Tehran University Medical Journal

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Background: Shoulder hemiarthroplasty is one of the established methods for management of proximal humerus fractures particularly in the types with more displacement so that fixation is not possible. Successful treatment is a challenge for shoulder surgeons especially in elderly patients. The aim of this study is to investigate the functional results and prognostic factors on shoulder hemiarthroplasty. Methods: Thirty nine patients operated by one shoulder surgeon in Imam Khomeini and Shariati Hospital in Tehran, Iran, from October 2005 to February 2009 were included in this study and followed postoperatively for at least one year. Mean (±SD) age was 49.7±14.3 years. Functional results were measured by constant score and pain was scored using visual analogue score. The relationship between factors such as age, injury to surgery interval, radiographic parameters and functional results were assessed. Results: Mean (±SD) constant score was 61.9±20.2. The age and injury to surgery interval showed a reverse correlation with constant score (p<0.05). There was a significant correlation between constant score and acromiohumeral interval (r=0.53) and head to tuberusity distance (-0.59). Median VAS score was 4.5 (interquartile range: 2- 5.2) that had a direct correlation with age (r=0.38) and injury to surgery interval (r=0.55) (p<0.05). Conclusions: Shoulder hemiarthroplasty should be performed in minimal delay from injury and this operation should be performed by an experienced shoulder surgeon to create the best anatomic position of prostheses. Careful rehabilitation particularly in older patients is very important to improve results.

Keywords: Shoulder, hemiarthroplasty, humerus

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