1,720,957 research outputs found
Vascularized growth plate transfer for distal radius reconstruction
No full textDistal radius reconstruction in children should meet two requests: restoration of some joint function and preservation of the physiologic growth of the segment. None of the conventional options is likely to successfully achieve both goals. Conversely, a vascularized transfer of the proximal fibula including the growth plate provides enough bone stock for diaphyseal reconstruction, an articular surface for joint function, and the potential for longitudinal growth. From 1992 to 2006, eight children ranging in age between 2 and 10 years underwent a vascularized transfer of the proximal fibula for distal radius recon- struction after bone sarcoma resection. The follow-up ranges were between 1 year and 15 years. All the grafts were harvested based on the anterior tibial artery. Seven cases with a follow-up longer than 2 years have been evaluated both clinically and radiographically. All the grafts survived and had a satisfactory growth after the transplant. The functional outcome has been satisfactory, and the range of motion of the reconstructed wrist has been nearly normal in all cases but one. Proximal fibular epiphyseal transfer was an effective procedure for distal radius reconstruction in children who underwent tumor resection. Refinements in the operative technique have increased the reliability of this reconstructive option, which might be safely used also in congenital and posttraumatic disorders
Quadriceps muscle reconstruction with free functioning latissimus dorsi muscle flap after oncological resection
No full textThe concept of limb salvage led to increased demand for more complex and sophisticated reconstructive options to achieve better functional and cosmetic outcome. Reconstruction of the total or partial loss of quadriceps muscle after soft tissue sarcomas excision with free functioning latissimus dorsi muscle transfer had become more popular in the last years.
PATIENTS AND METHODS:
Between November 1993 and October 2004, 11 patients with average age 45.5 years underwent excision of quadriceps muscle followed by simultaneous reconstruction with free functioning latissimus dorsi muscle. There were six men and five women. The tumors were high grade in 90.9% of patients and were >10 cm in 81.8% of patients. The tumor extension required the resection of the entire quadriceps in four cases, of three heads in six cases, of only two heads in one case.
RESULTS:
The average follow up was 69 months. The average time of recovery of the contractile activity of the muscle was 8.3 months after operation. The musculoskeletal tumor society rating score (MTSRS) scored excellent or good in 73% of patients. Three patients (27.3%) died of metastatic disease. Local recurrence occurred in one patient (9.1%). Limb salvage was achieved in all the patients (100%).
CONCLUSION:
This method of reconstruction is a reliable technique not only to fill the defect resulting from oncological resection but also to provide better function. Microsurgical reconstruction of soft tissue sarcoma helps to expand the indications of limb salvage by allowing better local control and achieving adequate function and coverage
The difficult primary total knee arthroplasty: a review
No full textPrimary total knee arthroplasty (TKA) is a reliable procedure with reproducible long-term results. Nevertheless, there are conditions related to the type of patient or local conditions of the knee that can make it a difficult procedure. The most common scenarios that make it difficult are discussed in this review. These include patients with many previous operations and incisions, and those with severe coronal deformities, genu recurvatum, a stiff knee, extra-articular deformities and those who have previously undergone osteotomy around the knee and those with chronic dislocation of the patella. Each condition is analysed according to the characteristics of the patient, the pre-operative planning and the reported outcomes. When approaching the difficult primary TKA surgeons should use a systematic approach, which begins with the review of the existing literature for each specific clinical situation
Quadriceps muscle reconstruction with free functioning latissimus dorsi muscle flap
No full textNTRODUCTION:
The concept of limb salvage led to increased demand for more complex and sophisticated reconstructive options to achieve better functional and cosmetic outcome. Reconstruction of the total or partial loss of quadriceps muscle after soft tissue sarcomas excision with free functioning latissimus dorsi muscle transfer had become more popular in the last years.
PATIENTS AND METHODS:
Between November 1993 and October 2004, 11 patients with average age 45.5 years underwent excision of quadriceps muscle followed by simultaneous reconstruction with free functioning latissimus dorsi muscle. There were six men and five women. The tumors were high grade in 90.9% of patients and were >10 cm in 81.8% of patients. The tumor extension required the resection of the entire quadriceps in four cases, of three heads in six cases, of only two heads in one case.
RESULTS:
The average follow up was 69 months. The average time of recovery of the contractile activity of the muscle was 8.3 months after operation. The musculoskeletal tumor society rating score (MTSRS) scored excellent or good in 73% of patients. Three patients (27.3%) died of metastatic disease. Local recurrence occurred in one patient (9.1%). Limb salvage was achieved in all the patients (100%).
CONCLUSION:
This method of reconstruction is a reliable technique not only to fill the defect resulting from oncological resection but also to provide better function. Microsurgical reconstruction of soft tissue sarcoma helps to expand the indications of limb salvage by allowing better local control and achieving adequate function and coverage
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
Quadriceps muscle reconstruction with free functioning latissimus dorsi muscle flap after oncological resection
No full textIntroduction: The concept of limb salvage led to increased demand for more complex and sophisticated reconstructive options to achieve better functional and cosmetic outcome. Reconstruction of the total or partial loss of quadriceps muscle after soft tissue sarcomas excision with free functioning latissimus dorsi muscle transfer had become more popular in the last years. Patients and methods: Between November 1993 and October 2004, 11 patients with average age 45.5 years underwent excision of quadriceps muscle followed by simultaneous reconstruction with free functioning latissimus dorsi muscle. There were six men and five women. The tumors were high grade in 90.9% of patients and were >10 cm in 81.8% of patients. The tumor extension required the resection of the entire quadriceps in four cases, of three heads in six cases, of only two heads in one case. Results: The average follow up was 69 months. The average time of recovery of the contractile activity of the muscle was 8.3 months after operation. The musculoskeletal tumor society rating score (MTSRS) scored excellent or good in 73% of patients. Three patients (27.3%) died of metastatic disease. Local recurrence occurred in one patient (9.1%). Limb salvage was achieved in all the patients (100%). Conclusion: This method of reconstruction is a reliable technique not only to fill the defect resulting from oncological resection but also to provide better function. Microsurgical reconstruction of soft tissue sarcoma helps to expand the indications of limb salvage by allowing better local control and achieving adequate function and coverage. © 2008 Wiley-Liss, Inc
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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