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Results 451 - 500 of 1246
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Mongelli M - - 2003
PURPOSE: To investigate the accuracy of ultrasound dating formulae in the late second trimester of pregnancy. MATERIAL AND METHODS: A dataset of 136 singleton pregnancies conceived by artificial reproductive techniques was studied to assess the accuracy of ultrasound dating formulae in the late second trimester, and compared with early second ...
Salomon L J - - 2003
INTRODUCTION: Although advances in ultrasound have facilitated the diagnosis of fetal abnormalities in the first trimester, fetal biometry at this stage of pregnancy remains underused in prenatal diagnosis. We hypothesized that charts which directly correlate measurements to crown-rump length (CRL) could be more accurate than those based on gestational age ...
Iams Jay D - - 2003
When extremely preterm birth is anticipated, a reliable estimate of neonatal outcome is essential for the parents and health care providers who face difficult management decisions. Estimates of birth weight and gestational age are most commonly used for this purpose. The National Institute of Child Health and Human Development Maternal-Fetal ...
Yeo Lami - - 2003
OBJECTIVE: To determine the usefulness of a fetal ear length nomogram in the prenatal detection of fetal aneuploidy and to determine whether ear smallness in cases of aneuploidy is a primary or secondary event. METHODS: Ear lengths of 447 singleton fetuses (October 1996 to October 1997)were prospectively evaluated between 14 ...
Serhatlioglu Selami - - 2003
PURPOSE: Absence of the cavum septum pellucidum (CSP), the cisterna magna (CM), or both, and enlargement of either or both structures are associated with various central nervous system malformations. In an effort to determine normal sizes and relationships between these cranial structures, we measured the CSP and CM in normal ...
Henrichs Christine - - 2003
OBJECTIVE: To determine if abdominal circumference (AC) can identify macrosomia (> or = 4,000 g) at or beyond 37 weeks. STUDY DESIGN: Prospectively, parturients at term admitted for delivery underwent sonographic mensuration of AC. A receiver-operating characteristic (ROC) curve was constructed to determine if AC can differentiate between normal (birth ...
Figueras Francesc - - 2003
OBJECTIVE: To evaluate the relative prognostic value of ultrasound findings during the first-trimester scan by univariate and logistic regression analysis in a group of asymptomatic women. STUDY DESIGN: A total of 125 asymptomatic pregnant women with a singleton conceptus, concordance between menstrual age and crown-rump length, and documented fetal activity, ...
Chang Chiung-Hsin - - 2003
Accurate assessment of the fetal organ volumes is very important in the evaluation of fetal well-being and maturation. Previous investigators have pointed out that fetal thigh volume (ThiV) may be a useful predictive factor of intrauterine growth retardation. Yet, 2-D ultrasound (US) is limited in assessing fetal ThiV accurately. With ...
Mayhew Terry M - - 2003
Patterns of fetoplacental angiogenesis and villous growth vary in pregnancies complicated by different forms of fetal hypoxia. This study uses stereological estimators to examine absolute and relative dimensions of villi and fetal capillaries in cases of preplacental hypoxia due to pregnancy at high altitude. Placental samples were drawn from well-defined ...
Fok T F - - 2003
OBJECTIVES: To provide a database of the canthal measurements of Chinese infants born in Hong Kong. DESIGN: Prospective cross-sectional study. SETTING AND SAMPLE POPULATION: A total of 2,371 healthy singleton, born consecutively at the Prince of Wales Hospital and the Union Hospital from June 1998 to June 2000, were included ...
Nahum Gerard G - - 2003
OBJECTIVE: The purpose of this study was to investigate the accuracy of 25 ultrasonic algorithms for the estimation of term fetal weight and to compare these results to an equation that is based on maternal and pregnancy-specific characteristics alone. STUDY DESIGN: Ultrasonography was performed in 82 nondiabetic gravid women at ...
Zalel Y - - 2003
OBJECTIVE: To construct a normal range for the internal diameter of the fetal descending colon and rectum during gestation. SUBJECTS AND METHODS: This was a prospective, cross-sectional study including 379 healthy pregnant women with normal singleton pregnancies at 19-40 weeks of gestation. Measurements of the fetal descending colon (maximum internal ...
Hansen Katrine - - 2003
To establish accurate reference ranges for the entire second trimester, we documented organ weights, body weight, and linear measurements for 597 fetuses and neonates with gestational ages ranging from 12 to 26 wk. We determined the mean and standard deviation for weights and measurements at each week of gestation using ...
