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External fixation as a definitive treatment for humeral shaft fractures. Radiographic and functional results with analysis of outcome predictors.
Journal of Orthopaedic Trauma 2019 Februrary 27
OBJECTIVES: to evaluate the results obtained using unilateral external fixation as a definitive treatment for humeral shaft fractures and to identify possible predictors of radiographic and functional outcomes.
DESIGN: Retrospective study.
SETTING: Study involving one large metropolitan hospital.
PATIENTS: A consecutive cohort of 107 patients who underwent external fixation for 109 humeral shaft fractures.
MAIN OUTCOME MEASURES: Union rate, time to fracture healing, and functional assessment with Disabilities of the Arm, Shoulder and Hand (DASH) Questionnaire, Constant score, Mayo Elbow Performance Index (MEPI), and return to pre-fracture sports activity at a minimum of 2 years following surgery. Comorbidities were evaluated using the Cumulative Illness Rating Scale (CIRS). Multiple linear regression analysis was used to determine whether any explanatory variables were significantly associated with the outcomes.
RESULTS: The union rate in 109 humeral shaft fractures was 97.2 % (106/109) at a mean of 99.2 days. Two patients (1.8 %) had delayed union and one (0.9 %) did not achieve union. At the latest follow-up, the mean CS, MEPI, and DASH Questionnaire score was 85.6, 97.4, and 7.4 points, respectively. All patients engaged in sports activities before fracture resumed a sport activity. At the multiple linear regression analysis, obesity was directly related to a delayed healing of fracture (P = 0.010) and comorbidity was the most important determinant of the functional outcomes at follow-up (P < 0.001).
CONCLUSIONS: These data support the use of unilateral external fixation as an effective therapeutic option in patients with humeral shaft fracture. Comorbidity as assessed by CIRS score is the most important determinant of functional outcomes.
DESIGN: Retrospective study.
SETTING: Study involving one large metropolitan hospital.
PATIENTS: A consecutive cohort of 107 patients who underwent external fixation for 109 humeral shaft fractures.
MAIN OUTCOME MEASURES: Union rate, time to fracture healing, and functional assessment with Disabilities of the Arm, Shoulder and Hand (DASH) Questionnaire, Constant score, Mayo Elbow Performance Index (MEPI), and return to pre-fracture sports activity at a minimum of 2 years following surgery. Comorbidities were evaluated using the Cumulative Illness Rating Scale (CIRS). Multiple linear regression analysis was used to determine whether any explanatory variables were significantly associated with the outcomes.
RESULTS: The union rate in 109 humeral shaft fractures was 97.2 % (106/109) at a mean of 99.2 days. Two patients (1.8 %) had delayed union and one (0.9 %) did not achieve union. At the latest follow-up, the mean CS, MEPI, and DASH Questionnaire score was 85.6, 97.4, and 7.4 points, respectively. All patients engaged in sports activities before fracture resumed a sport activity. At the multiple linear regression analysis, obesity was directly related to a delayed healing of fracture (P = 0.010) and comorbidity was the most important determinant of the functional outcomes at follow-up (P < 0.001).
CONCLUSIONS: These data support the use of unilateral external fixation as an effective therapeutic option in patients with humeral shaft fracture. Comorbidity as assessed by CIRS score is the most important determinant of functional outcomes.
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