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Survival Rate is Improving for Very Early Preterm Infants

by Dr. Trupti Shirole on February 20, 2017 at 2:04 PM
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 Survival Rate is Improving for Very Early Preterm Infants

Providing care to very early preterm infants is often challenging. Physicians and family members can be reluctant to expose an infant to sometimes painful life-support procedures. Those offered active treatment may survive, but may have hearing loss, blindness, cerebral palsy, and severe intellectual disability.

Very early preterm infants are more likely to survive than in previous years, and the survivors are less likely to have neurological problems, revealed an analysis of records from a National Institutes of Health research network.

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Researchers found that of the more than 4,000 infants born at 11 sites within the network from 2000 to 2011, survival rates increased from 30% to 36%. The proportion of survivors who did not have a neurological or developmental impairment increased from 16% to 20%.

The authors theorize that these improvements are a result of advances in the care provided to expectant mothers and their newborns. The study appears in the New England Journal of Medicine.
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"Our study provides important information for physicians and family members planning the care of these extremely fragile newborns," said study author Rosemary Higgins, a program scientist at NIH's Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD). The study was conducted by researchers in the NICHD-funded Neonatal Research Network.

Infants in the study were born between the 22nd and 24th week of pregnancy, far earlier than the 40 weeks generally expected for a pregnancy to reach term. Those born from 2008 to 2011 had the lowest death rate (64%). From 2004 to 2007, the death rate was 70%, unchanged from 2000 to 2003.

Dr. Higgins stressed that the results encompass trends for a large number of infants at multiple research sites, but they should not be used to predict the outcome for an individual child.

"Every individual is different, and no single source of information can precisely predict a baby's chances of survival or disability," she said. "But our study's findings do provide important information that physicians and family members can consult to help determine treatment strategies."

The study authors wrote that, in the past, many experts had feared that advances leading to improvements in survival among extremely preterm infants might also result in a higher proportion of infants with disabilities. However, in the current study, researchers found that across all three time intervals, the percentage of infants who survived with a disability did not change significantly.

The authors wrote that the increases in overall survival and survival without neurological harm likely result from improvements in the care given to mothers and newborns. One potential contributing factor is the wider use of antenatal steroids. These drugs, which are given to women at risk for preterm birth, help the infant's lungs mature, leaving the infant less reliant on ventilation therapy, which can sometimes damage the lungs and lead to infections.

Source: Eurekalert
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