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Assess for tendinosis, partial or complete tear of rotator cuff

Performing the Test

  1. Have patient abduct their arm to 90°, angled forward by 30°(in line with plane of scapula) and then internally rotate with thumb pointing to the floor
  2. Supraspinatus strength evaluated against examiner-applied inferiorly
  3. Positive test: indicated by weakness in empty can position
    • Also note pain for impingement, tendinosis
    • Distinguish weakness secondary to pain from true weakness
    • Partial tear
      • Sensitivity: 45%; specificity: 89%
      • LR+ = 4.1; LR- = 0.6
    • Complete tear
      • Sensitivity: 76%; specificity: 89%
      • LR+ = 6.8; LR- = 0.3

References

  1. Baxter S, ed., McScheffrey G, ed. Toronto Notes: Comprehensive Medical Reference & Review for MCCQE 1 & USMLE 2. 26th ed. Toronto: Toronto Notes for Medical Students Inc; 2010.
  2. Essential Evidence Plus. http://www.essentialevidenceplus.com. 2011. Accessed February 2011.
  3. Hurley K. OSCE and Clinical Skills Handbook. Halifax: Elsevier Canada; 2005.