1,721,010 research outputs found
Tension pneumoperitoneum following endoscopic submucosal dissection of leiomyoma of the cardia
No full textSETTOTOMIA TRANSORALE PER VOLUMINOSO DIVERTICOLO FARINGOESOFAGEO DI ZENKER
No full textDonna di 75 anni con disfagia alta e ingravescente per i solidi insorta nell’ultimo anno; calo ponderale di 10 Kg e due episodi di broncopolmonite ab ingestis negli ultimi dodici mesi. All’Rx tubo digerente delle prime vie riscontro di voluminoso diverticolo faringoesofageo di Zenker di circa 10 cm di asse longitudinale. L’EGDS conferma la presenza del diverticolo che rappresenta la via preferenziale per lo strumento endoscopico. All’esame obiettivo si segnala assenza di cifoscoliosi cervicale e presenza di protesi dentarie mobili. Variabili antropometriche misurate preoperatoriamente: distanza interdentaria (4 cm), distanza tiro-mentoniera (10.4 cm) e distanza incisivo-sfinterica (16 cm). Punteggio di Mallampati 1, punteggio di Cormack 1.
In anestesia generale si procede all’esposizione del setto diverticolare con il diverticuloscopio di Werda modificato. Previo accurato lavaggio del fondo diverticolare con rimozione degli ingesti residui si introduce suturatrice lineare endoscopica da 35 mm con carica parenchimale. Sezione parziale del setto e misurazione del sacco diverticolare residuo. Posizionamento di 2 punti staccati di trazione a livello del setto diverticolare. Introduzione di seconda suturatrice parenchimale da 35 mm. Previa trazione del setto si completa la miotomia del muscolo cricofaringeo. Accurato controllo dell’emostasi
Numerical models for the evaluation of the contact angle from axisymmetric drop profiles: A statistical comparison
No full textAxisymmetric drop shape analysis (ADSA) is a well-established methodology for estimating the contact angle value and the surface tension of liquids starting from sessile drops images. It consists of an iterative procedure in which a best fit between a theoretical axisymmetric Laplacian curve and an experimental drop profile is performed. When only an evaluation of the geometric contact angle value is needed, a similar numerical approach can be adopted by using simpler algebraic models in place of a Laplace profile, thus allowing more straightforward implementations and shorter computation times.
In this work the relative merits of the different methodologies are compared. Beside the standard ADSA procedure, four different mathematical models are examined, namely the circular and elliptical models, the first-order perturbative solution of the Laplace equation, and a cubic spline model. Their relative statistical performances are tested on both calculated and experimental drop profiles. For simulated drops, the actual capability of the models to predict the correct contact angle is also investigated
Lymphangioma of the cervical esophagus associated with an inlet patch
No full textBackground: Lymphangiomas of the esophagus are extremely rare benign tumors of lymphatic origin. Localization in the proximal esophagus in association with an inlet patch and treatment by minimally invasive esophagectomy have not been reported.
Case report: A 74-year-old woman with a 12-year history of multiple endoscopic dilatations was referred because of progressive dysphagia and aspiration. A 1.5-cm stricture of the cervical esophagus with a residual diameter of 5 mm was confirmed at endoscopy. Biopsies were negative for dysplasia/neoplasia.
Results: Laparoscopic transhiatal esophagectomy with cervical esophagogastric anastomosis was successfully performed. Pathological examination of the surgical specimen demonstrated the presence of a lymphangioma. Interestingly, heterotopic gastric mucosa was present in the epithelium overlying the lymphangioma.
Conclusions: Dysphagia was successfully relieved with a minimally invasive esophagectomy and lymphangioma of the cervical esophagus was found to be the cause of obstruction and aspiration in this patient, who was a non-responder to endoscopic dilatation. The inlet patch was an incidental finding unrelated to symptoms
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
Thoracoscopic removal of dental prosthesis impacted in the upper thoracic esophagus
Full text linkDental appliances are the most common cause of accidental foreign body esophageal impaction, especially in the elderly population with decreased oral sensory perception. A 47-year-old man with history of oligophrenia and recurrent epileptic seizures was referred to our hospital following dislocation and ingestion of his upper dental prosthesis. Endoscopic removal and clipping of an esophageal tear had been unsuccessfully attempted. A chest CT scan confirmed entrapment of the dental prosthesis in the upper thoracic esophagus, the presence of pneumomediastinum, and the close proximity of one of the metal clasps of the prosthesis to the left subclavian artery. A video-assisted right thoracoscopy in the left lateral decubitus position was performed and the foreign body was successfully removed. The patient was then allowed to wear the retrieved prosthesis after dentistry consultation and repair of the wire clasps by a dental technician. At the 6-month follow-up visit the patient was doing very well without any trouble in swallowin
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