Dr. Jung Hwan Baek
Department of Radiology & Research Institute of Radiology
University of Ulsan College of Medicine Asan Medical Center
Seoul, South Korea
Case: RFA of thyroid nodule with Moving-shot Technique and VirtuTRAX
Product: VirtuTRAX Instrument Navigator
To monitor the electrode tip during radiofrequency ablation (RFA) of a thyroid nodule with Moving-shot Technique.
GE Healtcare LOGIQ™ E9 ultrasound system
CIVCO VirtuTRAX Instrument Navigator
Well-point Electrode, STARmed
VIVA RF Generator, STARmed
During the insertion of electrode into the thyroid nodule the VirtuTRAX Instrument Navigator allowed continuous monitoring of virtual electrode tip as marked by a “V” on the screen. When we initialize thyroid RFA, the transient hyperechoic zone (echoic area formed by vaporization of nodule tissue) disturbs visualization of the electrode tip; however the on-screen guideline reveals the direction of travel with “V” representing the exact needle tip.
This case demonstrated that monitoring of electrode tip using VirtuTRAX is feasible and helpful for thyroid RFA. The VirtuTRAX device could increase the accuracy and the outcome of thyroid RFA while reducing the complication rate, shortening the procedure time and learning curve. Therefore we recommend this system for the beginners as well as experts in this field.
During RFA of the thyroid, needle tip visualization can be challenging due to vaporization of nodule tissue. Use of VirtuTRAX on-screen guidelines reveals the direction of travel with a “V” ensuring confident placement. VirtuTRAX functions ideally when attached to a rigid RFA electrode.