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Meniscal Extrusion Progresses Shortly after the Medial Meniscus Posterior Root Tear
Takayuki Furumatsu,Yuya Kodama,Yusuke Kamatsuki,Tomohito Hino,Yoshiki Okazaki,Toshifumi Ozaki 대한슬관절학회 2017 대한슬관절학회지 Vol.29 No.4
Purpose: Medial meniscus posterior root tears (MMPRT) induce medial meniscus extrusion (MME). However, the time-dependent extent of MME in patients suffering from the MMPRT remains unclear. This study evaluated the extent of MME after painful popping events that occurred at the onset of the MMPRT. Materials and Methods: Thirty-five patients who had an episode of posteromedial painful popping were investigated. All the patients were diagnosed as having an MMPRT by magnetic resonance imaging (MRI) within 12 months after painful popping. Medial meniscus body width (MMBW), absolute MME, and relative MME (100×absolute MME/MMBW) were assessed among three groups divided according to the time after painful popping events: early period (<1 month), subacute period (1–3 months), and chronic period (4–12 months). Results: In the early period, absolute and relative MMEs were 3.0 mm and 32.7%, respectively. Absolute MME increased up to 4.2 mm and 5.8 mm during the subacute and chronic periods, respectively. Relative MME also progressed to 49.2% and 60.3% in the subacute and chronic periods, respectively. Conclusions: This study demonstrated that absolute and relative MMEs increased progressively within the short period after the onset of symptomatic MMPRT. Our results suggest that early diagnosis of an MMPRT may be important to prevent progression of MME following the MMPRT.
( Takayuki Furumatsu ),( Keisuke Kintaka ),( Naohiro Higashihara ),( Masanori Tamura ),( Koki Kawada ),( Haowei Xue ),( Toshifumi Ozaki ) 대한슬관절학회 2023 대한슬관절학회지 Vol.35 No.-
Background Patients with partial medial meniscus posterior root tears (MMPRTs) sometimes require arthroscopic pullout repair because of their intolerable/repeated knee pains and continuous disturbance in gait during activities of daily living. However, the predisposing factors for future knee surgery in patients with partial MMPRTs remain unclear. We compared the findings of magnetic resonance imaging (MRI) between patients who underwent pullout repair and nonoperative management following partial MMPRTs. Methods Twenty-five patients who required arthroscopic repair for partial MMPRTs and 23 patients who were managed nonoperatively were evaluated during a mean follow-up period of 27.1 months. Sex, age, height, body weight, body mass index, duration from onset to initial MRI, MRI findings, and medial meniscus (MM) extrusion were compared between the two groups. Linear regression analysis was used to assess the correlation between MM extrusion and duration from onset to MRI examination. Results No significant differences were observed between the pullout repair and nonoperative management groups in terms of patient demographics and the positive ratio of MRI-based root tear signs. However, absolute MM extrusion in the pullout repair group (3.49 ± 0.82 mm) was larger than that in the nonoperative management group (2.48 ± 0.60 mm, P < 0.001). Extrusion of the MM ( > 3 mm) was detected more frequently in the pullout repair group than in the nonoperative management group (P < 0.001). The odds ratio in the pullout repair and MM extrusion > 3 mm cases was 9.662. Linear regression analysis revealed a fair correlation between the duration from onset to MRI and MM extrusion only in the pullout repair group (0.462 mm/month increase in MM extrusion). Conclusions This study demonstrated that more severe MM extrusions were observed in the pullout repair group than in the nonoperative management group. Major extrusion (> 3 mm) was also observed more in the pullout repair group than in the nonoperative group. Assessing MM extrusion and its severity can help determine a valid treatment for patients with partial MMPRTs. Level of evidence IV, Retrospective comparative study.
Takayuki Morita,Mitsuhiro Kimura 보안공학연구지원센터 2015 International Journal of Software Engineering and Vol.9 No.2
As our goal, we are interested in estimating the degree of software reliability based on software development project data. It is widely-known that several software development attributes which are measured can be used to evaluate and predict software reliability/quality via multi-variable analyses. In this article, we focus on the data treatment method which is needed prior to the software reliability assessment, since the software development data sets often include missing data. This paper discusses the method of data preparation against missing data and their effectiveness by using the Random Forest as a multi-variable analysis.
Interactive Questionnaire for Education through Web Media
Takayuki Shimotomai,Miwako Kamijo 영상영어교육학회 2014 영상영어교육 (STEM journal) Vol.15 No.2
The use of media in English language education has become widespread in the past couple of decades. The teaching materials available have a wide variation utilizing all broadcast media. Information which used to be collected from radio, newspaper, TV and books, also seems to be shifting to Internet information. Now, we are challenged to use the cloud and network in the latest media usage for teaching. In this paper, we aim to introduce a user friendly application, Google form in order to practice in various education contexts. The study is based on practical usage of this application but will also suggest usage by "script writing" for wider individual use. This paper introduces the basic steps and system of Google form use, and will elaborate the procedures in detail. As a branch test, we showed a structured questionnaire example. The items that can be used for this form are limited in use, but it can be customized by additional 'script usage.' However, too much customization can result in the application losing its user friendliness application. Therefore, this paper will suggest "script" examples that can be used very easily.