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Endovenous Ablation of varicose vein |
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Written by Administrator
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Friday, 06 November 2009 08:30 |
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In general, endovenous ablation of varicose veins can be performed chemically by injection of sclerosants,
or thermally by the use of catheter-based systems. Sclerosants can be used as liquids or foam, and they can be administered by simple needle injection or by
the use of more or less sophisticated ultrasound-controlled catheter techniques. Thermal ablation systems are more effective than sclerosants in achieving immediate and more durable vein occlusions when treating saphenous veins. They produce heat in the vein wall by resistive heating of water molecules by bipolar radiofrequency
(RF) current (460 kHz), or by delivery of infrared
laser energy through flexible lightguides to the vein lumen. The most recent technology entering clinical routine treatment delivers energy to the vein wall by RF heating of a 7-cm-long catheter tip segment to 120ºC. All endovenous techniques for vein ablation rely on
continuous ultrasound B-scan monitoring and can be performed under tumescent local anesthesia.
WAEL. M. ELSHIMY
Lecturer of vascular Surgery
Faculty of medicine
Zagazig University
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