1,720,979 research outputs found
Primary hyperparathyroidism: successful parathyroidectomy and persistently elevated intact PTH.
No full textIndications for adrenalectomy in the laparoscopic era.
No full textThe tilt from open to laparoscopic surgery seems to be definite in most adrenal disorders. The aim of this study is to evaluate the current indications for laparoscopy and the persistent indications for open adrenalectomy, as seen in our experience and in the literature data. Between January 1985 and December 1999, 486 patients were operated on for adrenalectomy. Since January 1994, 91 laparoscopic adrenalectomies were performed in 84 patients. The Authors retrospectively evaluated the indications for laparoscopy in 55 patients (45.9%) and for open adrenalectomy in 65 others (54.1%) operated on in the last three years. Exclusion criteria for the laparoscopic approach included clinical suspicion of malignancy and tumour size greater than 6 cm, in the 38.5% and in the 23.0% of cases respectively. In Authors experience the laparoscopic adrenalectomy is the procedure of the choice for the surgical removal of non-malignant, unilateral or bilateral tumours under 6 or 7 cm. The laparoscopy is not a radical operation for cancer. Open surgery is always indicated for large and malignant tumours. The fascinating feature of laparoscopy has not to change the indications and the surgeon must plan the appropriate approach for every single patien
Valeurs « normales » des méthoxyamines plasmatiques en situation d’insuffisance rénale et de stress périopératoire : conséquences pour le diagnostique étiologique d’une hypertension artérielle.
No full textNormal values of plasma methoxyamines in the setting of renal insufficiency and peri-operative stress. Consequences for the etiological diagnosis of hypertension
No full textINTRODUCTION:
HPLC plasma methoxyamines measurements are the updated technique for the diagnosis of adrenergic hypersecretion. Their reliability meets that of urinary measurements. Significance of increased values is not yet fully established for the etiological diagnosis of hypertension in some situations, especially in case of renal insufficiency and in the peri-operative period. The aim of this study is to define the "normal" range of the values of plasma methoxyamines in both of those conditions.
PATIENTS AND METHODS:
in a General and Endocrine Surgical Unit, 3 homogeneous group of 20 patients each have been studied: group 1, control (patients awaiting thyroidectomy); group 2, patients on maintenance hemodialysis submitted for hyperparathyroidism; group 3, patients submitted to digestive surgery. Measurements were done pre-operatively in group 1, pre and post-operatively in group 2, and post-operatively in group 3.
RESULTS:
in comparison to the control (11.8 nmol/l), we observed in group 2 a 18 fold increase preoperatively, and a 29 fold increase at post-operative day 1. In group 3, we observed a 2.3, 2.7 and 2 fold increase at post-operative days 1,2 and 3 respectively. All those results were statistically significant.
CONCLUSION:
Results of measurements of plama methoxyamines should always be matched to the serum creatinine levels. They are meaningful for the diagnosis of endocrine origin of hypertension only late after the early post-operative period
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
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