1,720,967 research outputs found
An experimental model of gastroschisis using fetoendoscopy: preliminary results and technical considerations
No full textBackground: The aim of this study was to show the feasibility
of an experimental model of gastroschisis using fetoendoscopic
surgery on sheep fetuses, and also to perform
amnioinfusion until delivery using an in-dwelling intraamniotic
catheter.
Methods: We analyzed the data from 18 pregnant ewes
having 26 fetuses, which underwent surgery at 80 days of
gestation (full term, 145 days). The fetendo technique was
used to create a gastroschisis in 15 fetuses. The fetal abdominal
wall was opened on the left side of the cord using
scissors. The omentum and the intestinal loops were eviscerated
using atraumatic forceps. Eleven fetuses were used
as a control group. Twenty-one fetuses underwent amnioinfusion;
a simple exteriorized catheter was used in seven
cases and an intraamniotic catheter with an implantable port
was used in the other 14. All ewes and fetuses were killed
at the end of the experiment by an intravenous injection of
pentotal; thereafter, the fetuses underwent necropsy.
Results: Twelve fetuses died and 14 survived (53.8%);
seven of the 15 that underwent gastroschisis survived
(46.7%). An amniotic infection occurred in nine fetuses
(34.6%); of these, six died and three that were administered
antibiotics survived.
Conclusions: Our experience shows that this experimental
model of gastroschis is feasible and reproducible, and that a
repeated amnioinfusion can be performed with an indwelling
catheter in pregnant ewes. The use of an implantable
port is safer than a simple exteriorized catheter
A Retrospective Analysis Of 50 Years Of Open Surgery. In The Treatment Of Gastroesophageal Reflux
No full textAn experimental model of gastroschisis using fetoendoscopy: preliminary results and technical considerations
No full textBackground: The aim of this study was to show the feasibility
of an experimental model of gastroschisis using fetoendoscopic
surgery on sheep fetuses, and also to perform
amnioinfusion until delivery using an in-dwelling intraamniotic
catheter.
Methods: We analyzed the data from 18 pregnant ewes
having 26 fetuses, which underwent surgery at 80 days of
gestation (full term, 145 days). The fetendo technique was
used to create a gastroschisis in 15 fetuses. The fetal abdominal
wall was opened on the left side of the cord using
scissors. The omentum and the intestinal loops were eviscerated
using atraumatic forceps. Eleven fetuses were used
as a control group. Twenty-one fetuses underwent amnioinfusion;
a simple exteriorized catheter was used in seven
cases and an intraamniotic catheter with an implantable port
was used in the other 14. All ewes and fetuses were killed
at the end of the experiment by an intravenous injection of
pentotal; thereafter, the fetuses underwent necropsy.
Results: Twelve fetuses died and 14 survived (53.8%);
seven of the 15 that underwent gastroschisis survived
(46.7%). An amniotic infection occurred in nine fetuses
(34.6%); of these, six died and three that were administered
antibiotics survived.
Conclusions: Our experience shows that this experimental
model of gastroschis is feasible and reproducible, and that a
repeated amnioinfusion can be performed with an indwelling
catheter in pregnant ewes. The use of an implantable
port is safer than a simple exteriorized catheter
Pediatric endoscopic surgery: pride and prejudice
No full text82 endoscopic surgical procedures (abdominal: 77; thoracic: 5) were performed by the same surgeon on 75 children aged from 1 month to 17 years (median 8.1 years) during the two-year period from January 1991 to December 1992. Due to the multispecialization of the Children's Hospital, a variety of pathologies were explored or treated with appendectomy accounting for 33% (27/82). There were no perioperative deaths. Three major complications occurred (1 post-appendectomy peritonitis, 1 hemorrhage during splenectomy and 1 post-operative occlusion). 14 patients required conversion to open surgery. Indications for endoscopic exploration of advanced lesions, prospective indications, and policy when confronted with a healthy appendix are discussed
The Importance of Surgical Risk Factors (SRF) in primary surgery for localized neuroblastoma (NBL): results of LNESG I Study
No full text
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
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