Falco P - - 2003
OBJECTIVE: This was a prospective observational cohort study to evaluate the outcome and prognostic criteria of pregnancies with first-trimester bleeding and a gestational sac <or=16 mm without a demonstrable embryo. METHODS: Criteria for admission into the study included: (1) first-trimester bleeding; (2) a transvaginal scan performed upon admission demonstrating a ...
Poutanen T - - 2003
Modern echocardiographic techniques allow precise measurements of interventricular septum thickness by two-dimensional echocardiography (2DE) and M-mode echocardiography. The advantage of 2DE is the more accurate estimate in cases in which the shape of the septum differs from normal. However, the usefulness of measurements by 2DE is limited due to the ...
von Kaisenberg C S - - 2002
OBJECTIVE: To establish comprehensive transabdominal ultrasonographic reference ranges for viable normal singleton human fetuses at 11-14 weeks' gestation. METHODS: Single transabdominal ultrasound measurements were taken once per pregnancy at a gestational age of between 11+0 and 14+0 weeks (crown-rump length, 45-84 mm), in viable singleton fetuses with nuchal translucency < ...
Herrera Emilio A - - 2002
Sixty-three pregnant llamas of known breeding date were used in this study. Forty-six of them were submitted to surgery between 186 and 320 days of gestation (52-91% of average gestation period, respectively). Under general anesthesia their fetuses were exteriorized and fetal weight (W), biparietal diameter (BPD) and femoral (F), tarsus-hoof ...
Surányi Andrea - - 2003
The object of this study was to investigate the fetal biparietal diameter/kidney length ratio in normal and hyperechogenic kidneys during the 3rd trimester of gestation. Screened pregnancies were chronically hypoxic [i.e. intrauterine growth retardation (IUGR)]. Depending on the renal manifestation of the intrauterine chronic hypoxia, the cases were divided into ...
Zalel Yaron - - 2002
OBJECTIVES: To establish a nomogram for early fetal kidney development during early gestation. METHODS: The study is a prospective, cross-sectional evaluation of 275 male and female fetuses between 13 and 22 weeks in normal singleton pregnancies. Measurements of fetal kidney length were performed by high resolution transvaginal ultrasonography between 14 ...
Figueras Francesc - - 2002
OBJECTIVE: To establish normal reference intervals for biparietal diameter, head circumference, abdominal circumference, and length of femur, a cross-sectional study. STUDY DESIGN: Five hundred singleton fetuses for each week at gestations between 23 and 41 weeks with a total of 9500 fetuses. Antenatal ultrasound measurements from all consecutive pregnant women ...
Karunasekera K A W - - 2002
The aim of the present study was to determine the accuracy of postnatal gestational age assessment of babies using three different methods. Two hundred women attending the university obstetric unit of North Colombo Teaching Hospital, Ragama, Sri Lanka whose expected date of delivery (EDD) by early ultrasonography fell within a ...
Rosati Paolo - - 2002
OBJECTIVE: To construct reference ranges of orbital diameters, measured in early pregnancy by transvaginal sonography. METHODS: The study group consisted of 2717 fetuses of pregnant women referred to our center and examined by transvaginal ultrasound between 11-16 week's gestation. Nomograms with confidence intervals (5th and 95th percentile) for each orbital ...
Chen Chih-Ping - - 2002
OBJECTIVES: Although most cases of Sotos syndrome are sporadic, familial cases have been described. In familial cases, the most likely mode of inheritance is autosomal dominant with variable expressivity. We present the perinatal imaging findings of an inherited case. CASE: This was the second pregnancy of a 32-year-old woman with ...
Ratanasiri Thawalwong - - 2002
OBJECTIVE: To compare the accuracy of ultrasonic fetal weight estimation using the Hadlock's, Shepard's, Tongsong's and Hansmann's equations. MATERIAL AND METHOD: The analytical-cross sectional study was conducted on 102 pregnant women who were admitted for delivery in the Labor Room at Srinagarind Hospital, Faculty of Medicine, Khon Kaen University between ...
De Biasio P - - 2002
OBJECTIVES: The aim of the study was to evaluate spine length as an indicator of skeletal growth in the first trimester of pregnancy and to provide a nomogram of spine length at the end of the first trimester of pregnancy. METHODS: The study was carried out on 420 single pregnancies, ...
