Comparison of frontomaxillary facial angles using both 2D and 3D ultrasound at 11+0 to 13+6 weeks of gestation

Alphonse, Jennifer, Cox, Jennifer, Clarke, Jill, Schluter, Philip J. and McLennan, Andrew (2010) Comparison of frontomaxillary facial angles using both 2D and 3D ultrasound at 11+0 to 13+6 weeks of gestation. Fetal Diagnosis And Therapy, 28 1: 14-21.


Author Alphonse, Jennifer
Cox, Jennifer
Clarke, Jill
Schluter, Philip J.
McLennan, Andrew
Title Comparison of frontomaxillary facial angles using both 2D and 3D ultrasound at 11+0 to 13+6 weeks of gestation
Journal name Fetal Diagnosis And Therapy   Check publisher's open access policy
ISSN 1015-3837
Publication date 2010-07
Sub-type Article (original research)
DOI 10.1159/000313638
Volume 28
Issue 1
Start page 14
End page 21
Total pages 8
Place of publication Basel, Switzerland
Publisher S Karger AG
Collection year 2011
Language eng
Subject 920203 Diagnostic Methods
111006 Midwifery
Formatted abstract Introduction:
The aim of this study is to (i) directly compare both two-dimensional (2D) and three-dimensional (3D) frontomaxillary facial angle (FMFA) in first trimester, and (ii) to assess the ease with which both may be performed.

Materials and Methods:
Both 3D volumes of the fetal head and 2D fetal profiles were collected from 251 consenting patients during routine first-trimester nuchal translucency (NT) screening. The FMFA in 2D was measured at the time of the NT screening. The 3D FMFA was measured offline.

Results:

The 2D FMFA was systematically higher than the 3D FMFA. The difference in 3D–2D FMFA was statistically significant from 11+0 to 12+3 weeks. From 12+4 to 13+6 weeks the difference was no longer significant with p = 0.06. Performing the measurement did not unduly increase the time of the study. Even for the experienced sonographer the technique is technically difficult, relying on many factors for accurate caliper placement.

Discussion:
The 2D FMFA is greater than the 3D angle. This was found in previous studies, but not thought to be statistically significant. The difference decreased with increasing gestational age. There is a learning curve associated with performing this measurement. Normative data for both 2D and 3D, incorporating ethnicity, may be necessary before inclusion in the first-trimester algorithm.
Copyright © 2011 S. Karger AG, Basel
Keyword Facial angles, frontomaxillary
Ultrasound, 2D, 3D
Nuchal translucency
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Nursing and Midwifery Publications
 
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Created: Sun, 08 Aug 2010, 00:05:45 EST