1,720,967 research outputs found
Periacetabular osteotomy. Good pain relief in symptomatic hip dysplasia, 32 patients followed for 4 years.
No full textBackground When surgical treatment of dysplastic
hip osteoarthrosis is necessary, osteotomy is preferable
to fusion or THR. We evaluated periacetabular osteotomy
as a method of choice.
Patients and methods We treated 36 symptomatic
dysplastic hip joints (32 patients) with the Bernese
periacetabular osteotomy (PAO) between 1994 and
2001. We used the ilio-inguinal (I-I) approach in 32 hips
and a modified Smith-Petersen (S-P) approach in 4. The
patients were followed for mean 4 (1.5–8) years. In 1
patient with coxa valga, a varus femoral osteotomy was
performed 1 year after PAO. 2 hips, in which we used
the modified S-P approach, necessitated a capsulotomy.
Results The median Merle d’Aubignè score
increased from 13 points preoperatively to 16 points
postoperatively. This improvement in terms of pain,
motion and ambulation was accompanied by spatial
reorientation and correction. The lateral center edge
angle of Wiberg (CE) improved from an average of 7°
to 28°. The anterior center edge angle of Lequesne (FP)
improved from an average of 18° to 28°. The acetabular
index angle (AC) improved from an average of 22° to
10°.
Major complications included 1 partial lesion of the
sciatic nerve, 1 malunion and 1 combined nonunion of
the pubic and ischiatic osteotomy. 2 patients underwent
subsequent total hip replacement (THR) for progressive
osteoarthrosis with pain.
Interpretation We found good radiographic correction
of deformities, improvement of hip function and
pain relief with an acceptable complication rate. With
appropriate patient selection, this procedure is the most
physiological treatment of symptomatic hip dysplasia in
young adults. In addition to relieving symptoms, it may
prevent and postpone the development of secondary
osteoarthrosis
Periacetabular osteotomy of the hip: the ilioinguinal approach.
No full textDevelopmental hip dysplasia (DDH) is characterized by an anomalous growth of the hip joint.
Without adequate treatment, the natural history of DDH is development of secondary osteoarthritis in
adulthood. The correction of the deformities modifies the biomechanics of the hip, which is important in order
to slow down the progression of osteoarthritis and maybe to prevent and postpone this development. The
Bernese periacetabular osteotomy is a procedure which reorientates the acetabular articular surface. Several
surgical approaches have been used to achieve the same effective osteotomy. No surgical approach represents
“the optimum”, with selection of appropriate exposure representing a balance of advantages and disadvantages.
We used the ilioinguinal approach in 32 periacetabular osteotomies for acetabular dysplasia performed
between 1996 and 2002. The operation was successful in 30 patients with acceptable operation time and
blood loss and few complications. The advantages and disadvantages with the ilioinguinal approach as compared
to other possibile incisions are discussed
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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