An international team of pediatric specialists, representing the worlds five major pediatric emergency medicine research networks, has identified several crucial risk factors for alerting clinicians to children most susceptible to life-threatening infections from the H1N1 influenza. It is the first study to detail which clinical factors at hospital arrival in children with influenza-like illness and H1N1 infection are associated with the progressive risk to either severe infection or death.
In a study now on online in the prestigious British Medical Journal, researchers examined pediatric cases from dozens of emergency departments in hospitals around the world during the global influenza pandemic of 2009. The results enabled the team to pinpoint several clinical risk factors for severe infections in youngsters who arrive at a hospital with influenza-like illnesses due to H1N1 infections. The information would be invaluable during a pandemic, when emergency departments and primary-care facilities experience large surges of young patients who arrive with flu-like symptoms.
The study, which assessed each patients clinical history and physical examination, identified the following predictors of severe H1N1 infection and potentially fatal outcomes in children:
-- History of chronic lung disease
-- History of cerebral palsy/developmental delay
-- Signs of chest retractions (difficulty breathing)
-- Signs of dehydration
-- Requires oxygen to keep blood levels normal
-- Heart rate that exceeds normal range (tachycardia) relative to age
The basic question clinicians face when they are in the middle of an influenza epidemic like H1N1 is whether their patient is at risk of severe complications, says Stuart Dalziel, lead author of the study and a pediatrician at New Zealands Starship Childrens Hospital and the University of Auckland, and vice-chair of the Pediatric Research in Emergency Departments International Collaborative (PREDICT) network. One of the key strengths of this study is that it provides clinicians with meaningful and more precise information that can enable them to identify those children with fever and flu-like symptoms who are at greater risk of severe complications.
The findings stem from 265 pediatric cases culled from 79 emergency departments of hospitals associated with the Pediatric Emergency Research Networks (PERN) in 12 countries.
Having a more accurate idea of what to look for in pediatric cases, especially during a pandemic, would be especially important to clinicians because it provides crucial guidance for those who would be trying to direct the appropriate levels of treatment for many patients in a short time, says Nathan Kuppermann, professor and chair of emergency medicine at the University of California, Davis, one of the studys senior authors and a principal investigator in the Pediatric Emergency Care Applied Research Network (PECARN).
Because of its unparalleled global network of hospitals and patient data, the PERN study also added weight to the efficacy and use of the anti-viral drug oseltamivir (trade name Tamiflu) to treat the children with H1N1 influenza virus infections to reduce the severity of infection. Researchers noted there was good evidence of an association between oseltamivir treatment and a reduced frequency of death in children admitted to an intensive care unit for assisted ventilation.
This study shows the incredible power of PERN, bringing together five pediatric emergency research networks and many emergency departments from around the world, to produce this very significant study which has the power to identify the most at-risk children in a future influenza pandemic, says Terry P. Klassen, the studys senior author, CEO and scientific director at the Manitoba Institute of Child Health in Canada and a site investigator with Pediatric Emergency Research Canada (PERC).
The global research collaborative is comprised of the five major pediatric networks, which are located in Europe and the Middle East (Research in European Paediatric Emergency Medicine, or REPEM), North America (PECARN, PERC and the Pediatric Emergency Medicine Collaborative Research Committee), and in Australia and New Zealand (PREDICT). Together, the five networks have access to data from more than three million pediatric emergency department cases annually from more than 100 hospitals, which are located in four of the six World Health Organization (WHO) regions.
Source: UC Davis Health System
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