1,720,964 research outputs found
Pseudoaneurisma dell’arteria tibiale posteriore come complicazione nell'uso del fissatore esterno. Descrizione di un caso clinico
No full textPersonal experience in one case of false aneurysm as complication of external fixation technique in the treatment of psedoarthrosis is reported. A 36-year-old man developed a psedoarthrosis in the posterior tibial artery after two months of treatment of type III psedoarthrosis with Ilizarov-like device. This study highlights the risk in developing this complication when external stabilizer is applied to a limb with a long surgical history, with alteration of the vascular anatomy of the district. The importance of arteriography is also stressed as a diagnostic exam and preventive tool for the study of that particular vascular district. Moreover, different treatment options are presented for this complication
Artroplastica di resezione come chirurgia alternativa nel gomito rigido
No full textBackgound. Aim of this paper is to present the technique for the treatment of painful subankylosis of the elbow, as a complication of severe infection, rheumatoid arthritis, and, more frequently, trauma. This technique is a valid alternative to arthrodesis, a procedure with severe functional limitation, and to arthro-prosthesis, which, even now, is often accompanied by secondary complications.
Methods. Twelve patients, with an average age of 36 years, were treated with resection arthroplasty, nine were male and three were female. All patients had severe pain and functional limitation with a flexion-extension range of motion between 5 and 35 degree, due to complications from serious fractures. Eleven of the fractures were open; the minimum time between the initial trauma and the final procedure was 2.5 months. Moreover, ten cases developed an infection before coming to our attention and seven of them underwent surgery while still infected.
Results. In follow-up, recovery in three cases was evaluated as ''excellent'', six as ''good'', two as ''fair'' and one as ''poor'' (Dee modified classification). Complications included one case of heterotopic ossification and two cases of lateral instability, which required stabilization by orthesis.
The best results were obtained in young patients, who participated in an intensive post-operative rehabilitation program without strenuous activity.
Conclusions. The conclusion is drawn that this procedure is better indicated than arthrodesis or prosthesis in cases of a concomitant infection, which is resistant to antibiotic therapy.
The resection arthroplasty is a valid option for the treatment of elbows with severe limitations, rigidity and pain, secondary to serious fracture, with or without a concomitant infection
Lesioni nervose come complicazioni neurologiche nei blocchi anestesiologici regionali : un modello sperimentale
No full textThe purpose of the study was to evaluate the lesions produced by direct trauma of injection needles in the peripheral nervous trunks. Two types of needles were compared: one with a tip with a 45 degrees inclination, and one with a tip with a 14 degrees in clination. Sprague Dawley rats were used, the sciatic nerve of which had been subjected to repeated injections under direct vision; the results were collected 7, 14, and 21 days after surgery. Both macroscopic and histological observation revealed that the greatest injury was produced using needles that had a tip with a 14 degrees inclination, that was longer, while needles that had a tip with a 45 degrees inclination had a greater tendency to slip and rotate at every attempt at penetration
Colgajo en isla. Reconstrucción de pérdidas extensas de sustancia del pulpejo del pulgar
No full textEstudio de la actividad mitótica entre las fases in vitro e in vivo en el trasplante de condrocitos
No full textTransplantation of allogenic devitalized matrices carrying autologous chondrocytes previously isolated and seeded on them might solve the problem of repairing joint cartilage lesions. This study analyzes the mitotic activity of chondrocytes seeded in allogenic devitalized cartilage and implanted in living animals. Chondrocytes of joint cartilage of lambs were enzimatically isolated and seeded in vivo in allogenic devitalized matrix during three weeks. At the end of the co-culture period, the matrix compounds and chondrocytes were transplanted into subcutaneous pouches of atymic mice. Histological evaluation of the experimental and control samples was performed following incorporation of tritiated thymidine. The results showed a significant reduction in thymidine incorporation values, as of experimental moment zero (pre-implant evaluation) up to implant day 28, following by a slight increase by day 42 of the study.
This experience has shown that joint chondrocytes (seeded in vitro and then transplanted in vivo on an allogenic devitalized matrix), tend to change their own mitotic activity from very high levels, corresponding to the initial experimental days (typical of the in vitro phase of cell proliferation), to very low levels, resembling the performance of in vivo joint chondrocytes
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
Capacidad adesivo-reparativa de condrocitos articulares aislados y trasplantados in vivo
No full textABSTRACT: Repair of chondral defects using autologous chondrocyte implant assumes the synthesis of these cartilaginous matrix cells with adhesive cotential in the surface of the lesion. In this study, we evaluated the adhesive-reparative potential of chondrocytes which were enzimatically isolated, seeded in vitro in cartilaginous devitalized matrix, and implanted in vivo in subcutaneous pouches of atymic mice. Fifty atymic mice were used, with two experimental samples and two control samples; they were subdivided into 5 experimental periods corresponding to days 7, 14, 21, 28 and 42 since implant. Adhesivenes analysis in experimental samples always showed increasing values up to a highest value between days 28 and 42; while control samples had null values during the study. Histological analysis of samples revealed that the "biological adhesive component" in the experimental samples consisted of newly formed cartilage capable of promoting the adhesiveness-repair of devitalized matrix. Results showed that chondrocytes that have been isolated and seeded in allogenic devitalized matrix can produce in vivo new cartilaginous tissue with sufficient adhesive capacity to allow reciprocal adhesion on the surface of the lesion
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