Transabdominal scanning of the cervix at the 20-week morphology scan: Comparison with transvaginal cervical measurements in a healthy nulliparous population.

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dc.contributor.author Stone, Peter en
dc.contributor.author Chan, Eliza en
dc.contributor.author McCowan, Lesley en
dc.contributor.author Taylor, Rennae en
dc.contributor.author Mitchell, Jennifer en
dc.date.accessioned 2011-11-07T20:14:30Z en
dc.date.issued 2010-12 en
dc.identifier.citation Australia New Zealand Journal of Obstetrics and Gynaecology 50(6):523-527 2010 en
dc.identifier.issn 0004-8666 en
dc.identifier.uri http://hdl.handle.net/2292/8760 en
dc.description.abstract Background:  Healthy, nulliparous women at low risk for preterm birth would not usually undergo transvaginal scanning at the 20-week morphology scan. The study aimed to determine whether transabdominal cervical measurement would be sufficient to exclude a short cervix in this population. Aims:  To investigate the relationship between transabdominal (TA) and transvaginal (TV) ultrasound measurements of the cervix at 20 weeks’ gestation. Methods:  At 20 weeks’ gestation, TA and TV cervical length was measured in 203 healthy nulliparous participants in the Screening for Pregnancy Endpoints (SCOPE) study. The TA and TV measurements were correlated and examined for variance. Results:  Paired measurements were achieved in 203 cases. The shortest cervical length on TV scanning was 22 mm, the longest was 59 mm, with TA equivalents of 21 mm and 56 mm respectively. The mean TV cervical length was 39.1 (SD 6.2) mm and mean TA 36.6 (SD 5.8) mm. The average difference between the measurements was 2.6 (SD 5.2) mm, the TA length being the shorter of the two. A TA on the 25th percentile (33 mm length) was associated with a 25th percentile TV length of 36 mm. The intraclass correlation coefficient between TV and TA measurements was 0.77, but the actual difference between the two measurements was not constant. Conclusions:  Transabdominal measurements are consistently less than TV measurements. As the measurements are correlated, TA scanning could be used to assess cervical length in most cases initially. Where the TA length is <5th percentile (27 mm), this measure could be used as an indication to perform a TV scan as this correlates with a 5th percentile TV measurement of 28 mm. en
dc.description.uri https://catalogue.library.auckland.ac.nz/primo-explore/fulldisplay?docid=uoa_alma21152757770002091&context=L&vid=NEWUI&search_scope=Combined_Local&tab=books&lang=en_US en
dc.language EN en
dc.publisher WILEY-BLACKWELL PUBLISHING, INC en
dc.relation.ispartofseries Australian and New Zealand Journal of Obstetrics and Gynaecology en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0004-8666/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.subject cervical length measurement en
dc.subject cervix uteri en
dc.subject premature birth en
dc.subject prenatal ultrasonography en
dc.subject LOWER UTERINE SEGMENT en
dc.subject PREMATURE DELIVERY en
dc.subject ULTRASOUND en
dc.subject LENGTH en
dc.subject PREGNANCY en
dc.subject SONOGRAPHY en
dc.title Transabdominal scanning of the cervix at the 20-week morphology scan: Comparison with transvaginal cervical measurements in a healthy nulliparous population. en
dc.type Journal Article en
dc.identifier.doi 10.1111/j.1479-828X.2010.01225.x en
pubs.issue 6 en
pubs.begin-page 523 en
pubs.volume 50 en
dc.rights.holder Copyright: 2010 The Authors Australian and New Zealand Journal of Obstetrics and Gynaecology 2010 The Royal Australian and New Zealand College of Obstetricians and Gynaecologists en
dc.identifier.pmid 21133862 en
pubs.author-url https://obgyn.onlinelibrary.wiley.com/doi/abs/10.1111/j.1479-828X.2010.01225.x en
pubs.end-page 527 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 174370 en
pubs.org-id Medical and Health Sciences en
pubs.org-id School of Medicine en
pubs.org-id Obstetrics and Gynaecology en
dc.identifier.eissn 1479-828X en
pubs.record-created-at-source-date 2010-11-09 en
pubs.online-publication-date 2010-09-16 en
pubs.dimensions-id 21133862 en


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