1,720,969 research outputs found
Acute necrotizing pancreatitis due to hepatitis B reinfection in a liver transplant recipient
No full textBleeding Esophageal Varices: Today's Role of Portosystemic Shunts
No full textEmergency portosystemic shunting has once again become a significant option in the management of bleeding esophageal varices and portal hypertension. The decision to perform such a shunt and the choice of shunt procedure requires a rational assessment of the pathophysiology and hepatoportal hemodynamics of the patient's disease and the manner in which it is anticipated that the selected procedure may alter portal flow. Since shunt surgery may interfere with hepatic transplantation, the patient's suitability as a future transplant recipient must also be considered in choosing a shunt procedure. Furthermore, if a shunt is to be performed on an emergency basis to control acute bleeding, this procedure must be done before the patient's condition deteriorates sufficiently to represent a prohibitive surgical risk
Ruptured hepatocellular carcinoma: an important cause of spontaneous haemoperitoneum in Italy
No full textOBJECTIVE: To evaluate the incidence of rupture of the tumour with intraperitoneal bleeding in a series of patients with hepatocellular carcinoma and its relative incidence as a cause of spontaneous haemoperitoneum, and to evaluate the results of the surgical treatment of a consecutive series of patients who presented with spontaneous haemoperitoneum caused by ruptured hepatoma.
DESIGN: Retrospective study.
SETTING: University hospital, Italy.
SUBJECTS: 8 patients whose hepatocellular carcinoma ruptured (out of a total of 518) and caused spontaneous haemoperitoneum, and 34 patients who were admitted with spontaneous haemoperitoneum.
INTERVENTIONS: Seven hepatic resections; in one case direct haemostasis was attempted because of the poor hepatic reserve.
RESULTS: Rupture of the tumour with intraperitoneal bleeding occurred in 8/518 (2%) of cases of hepatocellular carcinoma. Ruptured hepatocellular carcinoma was the second most common cause of spontaneous haemoperitoneum (8/34; 24%), after gynaecological diseases (15/34; 44%). Of the 7 patients who presented with ruptured hepatocellular carcinoma and were treated by hepatic resection, 3 are alive (one with a recurrent disease) after a mean follow-up of six months (range 3 to 12 months) and 4 died of carcinomatosis within 12 months. The patient for whom resection was not feasible died immediately postoperatively of irreversible shock.
CONCLUSIONS: Rupture of hepatocellular carcinoma is a relatively common cause of spontaneous haemoperitoneum. Diagnosis at the onset of symptoms has important therapeutic implications: as the results of surgical treatment are unsatisfactory, other procedures with the limited goal of achieving satisfactory haemostasis can be considered if the hepatocellular carcinoma has been diagnosed
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
Fatal necrotizing pancreatitis caused by HBV infection in a liver transplant recipient: clinical and histological evidence
No full textA 32-year-old man who had undergone liver transplantation for fulminant hepatitis due to HBV infection developed fatal acute necrotizing pancreatitis on the 60th post-transplant day, while showing signs of intense viral replication. Immunohistochemistry and in situ hybridization of the pancreas following autopsy showed the presence of HBsAG and HBV-DNA in the cytoplasm of acinar cells, together with the picture of necrotizing pancreatitis. Clinical and histological features seem to indicate that pancreatitis was directly caused by HBV infection
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