1,720,993 research outputs found
Sleeve gastrectomy and gastric cancer: is it really rare?
No full textSleeve gastrectomy (SG) is currently the most frequently performed bariatric procedure worldwide [1]. Although incidental stromal tumor diagnosis of the SG specimen has been
occasionally found [2, 3], gastric adenocarcinoma has been
rarely reported
A conservative management of gastric bezoar in a novel bariatric procedure: Nissen-sleeve gastrectomy
No full textWe read with great interest the manuscript entitled “Conservative Managing of Bezoar in Giant Hiatus Hernia Causing Gastric Outlet Obstruction During the COVID-19 Pandemic” in which a bezoar has been found in a giant Hiatal
Hernia (HH) and conservatively treated during the COVID19 pandemic [1].
This stimulating case ofers us the opportunity to present our experience of a phytobezoar formation in a patient
afected by gastroesophageal refux disease (GERD) with
HH undergone the novel bariatric surgical procedure, the
Nissen-sleeve gastrectom
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
1L Peg Bowel Preparation before Colonoscopy for Selected High-Risk Inpatients in a Pilot Study
No full textAIM - Adequate colonic examination is strictly associated with optimal
bowel preparation. Split-dose polyethylene glycol (PEG) based bowel preparation is considered the gold standard in
order to obtain an optimal mucosal visualization during colonoscopy. Inpatients are high-risk patient for poor bowel
cleansing and often need a quickly diagnosis. The rate of inadequate inpatient bowel preparation is high and
associated with a significant increase in hospital length of stay and costs. The timing of colonoscopy is essential to
obtain a correct diagnosis in the shortest time and to reduce the length of hospital stay. The aim of our pilot study was
to test the efficacy and tolerability of a new same-day low dose, 1 liter, PEG based bowel preparation in hospitalized
patients.
METHODS - A single-center prospective pilot study was conducted including all hospitalized patients scheduled to
colonoscopy from August 2015 and August 2016 with a consisting suspect of colic stenosis or unable to drink a
standard large volume of PEG due their clinical condition. All included patients were divided in two groups receiving:
1L PEG-based on the same day or 4L PEG split dose, performing colonoscopy within 4 hours after the last dose.
Patient demographics, medical history and Bristol Stool Scale type were acquired (Tab. 1). Endoscopic data as caecal
intubation, withdrawal time, adenoma detection rate and quality of colonic preparation, assessed by the Boston bowel
preparation scale (BBPS), were also recorded (Tab. 2).
RESULTS - 44 inpatients (male= 27; mean age 63.5 years; age range=20-94 ) were enrolled between August 2015
and August 2016. 22 patients received 1L PEG-based (Group A) and the others 22 received 4L PEG-based split dose
preparation (Group B). The bowel preparation was adequate in fourteen patients of the Group A and in twelve patients
of the Group B (Fig. 1). An optimal bowel cleansing was reached in 82% (Group A) and 71% (Group B) of patients.
The mean exploration time was 24 and 22 min respectively (caecal intubation rate=77% for both groups). The ADR
was 32% (Group A) and 18% (Group B) and ADK rate was 27% and 14% respectively.
CONCLUSION - Our data support that this schedule protocol allows a correct diagnosis in most of patients and show
the greater weight of the interval time between the end of the bowel preparation and the beginning of colonoscopy
compared to the volume of PEG administered. In our study there are no statistical differences between the two groups
in terms of diagnostic rate and successful bowel cleansing achieved. Therefore the same-day low dose 1L PEG-based
bowel preparation could be introduced in selected inpatient in order to improve tolerability and to reduce the waiting
time in hospitalized high-risk patients. The promising results obtained with our bowel preparation protocol require
more randomized trials
CAN ENDOSCOPIC FEATURES IDENTIFYING THE LAST ENDOSCOPIC BAND LIGATION SESSION BEFORE GASTROESOPHAGEAL VARICEAL ERADICATION?
No full textIntroduction: Endoscopic Band Ligation (EBL) is performed to decrease
the risk of variceal bleeding. Initially proposed for the treatment of esophageal varices as a method for obtaining
hemostasis in acute bleeding, EBL has also been used electively for the prophylaxis of recurrent variceal bleeding.
Furthermore, at the consensus workshop of Baveno V it was concluded that either non-selective beta-blockers or
band ligation are recommended also for the prevention of a first variceal bleeding of medium or large varices. The aim
of this study is to find endoscopic parameters who could alone identify the last EBL before the eradication and the
other endoscopic sessions.
Patients and Methods: We selected from August 2013 to September 2016, 287 EBL sessions. Among the 287
sessions, we distinguished the ligation that preceded the eradication (Second to last Session) from all the others for
each patient who underwent EBL. All patients included were followed from the first upper gastrointestinal bleeding to
the variceal eradication. We excluded the first endoscopic session in which the diagnosis was performed and all the
endoscopic sessions in which the eradication has not been recorded.
The following endoscopic parameters of esophageal varices were recorded: size (F1-F2-F3 according to the
Japanese classification), blue tone (the percentage of varices with bluish coloration), and red color signs. Congestive
gastropathy was evaluated. Gastric varices were graded as absent or present and were distinguished in GOV and
IGV, while red color signs were classified. Bands’ number used during ligation was also recorded and was calculated
as ≤3 or >3.
Results: 95 endoscopic sessions were included. 51 were classified as second to last (Group A), and 44 as other
sessions (Group B). The variceal size and red color signs ( χ 2= 0,070) are represented in Tables 1. The blue tone
was 97,9% and 100% respectively. The number of arranged bands was ≤4 in 11 and 19 sessions respectively (61,1%
vs 82,6 %) and > 4 in 7 and 4 sessions for each group (38,9% vs 17,4%) (χ 2= 0,123) . There were no statistically
significant differences in the grade of congestive gastropathy between the two groups (χ 2= 0.432). The distribution of
GOVs in each group is represented in Table 3. In the 87,2% of cases GOVs are not detected during the second to last
sessions and none session who precede the eradication presented GOV2. (χ 2= 0,019).
Conclusions: In our experience the variceal size according to the Japanese classification and the presence of
gastroesophageal varices could be considered useful endoscopic indicators that can predict the eradication failure of
esophageal varices and can be used to indirectly identify the last session before the variceal eradication. Other
studies that include also clinical and biochemical datas are needed
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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