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Kawasaki, Koji(카와사키 코지),Suzuki, Kazuki(스즈키 카즈키),Lee, Kwang-Ho(이광호),Kim, Do-Sam(김도삼) 한국해안해양공학회 2013 한국해안해양공학회 논문집 Vol.25 No.6
2011년 일본동북지방 대지진 이후, 규모 9.0의 토카이, 토난카이 및 난카이 대규모 지진이 일본 서부의 태평양 해안을 내습할 수 있다는 주장이 제기되고 있다. 본 연구에서는 태평양 해안과 일본의 주요 3대 만인 도쿄만과 이세만 그리고 오사카만에서 규모 9.0의 토카이, 토난카이 및 난카이 대규모 지진에 의해 발생하는 지진해일의 전파 특성을 수치적으로 검토하였다. 본 연구에서 수행된 수치해석결과 M9.0의 지진에 의해 발생하는 태평양 해안에서의 지진해일 높이는 M8.7의 지진에 비해 그 크기가 약 2배에 달하며 지진원으로부터 떨어진 일부 지역에서는 빠른 지진해일의 도달시간을 확인하였다. 또한, 페쇄된 만의 영향에 의해 오랜 시간 동안 만내에서 고수위가 지속됨을 알 수 있었다. After the 2011 Tohoku Earthquake, it has been pointed out that Tokai, Tonankai and Nankai massive earthquakes with a magnitude of 9.0 could strike the Pacific coasts in western Japan. This study aims at investigating numerically propagation characteristics of tsunami generated by a 9.0 magnitude Tokai, Tonankai and Nankai massive earthquakes on the Pacific coasts and three major bays in Japan, Tokyo Bay, Ise Bay and Osaka Bay. It was revealed from the numerical results that the tsunami heights on the Pacific coasts for M9.0 earthquake were about twice as much as those for M8.7 earthquake and the first tsunami arrival time was faster at some areas distant from the tsunami source. Moreover, high water level in the bays was recognized to continue for a long time because of the enclosed bays.
Yasuhiro Kaiho,Shinichi Yamashita,Akihiro Ito,Yoshihide Kawasaki,Hideaki Izumi,Naoki Kawamorita,Hisanobu Adachi,Koji Mitsuzuka,Yoichi Arai 대한비뇨의학회 2016 Investigative and Clinical Urology Vol.57 No.5
Purpose: To evaluate the effects of phosphodiesterase type 5 inhibitor (PDE5i) on urinary continence recovery after bilateral nerve-sparing radical prostatectomy (BNSRP). Materials and Methods: Between 2002 and 2012, 137 of 154 consecutive patients who underwent BNSRP in our institution retrospectively divided into 3 groups that included patients taking PDE5i immediately after surgery (immediate PDE5i group, n=41), patients starting PDE5i at an outpatient clinic after discharge (PDE5i group, n=56), and patients taking no medication (non-PDE5i group, n=40). Using self-administered questionnaires, the proportion of patients who did not require incontinence pads (pad-free patients) was calculated preoperatively and at 1, 3, 6, 12, 18, and 24 months after BNSRP. Severity of incontinence was determined based on the pad numbers and then compared among the 3 groups. Results: Proportions of pad-free patients and severity of incontinence initially deteriorated in all of the groups to the lowest values soon after undergoing BNSRP, with gradual improvement noted thereafter. The deterioration was most prominent in the immediate PDE5i group. As compared to the non-PDE5i group, both the PDE5i and immediate PDE5i groups exhibited a better final continence status. Conclusions: PDE5i improves final continence status. However, administration of PDE5i immediately after surgery causes a distinct temporary deterioration in urinary incontinence.
Shuichi Shimada,Hideo Saito,Yoshihide Kawasaki,Shinichi Yamashita,Hisanobu Adachi,Narihiko Kakoi,Takashige Namima,Masahiko Sato,Atsushi Kyan,Koji Mitsuzuka,Akihiro Ito,Takuhiro Yamaguchi,Yoichi Arai 대한비뇨의학회 2017 Investigative and Clinical Urology Vol.58 No.4
Purpose: To evaluate renal function 1 year after radical nephrectomy (RN) for renal cell carcinoma, the preoperative predictors of postnephrectomy renal function were investigated by sex, and equations to predict the estimated glomerular filtration rate (eGFR) 1 year after RN were developed. Materials and Methods: A total of 525 patients who underwent RN between May 2007 and August 2011 at Tohoku University Hospital and its affiliated hospitals were prospectively evaluated. Overall, 422 patients were analyzed in this study. Results: Independent preoperative factors associated with postnephrectomy renal function were different in males and females. Preoperative eGFR, age, tumor size, and body mass index (BMI) were independent factors in males, while tumor size and BMI were not independent factors in females. The equations developed to predict eGFR 1 year after RN were: Predicted eGFR in males (mL/min/1.73 m2)=27.99−(0.196×age)+(0.497×eGFR)+(0.744×tumor size)−(0.339×BMI); and predicted eGFR in females=44.57−(0.275×age)+(0.298×eGFR). The equations were validated in the validation dataset (R2=0.63, p<0.0001 and R2=0.31, p<0.0001, respectively). Conclusions: The developed equations by sex enable better prediction of eGFR 1 year after RN. The equations will be useful for preoperative patient counseling and selection of the type of surgical procedure in elective partial or RN cases.