To investigate the application of ropivacaine with different concentrations in open tension-free inguinal hernia repair and the difference in postoperative analgesia.

From January 2020 to June 2022, 78 patients who underwent inguinal hernia surgery at Suixi County Hospital were prospectively collected for the study. They were divided into a control group and an observation group according to the random number table method, with 39 cases in each group. The patients in both groups were treated with ultrasound-guided iliac inguinal nerve blocks and rectus abdominis sheath blocks. In the control group, 0.2% ropivacaine was applied, and in the observation group, 0.3% ropivacaine was applied. Changes in hemodynamic indexes, the postoperative visual analogue score (VAS), the incidence of adverse reactions to anesthesia, and serum stress indexes (epinephrine, norepinephrine, and cortisol) were compared and observed in the two groups at different time points.

There was no statistically significant difference in mean arterial pressure, heart rate and blood oxygen saturation between the two groups before surgery, at the time of skin incision, and 2 hours after surgery (P>0.05). The VAS scores were lower in the observation group than in the control group at 2h, 6h, and 12h postoperatively (P<0.05). There was no statistically significant difference between the 2 groups at 0.5 h postoperatively (P>0.05). no adverse anesthetic reaction occurred in the 2 groups after surgery. There was no statistically significant difference in serum stress index between the 2 groups at 0.5h preoperatively (P>0.05), and the observation group was lower than the control group at 2h and 8h postoperatively (P<0.05).

In open inguinal hernia repair surgery, ultrasound-guided ilioinguinal nerve block and rectus abdominis sheath block were used, and the application of different concentrations of ropivacaine could better maintain the anesthetic effect during surgery, but 0.3% ropivacaine facilitated early postoperative analgesia, reduced the degree of the human stress response, and did not increase the risk of adverse drug reactions.