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- 저자 : Hiroki Tsuchiya (검색결과 3 건)
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Yusuke Asakura,Hiroki Tsuchiya,Hisatake Mori,Takashi Yano,Yasuhide Kanayama,Hideki Takagi 대한마취통증의학회 2011 Korean Journal of Anesthesiology Vol.61 No.5
Background: Venous thromboembolism (VTE) and the subsequent development of pulmonary embolism (PE) is a major cause of post-operative mortality in total knee arthroplasty (TKA). We evaluated whether the addition of an ultrasound-guided femoral nerve block with general anesthesia affected the incidence in the development of VTE following TKA. Methods: This was a retrospective non-randomized comparative study with patients assigned to groups based on the surgery date (pre-femoral nerve block versus post-femoral nerve block periods). All anesthesia and medical records of the patients who had undergone computer-navigated TKA in our facility between January 2009 and March 2010were retrospectively reviewed. Results: Forty patients were identified; 15 patients underwent computer-navigated TKA under general anesthesia alone (Group G) and 25 patients underwent surgery under general anesthesia combined with ultrasoundguided femoral nerve block (Group F). The incidence of development of VTE post-operatively was significantly lower in Group F (P = 0.037). Logistic regression analysis identified the use of a femoral nerve block as the most significant variable correlating with the incidence of post-operative development of VTE, and the odds ratio for VTE development in Group G was 3.12 (95% CI, 0.57-20.56). Conclusions: We suggest the possibility that the addition of a femoral nerve block on general anesthesia may reduce the incidence of the development of VTE following TKA.
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박희철,Shinichi Shimizu,Akio Yonesaka,Kazuhiko Tsuchiya,Yasuhiko Ebina,Hiroshi Taguchi,Norio Katoh,Rumiko Kinoshita,Masayori Ishikawa,Noriaki Sakuragi,Hiroki Shirato 연세대학교의과대학 2010 Yonsei medical journal Vol.51 No.1
Purpose: The purpose of this study is to evaluate the clinical results of treatment with a high dose of 3-dimensional conformal boost (3DCB) using a real-time tracking radiation therapy (RTRT) system in cervical cancer patients. Materials and Methods: Between January 2001 and December 2004, 10 patients with cervical cancer were treated with a high dose 3DCB using RTRT system. Nine patients received whole pelvis radiation therapy (RT) with a median dose of 50 Gy (range, 40-50 Gy) before the 3DCB. The median dose of the 3DCB was 30 Gy (range, 25-30 Gy). Eight patients received the 3DCB twice a week with a daily fraction of 5 Gy. The determined endpoints were tumor response, overall survival, local failure free survival, and distant metastasis free survival. The duration of survival was calculated from the time of the start of radiotherapy. Results: All patients were alive at the time of analysis and the median follow-up was 17.6 months (range, 4.9-27.3 months). Complete response was achieved in nine patients and one patient had a partial response. The 1- and 2-year local failure free survival was 78.8% and 54%, respectively. The 1- and 2-year distant metastasis free survival was 90% and 72%, respectively. Late toxicity of a grade 2 rectal hemorrhage was seen in one patient. A subcutaneous abscess was encountered in one patient. Conclusion: The use of the high dose 3DCB in the treatment of cervical cancer is safe and feasible where intracavitary brachytherapy (ICBT)is unable to be performed. The escalation of the 3DCB dose is currently under evaluation.
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1MHz Variable Sampling Deadbeat Control for PM motor using FPGA
Asahi Kitada,Kota Miyata,Kota Tsuchiya,Hiroki Sato,Tomoki Yokoyama 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
A new digital control method for permanent magnet synchronous motor based on deadbeat control using FPGA based hardware controller is proposed. Using the discrete time model of PMSM, the deadbeat control law is derived using a model inverse solution. The superior calculation capability of FPGA realize the ideal digital control feedback system without any sampling compensation method. The verification of the proposed method were carried out through simulations and experiments.
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