• Sandro Hodel, Tobias Koller, Björn-Christian Link, Marco Rossi, Reto Babst, and Frank J P Beeres.
• Department of Orthopaedic and Trauma Surgery, Luzerner Kantonsspital, CH-6000 Luzern, Switzerland. Electronic address: sandro.hodel@balgrist.ch.
• Injury. 2018 Aug 1; 49 (8): 1532-1537.

IntroductionTemporary external fixation is a viable option for numerous conditions and fixations in orthopaedic and trauma surgery. If the external fixator is left in place it is necessary to disinfect it prior to surgery, yet the subsequent risk for bacterial contamination of the surgical site originating from the external fixator remains unknown.Material And MethodsIn a prospective study, samples were taken at the time of definitive osteosynthesis to assess bacterial contamination of the surgical site and the external fixator in twenty consecutive patients treated with temporary external fixation for closed fractures from October 2016 until March 2017.ResultsTwenty external fixators of twenty patients with complete sampling and a mean follow-up of seven months (range: 3-14) were available for analysis. Ten out of 120 cultures of the surgical site (8.3%) were positive for bacterial growth in a total of seven patients (35%). Pathogen's detected were Propionibacterium acnes (60%) and Staphylococcus epidermidis (30%). No contamination of the external fixator was detected.ConclusionWe conclude that the presented perioperative management to decontaminate external fixators allows for a safe definitive osteosynthesis in a staged protocol without increasing bacterial contamination of the surgical site. It is safe to leave the external fixator in place for definitive osteosynthesis.Copyright © 2018 Elsevier Ltd. All rights reserved.

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