Abstract
Estimated to affect 2–5% of the population, adhesive capsulitis is a common cause of shoulder pain and dysfunction. The objective of this study is to determine if arthrographic injection of the shoulder joint with steroid, local anesthetic and contrast is an effective treatment modality for adhesive capsulitis and whether it is superior to arthrographic injection with local anesthetic and contrast alone.
This is a double-blinded RCT of patients with a diagnosis of adhesive capsulitis who were randomly assigned to receive an image guided arthrographic glenohumeral injection with either triamcinalone (steroid), lidocaine (local anesthetic) and contrast or lidocaine and contrast alone. Outcome measures included active and passive shoulder range of motion (ROM) and functional outcomes assessed using the Shoulder Pain and Disability Index (SPADI), the Constant Score and a Visual Analog Scale for pain. Post-operative evaluation occurred at 3 weeks, 6 weeks and 12 weeks. Descriptive statistics were utilised to summarise patient demographics and other study parameters. One-way ANOVAs compared the VAS, Constant and SPADI scores across the different time points for both study groups. The post hoc Bonferroni correction was used to adjust for multiple comparisons.
There were 37 shoulders injected with follow-up visits at 12 weeks. Twenty shoulders were randomised to receive local plus steroid and 17 shoulders received local anesthetic only. There were 21 females and 14 males with an average age of 54 years (range, 42–70). VAS scores for both patient groups were significantly improved (p<0.05) at all follow-up times. Goniometric testing demonstrated significant improvements in forward flexion and internal rotation at 90 degrees in the local group and only abduction in the local plus steroid group. There were no significant changes in the Constant scores for the local group (p=0.08), however, the Constant scores showed significant improvement for the local plus steroid group (p=0.003) at all follow-up time points. The local group showed significant improvement in their SPADI pain scores at the 12 week follow-up only (p=0.01). There were no significant differences in their SPADI disability scores (p=0.09). The local plus steroid group had significant improvement in SPADI pain and disability scores at all follow-up time points (p=0.001).
The optimal treatment for adhesive capsulitis remains unclear. Our study demonstrated that patients receiving an arthrographic injection of either steroid and local anesthetic or local anesthetic alone had significantly improved post-injection pain scores. However, only the steroid and local anesthetic group demonstrated improved SPADI disability and Constant scores. Thus, we believe that either treatment may be a good option for patients with adhesive capsulitis and can reliably relieve pain, but we would recommend the steroid with local anesthetic over the local anesthetic alone as it may provide improved function.
