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Covidien VNUS

Covidien ClosureRFG™ Radiofrequency Generator

Radiofrequency Generator for Venefit™ Targeted Endovenous Therapy

The ClosureRFG™ generator delivers radiofrequency (RF) energy to the Covidien ClosureFast™ endovenous radiofrequency ablation (RFA) catheter, enabling controlled vein lumen contraction for a fast and effective treatment of Chronic Venous Insufficiency (CVI). Temperature and power are continuously monitored for optimal performance.

The generator can also be used with the Covidien ClosureFast™ 3cm* endovenous radiofrequency ablation (RFA) catheter and the Covidien ClosureRFS™ endovenous radiofrequency stylet providing continuous procedural feedback during the treatment of short refluxing vein segments and refluxing perforator veins, respectively.

This device has been specifically engineered with the end user in mind. A simple and intuitive user interface, combined with a large color screen and optimized internal software

Features

• Intuitive user interface includes colors, symbols, large fonts and clear instructional messages

• Large color screen

• Continuous real-time temperature and power feedback

• Tones communicate procedure status and prompt user

 

Covidien ClosureFast™ Endovenous Radiofrequency Ablation (RFA) Catheter

The Next Generation of Radiofrequency Delivery for Venefit™ Targeted Endovenous Therapy

The ClosureFast™ catheter heats the vein in 7 cm segments with 20-second treatment cycles, resulting in vein shrinkage and occlusion. Data from a prospective multi-center study have shown 93% vein occlusion 3 years post-treatment.1

Technological Advances

Only the ClosureFast™ catheter utilizes a segmental ablation technique

• Allows for rapid and uniform heating of the vein. Eliminates the variability associated with a continuous pull-back technology

Continuous intra-operative feedback from the Covidien ClosureRFG™ radiofrequency generator

• Helps provide a consistent, effective treatment temperature-controlled energy delivery

Enhancements for a simpler procedure

• Lubricious outer jacket on heating element for easy repositioning between segments

Compatible with the ClosureRFG™ generator

Venefit™ Procedure Overview

Catheter Insertion

With the assistance of ultrasound guidance, the ClosureFast™ catheter is inserted into the vein and advanced to where treatment will begin. Final placement of the catheter tip must be 2 cm from the sapheno-femoral junction.

Vessel Preparation

Again, under ultrasound guidance, perivenous anesthesia is delivered to the saphenous compartment surrounding the vein. This is done to enhance patient comfort, provide a heat sink to protect surrounding tissue, and to improve contact between the vein wall and the catheter during treatment.

Segmental Ablation

The Venefit™ procedure uses a segmental ablation technique, which heats a full 7 cm vein length in one, 20-second interval. Physicians also have the option of treating shorter refluxing vein lengths with the ClosureFast™ 3cm* catheter, which heats vein segments in 3 cm lengths. After each segment is treated, unique shaft markings on the catheter aid proper repositioning to the next segment.

Working in concert with the ClosureRFG™ generator, the catheter is able to deliver controlled, consistent heat to each segment. The system’s controlled feedback mechanism monitors intravascular heat parameters in real time to deliver optimal therapeutic power.

Fibrotic Occlusion

The heat provided by the catheter shrinks and collapses the target vein, creating a fibrotic seal and occluding the vessel. Blood flow is naturally redirected to healthy veins as the recovery process begins.

  1. Proebstle T, et al. Three-year European follow-up of endovenous radiofrequency-powered segmental thermal ablation of the great saphenous vein with or without treatment of calf varicosities. JVS; July 2011

* ClosureFast™ 3 cm catheter not available in all markets

 

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