Objective:To evaluate the relationship between the neutrophil-to-lymphocyte ratio (NLR) during the perioperative period and early postoperative recurrence in patients with advanced gastric cancer.Methods:In this prospective study, 188 American Society of Anesthesiologists Physical Status classification Ⅰ or Ⅱ patients, aged 18-75 yr, with a body mass index of 20-30 kg/m 2, with radiological staging of T 2-4N xM 0, underwent elective gastric cancer radical surgery under general anesthesia at the Fourth Hospital of Hebei Medical University from January 2018 to April 2022, were selected. The NLR was measured at 1 day before operation and postoperative days 1, 3 and 5. The difference between postoperative and preoperative NLR (ΔNLR) was calculated. Based on the presence or absence of tumor recurrence and/or metastasis within 2 yr after surgery, the patients were divided into recurrence group and non-recurrence group. The Cox proportional hazards regression model was employed to evaluate the early postoperative recurrence and perioperative NLR in patients with advanced gastric cancer. Results:A total of 171 patients ultimately completed the follow-up. There were 77 cases in recurrence group and 94 in non-recurrence group. Compared to non-recurrence group, NLR and ΔNLR were significantly increased on the 5th day after operation in recurrence group ( P<0.05). The elevated NLR and ΔNLR at postoperative day 5 were independent risk factors for recurrence within 2 yr in patients with advanced gastric cancer ( HR=1.026, P<0.05). Conclusions:NLR may not be associated with the risk of early postoperative recurrence in the patients with advanced gastric cancer, and further evaluation with large-scale studies is needed.

Objective:To evaluate the relationship between the neutrophil-to-lymphocyte ratio (NLR) during the perioperative period and early postoperative recurrence in patients with advanced gastric cancer.Methods:In this prospective study, 188 American Society of Anesthesiologists Physical Status classification Ⅰ or Ⅱ patients, aged 18-75 yr, with a body mass index of 20-30 kg/m 2, with radiological staging of T 2-4N xM 0, underwent elective gastric cancer radical surgery under general anesthesia at the Fourth Hospital of Hebei Medical University from January 2018 to April 2022, were selected. The NLR was measured at 1 day before operation and postoperative days 1, 3 and 5. The difference between postoperative and preoperative NLR (ΔNLR) was calculated. Based on the presence or absence of tumor recurrence and/or metastasis within 2 yr after surgery, the patients were divided into recurrence group and non-recurrence group. The Cox proportional hazards regression model was employed to evaluate the early postoperative recurrence and perioperative NLR in patients with advanced gastric cancer. Results:A total of 171 patients ultimately completed the follow-up. There were 77 cases in recurrence group and 94 in non-recurrence group. Compared to non-recurrence group, NLR and ΔNLR were significantly increased on the 5th day after operation in recurrence group ( P<0.05). The elevated NLR and ΔNLR at postoperative day 5 were independent risk factors for recurrence within 2 yr in patients with advanced gastric cancer ( HR=1.026, P<0.05). Conclusions:NLR may not be associated with the risk of early postoperative recurrence in the patients with advanced gastric cancer, and further evaluation with large-scale studies is needed.

Objective To evaluate the accuracy of stroke volume variation (SVV) in monitoring the changes in blood volume during laparoscopic surgery.Methods Forty ASA physical status Ⅰ or Ⅱ patients of both sexes,aged 40-64 yr,with body mass index ranged from 20 to 25 kg/m2,scheduled for elective laparoscopic surgery under general anesthesia,were studied.After induction of general anesthesia,baseline registrations of variables were obtained.After establishing pneumoperitoneum,6％ hydroxyethyl starch (HES 130/0.4) 500 ml was infused over 30 min.Before pneumoperitoneum (T1),at 5 min after pneumoperitoneum (T2),immediately before volume expansion (T3) and at 3 min after volume expansion (T4),cardiac output (CO),cardiac index (CI),SV,stroke volume index (SVI) and SVV were monitored and recorded.The changing rate of CI (△CI) was calculated.The criterion for effective volume expansion was △CI ≥ 15％.The ROC curve for SVV in determining the volume expansion responsiveness was plotted,and the diagnostic threshold was determined.The area under the curve and 95％ confidence interval were calculated.Results SVV was significantly lower at T2 than at T1.CO,CI,SV and SVI were significantly higher,and SVV was lower at T4 than at T3.The results of ROC curve analysis showed that a 9.2％ SVV threshold discriminated between responders and non-responders with a sensitivity of 61％ and a specificity of 50％,and the area under the curve (95％ confidence interval) was 0.567 (0.378-0.757).Conclusion SVV is not a suitable index in monitoring the changes in blood volume during laparoscopic surgery.