Acromiohumeral interval
Updates to Synonym Attributes
Title
was added:
Subacromial space
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Synonym.
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.
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Updates to Article Attributes
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Acromiohumeral interval is a useful and reliable measurement on AP shoulder radiographs and when narrowed is indicative of subacromial impingement +/- rotator cuff tear or tendinopathy.
Measurement
The shortest distance is measured.
Plain radiograph
- true AP shoulder radiograph
- measure from the cortical bone at the inferior aspect of the acromion to the humeral head 3
MRI
- can also be performed on coronal and sagittal oblique T1 MR images
- inferior aspect of the acromion (marked by black line directly above the humeral head) directly inferiorly to the centre of the subchondral cortex of the humeral head 3
Interpretation
Measurements of the acromiohumeral interval in the following intervals are suggestive of pathology 1,2:
- >12 mm: shoulder dislocation; inferior subluxation (e.g. from joint effusion)
- 9-10 mm (range 8-12 mm): normal
- 6-7 mm: thinning of supraspinatus tendon
- <6 mm: supraspinatus tear
See also
-<p><strong>Acromiohumeral interval</strong> is a useful and reliable measurement on AP shoulder radiographs and when narrowed is indicative of <a title="Subacromial impingement" href="/articles/subacromial-impingement">subacromial impingement</a> +/- <a href="/articles/rotator-cuff-tear">rotator cuff tear</a> or tendinopathy. </p><h4>Measurement</h4><p>The shortest distance is measured. </p><h5>Plain radiograph</h5><ul>- +<p><strong>Acromiohumeral interval</strong> is a useful and reliable measurement on AP shoulder radiographs and when narrowed is indicative of <a href="/articles/subacromial-impingement">subacromial impingement</a> +/- <a href="/articles/rotator-cuff-tear">rotator cuff tear</a> or tendinopathy. </p><h4>Measurement</h4><p>The shortest distance is measured. </p><h5>Plain radiograph</h5><ul>
References changed:
- 5. Umer M, Qadir I, Azam M. Subacromial Impingement Syndrome. Orthop Rev (Pavia). 2012;4(2):e18. <a href="https://doi.org/10.4081/or.2012.e18">doi:10.4081/or.2012.e18</a>
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