Abstract:Objective To investigate the effects of esketamine combined with sufentanil on analgesia and hemodynamics after laparoscopic radical resection of colon cancer.Methods A total of 104 patients who underwent laparoscopic radical resection of colon cancer in our hospital from June 2020 to January 2022 were selected and randomly divided into the control group and the study group, with 52 cases in each group. The control group was given sufentanil, and the study group was given esketamine combined with sufentanil for postoperative analgesia. The analgesia-related indicators after surgery were compared between the two groups. The Visual Analogue Scale (VAS) scores, hemodynamic indicators, serum indicators of stress response to pain, and Richards-Campbell Sleep Questionnaire (RCSQ) scores at different time points were compared between the two groups of patients. The incidence of drug-related adverse reactions in the two groups was compared.Results The dosage of sufentanil was lower and the effective use of analgesic pump was less in the study group compared with the control group (P < 0.05). The VAS scores, systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR) and mean arterial pressure (MAP) at T1, T2, T3, T4, T5 in the control group were compared with those in the study group via repeated measures ANOVA. The results revealed that VAS scores, SBP, DBP, HR and MAP were different among the time points (F = 8.257, 6.814, 8.679, 7.035 and 6.548, all P = 0.000) and between the two groups (F = 8.009, 7.512, 9.184, 8.135 and 7.006, all P = 0.000), and that the change trends of VAS scores, SBP, DBP, HR and MAP were also different between the two groups (F = 8.009, 7.512, 9.184, 8.135 and 7.006, all P = 0.000). The levels of ACTH and Cor at T1, T3 and T5 were compared between the control group and the study group. The results of repeated measures ANOVA showed that there were differences in levels of ACTH and Cor at different times (F = 9.186 and 8.256, all P = 0.000) and between the two groups (F = 8.743 and 7.654, all P = 0.000), and that the change trends of levels of ACTH and Cor were different between the study group and the control group (F = 7.183 and 7.886, all P = 0.000). The RCSQ scores at 1 day before operation, 1 day after operation, and 2 days after operation in the control group and the study group were compared via repeated measures ANOVA, and the results demonstrated that the RCSQ scores were different among the time points (F = 8.415, P = 0.000) and between the control group and the study group (F= 7.302, P = 0.000), and that the change trends of RCSQ scores were different between the two groups (F = 6.854, P = 0.000). There was no significant difference in the overall incidence of adverse drug reactions between the two groups (P >0.05).Conclusions Esketamine combined with sufentanil for laparoscopic radical colon cancer surgery may enhance postoperative analgesia, stabilize hemodynamic indicators, inhibit postoperative stress responses, and improve sleep quality, with few safety concerns.