de-Bretagne, Loire-Atlantique, France
    Terminated
  • Centre Hospitalier de Fréjus/Saint-Raphaël
    Fréjus, Var, France
    Terminated
  • Centre cardio-vasculaire Esterel
    Saint-Raphaël, Var, France
    Withdrawn

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.