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Biomedical subjects

A Zorzoli

Publications and source records attributed to A Zorzoli.

15 recordsLinked to original sources
PubMed1992

Transvaginal sonography for fetal measurement in early pregnancy.

OBJECTIVE: To establish reference ranges for fetal size by gestation in the first trimester as indicated by cephalic, abdominal and limb measurements using transvaginal sonography. DESIGN: A prospective descriptive study. SETTING: Two antenatal clinics in Milan, Italy. SUBJECTS: 270 women with normal singleton pregnancies at 42-108 days gestation. All had regular cycles and certain dates. INTERVENTIONS: Vaginal ultrasound examination including inspection of fetal structures and lasting 5-15 min. MAIN OUTCOME MEASURES: As many of the following fetal measurements as possible according to gestational age and ease: crown-rump length (CRL), biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), femur and foot lengths. RESULTS: CRL was measured in 183 fetuses, BPD in 201, HC in 162, AC in 160, femur length in 133 and foot length in 62. The best description of the relation of CRL to gestational age was achieved by a quadratic function (y = -3.98 - 0.308x + 0.0117x2). Mean values thus derived were virtually identical to those obtained by Robinson & Fleming in 1975 with transabdominal static scanning. Fetal BPD, HC, AC and femur length correlated more closely with CRL than gestational age. Reference ranges (mean and 95% data intervals) were constructed for each biometrical measurement in relation to gestational age and CRL. The HC/AC and femur/foot length ratios did not show any significant variation with gestational age or CRL. CONCLUSIONS: These data may be useful in the early detection of genetic disorders affecting the growth of fetal head, trunk and limbs. Genetic and/or environmental variables play an appreciable role in the modulation of early fetal growth.

Abdomen↗
PubMed1987

Fitting growth curves to head and abdomen measurements of the fetus: a multicentric study.

Three different mathematical models were fitted to ultrasonic measurements of the biparietal diameter, head circumference, and abdomen circumference obtained from 1,426 healthy fetuses. The linear cubic function gives coefficients comparable with most previous studies, but it does not thoroughly explain fetal growth throughout pregnancy. Both the exponential-power function and the logistic-logarithmic function fit the raw data well and theoretically reflect the biological phenomena of human fetal growth. The characteristics of each model are discussed.

Abdomen↗
PubMed1983

Quantitative characterization of the growth of the fetal kidney.

The time-dependent changes in the antero-posterior (A-P) diamter and length (L) of fetal kidneys has been evaluated by means of statistical analysis of measurements made during the third trimester in a normal population. Two hundred eighty pregnant women were examined between 22 and 40 weeks of gestation. Differences between operator-scanner combinations were evaluated. The relationships of the A-P diameter and length to menstrual age were determined in cross-sectional and longitudinal studies of kidney growth. The results obtained confirmed that measurements of fetal kidney can be used as an additional parameter in the routine assessment of fetal well being and to rule out kidney malformations characterized by changes in kidney size.

Female↗
PubMed1983

[Prenatal diagnosis of a case of familial recurrence of unilateral diaphragmatic agenesis].

Prenatal diagnosis of different fetal malformations have been performed by echography. The authors report a case of recurrence of monolateral diaphragmatic agenesy in sibs. The diagnosis was achieved at the 23 degrees week of gestation. Some methodological details are also proposed to improve the possibility of early diagnosis. Embryological and epidemiological data have been evaluated.

Adult↗
PubMed1969

Gluconeogenesis in developing rat kidney cortex.

1. Gluconeogenesis in developing rat kidney cortex was studied by assaying the activities of two enzymes, glucose 6-phosphatase and phosphoenolpyruvate carboxykinase, and by measuring glucose formation in tissue slices. 2. Glucose 6-phosphatase and phosphoenolpyruvate carboxykinase are present in late foetal (21-22-day-old) tissue and increase rapidly postnatally. Maximum activity of phosphoenolpyruvate carboxykinase occurs at 7 days of age, followed by a decline to the adult level. Glucose 6-phosphatase activity rises during the first 2 postnatal weeks and then declines. 3. Late foetuses synthesize glucose from both pyruvate and l-glutamate. The rate increases during the first 2 weeks to above adult levels. Synthesis is always higher from pyruvate than from glutamate. 4. The effect of 24hr. starvation was studied in perinatal animals. The results indicate that the ability to increase the rate of glucose synthesis as a result of starvation is not present at birth, but develops some time after the second postnatal day.

Age Factors↗
PubMedDate not supplied

[Analysis of the performance of several technicians in the echographic evaluation of the uterus].

The reproducibility degree in echographic biometry of uterus, studied by three diameters (longitudinal, transverse and antero-posterior), is mainly influenced by the anatomic characteristics of the structures. Starting from this observation a study about if and how much the understanding difficulties can influence differently the evaluation by four operators has been performed. Data, obtained from ten women, have been elaborated for appraising precision and accuracy of the four operators. Results show an almost univocal interpretation of the images and also that the data inhomogeneity in the less reproducible diameters valuation is caused by real difficulty in the interpretation of the pictures.

Evaluation Studies as Topic↗