Design and implementation of an electromagnetic ultrasound-based navigation technique for laparoscopic ablation of liver tumors

Design and implementation of an electromagnetic ultrasound-based navigation technique for... Background Efficient laparoscopic ablation of liver tumors relies on precise tumor visualization and accurate positioning of ablation probes. This study evaluates positional accuracy and procedural efficiency of a dynamic navigation technique based on electromagnetic-tracked laparoscopic ultrasound (ELUS) for laparoscopic ablation of liver tumors. Methods The proposed navigation approach combines intraoperative 2D ELUS-based planning for navigated positioning of ablation probes, with immediate 3D ELUS-based validation of intrahepatic probe position. The environmental influence on electromagnetic-tracking stability was evaluated in the operation room. Accuracy of navigated ablation probe positioning assessed as the target-positioning error (TPE), and procedural ec ffi iency den fi ed as time eo ff rts for target den fi ition/navigated targeting and number of probe repositionings, were evaluated in a laparoscopic model and compared with conventional laparoscopic ultrasound (LUS) guidance. Results The operation-room environment showed interferences < 1 mm on the EM-tracking system. A total of 60 targeting attempts were conducted by three surgeons, with ten targeting attempts using ELUS and ten using conventional LUS each. Median TPE and time for targeting using ELUS and LUS were 4.2 mm (IQR 2.9–5.3 mm) versus 6 mm (IQR 4.7–7.5 mm), and 39 s (IQR 24–47 s) versus 76 s (IQR 47–121 s), respectively (p < 0.01 each). With ELUS, median http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Surgical Endoscopy Springer Journals

Design and implementation of an electromagnetic ultrasound-based navigation technique for laparoscopic ablation of liver tumors

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Medicine & Public Health; Surgery; Gynecology; Gastroenterology; Hepatology; Proctology; Abdominal Surgery
ISSN
0930-2794
eISSN
1432-2218
D.O.I.
10.1007/s00464-018-6088-1
Publisher site
See Article on Publisher Site

Abstract

Background Efficient laparoscopic ablation of liver tumors relies on precise tumor visualization and accurate positioning of ablation probes. This study evaluates positional accuracy and procedural efficiency of a dynamic navigation technique based on electromagnetic-tracked laparoscopic ultrasound (ELUS) for laparoscopic ablation of liver tumors. Methods The proposed navigation approach combines intraoperative 2D ELUS-based planning for navigated positioning of ablation probes, with immediate 3D ELUS-based validation of intrahepatic probe position. The environmental influence on electromagnetic-tracking stability was evaluated in the operation room. Accuracy of navigated ablation probe positioning assessed as the target-positioning error (TPE), and procedural ec ffi iency den fi ed as time eo ff rts for target den fi ition/navigated targeting and number of probe repositionings, were evaluated in a laparoscopic model and compared with conventional laparoscopic ultrasound (LUS) guidance. Results The operation-room environment showed interferences < 1 mm on the EM-tracking system. A total of 60 targeting attempts were conducted by three surgeons, with ten targeting attempts using ELUS and ten using conventional LUS each. Median TPE and time for targeting using ELUS and LUS were 4.2 mm (IQR 2.9–5.3 mm) versus 6 mm (IQR 4.7–7.5 mm), and 39 s (IQR 24–47 s) versus 76 s (IQR 47–121 s), respectively (p < 0.01 each). With ELUS, median

Journal

Surgical EndoscopySpringer Journals

Published: Feb 12, 2018

References

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