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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
Infection rate of intramedullary nailing for treatment of lower limb polyostotic fibrous dysplasia
No full textpolyostotic fibrous dysplasia (PFD) generally cause deformities and fractures of femur and tibia and surgery is often required. the current surgical treatment for deformities is based on single or multiple osteotomies followed by stabilization with intramedullary nails, which are commonly used also for fractures. one of the most common surgical complications of intramedullary nailing is represented by surgical site infection with possible extension to the whole skeletal segment. In the present study we evaluated the incidence of surgical site infections in 44 patients affected by PFD in which 91 femurs or tibiae underwent intramedullary nailing to treat deformities or fractures. we never observed any infection of the operated femurs or tibiae until the final follow-up. the only post surgical infection was present in a patient with monomelic involvement at the contralateral non affected limb, which was surgically treated for limb length inequality, by femur shortening osteotomy stabilized by an intramedullary nail. the most likely hypothesis to explain the complete absence of infections in these patients may be related to the high local concentration of prophylactic antibiotic in the highly vascularized fibrodysplastic bone
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
An update on osteochondritis dissecans of the knee
Full text linkOsteochondritis dissecans of the knee (OCD) is a multifactorial pathology in where repetitive microtrauma plays a central role in the etiopathogenesis. Knee MRI is indicated in young, active patients who have knee pain and/or effusion, to make an early diagnosis and decide about treatment, according essentially to the MRI stability signs. The choice of treatment should be also tailored, based on the patient’s skeletal maturity, as well as the size and location of the lesion. Conservative treatment with restricting sports activities is the first line treatment and often sufficient to ensure healing in patients with open physes. Surgical treatment depends on the persistence of symptoms after 6 months of conservative treatment and/or based on the development of signs of instability of the lesion. Stable lesions with intact articular cartilage may be treated by drilling of the subchondral bone aiming to stimulate vascular ingrowth and subchondral bone healing. Every attempt should be made to retain the osteochondral fragment when possible. Instable lesions should be fixed or “replaced” with salvage procedures to prevent the onset of early osteoarthritis in this young population. Furthers studies are needed to improve the knowledge and optimizing non-operative and surgical treatment and to develop noninvasive diagnostic tools to predict with more accuracy the fragment’s stability
Surgical correction of valgus deformities of the knee in Polyostotic Fibrous Dysplasia
No full textcoxa vara and shepherd’s crook deformity represent the most common femoral deformities in patients affected by polyostotic fibrous dysplasia (PFD) and mccune albright syndrome (MAS). the tibia is also commonly affected, with antero-medial bowing and valgus deformity. surgical treatment of these deformities are technically demanding and, in most cases, intramedullary nails are the preferred method to stabilize corrective osteotomies. genu valgus may also be present, as a residual defect after the surgical correction of the aforementioned deformities. the aim of our study was to report the outcomes obtained in five patients with PFD or MAS operated on for complex deformities of the lower limbs with an associated residual genu valgum greater than 15°. It was surgically treated by distal femoral or proximal tibial osteotomy stabilized with a screw plate. the osteotomy was performed distal to the intramedullary nail in femurs, while it was performed after removing the intramedullary nail in the proximal metaphysis of the tibia. In latter cases, the intramedullary device was reinserted at least 6 months after surgery. at follow-up, the femoro-tibial angle was corrected in all cases and the patients were satisfied with the final result. two patients showed mild limping, unrelated to the alignment of the knee. In our opinion, residual valgus deformities of the lower limb greater than 15 degrees should be corrected to improve function and cosmetic appearance of these patients. the osteotomy of the distal femur or of the proximal tibia stabilized by a screw-plate represent the treatment of choice for the correction of these deformities
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
Intraoperative Pulsed Irrigation with PovidoneIodine and Hydrogen Peroxide in Spine Surgery: A Systematic Review on its Efficacy and Low Toxicity Advantages in Preventing Surgical Site Infections
