Background and aims Quadratum lumborum block II (QL II) is a method used for pain control after abdominal surgeons. In this study, we aimed to retrospectively investigate the effect of ultrasound-guided QL II on postoperative analgesia and opioid consumption in inguinal hernia repair surgery (IHC) operations under general anesthesia.

Methods This retrospective study was carried out with the files of patients with IHC under general anesthesia in our clinic between 01.01.2018 and 01.04.2018. The patients who were under general anesthesia were divided into two groups. QL used (group Q) and unused (group G) patients. Pain levels measured by postoperative visual analog scale (VAS) and consumption of opioid were recorded according to their file knowledges.

Results Postoperative VAS at 2, 4, 8 and 12 hours in group G was statistically significantly higher. Postoperative total opioid consumption was statistically higher in group G. Postoperative opioid first using time was statistically prolonged in group Q.

Conclusions For result of this retrospectively designed study it was observed that inguinal hernia operations were effective in QL pain control in the first 24 hours postoperatively. Prolonging opioid first using time also reduced opioid consumption.