Outcomes of Intra-articular Steroid Injection Via Ultrasound Guidance Versus Fluoroscopic Guidance in the Sacroiliac Joint in Patients With Sacroiliitis

Sacroiliitis is a common cause of low back and buttock pain. Intra-articular steroid injection of the sacroiliac joint can provide pain relief and functional improvement. This randomized controlled trial aims to compare the outcomes of ultrasound-guided versus fluoroscopic-guided sacroiliac joint steroid injections in patients with sacroiliitis. The study will evaluate procedural success, pain reduction, and functional improvement using the Visual Analogue Scale (VAS) and Oswestry Disability Index (ODI) at follow-up intervals.

Inclusion Criteria: * Age 18-70 years * Both sexes * Clinical diagnosis of sacroiliitis Exclusion Criteria: * Prior SI joint injection in the past 12 months * Contraindication to corticosteroid injection (systemic infection, local infection, bleeding diathesis, uncontrolled diabetes with HbA1c \>9%, allergy to contrast or steroid) * Radicular or neurogenic pain attributable to lumbar spine or hip pathology * Pregnancy or breastfeeding * Severe osteoarthritis or fusion of the SI joint on imaging * Systemic rheumatologic disease requiring systemic biologic therapy (unless stable for \>6 months)