T Ohdaira1, H Nagai. 1. Department of General Surgery, Jichi Medical University, Yakushiji 3311-1, Shimotsuki, Tochigi, 329-0498, Japan. ohdairaws@jichi.ac.jp
Abstract
BACKGROUND: Intraoperative tumor localization often is difficult during laparoscopic surgery for early-stage upper gastrointestinal tumors. METHOD: This study enrolled 15 patients undergoing laparoscopic gastrectomy. A magnetic marking clip-detecting system was used to apply a marking clip to the tumor site during preoperative gastroscopy, and to detect a marking magnetic body. RESULTS: In a basic ex vivo study, the mean permeance rate on the gastric wall serosal surface was 0.97 +/- 0.01. Magnetic flux densities required for exploration were 52.6 mT on the gastric wall serosal surface and 312.4 mT 10 mm away from the surface. In a clinical study, the mean distance between the detected tumor site and the clip along the longitudinal axis was 8.3 +/- 3.2 mm. The mean detection time was 5.7 +/- 2.3 min. CONCLUSION: The magnetic marking clip-detecting system may be useful for tumor site detection during laparoscopic gastrectomy.
BACKGROUND: Intraoperative tumor localization often is difficult during laparoscopic surgery for early-stage upper gastrointestinal tumors. METHOD: This study enrolled 15 patients undergoing laparoscopic gastrectomy. A magnetic marking clip-detecting system was used to apply a marking clip to the tumor site during preoperative gastroscopy, and to detect a marking magnetic body. RESULTS: In a basic ex vivo study, the mean permeance rate on the gastric wall serosal surface was 0.97 +/- 0.01. Magnetic flux densities required for exploration were 52.6 mT on the gastric wall serosal surface and 312.4 mT 10 mm away from the surface. In a clinical study, the mean distance between the detected tumor site and the clip along the longitudinal axis was 8.3 +/- 3.2 mm. The mean detection time was 5.7 +/- 2.3 min. CONCLUSION: The magnetic marking clip-detecting system may be useful for tumor site detection during laparoscopic gastrectomy.
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