To compare the analgesic effects of lumbar quadratus block anesthesia and local infiltration anesthesia on patients undergoing inguinal hernia surgery during and after anesthesia.

Forty male patients undergoing inguinal hernia repair in West China Hospital from October 2017 to February 2018 were randomly divided into two groups. 20 patients in group A with lumbar quadratus block who were anesthetized by anesthesiologist under?the?guidance?of?ultrasonic and 20 patients in group B with traditional local infiltration anesthesia by the surgeon. We recorded the average waiting time from the completion of anesthesia to the beginning of the operation, the operation time, the total operation time (including the operation time into anesthesia, the waiting time after anesthesia and the operation time alone); the patients were scored by visual analogue score (VAS) at the beginning of the operation, the VAS score at the end of the operation, the maximum pain score during the operation, and the pain score 6 hours after the operation.

In group A, the average anesthesia operation time was 7.1 minutes, and the average waiting time from the completion of anesthesia to the beginning of operation was 23.8 minutes. The average total operation time for group A was 62.8 minutes. The average VAS score was 2.3 at the beginning of the operation and 0.8 at the end of the operation. The average maximum intraoperative pain score was 2.8, and the average 6-hour post-operation pain score was 1.5. In group B, the average time of anesthesia operation was 1.8 minutes, the average waiting time from the completion of anesthesia to the beginning of operation was 0.4 minutes, the average total operation time was 37.9 minutes, the average VAS score at the beginning of operation was about 0.2 points, and the average VAS score at the end was about 0.1 points. The maximum intraoperative pain score averaged about 1.3 points, and the pain score averaged 4.1 points at 6 hours after operation, there was a significant difference between the two groups (P<0.05). The average operation time of group A was 32.8 minutes, while that of group B was 35.8 minutes, there was no significant difference between the two groups (P>0.05).

Traditional local infiltration anesthesia has a short waiting time and fewer complications. Additional anesthetics are needed at any time during the operation, which is related to the anesthesia skills of the surgeon and the proficiency of the operation. Postoperative analgesic effect of lumbar quadratus block anesthesia is obviously better than that of local infiltration anesthesia, but intraoperative analgesic effect is slightly worse than that of local infiltration anesthesia, and anesthesiologists need a certain learning curve, so the specific choice of anesthesia methods should be based on the technical level of their respective medical units and the proficiency of the surgeon.