1,721,120 research outputs found
Petrous apex cholesterol granuloma: transsphenoid endoscopic approach.
No full textThe transsphenoid approach to the petrous apex, a surgical procedure described for the first time by Montgomery in 1977, is a rarely performed approach for the drainage and ventilation of cholesterol granuloma. We consider this approach to be the technique of choice when the cholesterol granuloma is located in the medial section of the petrous apex abutting and/or prolapsing into the posterior wall of the sphenoid sinus. The transsphenoid approach, unlike other lateral approaches to the petrous apex, is highly conservative and spares cochlear and vestibular function; moreover, it allows simple and adequate post-operative endoscopic follow up as an out-patient, with easier treatment in the case of recurrence
Aspetti istologici ed ultrastrutturali del criptorchidismo: Considerazioni Anatomo cliniche.
No full text
Endoscopic revision stapes surgery: surgical findings and outcomes
No full textPurpose: Hearing results in revision stapes surgery are largely dependent on the cause of failure, and an appropriate intraoperative diagnosis is crucial for a good outcome. The endoscope allows a detailed exploration of the middle ear cavity and is particularly suitable for the intraoperative assessment of the cause of failure of previous stapes surgery. The present study analyzes the intraoperative findings and outcomes of patients undergoing revision stapes surgery through the endoscopic transcanal approach. Methods: Surgical videos and charts of patients undergoing endoscopic revision stapes surgery from 2008 to 2017 were reviewed retrospectively. Intraoperative findings, difficulties encountered during the surgery and hearing outcomes were evaluated. The feasibility of each surgical step with the totally endoscopic approach or the need for bimanual manipulation was assessed as well. Results: Thirty-four patients were included in the study. The endoscopic transcanal approach allowed a detailed exploration of the middle ear cavity and an accurate intraoperative diagnosis and management of the different causes of failure of the previous surgery. 89.8% of patients achieved an air-bone gap for the PTA ≤ 20 dBHL and 68.5% a closure of the air-bone gap. Conclusions: The present study showed that totally endoscopic revision stapes surgery is a feasible, safe and effective procedure. The transcanal endoscopic approach allowed an accurate intraoperative diagnosis without the need for an endaural or retroauricular approach, with the possibility to manage all the possible intraoperative scenarios. A larger series with a longer follow-up is needed to validate the results
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
Tonsillar swelling: always a simple diagnosis?
No full textA 45‐year‐old man presented with marked, progressive bulging of the right tonsil (Figure, A) and slight swelling of the right submandibular region. Gadolinium‐enhanced magnetic resonance imaging of the head and neck showed a large (5 × 4 × 3 cm) neoplasm, occupying the right parapharyngeal space, extending from the deep parotid lobe to the ipsilateral tonsillar region (Figure, B). The neoplasm was removed via an incision in the neck and identified, by histological examination, as a pleomorphic adenoma.
In many cases, the first clinical sign of a deep‐lobe parotid neoplasm is enlargement of the tonsillar region. Other differential diagnoses of tonsillar swelling include peritonsillar abscess, tonsillar neoplasm and internal carotid aneurysm
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
La chirurgia endoscopica delle vie lacrimali (dacriocistorinostomia per via endonasale)
No full textLa chirurgia endoscopica delle vie lacrimali (dacriocistorinostomia per via endonasale
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