Abstract:Objective To explore the success rate and complications of percutaneous puncture of sacral canal guided by B ultrasound. Methods Ninety-seven patients receiving perineal surgery in the Anorectal Department and Department of Urology were randomly divided into observation group (B ultrasound positioning group, 51 cases) and control group (traditional method group, 46 cases). The observation group adopted the linear high-frequency ultrasound probe cross positioning method. The lower part of the longitudinal probe was arranged at the upper part of the sacral hiatus. Using the inner plane technique of the acoustic field, the injection needle was slowly inserted along the lower edge of the ultrasonic probe at a 45 degree angle with the skin. The direction and depth of the puncture were guided and adjusted according to the ultrasound realtime image, until the needle tip was completely located in the sacral lumen. The control group was treated with the traditional method of body surface localization. Results The 1 puncture success rate, the average number of puncture, the average puncture time and the blood vessel injury rate in the observation group were significantly different from those in the control group (p < 0.05). In the observation group, 1 case had failure in 1 puncture, because the operator did not pay attention to avoid venous plexus at the initial implementation of B ultrasound positioning, resulting in vascular injury. Conclusions Ultrasound guided sacral canal anesthesia, not only greatly improves the success rate of puncture, but also saves the operating time and reduces the number of puncture and the complications of vascular injury, and has good clinical application value.
