• Rahul Vaidya, Kevin Blue, Bryant Oliphant, and Fred Tonnos.
• Detroit Medical Center, Wayne State University, Detroit, MI.
• J Orthop Trauma. 2019 Feb 1; 33 Suppl 2: S66-S71.

ObjectiveThe purposes of this article were to (1) compare our combined pelvic ring and acetabular fracture patients' rate of mortality and Injury Severity Score (ISS) to those of patients with isolated injuries at our center and to those with combined injuries as reported in the literature, (2) describe our treatment algorithm using the INFIX for these combination injuries, and (3) report our patients' radiographic and functional outcomes.DesignRetrospective IRB-approved case series and literature review.SettingUS Level 1 Trauma Center.Patients/ParticipantsThousand six hundred ninety-seven with acetabular or pelvic ring injury, 174 patients with combination pelvic ring acetabular injuries, and 39 patients with 41 acetabular injuries treated with a surgical protocol.InterventionPelvic ring reduction using INFIX and posterior fixation followed by acetabular reduction fixation. Anterior injury fixed with INFIX.Main OutcomeMortality, ISS, pelvic reduction by Keshishyan index, acetabular reduction by the Matta criteria, and functional outcome by the Majeed score.ResultsMortality was 5.7% and ISS was 12.5 for 174 combined injury patients. In the 39 patients with 41 injuries, excellent pelvic reduction was found in 39, and acetabular reduction was anatomic in 25 (61%), imperfect in 12 (29%), and poor in 4 (10%). Clinically 78% of the patients had good or excellent outcome and 22% had a fair or poor outcome. Nonanatomic acetabular reduction, persistent sciatic nerve palsy, and heterotopic ossification associated with poor clinical outcome.ConclusionsOur treatment protocol resulted in excellent pelvic reduction, anatomic acetabular reduction in 61% of patients, and 78% good to excellent clinical outcome.Level Of EvidenceCase series Level IV.

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