Studying 213 babies born weighing less than 3 pounds, 5 ounces, the researchers noted that the smaller the infants were at birth and the less time they spent in the womb, the more likely they were to have some form of brain damage. Babies born with infections were more likely than those without infections to have brain complications. The report is published in the June issue of the journal Obstetrics & Gynecology.

"A lot of medical malpractice cases try to relate brain damage to oxygen deficiency during the birthing process," says lead author Cynthia J. Holcroft, M.D., an instructor of gynecology and obstetrics. "In our study, oxygen deficiency played a very small role in the neurologic injuries seen in these infants. Even with the increase in the Caesarian rate from 5 percent to almost 25 percent, and the widespread introduction of electronic fetal heart rate monitoring, the incidence of cerebral palsy and other problems has remained unchanged over the past 40 years."

Researchers followed all babies born at Johns Hopkins between April 1999 and December 2001 weighing less than 3 pounds, 5 ounces and who were admitted to the hospital's neonatal intensive care unit. To compare those born with brain disorders such as seizures or bleeding, and those born without such complications, they reviewed all maternal and neonatal records, checking gestational age at delivery, mode of delivery, birth weights, Apgar scores (measure of newborns' development and health) and infection, among other factors.

Seventy-seven (36 percent) of the infants studied had some type of neurologic problem. Of those, 61 had bleeding, eight had seizures, 13 had hydrocephalus (an abnormal increase in cerebrospinal fluid) and nine had periventricular leukomalacia (brain softening). Several in
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Contact: Karen Blum
kblum@jhmi.edu
410-955-1534
Johns Hopkins Medical Institutions
6-Jun-2003