Ac Joint Normal Distance

Variation exists but with clinical suspicion any measurement 8mm is concerning for injury comparison to normal contralateral side also useful.

Ac joint normal distance. Right and left should differ by 5 mm. A normal cc distance is between 11 13 mm and there should be no greater than 5 mm difference between the left and right sides 1. Coracoclavicular distance usually 11 13 mm. Acromiohumeral interval is a useful and reliable measurement on ap shoulder radiographs and when narrowed is indicative of rotator cuff tear or tendinopathy.

Ac joint normal width of ac joint in adults is 1 3mm. Normal radiographic measurements of the shoulder are important in evaluation of the osseous relationships in plain film radiography. 50 difference in size between the two shoulders is considered significant. Displacement measured from superior border of the coracoid process to the inferior border of the clavicle.

The acromioclavicular ac joint radiographic series is used to evaluate the acromioclavicular joint and the distal clavicle. It is relevant for the determination of the rockwood type of ac joint injury. 5 8 mm narrower in the elderly. Features of acromioclavicular joint injury include 6.

Inferior plane of the distal clavicle should be on same plane as inferior border of. Normal cc joint distance 10 13mm. Direct blows to the shoulder region. By age 60 width is often less than 1mm.

Plain radiograph true ap shoulder r. Ac radiographs are performed for a variety of indications including. Shoulder radiograph an approach normal radiographic measurements of the shoulder. Normal measurements do not rule out pathology and must be considered in the context of other findings and the clinical presentation.

Petersson cj redlund johnell i. May be the only finding in type i injuries. Cc joint normal distance is 11 13mm. Ac joint space is usually 5mm.

5 8 mm narrower in the elderly greater than 2 4 mm asymmetry compared to radiographs of the contralateral side increased coracoclavicular distance. The ac joint is surrounded on all sides by thin capsular ligaments that are important for joint stability the ac capsular ligaments insert into the clavicle a mean of 3 5 mm from the articular surface with a width ranging from 2 2 2 9 mm. Comparison to opposite cc joint space is more important increase in cc distance of 25 50 indicates complete cc ligament disruption. Measurement the shortest distance is measured.

Radiographic joint space in normal acromioclavicular joints. Children and adolescents have a slightly wider joint space. Widening of the acromioclavicular joint normal. Resection of 7 5 mm or.