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Artificial Placenta may Improve Survival Rates in Premature Infants

by Bidita Debnath on April 30, 2016 at 12:53 AM
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Through an artificial placenta that mimics the womb, researchers at the University of Michigan are working to improve survival rates in the tiniest, most premature babies in a groundbreaking way.

The technology hasn't reached a clinical trial, but researchers from U-M's C.S. Mott Children's Hospital and Extracorporeal Circulation Research Laboratory are making dramatic progress. An extracorporeal artificial placenta at the institution has kept five extremely premature lambs alive for a week. The lambs were transferred to the artificial placenta which utilizes extracorporeal membrane oxygenation (ECMO) without ever taking their first breath.


 Artificial Placenta may Improve Survival Rates in Premature Infants
Artificial Placenta may Improve Survival Rates in Premature Infants

The ultimate goal of nearly a decade of sustained work: for an artificial placenta to help extremely premature babies with the greatest risks of disability or death continue critical organ development outside of their mother's womb.

A complete paradigm shift

Despite significant advances in the treatment of prematurity, the risk of death and long-term disability remains high for extremely premature infants born before 24 weeks - these babies' tiny bodies simply are not prepared for life outside the womb.

"One of the gravest risks for extremely premature babies is undeveloped lungs that are too fragile to handle even the gentlest ventilation techniques," says George Mychaliska, M.D., the principle investigator and director of the U-M's Fetal Diagnosis and Treatment Center. "If a baby's lungs are severely immature, they cannot provide the brain, heart and other organs the oxygen they need to survive."

Mychaliska, who has been referred to as Michigan's "fetus fixer" for his renowned fetal intervention work, has been leading research to improve outcomes for premature infants.

"We thought why don't we solve the problem of prematurity by recreating the intrauterine environment?" he says. "Maybe we should treat this tiny baby like a fetus. Maybe we should treat these babies as if they are still in the womb. This is a complete paradigm shift. Our research is still in a very preliminary stage, but we've passed a significant milestone that gives us promise of revolutionizing the treatment of prematurity.

"Although many of our current therapies are life-saving, they are not designed for premature babies and are often ineffective or contribute to complications," he adds.

How it works

The innovative artificial placenta simulates the intrauterine environment and provides gas exchange without mechanical ventilation. By recapitulating normal fetal physiology to recreate the intrauterine environment, the artificial placenta holds the promise of normal growth and development outside the womb for extremely premature infants until they are ready for postnatal life. The success of keeping lambs alive through this technique was a crucial milestone in securing a $2.7 million R01 NIH grant helping accelerate this research.

The way forward

Over the next five years, researchers expect to demonstrate that an artificial placenta can be used to simulate the intrauterine environment and support a fetal lamb from extreme prematurity to normal newborn physiology. The next step would be to determine if the milestones would justify preliminary clinical trials in extremely premature babies.

Source: Newswise


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