title: Hand-assisted laparoscopic ultrasound-guided radiofrequency thermal ablation of liver tumors: a technical report.
abstract: Ultrasound-guided radiofrequency thermal ablation has been performed for liver tumors by percutaneous, laparoscopic, or open surgical approaches. Each approach has specific advantages and disadvantages. Herein we describe a new technique for hand-assisted laparoscopic ultrasound-guided radiofrequency thermal ablation of liver tumors. A hand-access device is placed at the right or central portion of the abdomen, in addition to standard trocars. A conventional intraoperative ultrasound probe, with an ultrasound guidance system attached, is inserted into the peritoneal cavity together with the surgeon's hand. After pneumoperitoneum is established, an electrode-cannula for thermal ablation is introduced subcostally or intercostally, and advanced into a liver tumor under direct guidance by intraoperative ultrasound. We have used this technique in eight patients with unresectable liver tumors. Precise guidance of the cannula into tumors was possible. All tumors were well ablated. The postoperative recovery of patients was of shorter duration compared with that of an open surgical approach. A hand-assisted laparoscopic ultrasound-guided method has advantages of both laparoscopic and open surgical approaches for radiofrequency thermal ablation treatment of liver tumors. Accurate cannula insertion is possible with the ultrasound guidance system. The hand-assisted laparoscopic approach can become an additional useful technique, particularly as a valuable alternative to an open surgical method, for performing radiofrequency thermal ablation.
authors.affiliation: Department of Surgery, University of Hawaii at Manoa and Kuakini Medical Center, Honolulu, Hawaii. j.machi@surgedinc.org
authors.forename: Junji
authors.initials: J
authors.lastname: Machi
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Oishi
authors.forename: Allan J
authors.initials: AJ
authors.lastname: Mossing
authors.forename: Nancy L
authors.initials: NL
authors.lastname: Furumoto
authors.forename: Robert H
authors.initials: RH
authors.lastname: Oishi
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000000981:diagnostic imaging / Q000601:surgery*; D017115:Catheter Ablation / Q000295:instrumentation* / Q000379:methods*; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D004867:Equipment Design; D006801:Humans; D007431:Intraoperative Complications / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000601:surgery; D020706:Laparoscopes; D010535:Laparoscopy / Q000379:methods*; D008113:Liver Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary / Q000601:surgery*; D008328:Man-Machine Systems; D009382:Neoplasms, Unknown Primary / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000601:surgery; D011183:Postoperative Complications / Q000000981:diagnostic imaging; D018084:Ultrasonography, Interventional / Q000379:methods*