The Influence Of Ultrasound-guided Stellate Ganglion Block On Early Postoperative Gastrointestinal Function In Patients With Colorectal Cancer

Objective:The aim of this study is to discuss the effect of ultrasound-guided stellate ganglion block on early postoperative gastrointestinal function in patients with colorectal cancer.Methods:A total of 60 patients were selected in the study who need elective surgery of colorectal cancer.The patients were 45-65 years old and average age of them were（57.95±4.18）years old,the American Society of Anesthesiologists（ASA）classification were I～II.The patients were randomly assigned into two groups and each group including 30 patients:general anesthesia group（control group,C group）and conventional anesthesia with stellate ganglion block group（stellate ganglion block group,S group）.Patints in the control group received conventional anesthesia.For the SGB group,patients received ultrasound-guided stellate ganglion block on the right after the induction of conventional anesthesia,and received0.2%ropivacaine 4ml.Changes of heart rate（HR）and mean arterial pressure（MAP）we recorded at the following time points:when patients enter the operating room（T₁）,1 minute after skin incision（T₂）,end of surgery（T₃）,and extubation（T₄）;the recovery time of postoperative bowel sound and the time of anal exhaust in the two groups;the incidence of postoperative abdominal distension and postoperative nausea and vomiting at the following time points:1h after surgery（T₁）,6h after surgery（T₂）,12h after surgery（T₃）and 24h after surgery（T₄）.Results:（1）Hemodynamic indicators:At T₂,T₃and T₄time points,HR and MAP in group S were significantly lower than those in group C,P<0.05;（2）The recovery time of bowel sound:in the SGB group,bowel sound recovery time[（39.20±3.04）h]was earlier than the control group[（56.40±2.99）h],P<0.05;（3）The time of anal exhaust:in the SGB group,anal exhaust time[（59.70±2.13）h]was earlier than the control group[（81.58±2.20）h],P<0.05;（4）The incidence of postoperative abdominal distension:the incidence of postoperative abdominal distension was lower among patients in the SGB group（6.7%）than the control group（30%）,P<0.05;（5）The comparison of postoperative nausea and vomiting:the incidence of group S was lower than that of group C at each time point,P<0.05.Conclusion:Ultrasound-guided stellate ganglion block can maintain circulation stability and be helpful for the recovery of postoperative gastrointestinal function,it also can decrease the incidence of postoperative nausea and vomiting,and enhance the quality of life of patients significantely.