Intraoperative localization of early-stage upper gastrointestinal tumors using a magnetic marking clip-detecting system

• Published in: Surgical endoscopy Vol. 21; no. 5; pp. 810 - 815
• Main Authors: OHDAIRA, T, NAGAI, H
• Format: Journal Article
• Language: English
• Published: New York, NY Springer 01.05.2007; Springer Nature B.V
• Subjects: Aged; Biological and medical sciences; Data processing; Digestive system. Abdomen; Endoscopy; Female; Gastrectomy; Gastrointestinal Neoplasms - diagnosis; Gastrointestinal Neoplasms - surgery; Gastrointestinal surgery; Humans; Intraoperative Care; Investigative techniques, diagnostic techniques (general aspects); Laparoscopy; Large intestine; LCDs; Liquid crystal displays; Localization; Magnetics; Magnetism; Male; Medical sciences; Middle Aged; Sensors; Stomach; Stomach, duodenum, intestine, rectum, anus; Surgeons; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases; Surgery of the digestive system; Surgical Instruments; Tumors; Upper Gastrointestinal Tract; United States > US; Japan; Clip; Treatment; Surgery; Detector ¯ Laparoscopic gastrectomy ¯ Magnetic marking ¯ Magnetometer ¯ Marking clip; Intraoperative; Early stage; Tumor; Laparoscopy; Endoscopy; Gastrectomy; Gastrointestinal; Localization
• ISSN: 0930-2794; 1432-2218
• DOI: 10.1007/s00464-006-9037-3

Intraoperative tumor localization often is difficult during laparoscopic surgery for early-stage upper gastrointestinal tumors. 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. 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. The magnetic marking clip-detecting system may be useful for tumor site detection during laparoscopic gastrectomy.