| Discordant twins--a prospective study of the diagnostic value of real-time ultrasonography combined with umbilical artery velocimetry. | |
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MedLine Citation:
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PMID: 2675606 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study was undertaken to evaluate the role of Doppler velocimetry combined with intertwin differences in ultrasonographically derived estimated fetal weight, biparietal diameter, abdominal circumference, and femur length as a comprehensive test for the prediction of discordancy. The following cutoff values were used to indicate abnormal test results: delta biparietal diameter greater than 6 mm, delta abdominal circumference greater than 20 mm, delta femur length greater than 5 mm, delta estimated fetal weight greater than 15%, and delta systolic/diastolic ratio greater than 15%. Discordancy was identified when the birth weight difference exceeded 15%. The study population consisted of 58 consecutively evaluated third-trimester twin gestations. Eighteen sets of twins were discordant. None of these tests was uniformally successful in identifying twin discordancy; in three instances, all test results were normal. The diagnostic accuracy provided by ultrasonography was not significantly different from that provided by Doppler velocimetry. Overall the best predictor appeared to be the presence of either delta systolic/diastolic ratio greater than 15% or delta estimated fetal weights greater than 15%, which correctly identified 14 of the 18 discordant twins and misclassified only five of the 40 concordant pairs. This combination also had the highest positive and negative predictive values (73% and 90%, respectively). |
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Authors:
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M Y Divon; B A Girz; A Sklar; D A Guidetti; O Langer |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: American journal of obstetrics and gynecology Volume: 161 ISSN: 0002-9378 ISO Abbreviation: Am. J. Obstet. Gynecol. Publication Date: 1989 Sep |
Date Detail:
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Created Date: 1989-10-18 Completed Date: 1989-10-18 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0370476 Medline TA: Am J Obstet Gynecol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 757-60 Citation Subset: AIM; IM |
Affiliation:
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Department of Obstetrics and Gynecology, Albert Einstein College of Medicine, Yeshiva University, Bronx, NY. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Birth Weight Diseases in Twins* Embryonic and Fetal Development* Female Humans Predictive Value of Tests Pregnancy Pregnancy Trimester, Third Prenatal Diagnosis* Prospective Studies Ultrasonography* Umbilical Arteries / physiology* |
| Comments/Corrections | |
Comment In:
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Am J Obstet Gynecol. 1990 Sep;163(3):1100-1
[PMID:
2206061
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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