Abstract
Background
After a complex dislocation, some elbows remain unstable after closed reduction or fracture treatment. Function after treatment with a hinged external fixator theoretically allows collateral ligaments to heal without surgical reconstruction. However, there is a lack of prospective studies that assess functional outcome, pain, and ROM.
Questions/purposes
We asked: (1) In complex elbow fracture-dislocations, does treatment with a hinged external fixator result in reduction of disability and pain, and in improvement in ROM, function, and quality of life? (2) Does delayed treatment (7 days or later) have a negative effect on ROM after 1 year? (3) What are the complications seen after external fixator treatment?
Methods
During a 2-year period, 11 centers recruited 27 patients 18 years or older who were included and evaluated at 2 and 6 weeks and at 3, 6, and 12 months after surgery as part of this prospective case series. During the study period, the participating centers agreed on general indications for use of the hinged external fixator, which included persistent instability after closed reduction alone or closed reduction combined with surgical treatment of associated fracture(s), when indicated. Functional outcome was evaluated using the Quick Disabilities of the Arm, Shoulder and Hand (QuickDASH; primary outcome) score, the Mayo Elbow Performance Index (MEPI), the Oxford Elbow Score, and the level of pain (VAS). ROM, adverse events, secondary interventions, and radiographs also were evaluated. A total of 26 of the 27 patients (96%) were available for followup at 1 year.
Results
All functional and pain scores improved. The median QuickDASH score decreased from 30 (25th–75th percentiles [P25–P75], 23–40) at 6 weeks to 7 (P25–P75, 2–12) at 1 year with a median difference of −25 (p < 0.001). The median MEPI score increased from 80 (P25–P75, 64–85) at 6 weeks to 100 (P25–P75, 85–100) at 1 year with a median difference of 15 (p < 0.001). The median Oxford Elbow Score increased from 60 (P25–P75, 44–68) at 6 weeks to 90 (P25–P75, 73–96) at 1 year with a median difference of 29 (p < 0.001). The median VAS decreased from 2.8 (P25–P75, 1.0–5.0) at 2 weeks to 0.5 (P25–P75, 0.0–1.9) at 1 year with a median difference of −2.1 (p = 0.001). ROM also improved. The median flexion-extension arc improved from 50° (P25–P75, 33°–80°) at 2 weeks to 118° (P25–P75, 105°–138°) at 1 year with a median difference of 63° (p < 0.001). Similarly, the median pronation-supination arc improved from 90° (P25–P75, 63°–124°) to 160° (P25–P75, 138°–170°) with a median difference of 75° (p < 0.001). At 1 year, the median residual deficit compared with the uninjured side was 30° (P25–P75, 5°–35°) for the flexion-extension arc, and 3° (P25–P75, 0°–25°) for the pronation-supination arc. Ten patients (37%) experienced a fixator-related complication, and seven patients required secondary surgery (26%). One patient reported recurrent instability.
Conclusions
A hinged external elbow fixator provides enough stability to start early mobilization after an acute complex elbow dislocation and residual instability. This was reflected in good functional outcome scores and only slight disability despite a relatively high complication rate.
Level of Evidence
Level IV, therapeutic study.
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Acknowledgments
We thank the Oxford and Isis Outcomes, part of Isis Innovation Limited, for their kind support. We also thank Mr. Kiran C. Mahabier, MD (Trauma Research Unit, Department of Surgery, Erasmus MC, Rotterdam, The Netherlands) and Mr. Harold Goei, Mr. Gerben De Resu, and Mrs. Liza van Loon (Trauma Research Unit Department of Surgery, Erasmus MC, Rotterdam, The Netherlands) for assistance with data collection.
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The institution of one or more of the authors (GITI, DDH, EMMVL, PP, MHJV) has received, during the study period, funding from the Osteosynthesis and Trauma Care (OTC) Foundation (Zuchwil, Switzerland) (No. 2009-NSPP) and from Orthofix SRL (Bussolengo, Italy).
All ICMJE Conflict of Interest Forms for authors and Clinical Orthopaedics and Related Research ® editors and board members are on file with the publication and can be viewed on request.
Each author certifies that his or her institution approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research, and that informed consent for participation in the study was obtained.
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Dutch Elbow Collaborative: M. W. G. A. Bronkhorst (Bronovo Hospital, Den Haag, The Netherlands), M. R. De Vries (Reinier de Graaf Groep, Delft, The Netherlands), J. C. Goslings (AMC, Amsterdam, The Netherlands), S. J. Rhemrev (MC Haaglanden, Den Haag, The Netherlands), G. R. Roukema (Maasstad Ziekenhuis, Rotterdam, The Netherlands), H. G. W. M. Van der Meulen Haga Ziekenhuis, Den Haag, The Netherlands), E. J. M. M. Verleisdonk (Diakonessenhuis, Utrecht, The Netherlands), J. P. A. M. Vroemen (Amphia Ziekenhuis, Breda, The Netherlands), Ph. Wittich (St. Antonius Ziekenhuis, Nieuwegein, The Netherlands).
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Iordens, G.I.T., Den Hartog, D., Van Lieshout, E.M.M. et al. Good Functional Recovery of Complex Elbow Dislocations Treated With Hinged External Fixation: A Multicenter Prospective Study. Clin Orthop Relat Res 473, 1451–1461 (2015). https://doi.org/10.1007/s11999-014-3959-1
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DOI: https://doi.org/10.1007/s11999-014-3959-1