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Study Shows Medical Devices Complicate Complex Conditions in Kids

CINCINNATI, June 7, 2013 /PRNewswire-USNewswire/ -- As modern medical advances help more children with complex conditions live longer, a new study shows a significant number suffer from complications caused by medical devices that are also necessary for their survival.


Researchers report their findings online June 7 in the Journal of Hospital Medicine. Study authors say their research underscores the continued need to improve care for this growing population of children by enhancing medical device safety practices and ensuring device design is suitable or adaptable for pediatric patients.

"Medicine and pediatrics have made amazing advances over the last couple of decades that have resulted in children with congenital diseases and prematurity living longer, so this issue is a by-product of that success," said Patrick Brady, MD, MSc, the lead author and a physician in the Division of Hospital Medicine at Cincinnati Children's Hospital Medical Center.

Brady said medical devices are a major factor in improved survival for children with complex medical conditions. But he added there has been relatively little research into how medical devices may expose these children to additional risks, especially when considering the devices are foreign objects to the human body and subject to mechanical problems or causing infections. Also, researchers note that most medical devices are designed for adults and have to be adapted for use in children.

The retrospective study's objective was to describe the prevalence and nature of adverse medical device events (AMDEs) in 44 free-standing tertiary care children's hospitals in the United States. Using data from the Pediatric Health Information Systems (PHIS), researchers analyzed medical information from 2004-2011.

Of 4.1 million patient admissions during the study period, 3.3 percent (136,465) involved at least one adverse event related to a medical device. At first glance that number may seem small, but Brady emphasized the study identified more than 12,000 AMDEs during each year of the study. And because of how information is labeled in the PHIS system, researchers suspect their data actually underestimates the prevalence of AMDEs.

The PHIS system also did not allow researchers to identify whether the AMDEs were caused by factors such as biological reactions to devices, human error, malfunction, etc. It did allow them to identify which types of devices were more prone to adverse events.

The two most common device types associated with AMDEs were vascular access devices (such as central venous lines)) and nervous system devices (often involving shunts designed to drain excess cerebral spinal fluid from the brain). These two device types together represented 44.4 percent of AMDEs in the study.

Also standing out in the data is that 75.5 percent of AMDEs involved children with complex medical conditions, and the largest age group (40 percent of those with AMDEs) involved children age 2 or less.

"Although our study cannot answer too much of the 'why' for these events, it does point out that AMDEs are not rare and the burden falls largely on young children with complex chronic conditions," Brady explained. "This is a somewhat early step that will allow our team and other researchers to start asking questions about what causes these events, how to predict them, and how we can design interventions to decrease their frequency."

The study complements recent efforts – including involvement from the U.S. Food and Drug Administration (FDA) – to enhance post-market surveillance of pediatric medical devices to improve their use and safety. One of the current study's co-authors is Thomas Gross, MD, MPH, director of the FDA's Office of Surveillance and Biometrics in the Center for Devices and Radiologic Health.

Funding support for the study came in part from cooperative agreement number U18 HS016957-03 from the Agency for Healthcare Research and Quality. Brady was supported by funds from the Bureau of Health Professions (BHPr), Health Resources and Services Administration (HRSA), and Department of Health and Human Services (DHHS) under grant T32 HP10027.

About Cincinnati Children's
Cincinnati Children's Hospital Medical Center ranks third in the nation among all Honor Roll hospitals in U.S.News and World Report's 2012 Best Children's Hospitals ranking. Cincinnati Children's is one of the top two recipients of pediatric research grants from the National Institutes of Health, and a research and teaching affiliate of the University of Cincinnati College of Medicine.  The medical center is internationally recognized for improving child health and transforming delivery of care through fully integrated, globally recognized research, education and innovation. Additional information can be found at Connect on the Cincinnati Children's blog, via Facebook and on Twitter.

SOURCE Cincinnati Children's Hospital Medical Center
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