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Trends and predictors of mortality in unstable pelvic ring fracture: a 10-year experience with a multidisciplinary
Hsien-Te Chen1,2,3, Yu-Chun Wang4,5,6, Chen-Chou Hsieh4
11Department of Orthopedic Surgery, China Medical University Hospital, Taichung, Taiwan.
Background:
Pelvic ring fracture is often combined with other injuries and such patients are considered at high risk of mortality and complications. There is controversy regarding the gold standard protocol for the initial treatment of pelvic fracture. The aim of this study was to assess which risk factors could affect the outcome and to analyze survival using our multidisciplinary institutional protocol for traumatic pelvic ring fracture.
Material And Methods:
This retrospective study reviewed patients who sustained an unstable pelvic ring fracture with Injury Severity Score (ISS) ≥ 5. All patients were admitted to the emergency department and registered in the Trauma Registry System of a level I trauma center from January 1, 2008, to December 31, 2017. The annular mortality rate after the application of our institutional protocol was analyzed. Patients with different systems of injury and treatments were compared, and regression analysis was performed to adjust for factors that could affect the rate of mortality and complications.
Results:
During the 10-year study period, there were 825 unstable pelvic ring injuries, with a mean ISS higher than that of other non-pelvic trauma cases. The annual mortality rate declined from 7.8 to 2.4% and the mean length of stay was 18.1 days. A multivariable analysis showed that unstable initial vital signs, such as systolic blood pressure < 90 mmHg (odds ratio [OR] 2.53; confidence interval [CI] 1.11-5.73), Glasgow Coma Scale < 9 (OR 3.87; CI 1.57-9.58), 24 > ISS > 15 (OR 4.84; CI 0.85-27.65), pulse rate < 50 (OR 11.54; CI 1.21-109.6), and diabetes mellitus (OR 3.18; CI 1.10-9.21) were associated with higher mortality. No other specific system in the high Abbreviated Injury Scale increased the rates of mortality or complications.
Conclusion:
Poor initial vital signs and Glasgow Coma Scale score, higher ISS score, and comorbidity of diabetes mellitus affect the mortality rate of patients with unstable pelvic ring fractures. No single system of injury was found to increase mortality in these patients. The mortality rate was reduced through institutional efforts toward the application of guidelines for the initial management of pelvic fracture.
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