Comparison of the postoperative analgesic efficacy of ultrasound-guided suprainguinal fascia iliaca block applied with two different concentrations of bupivacaine in patients undergoing hip surgery under spinal anesthesia

Aim: Management of postoperative pain in hip surgeries is important for the quality of recovery. When regional anesthesia techniques are added to the multimodal analgesia plan, they increase the effectiveness of the analgesia plan. Supra-inguinal fascia iliaca block (SIFIB) is a technique that has been reported to be effective in hip surgery but requires the use of high-volume local anesthetics. Our aim in this retrospective study is to investigate the efficacy of local anesthetic in SIFIB when administered at a concentration lower than the conventional concentration.Material and Methods: The files of the patients who underwent hip hemiarthroplasty were planned to be evaluated retrospectively. Patients were grouped according to the bupivacaine concentration used in SIFIB (0.25% vs. 0.20%) and statistically evaluated in terms of morphine requirement, pain scores, and time to first analgesic.Results: There was no significant difference between the groups in terms of NRS score and cumulative morphine consumption at the 3rd, 6th, 12th, 18th, and 24th hours (p>0.05). When compared the first analgesia requirement times, there was no significant difference between Groups (p>0.05).Conclusion: A single shot SIFIB administered at a concentration of 0.20% also has analgesic properties, as do the conventional concentration of SIFIB containing 0.25% bupivacaine.