1,721,002 research outputs found
Posterior Rhabdosphincter Reconstruction During Robot-assisted Radical Prostatectomy: Critical Analysis of Techniques and Outcomes
No full textMany centers have recently implemented posterior rhabdosphincter reconstruction (PRR) into robot-assisted radical prostatectomy (RARP) with the objective of earlier continence recovery. We comprehensively review the anatomic and functional changes occurring post prostatectomy along with the reconstructive techniques and published outcomes of PRR. Several case control studies show a better continence rate within the first 3 months, whereas the only randomized control trial presents a conflicting conclusion. Unfortunately, all reported studies lack uniform surgical technique, continence definition, and measures, making comparison difficult. Although initial results appear favorable, the true continence benefit of PRR remains debatable and requires further research. UROLOGY 76: 734-742, 2010. (C) 2010 Published by Elsevier Inc
ROBOTIC SALVAGE PROSTATECTOMY FOR RADIO-RECURRENT PROSTATE CANCER
No full textIntroduction & Objectives: To demonstrate and highlight the technical difficulties
in robotic salvage prostatectomy for radio recurrent prostate cancer. We also show
the differences in technique for proton beam, external beam radiotherapy as well
as Brachytherapy.
Materials & Methods: This video exemplifies our technique for robotic salvage
prostatectomy. We show prostatectomy in patients who have undergone primary
external beam, proton beam and brachytherapy. The difference in the distortion
of anatomy, the technique of obtaining a plane in the endopelvic fascia, posterior
plane dissection, avoiding and recognizing rectal injury and nuances of apical
dissection are described.
Results: The video defines areas in which a cautious approach is necessary
and highlights techniques needed to achieve a good Oncological outcome
without complications.Though functional outcomes are not optimal the benefits of
Oncological cure out weigh’s this aspect in salvage prostatectomy.Proton Beam
radiotherapy is most difficult compared to external beam and Brachytherapy.
Brachytherapy is relatively easier but the apical dissection may be difficult if the
seeds have been placed outside the prostate.
Conclusions: Robotic salvage prostatectomy for Radiorecurrent prostate cancer
is a technically demanding procedure. There is a considerable learning curve to
achieve an acceptable level of efficacy and safety. With careful attention to detail
complications can be minimized
PREDICTIVE FACTORS AND ONCOLOGICAL OUTCOMES OF PERSISTENTLY ELEVATED PROSTATE-SPECIFIC ANTIGEN IN PATIENTS FOLLOWING ROBOT ASSISTED RADICAL PROSTATECTOMY
No full textN
Incidence of lymphoceles after robot-assisted pelvic lymph node dissection
No full textOBJECTIVE To determine the incidence and predictive factors of lymphocele formation in patients undergoing pelvic lymph node dissection (PLND) during robot-assisted radical prostatectomy (RARP). PATIENTS AND METHODS Between April and December 2008, 76 patients underwent PLND during RARP for >= cT2c, prostate-specific antigen level >= 10, Gleason score >= 7 prostate cancer. All patients were prospectively followed up with pelvic computed tomography 6-12 weeks after the procedure. All patients received s.c. heparin preoperatively and postoperatively. PLND was limited to zones 1 and 2 as defined by Studer. Plasma-kinetic bipolar forceps were used for haemostasis during PLND. RESULTS At a mean follow-up of 10.8 weeks, 51% (39/76) of patients had developed a lymphocele. Of these 39 lymphoceles 32 (82%) were unilateral and seven (18%) were bilateral. The mean (range) lymphocele size was 4.3 x 3.2 (1.5-12.3) cm; 41% of lymphoceles were 10 cm in diameter. Six of the 39 lymphoceles (15.4%) were clinically symptomatic. The symptoms were as follows: pelvic pressure in five patients, abdominal distension with ileus in three patients, leg pain/weakness in one patient and costovertebral tenderness in one patient. Two lymphoceles required intervention. On the logistic regression model the presence of nodal metastases, tumour volume in the prostate specimen and extracapsular extension (ECE) were independent risk factors for the development of a lymphocele. There was no correlation between estimated blood loss, body mass index, pathological Gleason score or number nodes dissected and the presence of lymphocele. CONCLUSIONS The incidence of lymphoceles was higher than anticipated given the believed protective effect of the transperitoneal approach against lymphocele formation. The risk of lymphocele seemed to increase linearly with the presence of more extensive disease, particularly ECE and nodal involvement. The benefit of PLND during RARP should be weighed against the elevated risk of lymphocele formation and its potential complications
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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