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PERCUTANEOUS FIXATION OF PROXIMAL HUMERAL FRACTURES



Abstract

Two-part surgical neck fractures, two-part greater tuberosity fractures and three- and four-part fractures of the proximal humerus represent a frequently encountered clinical problem. Many types of conservative treatments have been proposed, with a poor functional outcome, however; when the fracture fragments are displaced, surgery is required.

Because the open reduction and the internal fixation disrupts soft tissue and increases the risk of avascular necrosis of the humeral head, closed or minimally open reduction and percutaneous pin fixation should represent an advantage.

We report on 31 patients affected by fractures of the proximal humerus (n=6, two-part surgical neck fractures; n=5, with two-part greater tuberosity fractures; n=10, three-part fractures; and n=11, four- part fractures) treated with minimally open reduction and percutaneous fixation. The average age was 57 years. Most of the four-part fractures were of the valgus type with no significant lateral displacement of the articular segment. A small skin incision was performed laterally at the shoulder and a rounded-tipped instrument was introduced to obtain the fracture reduction; this latter was stabilised by percutaneous pins and cannulate screws.

A satisfactory reduction was achieved in most cases. The average follow-up was 24 months (range 18–47). Only one patient, with four-part fractures associated with lateral displacement of the humeral head, showed avascular necrosis and received a prosthetic implant.

Minimally open reduction and percutaneous fixation is a non-invasive technique with a low risk of avascular necrosis and infection. This surgical technique allows a stable reduction with minimal soft tissue disruption and facilitates postoperative mobilisation.