Crank Test
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Purpose[edit | edit source]
This test also called labral crank test or compression rotation test is used to identify glenoid labral tears and assess an unstable superior labral anterior posterior (SLAP) lesions. [1]
Technique[edit | edit source]
Patient is sitting upright with the arm flexed to 90°, the examiner stands adjacent to the affected shoulde forearmr holding the flexed elbow or forearm. [1] Joint load is applied along the axis of the humerus with one hand while the other hand performs humeral rotation while the shoulder is being elevated in the scapular plane. The test can be repeated in supine. A positive test is indicated during the maneuver (usually during external rotation) if there is reproduction of symptoms (usually pain) with or without a click. [3]
Evidence[edit | edit source]
| First author |
Sensitivity (95% CI) |
Specificity (95% CI) |
+LR (95% CI) |
-LR (95% CI) |
Accuracy (%) |
| Guanche 2003 | 0.4 | 0.73 | 1.481 | 0.821 | |
| Liu 1996 | 0.906 (0.750–0.980) | 0.933 (0.779–0.992) | 13.594 (3.547–52.099) | 0.100 (0.034–0.296) | 91.9 |
| Mimori 1999 | 0.833 (0.516–0.979) | 1.000 (0.292–1.000) | 6.462 (0.477–87.549) | 0.220 (0.068–0.711) | 86.6 |
| Myers 2005 | 0.346 | 0.7 | Not calculated | Not calculated | 44.4 |
| Nakagawa 2005 | 0.58 | 0.72 | Not calculated | Not calculated | 66 |
| Parentis 2006 | 0.087 | 0.826 | Not calculated | Not calculated | |
| Stetson and Templin 2002 | 0.462 (0.266–0.666) | 0.564 (0.396–0.722) | 1.059 (0.612–1.831) | 0.955 (0.608–1.497) | 33.8 |
Resources[edit | edit source]
- Guanche CA, Jones DC. Clinical testing for tears of the glenoid labrum. Arthroscopy. 2003;19:517-523.
- Liu SH, Henry MH, Nuccion S, Shapiro MS, Dorey F. Diagnosis of glenoid labral tears: a comparison between magnetic resonance imaging and clinical examinations. Am J Sports Med. 1996;24(2):149–154.
References[edit | edit source]
- ↑ 1.0 1.1 Hattam P, Smeatham A. Special Tests in Musculoskeletal Examination. Edinburgh: Churchill Livingstone, 2010.
- ↑ Clinically Relevant Technologies, http://www.youtube.com/watch?v=3CLvoC21hTo[last accessed 22/03/13]
- ↑ 3.0 3.1 Munro W, Healy R. The validity and accuracy of clinical tests used to detect labral pathology of the shoulder-a systematic review. Manual Therapy 2009; 14(2):119-30.
