Related Experiment Video
Updated: Jul 17, 2026
Intraoperative Gastroscopy for Tumor Localization in Laparoscopic Surgery for Gastric Adenocarcinoma
Published on: August 9, 2016
Intraoperative localization of early-stage upper gastrointestinal tumors using a magnetic marking clip-detecting
1Department of General Surgery, Jichi Medical University, Yakushiji 3311-1, Shimotsuki, Tochigi, 329-0498, Japan. ohdairaws@jichi.ac.jp
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.
