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Study identifier: NCT05735639 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

THRomboprophylaxis in Individuals Undergoing Superficial endoVEnous Treatment (THRIVE)

Condition: Venous Thromboembolism · Varicose Veins  ·  Sponsor: Imperial College London

PhasePhase 4
Planned participants3175
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

Endovenous interventions are keyhole operations for varicose veins that are carried out from within the vein itself. Varicose veins are enlarged veins close to the surface of the skin. They are connected to the bigger deeper veins in the leg (known as deep veins). Because of this, operations to close the varicose veins can increase the chance of a blood clot forming in the deep veins. Blood clots in the deep veins happen in around 1 in 50 people after endovenous operations. A clot in the leg can cause swelling, pain, and other long-term problems. If a clot in the leg breaks off and travels to the lungs, it can cause problems with the lung' ability to move oxygen from the air into the blood and may, in rare cases, be life threatening. Varicose vein procedures may carry a slightly higher risk of blood clot formation, and we are currently unsure if current clot reducing medicines are beneficial in preventing blood clots in people having varicose vein procedures. This study will investigate if it is worthwhile prescribing medicines to reduce blood clots after varicose vein procedures.

This description comes directly from the study's public registry record.

Talk to the study team

Sarah Whittley  ·  +442033117309  ·  s.whittley@imperial.ac.uk

Always discuss trial participation with your own doctor first.

Locations (1)

Imperial College Hospital NHS Foundation TrustLondon, United KingdomRecruiting

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Source record: clinicaltrials.gov/study/NCT05735639