Application of sevoflurane inhalation combined with epidural anesthesia in patients with colorectal cancer and its effect on postoperative perceptual function

Effect of sevoflurane inhalation combined with epidural anesthesia on postoperative perceptual function in patients with colorectal cancer (CRC) was investigated. The clinical data of 78 patients undergoing laparoscopic CRC radical surgery in The Second Cancer Hospital of Heilongjiang Province from June 2016 to June 2017 were retrospectively analyzed and divided into 2 groups: Sevoflurane inhalation combined with epidural anesthesia (observation group, n=40); propofol intravenous general anesthesia (control group, n=38). The mean arterial pressure and heart rate before anesthesia (T0), immediate intubation (T1), 30 min after surgery started (T2), end of surgery (T3), 10 min after extubation (T4) were compared between the two groups. The recovery conditions were also compared between the two groups. The cognitive functions were evaluated by mini-mental state scale (MMSE). The mean arterial pressure and heart rate in the observation group were significantly lower than those in the control group at T2, T3 and T4 (P<0.05). The recovery time, extubation time, anal exhaust time, eating time, urinary catheter removal time and hospital stay in the observation group were significantly lower than those in the control group (P<0.05). There was a significant difference in cognitive function between the two groups at different time points (P<0.001). Postoperative cognitive function showed a trend of decreasing first and then increasing; the scores of cognitive function in both groups 1 day after surgery were at trough level, and recovered gradually from 3 days after surgery. The mean arterial pressure and heart rate during the perioperative period are more stable in the elderly patients with sevoflurane inhalation combined with epidural anesthesia; the recovery time is shorter and more rapid, and the recovery time of postoperative cognitive function is also faster. Therefore, it provides a reference for patients undergoing CRC radical surgery to select high-quality and appropriate anesthetic protocols.