Quick and stable parallel puncture of hepatic tumors using a double-barreled needle direction system for ultrasound-guided bipolar radiofrequency ablation

Hepatology Research : the Official Journal of the Japan Society of Hepatology
Mitsuru SakakibaraKazuhiro Katayama

Abstract

In bipolar radiofrequency ablation (RFA) therapy, insertion of multiple needles at appropriate points on a target is difficult. The aim of our study was to evaluate a simplified method for multielectrode insertion using a newly developed double-barreled needle guidance system for percutaneous RFA of hepatic tumors. RFA using two bipolar electrodes was performed in 15 consecutive patients (nine men, six women; mean age 72.0 ± 8.2 years) with a solitary small (≤3 cm) hepatic tumor. The first five nodules were treated using the conventional puncture method with the standard attachment, then 10 nodules were ablated using the parallel puncture method with the double-barreled attachment. The times required for double-needle placement and the shapes of the ablated areas were compared between the two puncture methods. The parallel puncture method required a shorter time for double-needle placement than the conventional method (12 s, range 8-24 s, vs. 96 s, range 50-240 s; P = 0.0003), and allowed continuous observation of the tip of all needles and the size of the ablated area as it increased until completion of the ablation. The method also provided a stable ellipsoidal ablated area. The median height, width and thickness were 30 mm (...Continue Reading

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Oct 12, 2012·Journal of Gastroenterology·Yukio OsakiKiwamu Okita
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Citations

May 22, 2019·Cardiovascular and Interventional Radiology·Tian-Qi ZhangJin-Hua Huang

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