Objective To analyze the application of nutrition support therapy in patients undergoing laparoscopic radical gastrectomy.

Methods The clinical data of patients undergoing limited-period laparoscopic radical gastrectomy from January 1, 2017 to December 31, 2019 were retrospectively collected and analyzed. The clinical application of nutrition support and treatment during the perioperative period was analyzed.

Results A total of 410 patients were included. The incidence of preoperative nutritional risk and malnutrition were 43.66% (179/410) and 8.05% (33/410), respectively. The perioperative nutrition support and treatment was mainly used after surgery in 265 cases, and only 13 patients were given nutrition support before surgery. Nutrition support was mainly given through parenteral nutrition (PN), with an application rate of 88.30% (234/265). The application rates of postoperative PN support with all in one (AIO) mixed nutrient solution and simple amino acid infusion were 9.40% (22/234) and 90.60% (212/234), respectively. The energy supplied by AIO was (20.02±3.15) kcal·kg^-1·d^-1, the amount of nitrogen was (0.14±0.04) g·kg^-1·d^-1, the ratio of heat to nitrogen was (124.75±45.56)∶1. The energy supply in a single bottle of amino acid infusion was (8.63±2.29) kcal·kg^-1·d^-1, the amount of nitrogen was (0.24±0.14)g·kg^-1·d^-1, and the ratio of heat to nitrogen was (128.49±40.90)∶1. The application rate of postoperative enteral nutrition (EN) mainly through oral nutrition supplement (ONS) was 25.28% (67/265). Among patients with preoperative nutritional risk, those who received nutritional support treatment had a significantly lower postoperative complication rate than those who did not (P < 0.05).

Conclusions The concept of nutrition support therapy has been improved, but the standardization needs to be further improved.