1,720,990 research outputs found
Subcutaneous and Intra-Arterial Nitroglycerin Administration to Facilitate Femoral Artery Access for Neuroendovascular Procedures on Infants and Toddlers
No full textDural arteriovenous fistula onyx embolization through a non-visible previously embolized pedicle
No full textCerebral dural arteriovenous fistulas (dAVFs) are commonly treated with endovascular embolization, either through arterial or venous routes in single or multi-staged procedures. Treatment outcomes depend on multiple factors, including the patient's clinical status, the anatomy of the malformation, and the operator's experience, but technical success is also highly dependent on choice of neurovascular devices and embolic agents. When transvenous routes are not feasible and the most obvious transarterial routes do not appear safe, deep knowledge of the dynamic fluid properties of liquid embolics can be a valuable asset. We present a case(video 1) in which a complex skull-base dAVF was completely occluded through a non-visualized previously partially embolized arterial feeder. It is a unique case in which the embolization takes advantage of the peculiar fluid dynamic properties of non-adhesive embolic agents (Onyx-Medtronic, Minnesota, USA) 18 and 34.1-3 neurintsurg;16/8/852/V1F1V1Video 1 Technical video presenting a dAVF completely cured through a non-visible previously embolized arterial pedicle
MR Imaging of Inner Ear Endo-perylinfatic Space at 3 Tesla after intratympanic Contrast Agent Administration in Definite Meniere's Disease
No full textMiddle meningeal artery embolization as standalone treatment versus combined with surgical evacuation for chronic subdural hematomas: systematic review and meta-analysis
No full textOBJECTIVE Middle meningeal artery embolization (MMAE) is a novel treatment for chronic subdural hematomas (cSDHs) with high variability of use across practitioners and institutions. This study sought to investigate whether standalone MMAE may be an effective alternative to combined MMAE and surgery for select patients with cSDH. METHODS The authors searched the Medline and Embase databases for studies reporting outcomes specific to standalone MMAE and combined MMAE and surgery. The Risk of Bias in Non-randomized Studies of Interventions (ROBINS-I) tool was used to assess risk of bias in each included study. Patient characteristics were compared between cohorts, and rates of surgical recurrence of standalone MMAE and combined MMAE and surgery were pooled using random-effects models. RESULTS Four hundred two unique patients (156 with standalone MMAE and 246 with combined MMAE and surgery) were identified across 8 studies. Overall, the subdural thickness for the standalone MMAE group was modestly but statistically significantly smaller (16.8 vs 18.8 mm, estimated p value 0.002), and the mean follow-up time was significantly longer for the standalone MMAE group (5.4 vs 2.3 months, estimated p value < 0.001); there were no significant differences between age, sex, and anticoagulant use. The surgical recurrence rates were not significantly different between the two groups (estimated p value 0.63). Using random-effects models, the surgical recurrence rates were estimated at 6.8% (95% CI 3.5%–11.2%) and 4.6% (95% CI 2.3%–7.7%) for standalone MMAE and combined MMAE and surgery, respectively. CONCLUSIONS Standalone MMAE for cSDH may yield a low rate of surgical recurrence, which may be comparable to that of combined MMAE and surgery. However, studies in this systematic review and meta-analysis were primarily single-arm studies prone to treatment bias. Future studies are needed to further investigate whether standalone MMAE may be an effective alternative to combined MMAE and surgical treatment for cSDH in select patients
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
Recurrent stereotyped TIAs: atypical Bow Hunter’s syndrome due to compression of non-dominant vertebral artery terminating in PICA
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