Evaluation of ultrasound‐guided adductor canal block with two different concentration of bupivacaine in arthroscopic knee surgery: A feasibility study

Study Objective The application of regional anaesthesia techniques as a component of multimodal analgesia in knee arthroscopic surgeries increases the quality of postoperative analgesia. Adductor canal block (ACB) is an effective "motor sparing" analgesia technique used in knee surgeries. This study aimed to evaluate the efficacy of ACB using two different concentrations of local anaesthetic in terms of analgesic requirements and pain density in patients undergoing knee arthroscopy. Design Prospective, randomised, controlled. Setting Tertiary hospital. Patients A total of 60 patients (ASA I‐II) were evaluated in three groups, with 20 patients in each group. Interventions Standardised postoperative analgesia was performed in all groups. In addition, ultrasound‐guided ACB (same volume/two different concentrations of bupivacaine: 0.25% vs 0.16%) was applied to the experimental groups. Measurements Tramadol consumption, rescue analgesic requirement and Numeric Rating Scores (NRS). Main Results Tramadol requirement in the first 24 hours was significantly higher in the control group (209.5 ± 23.27 mg) (P