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Re: OB: AFP triple re-calculations From: Efrain Ramirez (eramirez@icepr.com) Wed Jan 31 19:19:46 2001 Messages sorted by: [ date ][ thread ][ subject ][ author ] Next message: J. Hellriegel: "Re: Uterus Didelphys" Previous message: Efrain Ramirez: "Re: OB: Preterm labor/transfer" In reply to: Garry Siegel: "OB: AFP triple re-calculations" If CRL is within 5 days of her LMP's EDD I stick with LMP -if it's more than that I change dates - I also prefer to do my own CRL. At Tue, 30 Jan 2001, Garry Siegel wrote: > >I am aware that AFP triple screening is dependent on dates, and I >believe that the ultrasound EDC from a first trimester scan is "better" >than the LMP generated date. > >So, now you see a patient at 8 to 9 weeks, and her LMP is >perfect/regular/known/28 days/no pills/yada, and her vagscan is within 5 >days. If you are like me, her EDC is based on the LMP, and that's >that--the scan corroborates it, but doesn't change it. > >Now, she's 16.3 weeks, and the triscreen is abnormal with an increased >Down risk of 1:215 (she is 32 years old), using 16 weeks, which was >based on the LMP. > >Do you ask the lab to recalculate, in that if you use the scan EDC, it >makes her 15.7 weeks when the test was done? > >Garry > >-- >Garry E. Siegel, M.D., F.A.C.O.G. >Roswell, GA >Private Practice > -- "Life is neither the notes nor the silence between the notes, but the music that arises out of sound and silence felt as a living whole. Stop choosing...between chaos and order, and live at the boundary between them, where rest and action move together..." David Whyte Next message: J. Hellriegel: "Re: Uterus Didelphys" Previous message: Efrain Ramirez: "Re: OB: Preterm labor/transfer" In reply to: Garry Siegel: "OB: AFP triple re-calculations"

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