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AC Separations
1. AC Separations
Alan M. Hirahara, M.D., FRCS(C)
Board Certified in Orthopaedic Surgery & Orthopaedic Sports Medicine
Specializing in arthroscopic shoulder surgery
Medical Director Team Physician Consultant
Sacramento State Athletics Sacramento River Cats Oakland A’s
MiLB - AAA
3. AC Separations Have a High
Incidence of Associated Intra-
Articular Pathology
Alan M Hirahara, MD, FRCSC
4. Study
• Retrospective study design
• 18 patients with an AC separation requiring repair
– 11/05 – 3/12
• Results
– 61% of patients had some form of intra-articular pathology
– 22% had no intra-articular pathology
– 17% were never investigated so were unknown
6. Discussion
• Tischer & Imhoff, AJSM 37(1), 2009, 136-9.
– High incidence of associated injuries with type
III–V AC separations (77 patients in 5 yrs)
• 14% SLAP
• 4% RCT
• 5% fracture
7. Conclusion
• High association of intra-articular pathology
with AC separations
• MRA or diagnostic arthroscopy is
recommended prior to AC repair or
reconstruction to avoid