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Treatment of External Fixation Pins About the Wrist: A Prospective, Randomized Trial

¹ Department of Orthopaedic Surgery, New York University—Hospital for Joint Diseases, 301 East 17th Street, New York, NY 10003. E-mail address for K.A. Egol: ljegol{at}att.net
² Dartmouth-Hitchcock Medical Center, 1 Medical Center Drive, Lebanon, NH 03756

Investigation performed at the Department of Orthopaedic Surgery, New York University—Hospital for Joint Diseases, New York, NY

A commentary is available with the electronic versions of this article, on our web site (www.jbjs.org) and on our quarterly CD-ROM (call our subscription department, at 781-449-9780, to order the CD-ROM).

The authors did not receive grants or outside funding in support of their research for or preparation of this manuscript. They did not receive payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity. No commercial entity paid or directed, or agreed to pay or direct, any benefits to any research fund, foundation, educational institution, or other charitable or nonprofit organization with which the authors are affiliated or associated.

Methods: One hundred and eighteen patients (120 wrists) who had been managed with the placement of an external fixation device for the treatment of a displaced, unstable, distal radial fracture were randomized into one of three treatment groups: (1) weekly dry dressing changes without pin-site care; (2) daily pin-site care with a solution of one-half normal saline solution and one-half hydrogen peroxide; and (3) treatment with the placement of chlorhexidine-impregnated discs (Biopatch) around the pins, with weekly changes of the discs by the treating surgeon. The patients were followed at weekly intervals until the external fixator was removed. Radiographs were made biweekly. The patients were evaluated with regard to (1) erythema, (2) cellulitis, (3) drainage, (4) clinical or radiographic evidence of pin-loosening, (5) the need for antibiotics, and (6) the need for pin removal before fracture-healing due to infection. Differences in complication rates among the three groups, with adjustment for patient age, gender, and the performance of an associated open procedure, were evaluated.

Results: The average age of the patients was fifty-four years. Forty-seven wrists had an open procedure (either bone-grafting or open reduction and internal fixation) in addition to treatment with the external fixator. The fixators remained in place for an average of 5.9 weeks. Twenty-three patients (19%) had a complication related to the pin track, with twelve of these patients requiring oral antibiotics for the treatment of a pin-track infection. There were no significant differences among the three groups with regard to the prevalence of pin-site complications. The age of the patient was found to be significantly associated with an increased risk of postoperative pin-track complications (p = 0.04).

Conclusions: We found a high rate of local wound complications around external fixation pin sites; however, most complications were minor and could be observed or treated with oral antibiotics. The prevalence of these complications was not decreased in association with the use of hydrogen peroxide wound care or chlorhexidine-impregnated dressings. On the basis of these results, we do not recommend additional wound care beyond the use of dry, sterile dressings for pin-track care after external fixation for the treatment of distal radial fractures.

Level of Evidence: Therapeutic Level II. See Instructions to Authors for a complete description of levels of evidence.

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