Search Results
Results 451 - 500 of 854
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Lobato E B - - 1999
OBJECTIVE: To compare the cross-sectional area (CSA) of the right internal jugular vein (RIJV) with the left internal jugular vein (LIJV) using two-dimensional ultrasound and to measure the response to the Valsalva maneuver in both the supine and Trendelenburg positions. DESIGN: Prospective and randomized. SETTING: University-affiliated hospital. PARTICIPANTS: Fifty healthy ...
Grechenig W - - 1999
PURPOSE OF THE STUDY: The aim of the study is to show the value and reliability of ultrasound examination in detecting free intraabdominal air after blunt abdominal trauma. METHODS: The experimental part of this study includes the evaluation of the sonographic morphology of air within liquid and solid tissues. Subsequently ...
Dudkiewicz I - - 1999
A 23-year-old woman, gravida 1 parity 0, was referred for routine ultrasound examination at 23 weeks gestation. Fetal anatomy was normal. However, both hands demonstrated clasped thumbs without extension. Repeated ultrasound examination verified the bilateral hands posture. The position of the hands did not change following sound stimulation. The child ...
Jensh R P - - 1999
During the past several decades, the use of ultrasound technology in the clinical setting has greatly increased. Because nearly every pregnant woman receives at least one sonographic procedure today, there has been developing concern about the safety of such procedures. Since ultrasound exposure can result in hyperthermia and other physiological ...
Ondero─člu L S - - 1999
We describe a case of fetal rhabdomyosarcoma detected during the third trimester of pregnancy by prenatal sonography. At 33 weeks' gestation, sonography performed because of suspected polyhydramnios showed a solid mass of 120 x 54 mm arising from the anterior wall of the fetal thoracic cage. Another mass within the ...
Chatzipapas I K - - 1999
OBJECTIVES: To assess the sonographic screening for anencephaly in the first trimester in a low-risk obstetric population. METHODS: Since 1994, 5388 women attended our clinic for a first-trimester scan (11-14 weeks of gestation) and screening for structural and chromosomal abnormalities. The patients underwent transabdominal scanning, and transvaginal scanning if necessary. ...
Roberts W E - - 1999
In this retrospective case control investigation, 51 pregnant patients who were diagnosed by ultrasound with uterine myomas were compared to 102 randomly selected control patients to determine if the ultrasound diagnosis of one or more leiomyoma is associated with increased untoward pregnancy outcomes compared to controls. Women with uterine myomas ...
Eurenius K - - 1999
BACKGROUND: To assess the sensitivity for detection of fetal anomalies by a second trimester ultrasound screening program performed in a way representative of a majority of Swedish obstetrical departments. The examinations were performed at the ultrasound division of the Department of Obstetrics and Gynecology at the University Hospital of Uppsala, ...
Isaksen C V - - 1999
OBJECTIVE: Detection of congenital heart defects by prenatal ultrasound examination has been one of the great challenges since the investigation for fetal anomalies became part of the routine fetal examination. This prospective study was designed to evaluate the concordance of prenatal ultrasound findings with autopsy examination in a population consisting ...
Kurjak A - - 1999
Diagnostic ultrasound has been used for many years with a remarkable history of safety during the standard clinical practice. Introduction of color and pulsed Doppler modes resulted with higher levels of transmitted and absorbed ultrasonic energy. This fact raised the question for the safety of its use in early pregnancy. ...
Persutte W H - - 1999
Advanced-practice (AP) ultrasonography by an AP sonographer or ultrasound practitioner is an emerging allied health profession. The efficacy of this professional in sonographic diagnosis has not been evaluated. This report describes a comparison of the efficacies of diagnosis using a traditional approach and diagnosis by the AP sonographer. Between 1991 ...
Angle B - - 1998
Smith-Lemli-Opitz (SLO) syndrome is an autosomal recessive disorder comprised of recognizable facial abnormalities, growth retardation, and multiple congenital anomalies, commonly involving genitalia, second and third toe syndactyly, and cleft palate. The condition is associated with hypocholesterolemia and elevated levels of 7-dehydrocholesterol (7DHC) resulting from deficient activity of the enzyme 7-dehydrocholesterol ...
