3. Results
A total of 68 patients scheduled for arthroscopic knee surgery were evaluated. 4 patients refused to participate in the study, 3 patients were excluded due to antipsychotic use and 1 patient was excluded because of possible tramadol allergy history. Descriptive data such as age, gender, ASA class, body mass index, surgery type and duration and evaluations between groups are given in TABLE 1. There was no significant difference between the groups in terms of the distribution of descriptive data (p> 0.05).
All operations were completed uneventfully and there were no recorded postoperative complications. One time arterial puncture occurred during the block procedures, the procedure was continued and the case was included in the study. No complications such as quadriceps weakness, intramuscular hematoma, LAST etc. reported in the postoperative period were observed.
When the groups were compared in terms of fentanyl requirements in the recovery room, fentanyl requirement was observed in 7 patients in the control group, while fentanyl was required in 2 and 1 patients in the ACB-0.25 and ACB-0.16 groups, respectively, and the difference between the groups was statistically significant (p <0.05). There was no difference between the groups in terms of rescue analgesic requirements in the first 12 hours and the second 12 hours (p> 0.05).
However, when the groups were compared, a statistical difference was found in terms of the tramadol requirements of the patients in the first 12 hours, the second 12 hours, and the first 24 hours (p <0.05). The use of tramadol in both block groups was lower than the control group in all time periods (p <0.01), and there was no statistically significant difference between the block groups (p> 0.05). Analgesic requirements for the first 24 hours are shown in Table 2, and tramadol requirements for 24 hours are shown in figure 2.
When the average pain scores of the groups were compared, a difference was determined between the groups at 30th minute, 1st hour, 2nd hour and 3rd hour (p <0.001), while there was no difference at 6th, 12th and 24th hours. In the intergroup evaluation, it was determined that the pain score in the control group at 30th minute, 1st hour, 2nd hour and 3rd hour was higher than the block groups (p <0.001), and there was no difference between the block groups in these times (p> 0.05) (Table 3) .