Descriptive growth model of the height of stapes in the fetus: a histopathological study of the temporal bone.

摘要: Temporal bone histological findings can be evaluated from several points of view. The most basic consists a description the characteristics and abnormalities particular temporal bones. second one is measurement various structures in larger set bones monitoring these over time. height stapes was measured 40 27 fetuses, growth 13th to 36th weeks pregnancy determined. A computer-assisted nonlinear regression analysis diagnostics enabling simultaneous examination data (influential points, i.e., outliers leverages) carried out, curve model proposed mathematical method with Ratkowski criteria for estimation applied find best descriptive versus time y=f(x) curve; results 13 models were examined. It found that maximum between 24th pregnancy. average 1.05 mm week 2.6 week. Later, after 25th week, slower, 30th 3.0 mm.