| Placental thickness in the second trimester: a pilot study to determine the normal range. | |
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MedLine Citation:
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PMID: 22298864 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Objectives- We sought to determine the normal sonographically measured placental thickness in millimeters at the second-trimester scan (18 weeks to 22 weeks 6 days) and determine whether the measurement should be adjusted for gestational age and the placental site. Methods- We conducted a cross-sectional observational pilot study involving 114 consecutive patients with singleton pregnancies presenting for routine second-trimester sonography between 18 weeks and 22 weeks 6 days. Results- The unadjusted overall mean placental thickness was 24.6 (SD, 7.29) mm. The placental thickness was normally distributed. On multivariable analysis, the predicted mean thickness was 6.6 mm (95% confidence interval, 4.4 to 8.8 mm; P < .001) less in anterior compared to posterior or fundal placentas and increased by 0.6 mm (95% confidence interval, -0.5 to 1.7 mm; P = .27) for each week increase in gestation after 18 weeks Conclusions- The placental position and possibly gestational age need to be considered when determining placental thickness. Anterior placentas are approximately 7 mm thinner than posterior or fundal placentas. Anterior placentas of greater than 33 mm and posterior placentas of greater than 40 mm should be considered abnormally thick. |
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Authors:
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Anna J Lee; Michael Bethune; Richard J Hiscock |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine Volume: 31 ISSN: 1550-9613 ISO Abbreviation: J Ultrasound Med Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-02-02 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8211547 Medline TA: J Ultrasound Med Country: United States |
Other Details:
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Languages: eng Pagination: 213-8 Citation Subset: IM |
Affiliation:
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MBFRANZCOG, Royal Women's Hospital, Flemington Road, Parkville, VIC 3052, Australia., anna.lee.email@gmail.com. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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