Using ultrasound measurements of the femur, tibia, humerus, radius (N = 515), and fibula and ulna (N = 385) from normal fetuses between 12 and 40 completed weeks of gestation, growth models were determined for each bone by computer analysis. On the basis of residual analysis, growth of fetal limb bo
Mathematical modeling of fetal splenic growth: Use of the rossavik growth model
β Scribed by Toshiyuki Hata; Russell L. Deter; Showa Aoki; Ken Makihara; Kohkichi Hata; Manabu Kitao
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 406 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0091-2751
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β¦ Synopsis
Abstract
Growth of the fetal spleen has been monitored by measurements of the maximal length (SL), profile circumference (SC), and profile area (SA) of the spleen, from 20 weeks to 41 weeks, menstrual age. Growth curves for these parameters have been determined using a specially developed growth curve model [P = c(t)^k + s (t)^]. R^2^ values of 94.3%, 94.9%, and 96.3% were obtained for SL, SC, and SA, respectively. Variability analysis indicated some progressive increase in variability with menstrual age for these three parameters. Variability data were used with the growth curve models to determine standard curves for SL, SC, and SA. These standard curves provide a superior means for evaluating the normal splenic growth in the fetus and for identifying splenic abnormalities in utero.
π SIMILAR VOLUMES
Quantitative characterization of fetal growth requires the selection of measurement parameters and a growth curve model. For such studies we propose two new parameters (the head cube and the abdominal cube) and a new growth curve model [P = c(t)k+s(t)]. These parameters are relatively insensitive to
Fetal growth after 37 weeks menstrual age was investigated by compar- ing ultrasound estimates of fetal weight with corresponding weights of newborns. Using a weight estimation equation with minimal systematic error, evidence was found that fetuses delivered a t term do not increase in weight the la
Growth of the fetal abdomen has been reexamined in a longitudinal study of 32 normally growing fetuses using the abdominal profile area (AA) and the Rossavik growth model. The growth of the fetal abdomen was compared to that of the fetal head. In early pregnancy the growth rate was higher for the f
Objectives: To evaluate the Rossavik growth model for predicting birth weight in a Dutch population and to evaluate growth cessation near term. Study Design: Birth weight was predicted at various ages between 38 and 42 weeks, menstrual age (MA), and at birth age in 50 normal infants using two sets