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Re: fazeel_fetalvein From: Dr. Fazeel Zaman (drfazeel1@gmail.com) Mon Nov 26 13:12:29 2007 Messages sorted by: [ date ][ thread ][ subject ][ author ] Previous message: dr udayakumar: "fazeel_fetalvein" Dear Udaya, it was a very old thread of discussion. Thanks again. How did it resurface? actually i agained resubscribed to obgyn.net fazeel On 11/26/07, dr udayakumar <drudaya@vsnl.com> wrote: > > Its due to maternal breathing. The undulation is an artefact produced by > small changes in doppler angle produced by movement of the maternal > abdominal wall. Since the sample volume includes both vessels ( viz., the > umbical artery and umb vein) in both the pictures, the effect is seen in > both arterial and venous waveforms. > ..Dr.Udayakumar, Chennai, India > Previous message: dr udayakumar: "fazeel_fetalvein"

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