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Itoh Yasunobu,Kitagawa Ryo,Numazawa Shinichi,Yamakawa Kota,Yamada Osamu,Akasu Isao,Sakai Jun,Otomo Tomoko,Yoshida Hirotaka,Mori Kentaro,Watanabe Sadayoshi,Watanabe Kazuo 대한척추외과학회 2023 Asian Spine Journal Vol.17 No.3
In C1–C2 posterior fixation, the C1 lateral mass and C2 pedicle/translaminar screw insertion under spine navigation have been used frequently. To avoid the risk of neurovascular damage in atlantoaxial stabilization, we assessed the safety and effectiveness of a preoperative computed tomography (CT) image-based navigation system with intraoperative independent C1 and C2 vertebral registration. It is ideal when a reference frame can be linked directly to the C1 posterior arch for C1-direct-captured navigation, but there is a mechanical challenge. A new spine clamp-tracker system was implemented recently, which allows reliable C1- and C2- direct-captured navigation in nine patients with traumatic C2 fractures. In this way, there was no misalignment of C1–C2 screws. C1 lateral mass screws were used except for one case, and translaminar screws were primarily used as an anchor for C2. The C1 lateral mass screw locations, which are 19 mm laterally from the C1 posterior arch’s center, are taken to be constant. However, there is one unusual circumstance in which using a C1 laminar hook instead of a C1 lateral mass screw appears to be a beneficial substitute. The increase of surgical accuracy for posterior C1–C2 screw fixation without cost constraints is significantly facilitated by intraoperative C1- and C2-direct-captured navigation with preoperative computed CT images.
Yuji Ikeda,Akiko Furusawa,Ryo Kitagawa,Aya Tokinaga,Fuminori Ito,Masayo Ukita,Hidetaka Nomura,Wataru Yamagami,Hiroshi Tanabe,Mikio Mikami,Nobuhiro Takeshima,Nobuo Yaegashi 대한부인종양학회 2016 Journal of Gynecologic Oncology Vol.27 No.3
Objective: Although radiation therapy (RT) and concurrent chemoradiotherapy (CCRT)are the global standards for adjuvant therapy treatment in cervical cancer, many Japaneseinstitutions choose chemotherapy (CT) because of the low frequency of irreversible adverseevents. In this study, we aimed to clarify the trends of adjuvant therapy for intermediate/highriskcervical cancer after radical surgery in Japan. Methods: A questionnaire survey was conducted by the Japanese Gynecologic OncologyGroup to 186 authorized institutions active in the treatment of gynecologic cancer. Results: Responses were obtained from 129 facilities. Adjuvant RT/CCRT and intensitymodulatedRT were performed in 98 (76%) and 23 (18%) institutions, respectively. On theother hand, CT was chosen as an alternative in 93 institutions (72%). The most commonregimen of CT, which was used in 66 institutions (51%), was a combination of cisplatin/carboplatin with paclitaxel. CT was considered an appropriate alternative option to RT/CCRTin patients with risk factors such as bulky tumors, lymph node metastasis, lymphovascularinvasion, parametrial invasion, and stromal invasion. The risk of severe adverse events wasconsidered to be lower for CT than for RT/CCRT in 109 institutions (84%). Conclusion: This survey revealed a variety of policies regarding adjuvant therapy amonginstitutions. A clinical study to assess the efficacy or non-inferiority of adjuvant CT iswarranted.
Estimation of Quantity of Cl-from Deicing Salts on Weathering Steel Used for Bridges
Masamichi Takebe,Makoto Ohya,Shota Ajiki,Takashi Furukawa,Ryo Adachi,Rumiko Gan-ei,Naoki Kitagawa,Junya Ota,Yasuhiko Matsuzaki,Toshihiko Aso 한국강구조학회 2008 International Journal of Steel Structures Vol.8 No.2
To estimate the contribution of Cl from deicing salt (CaCl2) on weathering steel on a bridge in southwestern Japan, therelationship among the quanties of Cl, SO42 and Ca2+ on girders is examined. The composition of the ions on girder showsseasonal variation, and the Ca2+ and Cl on the western second girder are enriched with a ratio coresponding to CaCl2 in winter,suggesting that CaCl2 2 is more 50 % of totalchlorine ion and the corosion is more enhanced on the second girder.
( Yoko Nunome ),( Hyun Kook Park ),( Kenji Kodama ),( Yasuaki Ueki ),( Ryo Yoshiie ),( Sang Chun Lee ),( Kuniyuki Kitagawa ),( Ichiro Naruse ) 경남대학교 신소재연구소 2013 신소재연구 Vol.25 No.-
Toxic volatile organic compounds (VOCs) have serious implications for the environment and human health. An analytical method for the rapid, direct detection of VOCs without any sample pretreatment was successfully developed by combining soft plasma ionization (SPI) with time-of-flight mass spectrometry (TOFMS). The SPI source, based on Ref. 1 and re-designed for this work, is shown schematically in Fig. 1. Vapor from a liquid sample was diluted to a ratio selected in accordance with the amount of ambient air. To achieve softer ionization of VOCs by the SPI method, discharge parameters (current and pressure) were varied to determine the optimal experimental conditions. Use of ambient air as the discharge gas was the aim for practical in situ analysis. Optimal conditions for the SPI source were determined to be: sample dilution ratio, R = 0.30; discharge current, 50 mA; and ambient air pressure, 1000 Pa. All mass spectra of the the organic solvents exhibited molecular ion base peaks, which demonstrated the achievement of soft ionization by the SPI method. From these results, an ionization mechanism in the SPI-TOFMS system was suggested in which excitation of N2 would facilitate the ionization of sample molecules. It is noteworthy that the SPI-TOFMS system enabled highly soft ionization by using practical ambient air as the discharge gas rather than cylinder gas. Therefore, this SPI-TOFMS system was validated and was well suited for the in situ on-line monitoring of VOCs. Further work will be necessary to evaluate quantification methods for the accuracy and reproducibility of our measurements.
Satoshi Kato,Satoru Demura,Yuki Kurokawa,Naoki Takahashi,Kazuya Shinmura,Noriaki Yokogawa,Noritaka Yonezawa,Takaki Shimizu,Ryo Kitagawa,Hiroyuki Tsuchiya 대한재활의학회 2020 Annals of Rehabilitation Medicine Vol.44 No.3
Objective To examine the efficacy and safety of an innovative, device-driven abdominal trunk muscle strengthening program, with the ability to measure muscle strength, to treat chronic low back pain (LBP) in elderly participants. Methods Seven women with non-specific chronic LBP, lasting at least 3 months, were enrolled and treated with the prescribed exercise regimen. Patients participated in a 12-week device-driven exercise program which included abdominal trunk muscle strengthening and 4 types of stretches for the trunk and lower extremities. Primary outcomes were adverse events associated with the exercise program, improvement in abdominal trunk muscle strength, as measured by the device, and improvement in the numerical rating scale (NRS) scores of LBP with the exercise. Secondary outcomes were improvement in the Roland-Morris Disability Questionnaire (RDQ) score and the results of the locomotive syndrome risk test, including the stand-up and two-step tests. Results There were no reports of increased back pain or new-onset abdominal pain or discomfort during or after the device-driven exercise program. The mean abdominal trunk muscle strength, NRS, RDQ scores, and the stand-up and two-step test scores were significantly improved at the end of the trial compared to baseline. Conclusion No participants experienced adverse events during the 12-week strengthening program, which involved the use of our device and stretching, indicating the program was safe. Further, the program significantly improved various measures of LBP and physical function in elderly participants.