1,720,960 research outputs found
Plaque debulking for femoro-popliteal occlusions: techniques and results
No full textAlthough currently there is a trend of using percutaneous transluminal angioplasty (PTA) and stenting for the treatment of long occlusions of superficial femoral artery, many studies reported comparable results in terms of mid- and long-term patency between PTA and stenting and plaque debulking techniques such as remote endarterectomy, directional atherectomy catheter atherectomy and laser guided atherectomy. A successful debulking procedure is strongly associated with patients comorbidities, length of lesions and clinical presentation. In the last decade many new devices have been proposed to improve debulking results. Despite encouraging data about technical feasibility and limb salvage rate, debulking is still associated with a low rate of long-term primary and secondary patency. However, randomized clinical trials are expected and can hopefully provide conclusions on the effective durability of these procedures
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
Functional Ability in Patients with Critical Limb Ischaemia is Unaffected by Successful Revascularisation.
No full textAbstract View references (13)
Objective: Patient- and society-oriented measures of outcome have a critical role in determining the effectiveness of any treatment in patients with critical limb ischaemia (CLI). In particular, the impact of an intervention on patient's dependency and functional performance is relevant but is largely unknown. The aim of the study was to investigate whether the limitations encountered in the activities of daily living (ADLs) measured with the Katz Index (KI) in patients with CLI were changed by the treatment. Methods: During the period 2006-2008, 248 consecutive patients undergoing repair for CLI were investigated with an ADL questionnaire for assessing KI before and after a mean of 16.19 months from treatment. Changes in KI were stratified by type of treatment and outcome. Results: There were 165 males and 83 females, mean age 73.3 ± 8.3 years; 125 patients showed tissue loss and 123 rest pain alone, 98 received surgical bypass and 150 endovascular repair. Pre-operative KI mean was 10.42. At the post-operative assessment, there was significant worsening in patients' functional outcome (mean KI decreased to 9.78) despite relief of pain (81.5%), tissue healing (72%), good vessel patency (83.8%) and low amputation rate (9.7%). Deterioration of KI was not significantly higher in patients undergoing endovascular repair. Patients receiving major amputation started with worse pre-operative functional score (KI mean 9.42) and did further deteriorate (KI mean 7.71) after demolition surgery. However, patients who received successful revascularisation showed deterioration in the dependence index. Conclusions: Successful vascular treatment is not associated with improved functional ability in patients with CLI, especially when already highly dependent in their activities. Large nationwide preventive and educational programmes should be implemented to prevent irreversible and severe health deterioration in populations with CLI. © 2011 European Society for Vascular Surgery. Published by Elsevier Ltd. All rights reserved
Complications after endovascular treatment of extensive iliac artery disease
No full textThe main topic of the 2011 EVC textbook focuses on the prevention of complications and, when occurring, on their best management.
The Authors extensively discuss carotid artery interventions, prevention and treatment of cerebral ischemia during carotid endarterectomy and stenting, as well as management of post-procedural infection, arterial occlusion and restenosis. In open and endovascular aortic repair the Authors highlight practical issues including groin complications, difficult vascular access, case-planning, neurological complications, surveillance protocols, hybrid interventions, graft infection and burdensome anatomical issues in aortic access. The chapters dealing with peripheral arterial disease focus on prevention and treatment of problems after extensive iliac, superficial femoral and popliteal artery disease interventions. New exciting developments in extreme distal recanalization, drug-eluting stents and balloons, microsurgical extremity reconstruction and wound management are discussed and described in detail. Finally, the Authors present the new and modern technique of e-learning for the vascular specialist.
Contents
Prevention and treatment of cerebral ischemia during carotid endarterectomy
Prevention and treatment of cerebral ischemia during carotid artery stenting
Management of restenosis after carotid artery stenting and carotid endarterectomy
Complications after carotid revascularization
How to avoid and manage groin complications after endovascular repair
Difficult access for endovascular aortic aneurysm repair
Case planning for endovascular aortic repair with 3D workstations
Prevention and management of neurological complications of thoracic endografting
Late complications following EVAR: surveillance protocols and management
Retrograde visceral bypass for hybrid treatment of thoraco-abdominal aortic aneurysms
Dealing with vascular graft infection, including aortic enteric fistulas
Dealing with complications of open aortic surgery: access to the suprarenal aorta
Customized aortic repair: a novel endovascular treatment concept for aortic aneurysms
Complications after endovascular treatment of extensive iliac artery disease
Prevention and management of superficial femoral artery restenosis
Complications after open treatment of extensive femoropopliteal disease
Drug-coated balloons: clinical data and new developments
Below-the-knee endovascular procedures and strategies to improve early and late outcome
Differential indications for autologous bypasses in microsurgical extremity reconstruction
The modern role of primary and secondary amputation
Management of the diabetic angiopathic wound
Organization of modern wound management
e-Learning for the vascular specialis
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
Total endovascular solution for complex visceral aneurysms
No full textVisceral aneurysms are rare in the general population (<2%), and the most serious complication is represented by aneurysm rupture. The use of stent grafts to exclude visceral aneurysms is described in several reports but is reserved for patients with favorable anatomy. We report here on a hepatic artery pseudoaneurysm in a liver transplant patient and a patient with an aneurysmal vein graft degeneration of a renal bypass, both with no suitable proximal neck for standard stent grafting. Both patients were successfully treated with a custom-made aortic endograft with a single fenestration for the hepatic or renal artery, together with a visceral covered stent. Although initial results are promising, long-term follow-up is required to assess durability
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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