1,720,981 research outputs found
MORTALITY AFTER BARIATRIC SURGERY: ANALYSIS OF 13,871 MORBIDLY OBESE PATIENTS FROM A NATIONAL REGISTRY.
No full textOBJECTIVE:
To define mortality rates and risk factors of different bariatric procedures and to identify strategies to reduce the surgical risk in patients undergoing bariatric surgery.
SUMMARY BACKGROUND DATA:
Postoperative mortality is a rare event after bariatric surgery. Therefore, comprehensive data on mortality are lacking in the literature.
METHODS:
A retrospective analysis of a large prospective database was carried out. The Italian Society of Obesity Surgery runs a National Registry on bariatric surgery where all procedures performed by members of the Society should be included prospectively. This Registry represents at present the largest database on bariatric surgery worldwide.
RESULTS:
Between January 1996 and January 2006, 13,871 bariatric surgical procedures were included: 6122 adjustable silicone gastric bandings (ASGB), 4215 vertical banded gastroplasties (VBG), 1106 gastric bypasses, 1988 biliopancreatic diversions (BPD), 303 biliointestinal bypasses, and 137 various procedures. Sixty day mortality was 0.25%. The type of surgical procedure significantly influenced (P < 0.001) mortality risk: 0.1% ASGB, 0.15% VBG, 0.54% gastric bypasses, 0.8% BPD. Pulmonary embolism represented the most common cause of death (38.2%) and was significantly higher in the BPD group (0.4% vs. 0.07% VBG and 0.03% ASGB). Other causes of mortality were the following: cardiac failure 17.6%, intestinal leak 17.6%, respiratory failure 11.8%, and 1 case each of acute pancreatitis, cerebral ischemia, bleeding gastric ulcer, intestinal ischemia, and internal hernia. Therefore, 29.4% of patients died as a result of a direct technical complication of the procedure. Additional significant risk factors included open surgery (P < 0.001), prolonged operative time (P < 0.05), preoperative hypertension (P < 0.01) or diabetes (P < 0.05), and case load per Center (P < 0.01).
CONCLUSIONS:
Mortality after bariatric surgery is a rare event. It is influenced by different risk factors including type of surgery, open surgery, prolonged operative time, comorbidities, and volume of activity. In defining the best bariatric procedure for each patient the different mortality risks should be taken into account. Choice of the procedure, prevention, early diagnosis, and therapy for cardiovascular complications may reduce postoperative mortality
Mortality after bariatric surgery: analysis of 13,871 morbidly obese patientsfrom a national registry.
No full textOBJECTIVE: To define mortality rates and risk factors of different bariatric
procedures and to identify strategies to reduce the surgical risk in patients
undergoing bariatric surgery.
SUMMARY BACKGROUND DATA: Postoperative mortality is a rare event after bariatric
surgery. Therefore, comprehensive data on mortality are lacking in the
literature.
METHODS: A retrospective analysis of a large prospective database was carried
out. The Italian Society of Obesity Surgery runs a National Registry on bariatric
surgery where all procedures performed by members of the Society should be
included prospectively. This Registry represents at present the largest database
on bariatric surgery worldwide.
RESULTS: Between January 1996 and January 2006, 13,871 bariatric surgical
procedures were included: 6122 adjustable silicone gastric bandings (ASGB), 4215
vertical banded gastroplasties (VBG), 1106 gastric bypasses, 1988 biliopancreatic
diversions (BPD), 303 biliointestinal bypasses, and 137 various procedures. Sixty
day mortality was 0.25%. The type of surgical procedure significantly influenced
(P < 0.001) mortality risk: 0.1% ASGB, 0.15% VBG, 0.54% gastric bypasses, 0.8%
BPD. Pulmonary embolism represented the most common cause of death (38.2%) and
was significantly higher in the BPD group (0.4% vs. 0.07% VBG and 0.03% ASGB).
Other causes of mortality were the following: cardiac failure 17.6%, intestinal
leak 17.6%, respiratory failure 11.8%, and 1 case each of acute pancreatitis,
cerebral ischemia, bleeding gastric ulcer, intestinal ischemia, and internal
hernia. Therefore, 29.4% of patients died as a result of a direct technical
complication of the procedure. Additional significant risk factors included open
surgery (P < 0.001), prolonged operative time (P < 0.05), preoperative
hypertension (P < 0.01) or diabetes (P < 0.05), and case load per Center (P <
0.01).
CONCLUSIONS: Mortality after bariatric surgery is a rare event. It is influenced
by different risk factors including type of surgery, open surgery, prolonged
operative time, comorbidities, and volume of activity. In defining the best
bariatric procedure for each patient the different mortality risks should be
taken into account. Choice of the procedure, prevention, early diagnosis, and
therapy for cardiovascular complications may reduce postoperative mortality
ASO Author Reflections: Minimally Invasive Surgery for Colorectal Cancer: Where Do We Stand?
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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