High Intensity Focused Ultrasound in PAtients With Varicose Veins in Singapore (VESPA)


Singapore Health Services (SingHealth)


Not yet enrolling


Venous Reflux
Chronic Venous Insufficiency
Varicose Veins


Other: Questionnaires

Study type


Funder types




Details and patient eligibility


The aim of the study is to evaluate the efficacy of non-invasive echotherapy for the treatment of varicose veins, within local population, using the Sonovein® device. The quality of life scores at baseline, 2 weeks, 3 months, 6 months and 12 months will be assessed using the EQ-50D, AVVQ and CIVIQ scores. Patient satisfaction at these time points will also be assessed.

Full description

Sonovein® is a unique echotherapy solution, combining therapeutic ultrasound and ultrasound for monitoring. The high-intensity ultrasound beam is focused on the vein through a magnifying glass. As thermal energy is delivered, the thermocoagulation property of ultrasound energy affects the vein wall, causing shrinking and collapsing of the target vein. Thus creating a fibrotic seal and occluding the vessel. The treated vein is immediately closed after the procedure, and its diameter will continuously reduce over time, becoming a fibrotic chord. The treatment along the vein is steered automatically via a touch screen monitor. In-beam linear ultrasound probe allows visualisation of the vein in real-time and insures optimal accuracy. The study involves prospective data collection of 30 patients that will be undergoing HIFU as choice of treatment for their varicose veins / CVI. Questionnaires will be conducted at 5 timepoints - baseline before procedure, 2 weeks, 3 months, 6 months and 12 months. Subjects will be seen at outpatient clinic post-procedure. Besides questionnaires, physical examination and duplex ultrasound scan will be conducted at 2 weeks, 3 months, 6 months and 12 months to ensure occlusion of treated vein.


15 estimated patients




21 to 90 years old


No Healthy Volunteers

Inclusion criteria

  • Age >21 years, able to understand the requirements of the study and provide informed consent.
  • C2 - C5 varicose veins / CVI
  • Symptomatic primary GSV, SSV or AASV incompetence, with reflux >0.5 seconds on colour duplex, including one or more of the following symptoms: aching, throbbing, heaviness, fatigue, pruritus, night cramps, restlessness, generalized pain or discomfort, swelling.
  • Patients who has GSV, SSV or AASV diameters of 3mm to 12mm in the standing position.

Exclusion criteria

  • Current DVT or history of DVT
  • Recurrent varicose veins
  • Pregnant patients
  • Arterial disease (ABPI<0.8)
  • Sepsis
  • Patients who are unwilling to participate
  • Inability or unwillingness to complete questionnaires
  • Adverse reaction to sclerosant or cyanoacrylate
  • GSV, SSV or AASV severely tortuous
  • Life expectancy < 1 year
  • Active treatment for malignancy other than non-melanoma skin cancer
  • Current, regular use of systemic anticoagulation (e.g. warfarin, heparin)
  • Daily use of narcotic analgesia or NSAIDS to control pain associated with venous disease

Trial design

15 participants in 1 patient group

Patients that have undergone high focused ultrasound treatment for varicose veins
Other: Questionnaires

Trial contacts and locations



Central trial contact

Charyl Yap

Data sourced from clinicaltrials.gov

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