Abstract
Pain is the hallmark symptom of OA. IACI can be considered as an adjunct to core treatment for the relief of moderate to severe pain in people with knee OA. Recent study reported successful pain relief by ablation of the three branches of the Genicular nerve [superior lateral (SL), superior medial (SM), and inferior medial (IM). In the ultrasound-guided GNB technique, these three nerves were selected for the same reasons. Previous studies have identified OKS thresholds to aid the clinician in presenting the expected outcome of surgery in a meaningful way to the patient (OKS provides a means of comparing preoperative and post-operative health status).This cross-sectional, respondents were filled OKS questionaire, and they were self-reported a diagnosis of OA at least one knee by a physician, reported more than 3 months of persistent OA pain. These data were collected at the first post-injection (IACI &GNB) and at 4 week followup visit. The analysis was performed by Independent T-test in SPSS version 22. In IACI group the mean of initial OKS was 37,81±6,87 compare to 34,94±6.14 in GNB group. After 4 weeks, it increased to 42±7.14 and 42,84±7,67 respectively. A total of 82 patients were randomized, with patients receiving an injection, 32 receiving IAIC injection and 50 receiving GNB injection. From Independent Samples T Test, GNB injection demonstrated significantly greater pain reductions and greater percent OKS score improvement than IACI up to 4 weeks postinjection. Comparing two methods, there were significant difference between two groups based on OKS: p=0.000