1,721,020 research outputs found
Intracranial aneurysm and diplopia due to oculomotor nerve palsy: pre- and post operative study
No full textPurpose
The aim of this study was to analyze ocular signs and symptoms in patients with oculomotor nerve palsy due to compression exerted by an intracranial aneurysm. We compare the results of two surgical treatments (microsurgical clipping against endovascular embolisation) in relation with the size of the aneurysm and the time between diagnosis and therapeutical approach
Materials and Methods
The study involved 16 patients. Each patient underwent an ophthalmological evaluation at the baseline and immediately, 6 months and 1 year after surgery, including the study of eyelid ptosis, ocular motility, pupil function, non-concomitant strabismus, diplopia and visual acuity
Results
The best recovery was seen in the patients undergoing aneurysm clipping. Palpebral ptosis was the first sign to appear and the first to regress, followed by pupil and medial rectus function. Recovery of the other muscles was slower and often incomplete
Conclusions
Ophthalmological examination is essential for the correct treatment and follow-up of patients with intracranial aneurysmsPURPOSE: The aim of this study was to analyze ocular signs and symptoms in patients with oculomotor nerve palsy due to compression exerted by an intracranial aneurysm. We compare the results of two surgical treatments (microsurgical clipping against endovascular embolisation) in relation with the size of the aneurysm and the time between diagnosis and therapeutical approach.
MATERIALS AND METHODS: The study involved 16 patients. Each patient underwent an ophthalmological evaluation at the baseline and immediately, 6 months and 1 year after surgery, including the study of eyelid ptosis, ocular motility, pupil function, non-concomitant strabismus, diplopia and visual acuity.
RESULTS: The best recovery was seen in the patients undergoing aneurysm clipping. Palpebral ptosis was the first sign to appear and the first to regress, followed by pupil and medial rectus function. Recovery of the other muscles was slower and often incomplete.
CONCLUSIONS: Ophthalmological examination is essent
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
Comparison between “early” or “late” intravitreal injection of dexamethasone implant in branch (BRVO) or central (CRVO) retinal vein occlusion: six months follow-up
Full text linkAIM:
The aim of this study was to compare early and late injections of intravitreal dexamethasone implant in patients affected by central retinal vein occlusion (CRVO) or branch retinal vein occlusion (BRVO) with a six-months follow-up. We assessed whether an earlier treatment start (within seven days from diagnosis) could be more beneficial than a delayed (or late) treatment start (after seven days).
MATERIALS AND METHODS:
The study included 81 patients (81 eyes) affected by retinal vein occlusion. Best corrected visual acuity was assessed through Early Treatment Diabetic Retinopathy Study (ETDRS) while central macular thickness (CMT) was measured by spectral-domain optical coherence tomography.
RESULTS:
Both types of patients had a positive therapeutic response to dexamethasone, with an increase in visual acuity (ETDRS) and CMT reduction. CRVO patients were characterized by lower ETDRS values at baseline and at the end of the follow-up as compared to BRVO. CRVO patients showed higher CMT values at baseline, after three and six months from injection. No significant differences in therapeutic response to dexamethasone were observed between patients treated early or late, regardless of RVO type.
CONCLUSIONS:
This study demonstrates that the therapeutic properties of dexamethasone implant are not significantly influenced by an early or late treatment start in patients affected by BRVO and CRVO, although its therapeutic efficacy seems greater in the former type
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