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요천추부 염좌로 진단된 급성 요통 환자의 방사선학적 소견과 치료기간에 대한 임상적 고찰 - X-ray와 CT 소견 분석 -
고필성,이원일,조병진,권신애,이정우,김민정,서병관,우현수,김재규,박동석,백용현 대한침구의학회 2010 대한침구의학회지 Vol.27 No.4
Objectives : To demonstrate the need for differential diagnosis between discogenic pain and lumbar sprain and strain in acute low-back pain patients. Methods : Outpatients who made their first visits during May 1, 2009 to Oct. 30, 2009(n=53) were examined by history taking, physical examination, X-rays, and CT imaging. Disorders found on lumbosacral spine X-ray cuts and those on lumbosacral spine CT images were separately recorded. The relationship between treatment period, disc space narrowing and disc degeneration on X-rays, and HIVD on CT images was examined. Results : 1. Correlation between disc space narrowing on X-rays and HIVD found on CT images was analyzed. 21(72.41%) out of 29 patients having disc space narrowing on X-rays and HIVD on CT at the same level required treatment for over 8 weeks. 2. 2(50%) out of 4 Lawrence classification grade I patients, 8(66.67%) out of 12 grade II patients, and 14(70%) out of 20 grade III patients needed treatment for over 8 weeks. Conclusions : Disc space narrowing on X-ray and HIVD on CT at the same level, or disc space narrowing and disc degeneration on X-ray image alone indicate a tendency for treatment periods over 8 weeks, which is longer than the conventional treatment period for lumbar strain and sprain.
다양한 종횡비의 직사각바 다단 인발공정에서 치수정도향상을 위한 프로세스 맵
고필성,김정훈,김병민 한국소성∙가공학회 2018 소성가공 : 한국소성가공학회지 Vol.27 No.3
In the rectangular bar multi-stage drawing process, the cross-section dimensional accuracy of the rectangular bar varies depending on the aspect ratio and process conditions. It is very important to predict the dimensional error of the cross-section occurring in the multi-stage drawing process according to the aspect ratio of the rectangular bar and the half die angle of each pass. In this study, a process map for improving the dimensional accuracy according to the aspect ratio was derived in the drawing process of a rectangular bar. FE-simulation of the multi-stage shape drawing process was carried out with four types of rectangular bar. The results of the FE-simulation were trained to the nonlinear relationship between the shape parameters using an Artificial Neural Network (ANN), and the process maps were derived from them. The optimum half die angles were determined from the process maps on the dimensional accuracy. The validity of the suggested process map for aspect ratios 1.25~2:1 were verified through FE-simulation and experimentation.
고필성,조석주 대한응급의학회 2000 대한응급의학회지 Vol.11 No.2
Background: The prehospital care system in the Pusan area is primitive in organization, and the emergency medical system of every hospital needs to be developed. A analysis of patients who were treated in emergency rooms and who died is necessary in order to establish an emergency medical service system which is appropriate for the community. Method: The authors reviewed the records of 117 patients who died in the emergency room of Pusan National University Hospital from January 1998 to December 1998. Results: 1) Among the 117 patients, 68 patients were male (58.1%) and 49 patients were female (41.9%). The incidence of patients over the age of 70 was very high (33 cases, 28.2%). 2) Among the 117 patients, 99 patients died due to disease(84.6%), 16 die to trauma, and 2 due to intoxication. The most prevalent disease was cardiovascular disease. 3) Among the 117 patients, 63 patients arrived voluntarily (53.8); the remainder were transferred from other hospitals. Forty-eight patients were transported by 119 ambulance (41.0%), and 41 patients were transported by hospital ambulance. 4) As for consciousness level, 52 patients(44.4%) were alert upon arrival at the emergency room, but 42 patients (35.9%) were unresponsive. 5) In 53 patients, the intervals between arrival at the emergency room and the onset of cardiac arrest were from 2 to 24 hours (45.3%). 6) Cardiac arrest was most frequent between 10:00 pm and 8:00 am. 7) Cardiopulmonary resuscitation was done in 74 patients (63.2%), and the mean duration was from 30 minutes to 1 hour. 8) Sixty-sex patients were patients of internal medicine, and their mean stay time was 17 hours 27 minutes. Conclusion: These results suggest that systematic education in advanced cardiopulmonary resusciatation, expansion of emergency physicians, an increase in the number of intensive care units are required.