Sogc dating ultrasound guideline, date released
Determination of gestational age by ultrasound. By providing access to this patient information, it is not the intention of NGC to provide specific medical advice for particular patients. Methods Used to Formulate the Recommendations Expert Consensus Description of Methods Used to Formulate the Recommendations Not stated Cost Analysis Although no comprehensive cost benefit analysis has been done on routine early ultrasound for dating, the current literature suggests significant benefits are present.
There is good evidence to recommend against the clinical preventive action L.
A national algorithm for the assignment of gestational age may reduce practice variations across Canada for clinicians and researchers. Guideline Availability Electronic copies: There is good evidence to recommend the clinical preventive action B.
Dramatic results in uncontrolled experiments such as the results of treatment with penicillin in the s could also be included in this category III: Local institutions can dictate amendments to these opinions. Such reassignment may lead to the omission of appropriate—or the performance of inappropriate—fetal interventions.
Evidence from well-designed controlled trials without randomization II The patient information is not reviewed by NGC to establish whether or not it accurately reflects the original guideline's content.
The guideline was not adapted from another source. Using ultrasound-based gestational age assignment would also result in improved performance of prenatal screening programs.
Searches were updated on a regular basis and incorporated in the guideline to July 31, Potential Harms 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.
Qualifying Statements Qualifying Statements This document reflects emerging clinical and scientific advances on the date issued and is subject to change. None of these contents may be reproduced in any form without prior written permission of the Society of Obstetricians and Gynaecologists of Canada SOGC.
This patient information is intended to provide health professionals with information to share with their patients to help them better understand their health and their diagnosed disorders.
Evidence obtained from at least one properly randomized controlled trial II The information should not be construed as dictating an exclusive course of treatment or procedure to be followed.
There is fair evidence to recommend the clinical preventive action C. Rather we urge patients and their representatives to review this material and then to consult with a licensed health professional for evaluation of treatment options suitable for them as well as for diagnosis and answers to their personal medical questions.
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