Adhesive capsulitis is a common and disabling shoulder disorder characterized by progressive pain and restricted active and passive range of motion, leading to significant limitations in daily activities and reduced quality of life. Corticosteroid injections are widely used to relieve pain and improve shoulder function; however, the optimal injection site remains a matter of debate. While ultrasound-guided intra-articular injections are considered a standard treatment, ultrasound-guided pericapsular injections have recently emerged as a potential alternative by targeting the inflamed capsular tissues directly.
The primary objective of this study is to compare the clinical effectiveness of ultrasound-guided pericapsular corticosteroid injection with ultrasound-guided intra-articular corticosteroid injection in patients diagnosed with adhesive capsulitis. The study aims to determine whether one injection technique provides superior improvements in pain, shoulder range of motion, functional status, and patient-reported outcomes.