1,720,964 research outputs found
Second-trimester induced abortions in two tertiary centres in Rome
No full textDemand for second-trimester induced abortions (STIAs) increases in Italy. For these procedures, prostaglandins alone were used until 2010, when mifepristone became available. The present study compares the two modalities, and investigates the reasons for STIAs. The records of all such procedures performed at the Department of Gynaecology, Obstetrics and Urology of the 'Sapienza' University (Rome), between January 2004 and December 2012, and of all those done at the 'San Filippo' Hospital (Rome), between January 2010 and December 2012, were analysed. Data gathered included women's age, obstetric history, reasons for requesting the STIA, gestational age, mode of intervention, and complications if any. During the study period, 353 women requested a STIA. Karyotype or genetic anomalies were the reason for the request in 187 cases (53%), while structural anomalies, both single and multiple, were given as the reason in 158 (45%). In most cases, these anomalies were assessed by ultrasound scan. Few studies have investigated reasons for requesting STIAs. Of all chromosome abnormalities diagnosed in this study, trisomy 21 was the most common (59%) and it was the most frequent reason for requesting pregnancy termination
Matrix array transducer for the examination of fetal heart
No full textThe X6-1 xmatrix array transducer allows a completely new approach to the diagnostic ultrasound: it permits visualization of fetal heart in real time, without the need for gating, and it is unaffected by motion artefacts. It is obtained in real time, without any spatial reconstruction. The authors compared this technology with the traditional one in two case reports: a diagnostic doubt of small muscular ventricular septal defect was solved using this new technique; a diagnosis of complete atrioventricular septal defect was confirmed. Three-dimensional real-time imaging would seem very precise in the study of fetal heart: the defects were fully visualized from any angulations. This new technology is promising but from the authors' limited experience, there is no evidence to use it in routine practice. It should be very useful to commence a prospective study on fetuses at risk while testing the superiority of this technique.The X6-1 xmatrix array transducer allows a completely new approach to the diagnostic ultrasound: it permits visualization of fetal
heart in real time, without the need for gating, and it is unaffected by motion artefacts. It is obtained in real time, without any spatial reconstruction.
The authors compared this technology with the traditional one in two case reports: a diagnostic doubt of small muscular
ventricular septal defect was solved using this new technique; a diagnosis of complete atrioventricular septal defect was confirmed.
Three-dimensional real-time imaging would seem very precise in the study of fetal heart: the defects were fully visualized from any angulations.
This new technology is promising but from the authors’ limited experience, there is no evidence to use it in routine practice.
It should be very useful to commence a prospective study on fetuses at risk while testing the superiority of this technique
A case of uterine rupture in mid-trimester spontaneous abortion: a complication of gemeprost vaginal administration
No full textThe only prostaglandin analogue licensed in Italy for induction of labour in spontaneous and therapeutic abortion is gemeprost.
The authors report a case of spontaneous uterine rupture of a scarred uterus, for previous caesarean sections, in a woman at 20 weeks
of gestation with a diagnosis of spontaneous abortion. She received a pessary of gemeprost every three hours. After the fifth pessary,
she complained of severe pain. At the ultrasound examination, uterine cavity appeared empty and the dead fetus was dislocated in the
abdomen. Emergency laparotomy was performed and uterine tear was repaired. To induce labour for fetal demise or therapeutic abortion
in second trimester in women with scarred uterus, the authors decided to lengthen the time between administrations of pessary
from four to five hours depending on patient’s symptoms. However the appropriate drug regimen has still to be found and more data
are necessary
Spontaneous septostomy in monochorionic diamniotic twins: Difficult diagnosis, difficult management
No full text[No abstract available
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Pfeiffer syndrome: literature review of prenatal sonographic findings and genetic diagnosis
No full textPfeiffer syndrome (PS) is an autosomal dominant disorder caused by mutations in FGFR1 and FGFR2 genes. Given its wide range of clinical expression and severity, early prenatal diagnosis is difficult and genetic counseling is desirable. We report a literature review of all prenatal diagnosis of PS and a case report, with a focused description of ultrasound findings
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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