2.2. Study and Control Groups
In this study, three groups, two experimental and one control group, were planned and randomization was done by closed envelope method. Standard perioperative and postoperative analgesia regimen was applied to the patients in the control group. In addition to this regimen in the experimental groups, unilateral ACB was applied before the induction of general anesthesia.
The experimental groups were named as ACB-0.25 and ACB-0.16 according to the local anesthetic concentration applied. The reason why these concentrations were chosen will be explained in detail in the discussion section. The design and process of the study are specified in the CONSORT diagram (Figure 1).