No full textbackground. surgical site infections (SSIs) are a significant complication following spine surgery, leading to increased morbidity, prolonged hospital stays, and higher healthcare costs. traditional methods to prevent SSIs, including perioperative antibiotics, have limited efficacy, necessitating innovative approaches. objective. this systematic review aims to evaluate the efficacy and low toxicity advantages of intraoperative irrigation combining three elements: povidone-iodine (PVPI), hydrogen peroxide (H2 O2), and pulsed irrigation technique in preventing SSIs in spine surgery. methods. a comprehensive literature search was conducted in MEDLINE, cochrane Library, and scopus databases, covering publications from 1980 to may 2024. articles were selected based on their relevance to the use of PVP-I and H2 O2 in pulsed irrigation during spine surgeries. while there are studies that use H2 O2 and PVP-I separately or in combination without pulsed irrigation, the combination of all three elements (pulsed irrigation, H2 O2, and betadine) has not been previously explored. the inclusion criteria focused on clinical trials, observational studies, case-control studies, cohort studies, review or case series that reported on SSI prevention with a minimum follow-up of three months. results. the review identified a significant gap in the literature concerning the combined use of PVP-I and H2 O2 in pulsed irrigation for spine surgeries. studies primarily investigated these agents individually or in combinations of two, but not all three together. the findings suggest that the combination of PVP-I and H2 O2 can enhance antimicrobial effects and reduce toxicity, potentially lowering SSI rates. conclusions. intraoperative pulsed irrigation with PVP-I and H2 O2 shows promise in reducing SSIs in spine surgery, with potential benefits over traditional methods. however, the risks associated with the use of H2 O2 require careful evaluation and prudent application, especially in the presence of dural tears. further large-scale clinical studies are needed to confirm these preliminary results and optimize protocols for the combined use of these agents
Monitoring of c-reactive protein level (Crp) and erythrocyte sedimentation rate (esr) after total hip and knee arthroplasty
No full textC-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) are the two most commonly serum biomarkers for the diagnosis of periprosthetic joint infections (PJI). we monitored CRP and ESR in 60 patients affected by osteoarthritis who underwent primary total hip or knee arthroplasty to verify their utility for an early diagnosis of periprosthetic hip and knee infections. In all but two patients, both CRP and ESR increased rapidly after surgery, reaching a peak value around the 3rd day postoperatively; CRP decreased rapidly in 20 days, reaching normal value one month after surgery, while ESR decreased slowly, reaching the normal value after three months. In two patients, CRP and ESR were still elevated six months after the surgical procedure and in both cases a diagnosis of PJI was made. our study confirms that postoperative screening of CRP and ESR values are very useful in making an early diagnosis of this serious complication
Surgical treatment of slipped capital femoral epiphysis (SCFE) by Dunn procedure modifed by Ganz: a systematic review
Full text linkbackground: treatment of SCFE is still controversial, especially in moderate and severe forms. dunn osteotomy performed with the ganz approach became very popular in the last decade, although it is a complicated and challenging surgical procedure with a risk of AVN. the aim of our study was to analyze the current literature verifying the effectiveness of this surgical procedure, with specific attention to the incidence of AVN and other complications. main body: a systematic review on the subject was performed according to the PRISMA guidelines. a literature search was performed by searching all published articles about the topic in the databases. the articles were screened for the presence of the following inclusion criteria: patients affected by slipped capital femoral epiphysis (SCFE) surgically treated by dunn osteotomy using the ganz surgical approach. all the patients affected by pathologies other than SCFE, treated without surgery or with procedures not including a surgical hip dislocation were excluded. based on inclusion and exclusion criteria, 23 studies were included in our systematic review. selected articles were published from 2009 to 2021 and they included 636 overall hips. according to the selected articles, dunn osteotomy modified by ganz, performed by an experienced surgeon, allows for anatomical reduction of moderate or severe SCFE with a low incidence of AVN. conclusions: the few papers with long term follow-up, reported no progression of hip osteoarthritis, however, since the patients are adolescent at surgery, longer follow-up studies are needed to validate this statement. It is still debated if better results are obtained in stable or unstable SCFE. the indication of this procedure in mild SCFE remains controversial. Llvel of evidence:
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