When a child's body enters septic shock—that terrifying cascade where infection triggers organ failure—every second counts and every decision matters. Now, a landmark study spanning five countries and 47 pediatric emergency departments has given frontline doctors a clear answer to a question that has shadowed their work for years: which intravenous fluid should they reach for first?
The answer, published in the New England Journal of Medicine, is reassuring in its simplicity. Balanced crystalloid fluid and 0.9% saline—the two most common IV fluids used for resuscitation—work equally well. There is no hidden advantage, no secret superior choice. For emergency medicine teams worldwide, especially those in resource-limited settings, this is transformative news.
Ann & Robert H. Lurie Children's Hospital in Chicago anchored this multinational effort, enrolling over 9,000 children aged 2 months to 18 years with suspected septic shock. The research team, led by Dr. Elizabeth Alpern, Division Head of Emergency Medicine at Lurie Children's and professor at Northwestern University Feinberg School of Medicine, searched for meaningful differences in outcomes between the two fluids. They looked at kidney injury specifically—a concern that had fueled the debate for years—and examined rates of major adverse kidney events and persistent kidney dysfunction at 30 days. They found none.
"Our study provides a definitive answer that there is no additional benefit or harm from using one type of IV fluid over another for septic shock resuscitation in children," Dr. Alpern said. "This is great news, since centers around the world can now confidently use whichever of these IV fluids is readily available."
What makes this research particularly striking is not just what it found, but how it was designed. Because obtaining traditional informed consent in a medical emergency is often impossible, the team did something more thoughtful: they asked the community first. Researchers held focus groups with parents of children at highest risk for sepsis—those with cancer, immune deficiencies, and other complex conditions. At Lurie Children's specifically, both the Family Advisory Board and Kids Advisory Board were consulted. Families in the emergency department and pediatric intensive care unit were surveyed. Hospital posters and online outreach gave the community a voice in shaping the study. Families were even given the option to opt out in advance.
This collaborative approach reflects a broader shift in medical research: the recognition that those closest to the problem—the families living with these conditions—should help shape the science meant to help them. It built trust at the very moment when trust matters most.
The implications ripple outward immediately. Emergency medicine teams no longer need to stock both fluids equally or agonize over which option to deploy in the chaotic first minutes of treatment. Hospitals in developing nations that may have more reliable access to one fluid over the other can proceed with confidence. The clinical debate that has occupied researchers for years can finally settle, freeing attention for the next frontier: discovering new ways to improve outcomes for children battling septic shock.
"Now we can move on from the debate about what kind of fluid is best and focus on new ways to improve care for kids with septic shock," Dr. Alpern said. For children in emergency departments worldwide, that shift in focus could be lifesaving.