Randomized Controlled Trial on Effect of Lymph Node Mapping by Indocyanine Green Via Submucosal or Subserosal Injection

After preoperative exploration, the indocyanine green powder (Dandong Yichuang Pharmaceutical Co) is dissolved in 0.5 mg/ml of sterile water and the prepared solution (1.5 ml for each point) is injected along the subserosal of the stomach at 6 specific points along the lesser and greater curvature of the stomach.

One day before surgery, 1.25 mg/ml indocyanine green (Dandong Yichuang Pharmaceutical Co) was prepared in sterile water and 0.5 ml of the solution was injected into the submucosal layer at 4 quadrants around the primary tumor, amounting to 2.5 mg of indocyanine green.