Research methods
fracture, nerve block
Internal fixation surgery was used on all the kids in both groups. For the sake of comparison, basic general anesthesia was used on the control group. The patients were informed to fast and drink no more than 6 h before operation, and received intravenous infusion of 0.01 mg/kg atropine injection (Jiangsu Lianshui Pharmaceutical Co., Ltd., NMPN H32020166) and electrolyte 30 min before operation. After that, the children were anesthetized and induced with propofol (Jiangsu Haici Biology Pharmacy Co., Ltd., Yangzijiang Pharmaceutical Group, NMPN H20073642) at 2.0–4.0 mg/kg, sufentanil (Yichang Renfu Pharmacy Co., Ltd., NMPN H20050580) at 0.1–0.2 μ g/kg and vecuronium (Zhejiang Xianju Pharmaceutical Co., Ltd., NMPN H19991172) at 0.08 mg/kg. Sufentanil 8–15 mg/(kg*h) and propofol 5–8 mg/(kg*h) were continuously infused after anesthesia to maintain the BIS at 40–60, and these doses were modified in accordance with the degree of anesthesia. The medication was not given 5 min before surgery. After the consciousness was restored, the airway tube was removed and an appropriate amount of analgesic drugs were given postoperatively.
Based on the experiences of the control group, patients in the study group were given brachial plexus block treatment with anesthesia. The children were instructed to take the supine position before operation, and the fracture site and brachial plexus slave position were detected using Doppler ultrasound instrument. The needle was inserted at 0.5 cm around the target nerve positioned by the probe under ultrasound guidance, and the angle, depth and direction of insertion were adjusted under the guidance of ultrasound images. When there was no blood return by back pumping, 0.5 mL/kg 0.375% ropivacaine hydrochloride (Guangdong CR Shunfeng Pharmaceutical Co., Ltd., NMPN H20050325) was injected for nerve block. After the block, the children were given the same dose of anesthetics. The anesthesia maintenance and listening time were consistent with those in the control group.