Antoine Hakime, MD, Ali Barah, MD, Frederic Deschamps, MD, Geoffroy Farouil, MD, Julien Joskin, MD, Lambros Tselikas, MD, Anne Auperin, MD and Thierry de Baere, MD, PhD, Institut Gustave Roussy, Paris, France
The Journal of Vascular and Interventional Radiology, 2013; 24: 1682-1689
The authors compared percutaneous liver biopsy procedures performed using free-hand ultrasound-guidance to those performed using electromagnetic needle tracking (EMT). Thirty percutaneous liver biopsies were performed using conventional free-hand US guidance and 30 using the eTRAX™ Needle Tip Tracking system and the GE Healthcare LOGIQ E9 ultrasound system. The study compared needle placement time and number of needle pullbacks and punctures in both groups. The EMT group used a 16-gauge cannula and both groups used an 18-gauge core biopsy needle.
Operator experience and lesion location and size have been reported factors affecting success of conventional liver biopsies. Prior efforts have been made to improve needle placement accuracy and shorten procedure times in biopsy procedures. (1-3) EMT has contributed to addressing these issues through the real-time display of the needle tip and intended needle path as shown in a prior publication. (4) This study prospectively compared EMT versus free-hand biopsy and found EMT needle placement time shorter than free-hand. The EMT group experienced significantly reduced needle placement times (45.8 s ± 48.1 vs. 143.2 s ± 122.1; P< .01), a significant reduction in needle pullbacks (15 vs. 55), and higher diagnostic accuracy (100% vs. 96.6%). No major complications occurred in either group.
Ultrasound-guided liver biopsies performed with EMT showed: