Displaced 3- and 4-part proximal humeral fractures：Evaluation and management with an intramedullary nail within 48 h, in the emergency department

摘要

Objective: To investigate if a locking intramedullary nail could be useful in the treatment of fractures of the humeral head in 3 and 4-fragments operated within 48 h from the trauma. Methods: During the period of February 2011–May 2013, we performed 21 cases of humeral fractures treated with the Polarus intramedullary nail (Acumed). We considered parameters such as age, sex, time of radiological healing and functional outcome, which were assessed by Constant shoulder score, University of California at Los Angeles shoulder score, Oxford shoulder score and Dash score. The study was designed as a prospective cohort study. Results: Clinical and radiographic follow-up of patients was performed at 1, 2, 3, 6, 12, and 24 months after surgery. Evidence of radiographic bone healing occurred at an average of 2.42 months post-surgery (range:1–6 months, median 2). There were no cases of avascular necrosis of the humeral head or failure of the synthesis. The functional outcome was excellent in 6 out of 21 cases (Constant score>86%);good in 11 out of 21 cases (Constant score 71–85);satisfactory in 3 out of 21 cases (Constant score 56–70);only in one case we recorded poor outcome (Constant score=55). Conclusions: The nail utilized is provided with locking and multiplanar proximal screws and could be applied through a mini-invasive anterolateral approach. This enables the reduction of the fracture fragments, while preserving vascularization of the scapulo-humeral joint. Our results confirm that the indication of endomedullary nail could be extended to the treatment of complex proximal humeral fractures with 3 and 4 fragments (level of evidence IV, according to the Oxford Centre for Evidence Based Medicine Levels of Evidence Working Group).