Second trimester ultrasound scan
The second trimester scan is a routinely performed ultrasound examination on all pregnancies in many countries between 18 and 23 weeks of gestation. This scan emphasises on fetal anatomy and therefore is also called a second trimester anatomy scan, also known as 'fetal anomaly scan' or 'TIFFA (targeted imaging for fetal anomalies) scan'.
It usually assesses the following paramters
- fetal skull : integrity / shape
- fetal brain : ventricles, choroid plexusus, mid brain, posterior fossa
- fetal face : profile, orbits (including interocular diameter and binocular diameter), upper lip
- fetal neck : nuchal thickness
- fetal spine : transverse as well as longitudinal views
- fetal heart
- fetal thorax : thoracic shape, size, lungs, diaphragm
- fetal abdomen : stomach (including situs), liver, kidneys, bladder, abdominal wall, umbilicus
- fetal limbs : echogenicity, measurements, hands, movements
In addition to this, standard fetal biometric parameters as well as the following features are also assessed
This article is in need of some more references!
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- 1. Document from the Fetal medicine foundation : - www.fetalmedicine.com/fmf/18-23_Weeks_Scan.pdf
- 2. Document from SOGC Canada : - http://www.sogc.org/guidelines/documents/gui223CPG0903.pdf
Synonyms & Alternative Spellings
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|20 week anatomy scan||✓|