1,720,960 research outputs found
Behavior of Local Lymphatic-system Following Aorto-iliaco-femoro-popliteal Reconstruction
No full textAs a result of the observation of oedemas of the lower extremities and lymphorrhoea in the immediate postoperative course of surgical reconstruction of the aorto-iliaco-femoro-popliteal arterial axis (and on the basis of similar cases in the literature), the participation of the lower extremity return circulation in this facet of vascular surgery has been documented. The venous system was never impaired whereas the local lymphatic system was always damaged by surgical aggression on the arterial vessels. However, the extensive anatomical lesions shown up by lymphography are not reflected in evident clinical signs; whenever oedema or lymphorrhoea of the surgical wounds are observed, these symptoms are always of slight importance and easily and quickly resolved. At long-term follow-up, no clinical evidence of impairment ot the venous and lymphatic venous return circulation was ever encountered. For prophylactic purposes the lymphatic structure encountered during the operation should be carefully ligated to counteract another dangerous complication: infection
Hyperplasia of Suprarenal Medulla
No full textA case of arterial hypertension due to suprarenal medulla hyperplasia is reported. Having accepted the existence of this form, the problem of its recognition is stressed, in the presence of catecholamine pathology, even though the type or site of its anatomo-pathological substrate cannot be identified, explorative surgery and possible removal of the suprarenal glands can be indicated
Gli aneurismi infiammatori dell'aorta sottorenale : aspetti istopatologici, diagnostici e terapeutici
No full textInflammatory abdominal aneurysms (AIAA) represent a clearly defined clinical entity with an incidence ranging between 1.2% and 15%. In spite of the increasing number of observations reported in recent years, the etiopatholgenesis and natural history have not been defined. The lesion can present in an acute, subacute or chronic manner and the histopathological studies reveal prevalently two components: an inflammatory infiltrate and a diffuse fibrosis, in varying degree. This study aimed to analyze the more recent imaging procedures in order to correctly diagnose this lesion. In our experience the incidence of AIAA is about 2.5%. On the basis of macro microscopic pictures the authors divided patients into two groups: one constituted by the acute or subacute inflammatory forms, the other by chronic clear inflammatory aneurysms. All patients underwent on operative treatment. The surgical adopted techniques and the obtained results are reported
Massive Pulmonary-embolism - Clinical Aspects and Treatment
No full textThe frequency of pulmonary embolization seems to be increasing. Venostasis, intimal damage and hypercoagulability of blood are the more recognized causes of pulmonary thromboembolism. It is especially threatening to the elderly, obese, immobilized (for an accident or an operation) patients. Pulmonary isotopic scans or angiograms are most often relied upon to establish the diagnosis. A properly performed pulmonary angiography is necessary to establish or refute the diagnosis in almost every case. With the exception of the patients suddenly dying for a massive pulmonary embolism, the period of time between onset of symptoms and death is usually adequate for substantiating a diagnosis and promptly beginning a fit anticoagulation therapy using continuous intravenous heparin or fibrinolytic agents infusion. Although it is not proper to separate surgical and medical treatment of thromboembolism, the Authors, on the ground of their experience on 5 patients affected by massive pulmonary embolism, in 3 of whom was performed a successful embolectomy, think that heparin anticoagulation treatment is at any rate to apply for treating pulmonary embolism, but in patients in whom the shock is unresponsive to vasopressors or in whom anticoagulation therapy is controindicated, the surgical removal of pulmonary emboly, with the support of a pump oxygenator, is the treatment of choice for the acute massive pulmonary thromboembolism
Ruptured aneurysm of the internal iliac artery
No full textThe aneurysms of the internal iliac artery are rare and very often asymptomatic. Because of the anatomic location of this artery, it can be difficult to diagnose this kind of aneurysm, when isolated. Frequently it is diagnosed in consequence of aneurysmatic complication, such as rupture and/or impending rupture. In this work we report our experience concerning 6 cases of ruptured aneurysm of the internal iliac artery, observed in 5 patients. In three of these cases the lesion was isolated. In two cases the patients had already been operated on for abdominal aortic aneurysm, 4 and 6 years before. All the five patients were operated on. In 5 cases we ligated the aneurysm, without using any vascular graft. In one case where the external iliac artery was involved, we used a vascular graft between the common iliac and common femoral artery, in order to repair the vascular axis. One case of mortality was observed and a rare complication occurred in one case. An 83-year-old man treated in emergency for ruptured aneurysm of the left internal iliac artery, with regular post-operative course, was hospitalized again 24 days later with sepsis and pain in the left lower abdomen. A CT scan and a following urography showed a urinary fistula probably due to an ischemic necrosis of a segment of the ureter. A percutaneous nephrostomy has been performed and the patient successfully discharged
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
Reconstructive surgery of the abdominal aorta in a case of left-positioned inferior vena cava : clinical case and review of the literature
No full textAn unsuspected left-sided inferior vena cava (IVC) can present a formidable challenge for the surgeon attempting abdominal aortic surgery. The incidence of congenital anomalies of the post-renal (infrarenal) vena cava is approximately 3%, with double inferior vena cava most frequently occurring. The authors refer to a case of isolated left-sided vena cava in a 53 year old man who underwent an aorto-femoral bypass graft for aorto-iliac occlusive disease. On the basis of a literature review the authors recall the incidence and the embryology of this anomaly, and analyze its surgical implications, with particular reference to abdominal aortic surgery
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