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  • Title: Increased extracorporeal membrane oxygenation center case volume is associated with improved extracorporeal membrane oxygenation survival among pediatric patients.
    Author: Karamlou T, Vafaeezadeh M, Parrish AM, Cohen GA, Welke KF, Permut L, McMullan DM.
    Journal: J Thorac Cardiovasc Surg; 2013 Feb; 145(2):470-5. PubMed ID: 23246046.
    Abstract:
    OBJECTIVE: We sought to examine the relationship between extracorporeal membrane oxygenation center case volume and survival in pediatric patients requiring extracorporeal membrane oxygenation support. METHODS: Pediatric patients (≤ 20 years) undergoing extracorporeal membrane oxygenation cannulation were identified using the Healthcare Cost and Utilization Project Kids' Inpatient Database for 2000 to 2009. Annual hospital extracorporeal membrane oxygenation volume tertiles were <15 patients/year (low volume), 15 to 30 patients/year (medium volume), and >30 patients/year (high volume). Cases of extracorporeal membrane oxygenation were segregated by indication into cardiac and noncardiac groups. Cases of cardiac extracorporeal membrane oxygenation were mapped to Risk Adjustment for Congenital Heart Surgery categories to adjust for case complexity. Weighted multivariable logistic and linear regression models identified determinants of in-hospital mortality. RESULTS: Overall, 3867 cases of extracorporeal membrane oxygenation were identified, yielding a national estimate of 6333 ± 495 cases. Extracorporeal membrane oxygenation was used with nearly equivalent prevalence across volume tertiles for all Risk Adjustment for Congenital Heart Surgery categories, suggesting that patient selection for extracorporeal membrane oxygenation was fairly uniform. A higher annual extracorporeal membrane oxygenation volume tertile was associated with reduced in-hospital mortality (P = .01) within nearly all Risk Adjustment for Congenital Heart Surgery categories. After adjustment for Risk Adjustment for Congenital Heart Surgery category and other patient variables, lower extracorporeal membrane oxygenation volume remained an important determinant of in-hospital death (odds ratio, 1.75; 95% confidence interval, 1.03-2.94; P = .03). CONCLUSIONS: Higher extracorporeal membrane oxygenation case volume is associated with improved hospital survival in pediatric cardiac extracorporeal membrane oxygenation patients. The results of this study may support the paradigm of regionalized centers of excellence for managing pediatric cardiac extracorporeal membrane oxygenation patients.
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