Intraoperative ultrasound based navigation for laparoscopic ablation of liver tumors

Paolucci, Iwan; Schwalbe, Marius; Prevost, Gian Andrea; Lachenmayer, Anja; Candinas, Daniel; Weber, Stefan; Tinguely, Pascale Marie Pia (18 May 2018). Intraoperative ultrasound based navigation for laparoscopic ablation of liver tumors. British journal of surgery, 105(Suppl3), p. 21. John Wright & Sons

Objective: We evaluated a navigation technique for laparoscopic ablation of malignant liver lesions that relies on intraoperative ultrasound only, thus reduces additional efforts and inaccuracies by not incorporating calibration and registration processes compared to other techniques. Methods: The target tumor was selected on an electromagnetically (EM) tracked ultrasound image and the ablation probe placed into the target using an EM tracked trocar. After the placement, a 3D ultrasound image was used for validation of the probe position and measurement of the target positioning error (TPE). Three surgeons performed 10 ablation probe placements using the navigated approach and the non-navigated (conventional) approach in a laparoscopic model. We compared the number of probe repositionings, TPE, and time for targeting. Results: Overall, 60 targetings were performed using the navigated and the non-navigated approach (n = 30 each). In the navigated targetings no probe repositionings were needed, whereas in 17 of the 30 (59%) non-navigated targetings the probe had to be repositioned to hit the tumor. The median TPE was 4.2 mm (IQR 2.9-5.3 mm) versus 6 mm (IQR 4.7-7.5 mm) and the median time for targeting was 39 seconds (IQR 24-47 seconds) versus 76 seconds (IQR 47-121 seconds) for the navigated and non-navigated approach respectively (p < 0.01 each). Conclusion: This tumor-targeted navigation approach was shown to be user-friendly and allowed for more accurate and efcient targeting of liver tumors in a laparoscopic model. By not requiring a registration nor a calibration process it might represent a simple and efficient alternative to registration based navigation methods.

Item Type:

Conference or Workshop Item (Abstract)

Division/Institute:

04 Faculty of Medicine > Department of Gastro-intestinal, Liver and Lung Disorders (DMLL) > Clinic of Visceral Surgery and Medicine > Visceral Surgery
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Image Guided Therapy
04 Faculty of Medicine > Department of Gastro-intestinal, Liver and Lung Disorders (DMLL) > Clinic of Visceral Surgery and Medicine

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Paolucci, Iwan; Schwalbe, Marius; Prevost, Gian Andrea; Lachenmayer, Anja; Candinas, Daniel; Weber, Stefan and Tinguely, Pascale Marie Pia

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0007-1323

Publisher:

John Wright & Sons

Language:

English

Submitter:

Iwan Paolucci

Date Deposited:

29 Nov 2018 16:08

Last Modified:

29 Nov 2018 16:12

Additional Information:

https://www.ncbi.nlm.nih.gov/pubmed/?term=29766485; Abstracts of the 105th Annual Congress of the Swiss Society of Surgery, held in Basel

URI:

https://boris.unibe.ch/id/eprint/119759

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