View source for Dating Scan for increased risk from Maternal Serum Screening

<div class="WPC-editableContent">Ultrasound scanning guidelines<br/><br/><br/><table align="bottom" cellpadding="3" class="WPC-edit-style-border1 WPC-edit-border-none WPC-edit-styleData-color1=%23ebebeb&amp;color2=%23c7c7c7" width="100%"><tr><td class="WPC-edit-borderTop-solid WPC-edit-borderLeft-solid WPC-edit-borderBottom-solid WPC-edit-borderRight-solid" width="100%"><b><font size="4">Dating Scan for increased risk from maternal serum screening (MSS)<br/></font></b><h3> </h3><br/><ul><li>A scan may be requested after maternal serum screening (MSS) indicates an increased risk for chromosomal abnormalitiy (down syndrome, neural tube defect, abdominal wall defect)</li><li>Often performed about 16 weeks gestation (this is when MSS is performed)</li><li>The primary purpose of this scan is to provide accurate dates for the pregnancy</li><li>In addition to fetal biometry, a limited assessment of anatomy should be performed if there is an increased risk of NTD/abdominal wall defect<br/></li></ul><b>Assess:</b> <br/><ul><li>Fetal number</li><li>Fetal cardiac activity</li><li>Placental position</li><li>Liquor volume</li><li>Adnexae</li><li>Cervix</li><li>Fetal biometry<br/></li></ul><b>Documentation:</b><br/><ul><li>Placental views long / trans</li><li>Internal os view in the midline with a measurement to lower placental edge</li><li>Deepest pool of liquor with AP measurement <br/></li><li>Full length of fetal head and body</li><li>BPD, HC, AC, FL</li><li>Fetal heart in thorax / clipstore of fetal heart activity +/- M-mode</li></ul><b>Additional Documentation - for increased risk of NTD/abdominal wall defect on MSS</b><br/><ul><li>Fetal cord insertion</li><li>Coronal or sagittal views of the entire spine</li><li>Trans assessment of entire spine</li><li>Cerebellum / Cisterna Magna</li><li>Choroid plexus / lateral ventricle measurement at trigone</li></ul></td></tr></table><br/> [[Protocols|....Go back to ultrasound protocols homepage]]</div>