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Sonographic fetal weight estimation in prolonged pregnancy: comparative study of two- and three-dimensional methods.

Lindell, G and Marsal, Karel LU (2009) In Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology 33. p.295-300
Abstract
OBJECTIVES: To compare two-dimensional (2D) and three-dimensional (3D) ultrasound techniques, including volumetry of fetal thigh, for fetal weight (FW) estimation in prolonged pregnancy, and to develop a new FW estimation formula. METHODS: This prospective comparative study initially included 176 pregnant women. FW estimation was performed at >/= 287 days of gestation within </= 4 days of delivery. Fetal head, abdomen and femur were measured using 2D ultrasound techniques, and fetal thigh volume was estimated using 3D techniques. The formula of Persson and Weldner (2D) was compared with two 3D formulae published by Lee and colleagues. In a subgroup of 63 fetuses, volumetry of the abdomen was performed and a new formula was developed;... (More)
OBJECTIVES: To compare two-dimensional (2D) and three-dimensional (3D) ultrasound techniques, including volumetry of fetal thigh, for fetal weight (FW) estimation in prolonged pregnancy, and to develop a new FW estimation formula. METHODS: This prospective comparative study initially included 176 pregnant women. FW estimation was performed at >/= 287 days of gestation within </= 4 days of delivery. Fetal head, abdomen and femur were measured using 2D ultrasound techniques, and fetal thigh volume was estimated using 3D techniques. The formula of Persson and Weldner (2D) was compared with two 3D formulae published by Lee and colleagues. In a subgroup of 63 fetuses, volumetry of the abdomen was performed and a new formula was developed; this formula was tested prospectively, along with the previously published formulae, on a further 50 women (Test Group). RESULTS: In the initial group of 176 pregnancies, the SD of the mean percentage error (MPE) was 6.3% for both the 2D Persson and Weldner formula and for the better performing 3D formula of Lee et al., but the MPE of this Lee formula differed significantly from zero. Significantly more FW estimations were within +/- 10% of the birth weight when the 2D formula was used than when the 3D formulae were applied. The new formula gave a SD of MPE of 5.6% when applied to the data from which it was derived. In the Test Group, the SD of MPE was similar for the 2D formula, the second formula of Lee et al. and the new formula, with values of 7.0, 7.0 and 7.1, respectively, but only the Persson and Weldner formula showed a MPE that did not differ significantly from zero. CONCLUSIONS: FW in prolonged pregnancies can be estimated using 2D sonography with the same accuracy as with 3D sonography. 3D ultrasound techniques require technically advanced and expensive equipment, special operator training and skills, and are time consuming. It does not seem reasonable to abandon the 2D ultrasound methods in favor of 3D ultrasound imaging for FW estimation. Copyright (c) 2009 ISUOG. Published by John Wiley & Sons, Ltd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology
volume
33
pages
295 - 300
publisher
John Wiley & Sons
external identifiers
  • WOS:000266505500007
  • PMID:19180582
  • Scopus:61849090949
ISSN
1469-0705
DOI
10.1002/uog.6281
language
English
LU publication?
yes
id
a964973f-42a6-42fe-9b26-4382464f52f7 (old id 1289169)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/19180582?dopt=Abstract
date added to LUP
2009-02-04 13:23:01
date last changed
2016-10-27 15:34:03
@misc{a964973f-42a6-42fe-9b26-4382464f52f7,
  abstract     = {OBJECTIVES: To compare two-dimensional (2D) and three-dimensional (3D) ultrasound techniques, including volumetry of fetal thigh, for fetal weight (FW) estimation in prolonged pregnancy, and to develop a new FW estimation formula. METHODS: This prospective comparative study initially included 176 pregnant women. FW estimation was performed at &gt;/= 287 days of gestation within &lt;/= 4 days of delivery. Fetal head, abdomen and femur were measured using 2D ultrasound techniques, and fetal thigh volume was estimated using 3D techniques. The formula of Persson and Weldner (2D) was compared with two 3D formulae published by Lee and colleagues. In a subgroup of 63 fetuses, volumetry of the abdomen was performed and a new formula was developed; this formula was tested prospectively, along with the previously published formulae, on a further 50 women (Test Group). RESULTS: In the initial group of 176 pregnancies, the SD of the mean percentage error (MPE) was 6.3% for both the 2D Persson and Weldner formula and for the better performing 3D formula of Lee et al., but the MPE of this Lee formula differed significantly from zero. Significantly more FW estimations were within +/- 10% of the birth weight when the 2D formula was used than when the 3D formulae were applied. The new formula gave a SD of MPE of 5.6% when applied to the data from which it was derived. In the Test Group, the SD of MPE was similar for the 2D formula, the second formula of Lee et al. and the new formula, with values of 7.0, 7.0 and 7.1, respectively, but only the Persson and Weldner formula showed a MPE that did not differ significantly from zero. CONCLUSIONS: FW in prolonged pregnancies can be estimated using 2D sonography with the same accuracy as with 3D sonography. 3D ultrasound techniques require technically advanced and expensive equipment, special operator training and skills, and are time consuming. It does not seem reasonable to abandon the 2D ultrasound methods in favor of 3D ultrasound imaging for FW estimation. Copyright (c) 2009 ISUOG. Published by John Wiley &amp; Sons, Ltd.},
  author       = {Lindell, G and Marsal, Karel},
  issn         = {1469-0705},
  language     = {eng},
  pages        = {295--300},
  publisher    = {ARRAY(0x4f321d8)},
  series       = {Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology},
  title        = {Sonographic fetal weight estimation in prolonged pregnancy: comparative study of two- and three-dimensional methods.},
  url          = {http://dx.doi.org/10.1002/uog.6281},
  volume       = {33},
  year         = {2009},
}