Determination of Gestational Age by Ultrasound

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  • معلومة اضافية
    • Affiliation:
      Vancouver BC
      Ottawa ON
      Fredericton NB
      Ottawa ON
      Kingston ON
      Saskatoon SK
      Winnipeg MB
      Montreal QC
      Sherbrooke QC
      Toronto, ON
      Fredericton NB
      Vancouver BC
    • Note:
      This clinical practice guideline has been prepared by the Diagnostic Imaging Committee, reviewed by the Family Physician Advisory Committee, and approved by the Executive and Council of the Society of Obstetricians and Gynaecologists of Canada.
      Disclosure statements have been received from all contributors.
      This document reflects emerging clinical and scientific advances on the date issued and is subject to change. The information should not be construed as dictating an exclusive course of treatment or procedure to be followed. Local institutions can dictate amendments to these opinions. They should be well documented if modified at the local level. None of these contents may be reproduced in any form without prior written permission of the SOGC.
    • Keywords:
      ultrasound
      gestational age
      dating
    • Abstract:
      Objective To assist clinicians in assigning gestational age based on ultrasound biometry.
    • Abstract:
      Evidence Published literature was retrieved through searches of PubMed or MEDLINE and The Cochrane Library in 2013 using appropriate controlled vocabulary and key words (gestational age, ultrasound biometry, ultrasound dating). Results were restricted to systematic reviews, randomized control trials/controlled clinical trials, and observational studies written in English. There were no date restrictions. Searches were updated on a regular basis and incorporated in the guideline to July 31, 2013. Grey (unpublished) literature was identified through searching the websites of health technology assessment and health technology-related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical specialty societies.
    • Abstract:
      Values The quality of evidence in this document was rated using the criteria described in the Report of the Canadian Task Force on Preventive Health Care (Table 1).
    • Abstract:
      Benefits, harms, and costs Accurate assignment of gestational age may reduce post-dates labour induction and may improve obstetric care through allowing the optimal timing of necessary interventions and the avoidance of unnecessary ones. More accurate dating allows for optimal performance of prenatal screening tests for aneuploidy. A national algorithm for the assignment of gestational age may reduce practice variations across Canada for clinicians and researchers. Potential harms include the possible reassignment of dates when significant fetal pathology (such as fetal growth restriction or macrosomia) result in a discrepancy between ultrasound biometric and clinical gestational age. Such reassignment may lead to the omission of appropriate—or the performance of inappropriate—fetal interventions.
    • ISSN:
      1701-2163
    • Accession Number:
      10.1016/S1701-2163(15)30664-2
    • Accession Number:
      S1701216315306642
    • Copyright:
      Copyright © 2014 Society of Obstetricians and Gynaecologists of Canada Published by Elsevier Inc. on behalf of Society of Obstetricians and Gynaecologists of Canada All rights reserved.
  • Citations
    • ABNT:
      LIM, K. et al. Determination of Gestational Age by Ultrasound. Journal of Obstetrics and Gynaecology Canada, [s. l.], v. 36, n. 2, p. 171–181, 2014. Disponível em: . Acesso em: 15 set. 2019.
    • AMA:
      Lim K, Bly S, Butt K, et al. Determination of Gestational Age by Ultrasound. Journal of Obstetrics and Gynaecology Canada. 2014;36(2):171-181. doi:10.1016/S1701-2163(15)30664-2.
    • APA:
      Lim, K., Bly, S., Butt, K., Cargill, Y., Davies, G., Denis, N., … Lim, K. (2014). Determination of Gestational Age by Ultrasound. Journal of Obstetrics and Gynaecology Canada, 36(2), 171–181. https://doi.org/10.1016/S1701-2163(15)30664-2
    • Chicago/Turabian: Author-Date:
      Lim, Ken, Stephen Bly, Kimberly Butt, Yvonne Cargill, Greg Davies, Nanette Denis, Gail Hazlitt, et al. 2014. “Determination of Gestational Age by Ultrasound.” Journal of Obstetrics and Gynaecology Canada 36 (2): 171–81. doi:10.1016/S1701-2163(15)30664-2.
    • Harvard:
      Lim, K. et al. (2014) ‘Determination of Gestational Age by Ultrasound’, Journal of Obstetrics and Gynaecology Canada, 36(2), pp. 171–181. doi: 10.1016/S1701-2163(15)30664-2.
    • Harvard: Australian:
      Lim, K, Bly, S, Butt, K, Cargill, Y, Davies, G, Denis, N, Hazlitt, G, Morin, L, Ouellet, A, Salem, S, Butt, K & Lim, K 2014, ‘Determination of Gestational Age by Ultrasound’, Journal of Obstetrics and Gynaecology Canada, vol. 36, no. 2, pp. 171–181, viewed 15 September 2019, .
    • MLA:
      Lim, Ken, et al. “Determination of Gestational Age by Ultrasound.” Journal of Obstetrics and Gynaecology Canada, vol. 36, no. 2, Feb. 2014, pp. 171–181. EBSCOhost, doi:10.1016/S1701-2163(15)30664-2.
    • Chicago/Turabian: Humanities:
      Lim, Ken, Stephen Bly, Kimberly Butt, Yvonne Cargill, Greg Davies, Nanette Denis, Gail Hazlitt, et al. “Determination of Gestational Age by Ultrasound.” Journal of Obstetrics and Gynaecology Canada 36, no. 2 (February 1, 2014): 171–81. doi:10.1016/S1701-2163(15)30664-2.
    • Vancouver/ICMJE:
      Lim K, Bly S, Butt K, Cargill Y, Davies G, Denis N, et al. Determination of Gestational Age by Ultrasound. Journal of Obstetrics and Gynaecology Canada [Internet]. 2014 Feb 1 [cited 2019 Sep 15];36(2):171–81. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edselp&AN=S1701216315306642&custid=s8280428