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PubMed1984

Fetal biometry and intrauterine growth retardation. Current concepts.

Monitoring fetal growth and detecting intrauterine growth retardation comprise a large percentage of the reasons for ultrasound examinations. Detecting intrauterine growth retardation can significantly reduce perinatal mortality and is facilitated by calculations of numerous fetal measurements.

Anthropometry↗
PubMed1981

[Biometry, data registration and data processing in rheumatology].

In the research of rheumatism there appear subjective, semiobjective and objective findings, by the combination of which criteria of activity, function and progression are recognized. Their qualitative criteria are described. Apart from an economically justifiable recording of data, in which regulations of codification and lists of recording of data are separated, the establishment of important statistical numbers of measure (mean value, standard deviation, variation coefficient) is described and explained, by which methods comparisons of groups (t-test after Student) for normally distributed measuring sizes, chi2-test for qualitative characteristics and categories and correlations (correlation coefficient after Bravais-Pearson, rank correlation after Spearman) are performed. The methods are described thus that they may be repeated ubiquitously and not only in the research of rheumatism, be it with or without electronic data processing devices. The factor analysis, which cannot be realised without using data processing, but by means of which we succeed in investigating its structural connections, is also explained. This is done with regard to the possible reduction of extensive laboratory investigation and the connected with this economic advantages.

Electronic Data Processing↗
PubMed1981

[Sonographic biometry of the fetus-crown-rump-length in the first half of pregnancy].

In 268 pregnant women with known duration of pregnancy the crown-rump-length of the fetus was measured by means of a real-time-scanner. For the period between week 7 + 0 to 20 + 0 normal curves are established. In addition the mean daily incremental rate is given. A maximum increment of 1,9 mm/day was found between week 12 + 0 and 13 + 0. The optimal date for the estimation of the gestational age is the early period between week 7 + 0 an 14 + 0. In this period the 96% confidential range (+/- 2 SD is +/- 7 days. To the end of the first half of pregnancy the precision of the estimation (+/- 2 SD) becomes worse (+/- 10 days). The fetal crown-rump-length could be measured in all cases from up week 7 + 0. Here we see a definite advantage of the real-time-scan-technic-in spite of a diminished precision of measuring - vs the compound-scan-technic.U

Female↗