1,720,970 research outputs found
Outcomes of revision surgery after periprosthetic shoulder infection: a systematic review
No full textScarf osteotomy for the treatment of moderate to severe hallux valgus: analysis of predictors for midterm outcomes and recurrence
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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
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
End-stage ankle osteoarthritis: arthroplasty offers better quality of life than arthrodesis with similar complication and re-operation rates—an updated meta-analysis of comparative studies
No full textPurpose: Ankle arthrodesis (AA) has traditionally been the surgical standard for patients with an end-stage ankle osteoarthritis, with total ankle arthroplasty (TAA) recently becoming an alternative. The aim of this study was to update evidence in terms of functional outcomes, complications, and quality of life between AA and TAA by analyzing comparative studies. Methods: PubMed, MEDLINE, Scopus, and Cochrane Central databases were used to search keywords. A total of 21 studies entered our qualitative and quantitative analysis. Demographics, functional outcomes, and complications were extracted. Random and fixed-effect models were used for the meta-analysis of standardized mean differences (SMDs) and odds ratios (ORs). Results: A total of 18,448 patients were identified, with a mean age of 57.3 ± 11.3 years. TAA showed significantly greater post-operative range of motion (SMD − 0.883, 95% CI − 1.175 to − 0.590; I2 < 0.001) and Ankle Osteoarthritis Scale scores (SMD − 1.648, 95% CI − 3.177 to − 0.118; I2 = 97.67), but no differences in other patient-reported outcome scores were found. Patients undergoing TAA showed higher post-operative SF-36 (SMD − 0.960, 95% CI − 1.584 to − 0.336; I2 = 68.77). The total complication rate was similar between the two procedures (OR 0.936, 95% CI 0.826 to 1.060; I2 = 87.44), including the incidence of re-operations (OR 1.720, 95% CI 0.892 to 3.316; I2 = 77.65). Conclusion: While TAA and AA showed no differences in most post-operative functional outcomes, our review demonstrates that patients undergoing TAA show better health-related quality of life than AA. We found no evidence to suggest that TAA carries a higher risk of complications and re-operations compared to AA
The use of a surgical helmet system with a high-efficiency particulate air filter as possible protection equipment during the coronavirus disease 2019 pandemic: a double-blinded randomized control study
No full textPurpose: The rapid spread of coronavirus disease 2019 (COVID-19) has increased the use of personal protective equipment. The purpose of this study was to investigate whether a commercially available sterile surgical helmet system (SSHS) can be considered protective against COVID-19 and therefore safe for use. Methods: A double-blinded randomized controlled study was performed to investigate the efficacy of the ViVi® SSHS with a high-efficiency particulate air filter called HFD Hood (THI, Total Healthcare Innovation GmbH, Feistritz im Rosental, Austria) to protect against respiratory droplets. Forty recruited participants were divided into two different groups. The SSHS was tested using a validated qualitative test for respirator masks through saccharin or placebo solutions based on random allocation into two cohorts. Saccharin droplets are a validated surrogated marker for any elements of viral size, such as coronaviruses. A positive report of sweet taste after saccharin exposure was suggestive of ViVi® SSHS inefficacy in protection against droplets. Results: One participant out of 21 (4.8%) reported positive for taste within the placebo cohort, while five out of 19 (26.3%) reported positive for taste within the saccharin cohort upon testing. Two out of 21 (9.5%) participants reported positive for taste within the placebo cohort, and two out of 19 (10.5%) reported positive for taste within the saccharin cohort upon retesting. There were no statistically significant differences between the saccharin and placebo groups in either the test or retest measurements (p = 0.085 and p = 1.000, respectively). Conclusions: This study demonstrates that the ViVi® SSHS equipped with HFD Hood protects against respiratory droplets, increasing protection against several microorganisms, including the virus that causes COVID-19, allowing surgeons to carry out procedures on COVID-positive patients in a more comfortable and safer way
Single- versus double-incision technique for the treatment of distal biceps tendon rupture