Mongelli M - - 1998
OBJECTIVE: We estimated the effect of ultrasound error and time interval between examinations on the false-positive rate for detecting fetal growth restriction (FGR). METHODS: Using published growth curves for the fetal abdominal circumference and a coefficient of variation for ultrasound error of 5%, computer simulation was used to estimate false-positive ...
Wimsatt J - - 1998
The Siberian polecat (Mustela eversmanni) is the preferred species to assess procedures and establish normative values for application in the related and endangered black-footed ferret (Mustela nigripes). This study was undertaken to physically, ultrasonographically, and radiographically evaluate fetal development in a spontaneously breeding captive Siberian polecat population. Ultrasonographically, fetal sac ...
Hill L M - - 1998
Short-rib polydactyly dysplasia (SRP) is an autosomal recessive, lethal skeletal dysplasia. Sonographic assessment of subsequent pregnancies is, therefore, recommended. This case indicates that this diagnosis can be made in the latter part of the first trimester. A 30-year-old multigravid woman presented at 13 weeks' gestation for an ultrasound examination. She ...
Guariglia L - - 1998
OBJECTIVE: To evaluate the importance and evolution of isolated, mild fetal pyelectasis, detected in early pregnancy by high-resolution transvaginal sonography, and to determine its association with abnormal fetal karyotypes. METHODS: Transvaginal scan at 11-16 weeks' gestation and transabdominal ultrasound examinations at the time of amniocentesis (16-18 weeks) were performed in ...
Burgess I A - - 1998
Congenital cataracts can cause irreversible loss of sight unless surgery is performed soon after birth. In the case reported here an obstetric ultrasound detected congenital cataracts in an otherwise normal fetus without any history of familial syndrome, infection or metabolic disorder. The lens opacity was detectable on transabdominal ultrasound at ...
Lowe S W - - 1998
Ultrasound technology offers valuable information when used as a diagnostic tool during a pregnancy at risk for complications. Its use has expanded greatly to uncomplicated pregnancies as a result of expectant parents' desire to see their baby or to know its gender. Many women are having ultrasounds without being given ...
Ulm M R - - 1998
OBJECTIVE: A total of 126 genetic syndromes are associated with oligodontia or anodontia. The most frequent of these are ectodermal dysplasias, all types of facial cleft and Down's syndrome. With the advent of three-dimensional ultrasonography, accurate assessment of many fetal abnormalities has become possible. The objective of this study was ...
Quinlivan J A - - 1998
We present a case of congenital listeriosis in a twin pregnancy. Presentation was prompted by decreased fetal movements and an ultrasound examination which demonstrated features similar to those observed in an adult with inflammatory conditions of the bowel, namely, small amounts of ascites, dilated loops of bowel and thickening of ...
Bofill J A - - 1998
Most patients in the United States have an indication for and receive sonography during pregnancy. The issue of routine sonography for low-risk women continues to be contentious even though the randomized trials have not been able to demonstrate a clear benefit. Clinics that routinely offer sonography for all pregnancies usually ...
Antsaklis A J - - 1998
Routine ultrasound examination is defined as a screening procedure performed on the total obstetric population usually at 18-20 weeks of gestation as opposed to the selective use of ultrasound that might provide more information for a problem that is suspected on clinical grounds. Standard ultrasound examination includes a comprehensive examination ...
England G C - - 1998
Ultrasonographic imaging is widely used in small animal practice for the diagnosis of pregnancy and the determination of fetal number. Ultrasonography can also be used to monitor abnormal pregnancies, for example, conceptuses that are poorly developed for their gestational age (and therefore are likely to fail), and pregnancies in which ...
Levi S - - 1998
Results from ultrasound in low-risk pregnant women are significant when routine screening is performed on a large population because the anomalies are rare. Professionals expect from routine ultrasound objective information that cannot usually be obtained by clinical procedures. Parents seek reassurance about the absence of fetal congenital anomalies and overall ...
Romano P S - - 1998
Decision analysis is a widely used tool to improve clinical decision making when randomized controlled trials are infeasible, underpowered, or lack generalizability. We performed an exploratory decision analysis of routine second trimester ultrasound to detect fetal anomalies, focusing on the assumptions that would have the greatest impact. Six outcome categories ...
