2.1. Study design
Local ethics committee approval (SBKEAH-KAEK: 2017/514/118/18) was obtained for this prospective, feasibility, randomized and single-blind study. Our study was designed and conducted in accordance with the ethical principles specified in the Helsinki Declaration. Patients were admitted to the study between 02.01.2018 and 01.07.2018. Written informed consent was obtained from all patients.
ASA I and II patients aged 18-60 years, scheduled for arthroscopic knee surgery (meniscectomy, synovectomy, and ACL repair), were included in the study. Our exclusion criteria were ASA III and above, chronic opioid or steroidal agent use, bleeding-coagulation disorder, diagnosis of neuropsychiatric disease that would affect the perception of pain, and regular use of antipsychotic-antidepressants or gabapentinoid. It was planned to be excluded from the study if the duration of the surgery was <60 minutes or> 180 minutes.