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INNOVATIVE MINI INVASIVE TECHNIQUE FOR PROXIMAL HUMERUS FRACTURE FIXATION WITH A LOCKING PLATE – MULTI-CENTES STUDY



Abstract

Plate fixation of the proximal humerus fractures may now be more desirable with the use of a biological approach by limiting surgical insult and allowing accelerated rehabilitation by a solid fixation. To evaluate the safety and efficacy of minimally invasive plating of the proximal humerus using validated disease-specific measures.

During a period of one year, thirty patients were operated with use of the LCP proximal humerus plate (Synthes) through a 3cm lateral deltoid splitting approach and a second 2 cm incision at the deltoid insertion. The axillary nerve was palped and easily protected during insertion. Only two-part (N=22) and three-part impacted valgus type (N=8) were included in this study since they can be reduced indirectly thru this percutaneous technique. The average follow-up was thirteen months (eight to twenty months). All patients had the Constant and DASH evaluations.

All fractures healed within the first six months with no loss of correction. The surgical technique was found easy by all surgeons, the axillary nerve was palpated and protect with this new technique. No infection or avascular necrosis were seen. No axillary nerve deficit was identified. At the last follow-up (average nineteen months, twelve months minimum), the median Constant score was sixty-eight points, with an age ajusted score of seventy-six. The mean DASH score was twenty-seven points. Only age was independently predictive of both the Constant and DASH functional scores. Patients improved until one year of follow up.

Percutaneous insertion of a locking proximal humerus plate is safe and produces gives good early functional and radiologic outcomes. Recuperation from a proximal humerus fracture can be seen until one year.

Correspondence should be addressed to: Cynthia Vezina, Communications Manager, COA, 4150-360 Ste. Catherine St. West, Westmount, QC H3Z 2Y5, Canada