https://www.selleckchem.com/products/jdq443.html STUDY OBJECTIVE Chronic postsurgical pain (CPSP), i.e. pain persisting >3 months, may appear after any type of surgery. There is a paucity of literature addressing CPSP development after hip fracture repair and the impact of any analgesic intervention on the development of CPSP in patients after hip fracture surgery. This study is the first aiming to examine the impact of ultrasound-guided fascia iliaca compartment block (USG FICB) on the development of CPSP after hip fracture repair. DESIGN Prospective randomized study. SETTING Operating room. PATIENTS 182 patients scheduled for hip fracture surgery. INTERVENTIONS Patients were randomized to receive a USG FICB (FICB group) or a sham saline injection (sham FICB group), twenty minutes before positioning for spinal anesthesia. MEASUREMENTS The hip - related characteristic pain intensity (CPI) at 3- months post-surgery was the primary outcome measure. Presence and severity of hip-related pain at 3- and 6-months post-surgery, numeric rating pain scale (NRS) scores at 6, 24, 36, 48 postoperative hours, total 24-hour tramadol PCA administration and timing of the first tramadol dose, were documented as well. MAIN RESULTS FICB group presented with lower CPI scores 3- months postoperatively (p less then 0.01), as well as lower percentage of patients with high-grade CPSP, 3 and 6 months postoperatively (p less then 0.001). FICB group also showed significantly lower NRS scores in all instances, lower total 24 - hour tramadol consumption and higher mean time to first tramadol dose (p less then 0.05). The overall sample of 182 patients reported a considerably high incidence of hip -related CPSP (60% at 3 months, 45% at 6 months). CONCLUSIONS USG FICB in the perioperative setting may reduce the incidence, intensity and severity of CPSP at 3 and 6 months after hip fracture surgery, providing safe and effective postoperative analgesia. It is of great significance to protect workers f