Stages in the VNUS Closure Procedure

Mapping of the Saphenous Vein. The procedure begins with ultrasound imaging of the refluxing vein to trace its location. This allows the specialist to determine the site where the Closure catheter will be inserted and to mark the desired position of the catheter tip to begin treatment.

Insertion of the Closure Catheter. Under ultrasound control the Closure catheter is inserted into the vein and advanced to the uppermost segment of the vein. The specialist then injects a volume of dilute anaesthetic fluid into the area surrounding the vein. This numbs the leg, helps squeeze blood out of the vein, and provides a fluid layer outside the vein to protect surrounding tissue from heat once the catheter starts delivering radio-frequency energy.  

Delivery of Radio-Frequency Energy and Withdrawal of Catheter. Non-invasive ultrasound is used to confirm the catheter tip position and the specialist then activates the generator, causing the electrodes at the tip of the catheter to heat the vein wall to a target temperature of 120 degrees Centigrade. As the vein wall is heated, the vein shrinks and the catheter is gradually withdrawn. As the catheter is withdrawn, the generator regularly adjusts the power level to maintain target temperature to effectively shrink collagen in the vein wall and close the vein completely.

Confirmation of Vein Closure. After treatment, ultrasound imaging is used to confirm closing of the vein. If a portion of the vein is not closed, the catheter can be reinserted and energy reapplied. After the procedure, the narrowed vein gradually becomes fibrous, sealing the interior of the vein walls and naturally redirecting blood flow to healthy veins. The procedure is completed in 45 to 60 minutes.

98% of patients who have undergone the Closure procedure are willing to recommend it to a friend or family member.

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