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EFW accuracyFrom: Darrell Vaughan (dvaughan@nirai.ne.jp)Mon May 19 20:16:54 2008
Regarding a case of severe shoulder dystocia, finally delivered by the Zavanelli maneuver and C-section, in which the baby was severely injured, I have questions about the accuracy of the EFW. (Background: The mother was a Japanese G2 P1 with a history of vaginal delivery of a 3350gm female. 8 days prior to delivery the EFW was 3750gm (female). 3 days prior to delivery the EFW was 3580gm (almost 200gm less). At delivery at 40 5/7 weeks after spontaneous labor, the actual birth weight was 4325gm.) Is it outside of acceptable norms to measure 200gm less after a 5-day interval in such a case, or can this be attributed to the normal amount of measurement error at this EGA? The AC was especially subject to measurement variation. Is either EFW (3750gm or 3580gm) outside of acceptable norms when the actual BW is 4325gm 8 and 3 days later, respectively? Thanks for any input.
-- Darrell Vaughan
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