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- W2734989529 abstract "Objective: Failure to accurately locate lesions and place antenna, and unpredictable ablation volumes, can lead to incomplete tumor ablation. Medtronic (Minneapolis, MN) is developing a microwave ablation system that displays real-time, 3D-electromagnetic spatial antenna tracking (SAT) with predictable ablation zones prior to activation. We sought to determine whether SAT affected time and accuracy of antenna placement using an ex-vivo laparoscopic model. Methods: Phantom targets (7–10 mm) were placed in agar (3–7 cm depth) inside a laparoscopic trainer. Four novices (no surgical experience), intermediates (residents), and experts (HPB-surgeons) located and targeted phantoms (10-US only, 10-SAT). Time to locate target, number of attempts to hit target, and time from initiating antenna advance to hitting target were measured. >10 attempts for hit-rate were considered a fail. Results: Participants located 100% of targets using US, experts taking significantly less time (16±2 s) than novices (28±3 s) and intermediates (23±2 s). Using US only, successful hit-rates were 70% (28/40) [novices], 90% (36/40) [intermediates], and 90% (36/40) [experts], experts taking significantly less time to hit targets than novices/intermediates. Using SAT, hit-rate for all 3-groups was 100% and significantly fewer attempts were required (1.18±0.07 vs 4.00±0.51 [novice], 1.25±0.10 vs 4.19±0.44 [intermediate], 1.05±0.03 vs 3.64±0.37 [expert]). Time to hit targets was also significantly reduced for all groups using SAT, the biggest differences being for novices (93±17 s vs 19±3 s) and intermediates (71±13 s vs 19±5 s). Conclusion: SAT significantly improves accuracy and speed of antenna placement independent of prior experience, and is particularly beneficial for those inexperienced at performing laparoscopic targeting for ablation." @default.
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- W2734989529 date "2017-04-01" @default.
- W2734989529 modified "2023-10-05" @default.
- W2734989529 title "A novel 3-dimensional electromagnetic guidance system increases accuracy of microwave antenna placement" @default.
- W2734989529 doi "https://doi.org/10.1016/j.hpb.2017.02.046" @default.
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