Resisted AC Joint Extension Test

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Original Editor-Evan Thomas

Lead Editors-Evan Thomas,Rachael Lowe,Kim Jackson,Kai A. Sigel,WikiSysop,127.0.0.1,Naomi O'Reilly,万达van NiekerkandManisha 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[3][edit|edit source]

  1. The patient is seated with the therapist standing behind him/her
  2. The patient's shoulder is positioned into 90 flexion and internal rotation, with the placed into 90 flexion
  3. The therapist places his/her hand on the patient's elbow and asks him/her to horizontally abduct the arm against isometric resistance
  4. A positive test is pain at the AC joint

[4]

Evidence[5][edit|edit source]

Diagnostic Test Properties for the Resisted AC Joint Extension Test
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 andO'Brien's Active Compression Testas part of a cluster.

Diagnostic Value of Combined Physical Tests
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

Resources[edit|edit source]

Recent Related Research (fromPubmed)[edit|edit source]

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References[edit|edit source]

  1. ↑Miller MD & Thompson SR. DeLee & Drez's Orthopaedic Sports Medicine (4th Ed). Philadelphia, PA: Elsevier.
  2. ↑Frontera WR,银JK, Rizzo TD (Jr). Essentials of Physical Medicine and Rehabilitation (3rd Ed). Philadelphia, PA: Elsevier.
  3. ↑Cook CE & Hegedus EJ. Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd Ed). Boston, MA: Pearson.
  4. ↑Physiotutors. Cross Body Adduction Test | Acromioclavicular Joint Pathology. Available from:https://www.youtube.com/watch?v=DKLvt816x6o
  5. ↑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.


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