Oh J S - - 2002
OBJECTIVE: To determine whether transvaginal sonographic measurement of gestational sac diameter in pregnancies 28-42 days from the last menstrual period can predict whether a pregnancy results in a normal term birth or a spontaneous miscarriage. DESIGN: Gestational sac diameter was measured during the 4th and 5th weeks of gestation from ...
Pinar Halit - - 2002
The transverse cerebellar diameter (TCD) is well established in the ultrasound literature as a reliable parameter for estimating the duration of gestation. In cases of growth restriction the cerebellum is usually spared, making TCD a reliable indicator of gestational age even when other parameters fall off the appropriate growth curve. ...
Husein Murad - - 2002
OBJECTIVE: The aim of the study was to evaluate the efficacy of ultrasonography and videobronchoscopy in measuring the subglottic diameter in the paediatric population. DESIGN: A double-blinded, prospective clinical study carried out at the Montreal Children's Hospital, McGill University. METHODS: Children undergoing non-life-threatening bronchoscopy for various reasons had the subglottic ...
Goldstein Israel - - 2002
OBJECTIVE: To characterize normal growth of the fetal fourth ventricle on ultrasonography throughout pregnancy. METHODS: Consecutive biometric measurements and fetal organ scans were obtained from 299 patients undergoing fetal anatomic surveys between 13 and 40 weeks' gestation. Using 7- and 3.5-MHz transducers for early (13- to 17-week) and late (>17-week) ...
Chitty Lyn S - - 2002
OBJECTIVE: To construct new size charts for all fetal limb bones. DESIGN: A prospective, cross sectional study. SETTING: Ultrasound department of a large hospital. SAMPLE: 663 fetuses scanned once only for the purpose of the study at gestations between 12 and 42 weeks. METHODS: Centiles were estimated by combining separate ...
Ong Stephen - - 2002
OBJECTIVE: To create twin centile charts for size. DESIGN: Retrospective study. SETTING: Aberdeen Maternity Hospital. METHODS: Ultrasound measurements of abdominal circumference (AC), biparietal diameter (BPD) and femur length (FL) for 1,011 twin pregnancies were extracted from a databank. The methodology is based on that described by Altman and Chitty [Br. ...
Gull I - - 2002
OBJECTIVES: To assess the contribution of additional examiners to: the average discrepancy between estimated and actual fetal weights; the correlation between estimated and actual fetal weights; the reduction in major (> 10%) discrepancies between estimated and actual fetal weights. DESIGN: Three experienced sonographers independently measured fetal biparietal diameter, head circumference, ...
Chang Chiung-Hsin - - 2002
Fetal upper arm volume (UAV) is closely related to fetal growth and nutrition status. In the past, 2-D ultrasound (US) has shown limitations in assessing fetal UAV. With the recent advancement of 3-D US, the limitation in assessing fetal UAV by 2-D US can be overcome. To establish a reference ...
Riegel Thomas - - 2002
OBJECTIVE: Hemorrhage control in endoscopic neurosurgery is critical because of the lack of suitable instruments for coagulation. One reason for this problem is that miniaturization of the instruments is still a technical problem. In this article, we present a solution: the use of bipolar microforceps with a small diameter of ...
Acharya G - - 2002
OBJECTIVE: The aim of this study was to perform three-dimensional ultrasound volumetry of intrauterine contents in cases of normal and failed pregnancies and correlate these with conventional two-dimensional measurements. METHODS: This was a cross-sectional observational study. Three-dimensional volumetric data were collected from a total of 111 patients with first-trimester singleton ...
Ronalds G - - 2002
BACKGROUND: Epidemiological studies showing that impaired fetal growth has long-term adverse health consequences have depended on crude measures of fetal growth such as overall weight or length. For future studies, there is a need to develop improved morphological markers of fetal growth which persist into adult life. Recent studies have ...
Konje J C - - 2002
OBJECTIVE: To evaluate the application of kidney length measurement to the determination of gestational age between the 24th and 38th weeks and to compare its accuracy with that of other fetal biometric indices. STUDY DESIGN: Seventy-three women with singleton uncomplicated pregnancies underwent standard ultrasound fetal biometry and kidney length measurement ...
Tovbin J - - 2002
OBJECTIVE: To construct prenatal age-specific reference intervals for measurement of five digits in normal fetuses. PATIENTS AND METHODS: Prospective cross-sectional study of fetuses assessed at an antenatal ultrasound unit in a university-affiliated general hospital. The study cohort comprised 302 pregnant women attending our clinic for routine fetal biometry or anomaly ...
