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SAN FRANCISCO -- Birth injuries from shoulder dystocia are increased among women with a high body mass index, according to a poster presented by Stacy M. Colombo and colleagues at the annual meeting of the American College of Obstetricians and Gynecologists.
In a retrospective chart review from Christus St. Joseph Hospital, Houston, the investigators compared 202 deliveries involving shoulder dystocia with 606 normal vaginal deliveries.
While there was no significant difference in body mass index (BMI) between cases and controls, there was a significant difference in which infants were injured as a result of their shoulder dystocia. Mothers of babies who were injured had an average BMI of 40.2 kg/[m.sup.2], while mothers of uninjured babies had an average BMI of 33.8 kg/[m.sup.2].
In particular, women with BMIs over 40 kg/[m.sup.2] were 3.8 times as likely to have an infant with Erb's palsy as those with lower BMIs when shoulder dystocia occurred.
The number of nurses in the delivery room was inversely associated with the risk of Erb's palsy after shoulder dystocia. When there was a single nurse in the ...