tailieunhanh - Ultrasound in obstetrics

Ultrasound has become an integral component of obstetric care, with the vast majority of patients having at least one ultrasound examination during pregnancy. From the determination of early pregnancy and gestational age to the evaluation of fetal growth and well being, ultrasound is a valuable diagnostic tool for the practicing obstetrician. Recent advances in obstetric ultrasonography have increased its importance in managing pregnancies at risk for aneuploidy, structural anomalies, preterm delivery, and blood flow abnormalities. . | ELSEVIER VUADtRt OBSTETRICS AND GYNECOLOGY CLINICS OF NORTH AMERICA ELSEVIER SAUNDERS Obstet Gynecol Clin N Am 31 2004 xi-xiii Preface OBSTETRICS AND GYNECOLOGY CLINICS OF NORTH AMERICA Ultrasound in obstetrics Lynn L. Simpson MD Guest Editor Ultrasound has become an integral component of obstetric care with the vast majority of patients having at least one ultrasound examination during pregnancy. From the determination of early pregnancy and gestational age to the evaluation of fetal growth and well being ultrasound is a valuable diagnostic tool for the practicing obstetrician. Recent advances in obstetric ultrasonography have increased its importance in managing pregnancies at risk for aneuploidy structural anomalies preterm delivery and blood flow abnormalities. Compiled of contributions from leading experts across the country this issue of Obstetrics and Gynecology Clinics of North America demonstrates the expanding role of ultrasound in the field of obstetrics. In the United States ultrasound has been incorporated into prenatal screening programs aimed at identifying fetal chromosomal abnormalities. From their important work on the FASTER Trial First and Second Trimester Evaluation of Risk a multicenter prospective study comparing first and second trimester methods of screening for fetal aneuploidy Karlla Brigatti and Dr. Malone provide a thorough review of first trimester screening including the ultrasonographic evaluation of nuchal translucency. The genetic sonogram comprised of an evaluation of various sonographic markers during the second trimester has been used to provide an individualized risk assessment for patients. An expert in both Maternal Fetal Medicine and Genetics Dr. Stewart presents the potential benefits and obvious limitations of ultrasound in the detection of various fetal chromosomal abnormalities. 0889-8545 04 - see front matter 2004 Elsevier Inc. All rights reserved. doi xii . Simpson Obstet .

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