Chervenak F A - - 1998
The ethical dimensions of the debate on routine ultrasound are analyzed. The central role of the informed consent process, based on a respect for the autonomy of the pregnant woman, is presented. Failure to offer quality ultrasound in clinical settings where it is available restricts access to pregnant women to ...
Sanders R C - - 1998
Malpractice suits related to fetal anomalies are now the most common type of litigation involving ultrasound, surpassing ectopic pregnancy. Missing an anomaly on a sonogram performed for a standard indication, such as dating, is the most frequent type of litigation. Other causes of litigation include invented anomalies and unrecognized anomalies ...
Blaas H G - - 1998
AIM: Description of the development of the human embryonic brain visualized by transvaginal ultrasound. Methods. In two studies, healthy pregnant women without any pregnancy complications and normal outcomes were examined by transvaginal ultrasound in the early pregnancy between seven and twelve weeks of gestation. The hypoechogenic brain cavities were described ...
James C A - - 1998
To define the incidence of urinary tract abnormalities detected by antenatal ultrasound and assess changes in postnatal management we conducted a retrospective survey using data bases of the nephro-urology unit, obstetric ultrasound and perinatal pathology departments. The birth population (105,542) of the two Nottingham teaching hospitals between January 1984 and ...
Abu-Musa A - - 1998
A hysterosalpingogram revealed a septate uterus in a 29 year old nulliparous woman with a history of recurrent pregnancy loss. The patient underwent Tompkins metroplasty in the proliferative phase of the menstrual cycle. One month after the operation she presented with a delay in her menses and a positive pregnancy ...
Wong T W - - 1998
OBJECTIVE: To assess the value of ultrasound in an emergency department in the diagnosis of early pregnancy complications, the efficacy of a study protocol in identifying ectopic pregnancies, and the agreement on ultrasound findings among emergency department staff and gynaecologists. METHODS: All women presenting with early pregnancy complications had a ...
Shih J C - - 1998
OBJECTIVE: To evaluate the feasibility of examining the fetal ear with three-dimensional ultrasound. METHODS: In 125 pregnancies between 19 and 38 weeks of gestation, fetal ears were evaluated by three-dimensional ultrasound. The volume images with surface rendering were analyzed to depict the morphology, lying axis, orientation, and cranial location of ...
Mielke G - - 1998
OBJECTIVE: Fetal sex determination by ultrasound, and its medical and ethical implications, has been predominantly discussed in mid and late gestation. The development of high resolution ultrasound equipment has provided the possibility of detailed visualization of the fetus in early pregnancy. The present prospective study investigates the feasibility and accuracy ...
Broome D R - - 1998
OBJECTIVE: Evaluation of the fetal spine is an essential part of obstetric sonography; however, many technical factors may limit this examination. The purpose of our study was to determine if having the mother seated during sonography could significantly improve visualization of the fetal spine when sonography in routine supine and ...
Hata T - - 1998
OBJECTIVE: To visualize fetal surface anatomic structures in advancing gestation by use of three-dimensional ultrasonography with a specially developed abdominal three-dimensional transducer. METHODS: One hundred six normal fetuses from 9 to 40 weeks' gestation were studied with a specially developed abdominal three-dimensional transducer (3.5 MHz). This imaging system can provide ...
Rempen A - - 1998
The objective of this prospective follow-up study was to evaluate the potential utility of three-dimensional (3D) ultrasound to differentiate intrauterine from extrauterine gestations. Fifty-four pregnancies with a gestational age <10 weeks and with an intrauterine gestational sac <5 mm in diameter formed the study group. The configuration of the endometrium ...
van der Stege J G - - 1998
Perlman syndrome is a rare disease with a poor prognosis. Until now, the specific antenatal diagnostic criteria of this syndrome have not been documented. We report on two pregnancies with Perlman syndrome, in the same woman, in which karyotyping and ultrasound examination were performed. In the first pregnancy, the final ...
