Effect of Oral Antiplatelet or Anticoagulant Drugs on Postoperative Bleeding Risk and Venous Closure Rate in Patients With Lower Extremity Varicose Veins After Radiofrequency Ablation
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Antiplatelet or Anticoagulant Drugs.
- Who it may be relevant to
- Registry conditions: Oral Antiplatele, Anticoagulant Drugs, Lower Extremity Varicose Veins, Radiofrequency Ablation. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Center list to be confirmed — check the primary protocol.
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
This observational study aims to assess the effect of oral antiplatelet or anticoagulant drugs on key postoperative outcomes in patients with lower extremity varicose veins who have undergone radiofrequency ablation. Its main objectives are to determine the impact of these medications on postoperative 30-day bleeding risk and postoperative 3-month venous closure rate in this patient population. Researchers will compare three groups-patients receiving oral antiplatelet drugs, those receiving oral anticoagulant drugs, and those not receiving either type of drug-to identify differences in the two key outcomes. Participants will complete baseline data collection (including medical history, medication use, and lower extremity venous assessment) before or shortly after radiofrequency ablation, undergo 30-day postoperative follow-up to evaluate bleeding events (such as minor bleeding or major bleeding requiring medical intervention), receive venous ultrasound at 3 months postoperatively to measure venous closure rate, and report any medication changes or adverse events during the follow-up period.
Interventions
- Drug Antiplatelet or Anticoagulant Drugs
The goal of this observational study is to assess the effect of postoperative continuous use of standard-dose oral antiplatelet (e.g., aspirin, clopidogrel) or anticoagulant drugs (e.g., warfarin, direct oral anticoagulants) on key postoperative outcomes in patients with primary lower extremity varicose veins who have undergone endovenous radiofrequency ablation (RFA) of the great saphenous vein. Unlike studies focusing on preoperative medication adjustment or single-drug cohorts, this study spe
Primary outcome measures
- 6-month postoperative venous closure rate [Time frame: 6 month]
- 6-month postoperative venous closure rate [Time frame: 6-month]
Eligibility criteria
Inclusion criteria
- Aged 18 years or older, with a confirmed diagnosis of primary lower extremity varicose veins (CEAP classification C2-C6) based on clinical examination and duplex ultrasound.
- Underwent endovenous radiofrequency ablation (RFA) of the great saphenous vein as the primary intervention.
- Postoperatively, either: (a) continuously uses standard-dose oral antiplatelet drugs (e.g., aspirin 100mg/day, clopidogrel 75mg/day) or oral anticoagulant drugs (e.g., warfarin with INR maintained at 2.0-3.0, direct oral anticoagulants at standard therapeutic doses) as per clinical routine, or (b) does not use any antithrombotic drugs.
- Able to understand and comply with the follow-up schedule (including 30-day bleeding assessment and 6-month duplex ultrasound examination) and provide informed consent.
Exclusion criteria
- Presence of secondary varicose veins caused by deep vein thrombosis, venous malformation, or other vascular disorders.
- History of coagulation disorders (e.g., hemophilia, thrombocytopenia with platelet count <100×10⁹/L) or use of other antithrombotic agents (e.g., low-molecular-weight heparin, glycoprotein IIb/IIIa inhibitors) postoperatively.
- Major bleeding events (e.g., gastrointestinal bleeding, intracranial hemorrhage) within 3 months prior to RFA.
- Severe hepatic insufficiency (Child-Pugh class C), renal insufficiency (eGFR <30 mL/min/1.73m²), or other life-threatening systemic diseases.
- Unable to complete follow-up due to mental disorders, mobility limitations, or other reasons, or refusal to sign the informed consent form.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Observational model
- Cohort
Study locations
Center list to be confirmed — check the primary protocol.
Publications
- San Norberto Garcia EM, Merino B, Taylor JH, Vizcaino I, Vaquero C. Low-molecular-weight heparin for prevention of venous thromboembolism after varicose vein surgery in moderate-risk patients: a randomized, controlled trial. Ann Vasc Surg. 2013 Oct;27(7):940-6. doi: 10.1016/j.avsg.2013.03.006. PMID 23993109
- Gonzalez Ochoa AJ, Carrillo J, Manriquez D, Manrique F, Vazquez AN. Reducing hyperpigmentation after sclerotherapy: A randomized clinical trial. J Vasc Surg Venous Lymphat Disord. 2021 Jan;9(1):154-162. doi: 10.1016/j.jvsv.2020.06.019. Epub 2020 Jul 30. PMID 32739509
- Beyer-Westendorf J, Schellong SM, Gerlach H, Rabe E, Weitz JI, Jersemann K, Sahin K, Bauersachs R; SURPRISE investigators. Prevention of thromboembolic complications in patients with superficial-vein thrombosis given rivaroxaban or fondaparinux: the open-label, randomised, non-inferiority SURPRISE phase 3b trial. Lancet Haematol. 2017 Mar;4(3):e105-e113. doi: 10.1016/S2352-3026(17)30014-5. Epub 20 PMID 28219692
Identifiers
NCT: NCT07208695 · ChengduUTCM 276