Resisted AC Joint Extension Test
Original Editor - Evan Thomas
Lead Editors - Evan Thomas, Rachael Lowe, Kim Jackson, Kai A. Sigel, WikiSysop, 127.0.0.1, Naomi O'Reilly, Wanda van Niekerk and Manisha Shrestha
Purpose[edit | edit source]
Resisted AC Joint Extension Test (or the AC Resisted Extension Test) is used to help identify acromioclavicular joint pathology in both traumatic and non-traumatic/chronic overuse cases,[1] and can be useful in helping differentiate between AC joint and impingement syndromes.[2]
Technique[edit | edit source]
- The patient is seated with the therapist standing behind him/her[3]
- The patient's shoulder is positioned into 90 flexion and internal rotation, with the placed into 90 flexion
- The therapist places his/her hand on the patient's elbow and asks him/her to horizontally abduct the arm against isometric resistance
- A positive test is pain at the AC joint
Evidence[5][edit | edit source]
Sensitivity (%) | 72 |
Specificity (%) | 85 |
Positive Predictive Value (%) | 20 |
Negative Predictive Value (%) | 98 |
Test Item Cluster:
This test can be combined with the Cross Body Adduction Test and O'Brien's Active Compression Test as part of a cluster.
Sensitivity (%) | Specificity (%) | Positive Predictive Value (%) | Negative Predictive Value (%) | |
Positive in 3/3 | 25 | 97 | 31 | 96 |
Positive in 2/3 | 81 | 89 | 28 | 99 |
Positive in 1/3 | 0 | 74 | 17 | 100 |
References[edit | edit source]
- ↑ Miller MD & Thompson SR. DeLee & Drez's Orthopaedic Sports Medicine (4th Ed). Philadelphia, PA: Elsevier.
- ↑ Frontera WR, Silver JK, Rizzo TD (Jr). Essentials of Physical Medicine and Rehabilitation (3rd Ed). Philadelphia, PA: Elsevier.
- ↑ Cook CE & Hegedus EJ. Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd Ed). Boston, MA: Pearson.
- ↑ Resisted AC Joint Extension Test from https://www.youtube.com/watch?v=YHdZQnV0KhU. Last accessed April 1, 2016.
- ↑ Chronopoulos E1, Kim TK, Park HB, Ashenbrenner D, McFarland EG. Diagnostic value of physical tests for isolated chronic acromioclavicular lesions. Am J Sports Med, 2004; 32(3): 655-61.