No full textAIMS: The aim of this systematic review and meta-analysis is to evaluate differences in functional outcomes and complications between single- (SI) and double-incision (DI) techniques for the treatment of distal biceps tendon rupture. METHODS: A comprehensive search on PubMed, MEDLINE, Scopus, and Cochrane Central databases was conducted to identify studies reporting comparative results of the SI versus the DI approach. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement was used for search strategy. Of 606 titles, 13 studies met the inclusion criteria; methodological quality was assessed with the Newcastle-Ottawa scale. Random- and fixed-effects models were used to find differences in outcomes between the two surgical approaches. The range of motion (ROM) and the Disabilities of the Arm, Shoulder and Hand (DASH) scores, as well as neurological and non-neurological complications, were assessed. RESULTS: A total of 2,622 patients were identified. No significant differences in DASH score were detected between the techniques. The SI approach showed significantly greater ROM in flexion (standardized mean difference (SMD) -0.508; 95% confidence interval (CI) -0.904 to -0.112) and pronation (SMD -0.325, 95% CI -0.637 to -0.012). The DI technique was associated with significantly less risk of lateral antebrachial cutaneous nerve damage (odds ratio (OR) 4.239, 95% CI 2.171 to 8.278), but no differences were found for other nerves evaluated. The SI group showed significantly fewer events of heterotopic ossification (OR 0.430, 95% CI 0.226 to 0.816) and a lower reoperation rate (OR 0.503, 95% CI 0.317 to 0.798). CONCLUSION: No significant differences in functional scores can be expected between the SI and DI approaches after distal biceps tendon repair. The SI approach showed greater flexion and pronation ROM and a lower risk of heterotopic ossification and reoperation. The DI approach was favourable in terms of lower risk of neurological complications. Cite this article: Bone Joint J 2020;102-B(12):1608-1617
Arthroscopic Latarjet for Primary Shoulder Instability With Off-Track Lesions or Revision Surgery Yields Satisfactory Clinical Results and Reliable Return to Sport and Work at Minimum 3-Year Follow-Up
No full textPurpose: To retrospectively evaluate clinical and radiologic outcomes and return to sport and to work of patients after arthroscopic Latarjet stabilization for primary instability or revision surgery; factors influencing and determining results and potential predictors for clinical outcomes also were evaluated. Methods: This is a retrospective study including patients older than 18 years old who underwent arthroscopic Latarjet stabilization for recurrent anterior glenohumeral instability with off-track lesions, or for cases of recurrence after previous surgery, from 2011 to 2017. Patients were assessed preoperatively and at a minimum 3 years of follow-up using the Rowe score, the University of California at Los Angeles Shoulder Score and Simple Shoulder Test score; the range of motion, satisfaction rate, return to work and sport, perception of discomfort during sporting and daily activities, and complications and recurrence after surgery were also evaluated. The integration of the coracoid graft and the position of the screws were examined by computed tomography scan. Results: At a mean follow-up time of 6 ± 2 years, 93 patients (95 shoulders) showed significant improvement of all scale scores (P < .001), 97.8% of the patients had returned to the same working condition as before surgery, and all the patients who practiced sports preoperatively (85; 91.4%) returned to sport after surgery; 97.9% of patients were satisfied with surgery. The complication rate was 5.4%, and 2 cases (2.1%) of recurrence occurred, both after high-energy trauma. At an average of 17 ± 13 months postoperatively, computed tomography scans showed 4 (6.6%) stable nonunions, 9 (14.8%) superior, and 1 (1.6%) inferior lyses of the graft; a correct positioning of the graft was observed in 86.9% of the cases. Greater satisfaction, fewer complications, less pain during daily activities, and a lower number of reoperations were associated with a shorter time between the first dislocation episode and surgery (P = .019, P < .001, P = .014, and P = .005, respectively). Complications were directly associated with older patient age at operation (P = .001). A greater number of nonunions was found in patients with increased angle between the line linking the posterior and anterior glenoid rim and the screw axis (P = .040) and a medial axial position or a lower coronal position of the graft (both P = .010). A lower age at the time of surgery predicted better Rowe scores at follow-up (P < .001), and a lower age at the time of the first episode of dislocation predicted better postoperative Simple Shoulder Test scores (P = .026). Conclusions: At a mean 6-year follow-up time, excellent clinical outcomes, and radiological results, with few complications, high rates of satisfaction and return to work and sport and low sports anxiety can be expected after arthroscopic Latarjet procedure. A shorter time between the first dislocation episode and surgery was associated with higher satisfaction, fewer complications, less pain during daily activities and lower reoperations; a lower age at the operation was associated with lower complications
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