De Biasio P - - 2002
OBJECTIVES: To calculate reference ranges for fetal limb measurements obtained by transabdominal ultrasound at 10-14 weeks of gestation. METHODS: Six hundred and six normal fetuses were examined transabdominally in a cross-sectional study by a single observer. The crown-rump length of the fetuses ranged from 31 to 78 mm. Measurement of ...
Degani S - - 2002
OBJECTIVE: To construct nomograms for cranial base parameters of normal fetuses. STUDY DESIGN: A cross-sectional study of 386 normal singleton fetuses at 14-40 weeks' gestation. Measurements of the length and width of the sphenoid bone anteriorly and the otic cartilage posteriorly and of the angles between the ridges were obtained. ...
Sase M - - 2002
OBJECTIVE: The aim of this observational study was to construct an ultrasound index of fetal gastric size for the prenatal detection of congenital digestive tract obstruction. SUBJECTS: A total of 386 fetal measurements were performed in routine ultrasonographic examinations of women with normal singleton pregnancies between 18 and 39 weeks ...
Zambelli D - - 2002
We ultrasonographically evaluated the prenatal development in cats, from the early phases to Day 30 of pregnancy, subjecting a group of pregnant cats (n = 12) to a daily ultrasonographic exam. The ultrasonographic images allowed us to measure the minor diameter of the gestational sac and the crown-rump length of ...
Kuno Atsushi - - 2002
OBJECTIVE: To assess the growth of the fetal liver in normal pregnancies and to evaluate the ability of fetal liver volume measurement for prediction of small-for-gestational-age fetuses. METHODS: Three-dimensional sonographic examinations were performed on 14 appropriate-for-gestational-age and 10 small-for-gestational-age fetuses. Liver volume and liver length were measured every 2 weeks ...
Dilmen G - - 2002
OBJECTIVES: To present normal lens and orbital measurement ranges by gestational age. METHODS: Three hundred and thirty-five women with uneventful pregnancies were evaluated from the 15th to the 40th week of gestation. Lens and orbital measurements were added to routine biometric measurements for normal fetuses. RESULTS: A strong linear correlation ...
Nomiyama M - - 2002
OBJECTIVE: To establish normal values for fetal aortic isthmus diameter in late gestation and to identify any changes in aortic isthmus dimensions and morphology in pathological conditions. METHODS: In this prospective study, the fetal aortic isthmus was evaluated in 110 low-risk pregnant women at between 30 and 40 weeks of ...
Rosati P - - 2002
OBJECTIVE: To propose new mathematical formulae to estimate fetal long bone biometry in early pregnancy and to establish their efficacy in comparison to previously constructed mathematical formulae. METHODS: A study population of 1960 singleton euploid fetuses was referred for transvaginal ultrasound examinations between 71 and 112 days of gestation prior ...
Zalel Yaron - - 2002
OBJECTIVES: To establish a nomogram for fetal thymus size during gestation. METHODS: The study is a prospective, cross sectional evaluation of 403 male and female fetuses between 14 and 38 weeks of normal singleton pregnancies. Measurements of fetal thymus size were performed by high resolution transvaginal ultrasonography between 14 and ...
Zalel Y - - 2002
OBJECTIVE: To establish a nomogram for fetal vermis measurements during gestation. METHODS: A prospective cross-sectional study of normal singleton pregnancies. Measurements of the fetal vermis width (in the axial plane) and height (in the sagittal plane) were performed by high-resolution transabdominal ultrasonography between 18 and 38 weeks of gestation in ...
Duncombe G J - - 2002
OBJECTIVE: To develop an ovine model of fetal bladder outflow obstruction and to investigate the effect on the kidney of surgical relief of the obstruction in the prenatal period. METHODS: Ultrasound examination and amniocentesis were performed on 68 date-bred pregnant ewes at day 57 of pregnancy (term = 150 days). ...
Noia G - - 2002
PURPOSE OF INVESTIGATION: The fetal-lamb model is a fundamental tool for developing clinical applications for the treatment of human fetal pathology (e.g., open fetal surgery). Accurate estimation of gestational age is important to avoid size-related problems during surgery. METHODS: To evaluate the effect of twinning on ovine fetal growth, we ...
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