1,721,111 research outputs found
A large osteichthyan vertebra frim the Eocene of Antarctica
Full text linkFil: Cione, Alberto Luis. Facultad de Ciencias Naturales y Museo, Universidad Nacional de La PlataFil: Reguero, Marcelo Alfredo. Facultad de Ciencias Naturales y Museo, Universidad Nacional de La PlataFil: Elliot, David H.
Subacute nerve compressions after trauma and surgery of the hand
No full textBACKGROUND: It is accepted that major injuries of the upper limb may require not only fasciotomies but also nerve decompressions. That nerve compression(s) may occur after less dramatic injuries and "routine" surgery distal to the elbow is less well documented in the literature but well known to experienced clinicians. The aim of this study was to identify a possible link between injuries or elective surgery to the distal upper limb and "subacute nerve compressions." METHODS: Over a 5-year period, data of patients who developed clinical symptoms of nerve compressions distal to the elbow within 6 months after trauma or elective surgery to the same upper limb that affected postoperative management were collected prospectively. RESULTS: This study identified 91 patients (49 after trauma and 42 after elective surgery). Compression of the median nerve in the carpal tunnel was the most common syndrome (73 cases). Fasciectomy for Dupuytren's disease was the most frequent operation involved (23 cases). The average time from injury or surgery to diagnosis of nerve compression(s) was 8 weeks (range, 1 to 24 weeks). Surgical decompression of the involved nerves was performed in 43 patients (47.2 percent), with an average time from diagnosis to surgery of 30.4 weeks (range, 28 to 44 weeks). In the carpal tunnel syndrome group (47 men and 26 women), mean age was 49 years (men, 48 years; women, 50 years) and the male-to-female ratio was 1.8:1. CONCLUSION: Subacute nerve compressions should be considered as a complication during the recovery period after injury and surgery of the upper limb. ©2007American Society of Plastic Surgeons
A New Abductor Pollicis Longus Suspension Arthroplasty
No full textPurpose: Surgical treatment of osteoarthritis of the first carpometacarpal joint aims to achieve complete pain relief with restoration of thumb strength and stability. The aim of this study was to introduce a variation of the abductor pollicis longus (APL) sling arthroplasty and to determine its efficacy in comparison with other tendon sling arthroplasty procedures. Methods: Between January 1999 and December 2003, 104 trapeziectomies in 74 consecutive patients (30 bilateral cases) were performed using a new APL sling arthroplasty. Patients were evaluated at 6 and 12 months after surgery. The outcomes were analyzed subjectively by questionnaire and objectively by clinical and radiographic evaluation. Results: After 6 months, excellent results in terms of pain relief were achieved in 95 thumbs (91%) of 65 patients. The remaining 9 thumbs had ongoing pain and had a secondary surgery performed between 6 and 12 months after the initial surgery. Pain relief was achieved in 1 thumb by scaphotrapezoid arthrodesis and in the other 8 thumbs by excision of the osteophyte on the ulnar-volar surface of the base of the first metacarpal, which was impinging on the base of the second metacarpal or the trapezoid. The gap was filled with a palmaris tendon anchovy. After 12 months, the 65 patients with successful trapeziectomies and APL sling remained pain-free. In these patients tip pinch, key pinch, and power grip strength increased by 46%, 19%, and 41%, respectively, from the preoperative values. In the 35 unilateral cases, tip pinch, key pinch, and power grip strength increased from 53%, 77%, and 65% of the contralateral hand strength before surgery to 82%, 89%, and 90%, respectively. Conclusions: This modified APL sling arthroplasty is a new and effective way of creating a suspension sling with the APL tendon after trapeziectomy, with results comparable or better than other published methods, for the treatment of osteoarthritis of the first carpometacarpal joint. Type of study/level of evidence: Therapeutic, Level IV. © 2007 American Society for Surgery of the Hand
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
Correction of swan neck deformity in rheumatoid arthritis using a new lateral extensor band technique
No full textSwan neck deformity is a progressive and disabling condition that commonly affects rheumatoid arthritic hands. During a 4-year period, 101 fingers in 43 patients had this deformity corrected using a new procedure combining the distally based extensor lateral band technique described by Littler and the flexor digitorum superficialis (FDS)-palmar plate pulley introduced by Zancolli. The ranges of motion of the metacarpophalangeal, proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints were assessed pre-operatively and 12 months after surgery. An average PIP joint hyperextension of -13.3° was converted to +13.4°. The ranges of motion of the proximal and DIP joints were significantly different (Student's t-test). No patient suffered recurrence of the deformity during an average follow-up of 20 months. This new technique improves some unappealing aspects of previous techniques and provides a stable and reliable correction of swan neck deformity
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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