Analgesic Effect Of Ultrasound-guided Pudendal Nerve Block After Perianal Surgery

Objective To discuss the analgesic effect of pudendal block guided by ultrasound in patients who have undergone perianal surgery.Methods With the permission of the Medical Ethics Committee of Yanbian University Affiliated Hospital,a total of 80 anorectal patients who were admitted to Yanbian Hospital(Yanbian University Affiliated Hospital)from January 2021 to December 2021.The tested patients ranged in age from 18 to 60 years old,and their body mass index(BMI)fluctuated between 18 and 32 kg/m2.The American Society of Anesthesiologists(ASA)rated them as I-II.All the subjects underwent perianal surgery(such as incision and drainage of perianal abscess,anal fistula resection,complex anal fistula resection,and anal fissure resection).According to the random number table method,the patients who participated in the test were randomly divided into group A and group B,with an average of 40 patients in each group(n=40).Group A:general anesthesia+postoperative patient-controlled intravenous analgesia(PCIA);Group B: general anesthesia +PCIA+ pudendal nerve block(PNB)(20ml of 0.375% ropivacaine).The visual analogue scale(VAS)of patients at rest T1(2h),T2(6h),T3(12h)and T4(24h)were calculated.The total times of patient-controlled analgesia were counted within 24 h after operation.The types and times of adverse reactions(including urinary retention,dizziness,nausea and vomiting,and respiratory depression)were counted.Statistical inpatient satisfaction score.Result(1)In resting state,VAS scores of T1,T2 and T3 in group A were higher than those of group B(P < 0.05).At T4 time point,VAS scores of the two groups had no statistical difference.(P > 0.05).(2)Within 24 hours after operation,the total number of supplementary analgesia in group B was significantly lower than that in group A(P < 0.05).(3)The postoperative complications in group B were much lower than those in group A(P < 0.05).(4)The satisfaction score of patients in group B was markedly greater than that in group A.(P < 0.05).Conclusion Preoperative ultrasound-guided PNB can provide patients with effective postoperative analgesia after perianal surgery,decrease the incidence of adverse reactions greatly,help patients rapidly recover and raise their satisfaction obviously.