Long G - - 1998
OBJECTIVES: To evaluate the cost-benefit of changing from selective (high risk) to routine ultrasound screening for fetal anomaly. SETTING: Women booked by general practitioners for primary antenatal care at their local hospital. METHODS: Prospective study of the 12 months before and after introduction of routine second trimester ultrasound for fetal ...
den Hollander N S - - 1997
Blomstrand chondrodysplasia is a rare lethal skeletal dysplasia with presumed autosomal-recessive inheritance. A family with 2 affected fetuses was studied. One fetus demonstrated a severe skeletal dysplasia at routine transabdominal ultrasound examination at 18.5 weeks of gestation. The pregnancy was terminated and the diagnosis of Blomstrand chondrodysplasia was made at ...
Kobata R - - 1997
A report is presented of a male infant with prune belly syndrome (PBS) in whom bladder enlargement was detected by ultrasound (US) as early as 13 weeks of gestation. Subsequent fetal US identified progressive urinary tract dilatation, ascites and oligohydramnios. At 22 weeks, the fetal bladder was drained under US ...
Petrikovsky B M - - 1997
Pseudothalidomide syndrome is a rare autosomal recessive condition characterized by tetraphocomelia, craniofacial abnormalities and postnatal growth restriction. We report the prenatal sonographic findings of pseudothalidomide syndrome in three consecutive pregnancies of a consanguineous couple. In the last pregnancy, the correct diagnosis was made sonographically at 11 weeks of pregnancy. The ...
Ginsberg N E - - 1997
Ultrasound examination in a 10-week fetus demonstrated a marked deformity of the lower half of the fetus that was in the celomic cavity, and the upper half of the body was in the amniotic sac. There was abdominal wall defect with herniation of the liver and bowel, the lower limbs ...
Tarantal A F - - 1997
The goal of these studies was to correlate sonographic evidence of pregnancy during the peri-implantation period with the timing of the rise in monkey chorionic gonadotropin (mCG) as measured with an enzyme-linked immunosorbent assay. Animals were time-mated at mid-cycle, and ultrasound examinations were performed on postovulation days 12-15 (n = ...
Høgberg U - - 1997
BACKGROUND: This study aims to evaluate the impact of routine ultrasound in early pregnancy on pregnancy outcome and perinatal mortality. METHODS: Using the Swedish Medical Birth Registry, a two-stage study was designed. First, an ecological study that included data from 45 hospitals, with 1,280,746 children born during the years 1974-1991, ...
Altman D G - - 1997
We describe new charts and tables for dating pregnancies derived from data collected in a study designed to enable the construction of these and charts of fetal size. This was a prospective study in which 663 fetuses seen in the routine ultrasound clinic in a London teaching hospital were scanned ...
Kimber C P - - 1997
A woman was referred at 25 weeks' gestation with decreased fetal movements. Ultrasound revealed a large solid fetal abdominal mass and gross fetal ascites. Amniocentesis and viral titers were normal. On subsequent ultrasound examinations, the mass and ascites slowly disappeared, but a small bowel obstruction developed. Spontaneous labor occurred at ...
Braaten J V - - 1997
Ultrasound accelerates fibrinolysis in vitro and in vivo, primarily through non-thermal mechanisms including cavitation. We have previously observed that ultrasound reversibly increases flow through fibrin gels, a property primarily determined by the structure of the fibrin matrix. Therefore, the effect of ultrasound on the ultrastructure of fibrin gels was examined ...
Zimmer E Z - - 1997
The objectives of the study were (1) to assess whether prenatal ultrasound examinations affected the prevalence of congenital anomalies at birth and the incidence of terminations of pregnancy for fetal anomalies and (2) to examine the detection rate of the main fetal anomalies. We studied all births and stillbirths with ...
Holmes L B - - 1997
An 11-year-old boy is described who was born with a poorly developed right foot. At 16 weeks gestation his mother had had amniocentesis without direct ultrasound guidance. After the insertion of the amniocentesis needle, she felt strong abdominal resistance, which disappeared with slight withdrawal of the needle. Then, real-time ultrasound ...
Deutchman M E - - 1997
Some clinician physicians who provide perinatal care find that they have the motivation and practice volume to learn diagnostic ultrasonographic skills. These skills may be limited to labor and delivery applications or may extend to performance of the standard antepartum obstetric ultrasound examination. Limited skills include the diagnosis of fetal ...
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