Relative Ratio of Coracohumeral Distance is Greater in Patients with Subcoracoid Impingement (SCI)
Journal Title: Radiology – Open Journal - Year 2017, Vol 2, Issue 2
Abstract
Purpose: No standard imaging diagnostic criteria have yet been established for subcoracoid impingement (SCI) of the shoulder. The purpose of this study was to evaluate coracohumeral distance (CHD) in patients with or without SCI with the hypothesis that patients with SCI would have narrower CHD. Materials and Methods: One hundred fifty patients with subacromial impingement (SAI) were evaluated. The subjects with subcoracoid impingement which was affirmed clinically and confirmed by ultrasound guided subcoracoid injection (n=39) was compared with patients with SAI only (n=111). Patients with stiffness and rotator cuff tear were excluded. Absolute CHD was measured on magnetic resonance imaging (MRI) axial images and on ultrasound with the humerus in neutral position and internal rotation. Also relative ratio of distance difference (RRDD) defined as the difference of CHD in neutral position and internal rotation compared with absolute CHD in neutral on ultrasound was also measured. Results: The distance measured in neutral position was similar between ultrasound (US) imaging and MRI (p>0.05) and both measurements did not have significant difference between the two groups (p>0.05). On ultrasound, there was no significant difference in CHD in neutral and the internal rotation position between the two groups. However, RRDD value was significantly greater in SCI group (p<0.05). Conclusion: Although, the SCI group and the SAI group were not matched for age, sex, or BMI, no significant difference in CHD was seen between the SCI and SAI groups. RRDD value was greater in SCI group suggesting that individualized CHD in internal rotation should be taken into account when assessing patients with subcoracoid impingement.
Authors and Affiliations
Suk-Hwan Jang
Keywords
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- EP ID EP554377
- DOI 10.17140/ROJ-2-115
- Views 119
- Downloads 0
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