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요통 및 좌골신경통 환자의 치료결과 : 수면장애 및 피로감과 자각적 통증 및 장애정도의 관계
이경석,윤석만,도재원,배학근,윤일규,Lee, Kyeong-Seok,Yoon, Seok-Mann,Doh, Jae-Won,Bae, Hack-Gun 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.3
Objective : Psychological factors may have a major influence on the outcome of treatment for back pain. We investigated the relationship between the outcome and some psychological factors, such as self-reported pain intensity, disability, sleep disturbance and fatigue. Method : The study was conducted as a survey using a questionnaire and telephone interviews. The survey included consecutive 294 patients who visited the neurosurgical out-patient department complaining of low back pain and contacted by telephone on average seven months after the first visit. Pain intensity was measured by visual analog scale, and disability was assessed by Waddell's chronic disability index. Results : The outcome of treatment for back pain was recovered in 36.7%, improved in 30.6%, almost same in 28.6%, and aggravated in 4.1%. Overall rate of improvement was 67.3%. The rate of improvement was related to the duration, patterns and intensity of the symptom, and Waddell index. It was not influenced by the doctors, special studies, and methods of treatment. When the duration was more than 6 months, there were the symptoms of both back and legs, and the self-reported Waddell index was 1-3, the rate of improvement was relatively low. Although the intensity of the pain and disability was closely related to the degree of sleep disturbance, fatigue, appetite, or indigestion, the outcome of treatment for back pain was not always bad in patients with high psychological stress. Actually the outcome of the patients who complained severe pain and disability was better than the outcome of the others. Conclusion : The outcome of the back pain can be predicted by the duration, patterns and intensity of the symptom, and Waddell index. The multidisciplinary treatment will be necessary for the patients whose expected outcome is not good to reduce not only the physical symptoms but also the psychological stress.
이경석,도재원,윤석만,배학근,윤일규,Lee, Kyeong-Seok,Doh, Jae-Won,Yoon, Seok-Mann,Bae, Hack-Gun,Yun, Il-Gyu 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.7
Objective : Traumatic disc lesion is a lesion with tremendous controversies. The causal relationships of this lesion are not established along with pathogenesis, diagnostic criteria, methods of treatment and the outcome. However, a significant number of patients with back pain after a trauma underwent spinal operations under the diagnosis of traumatic disc lesions. Such an ill-directed operation eventually produce a person with an iatrogenic disability. We present two illustrative cases, and tried to make a preventive method. Methods : We examined the path from mild trauma after a road traffic accident into the iatrogenic disability in two illustrative cases, who requested disability assessment and medical appraisement. We evaluated the reason and background for such an unwanted outcome and tried to find a method to reduce or prevent it by a literature review. Results : These two patients were admitted to the hospital with the diagnosis of lumbar sprain after a road traffic accidents. They eventually underwent spinal surgery under another diagnosis such as traumatic disc herniation or internal disc disruption. They stayed at the hospital for more than six months and finally lost their jobs. They became the disabled at last. Although they complained back pain, they never insisted by themselves that their symptoms were due to the traumatic disc lesion. To prevent such an iatrogenic disability, the doctors should assist them to go-back to the workplace promptly instead of a reckless extension of the treatment period. It may be necessary to evaluate the certificates to extend the treatment period with an additional diagnosis by a medical expert. To reduce the unnecessary long-term admission, a new billing system such as a partial share for the high cost of the treatment by the patients may be needed. Conclusion : It is not the patient but the doctors, who has the responsibility to avoid the unnecessary operations. All treating doctors should try to reduce or prevent such an iatrogenic complication caused by ourselves before we are forced to do so.
대한신경외과학회지에 발표된 요통 환자의 치료결과 평가방법
이경석,도재원,윤석만,배학근,윤일규,Lee, Kyeong-Seok,Doh, Jae-Won,Yoon, Seok-Man,Bae, Hack-Gun,Yun, Il-Gyu 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.5
Objectives : Criteria for evaluating the results of treating low back pain vary widely. We examined the methods measuring the outcome in the papers of Journal of Korean Neurosurgical Society. Methods : We selected all published articles describing the methods measuring the outcome of low back pain in the journal. They were classified into 3 periods such as period 1 for volume 1-20, 2 for volume 21-25, and 3 for volume 26-28. Results : There are 25 articles in period 1, 44 in period 2, and 30 in period 3. The outcome was classified into 0 to 5 classes by more than 15 different methods. Although the terms and descriptive criteria differ, 4 classes were the most common classification, being 16 in period 1, 39 in period 2, and 19 in period 3. The outcome was usually measured by authors' own method in period 1. In period 2, criteria by Gill et al was most commonly used along with many different criteria. Criteria by Prolo et al became a common method in period 3. Conclusion : Varying methods compromised comparative analyses of outcome. A more simple and universally applicable criteria is necessary to facilitate comparisons among various methods of treatment.
임의 위치 구조물의 손상예측을 위한 인공지능 기반 지진가속도 추정방법
이경석,서영득,백은림,Kyeong-Seok Lee,Young-Deuk Seo,Eun-Rim Baek 한국구조물진단유지관리공학회 2023 한국구조물진단유지관리공학회 논문집 Vol.27 No.3
It is not efficient to install a maintenance system that measures seismic acceleration and displacement on all bridges and buildings to evaluate the safety of structures after an earthquake occurs. In order to maintain this, an on-site investigation is conducted. Therefore, it takes a lot of time when the scope of the investigation is wide. As a result, secondary damage may occur, so it is necessary to predict the safety of individual structures quickly. The method of estimating earthquake damage of a structure includes a finite element analysis method using approved seismic information and a structural analysis model. Therefore, it is necessary to predict the seismic information generated at arbitrary location in order to quickly determine structure damage. In this study, methods to predict the ground response spectrum and acceleration time history at arbitrary location using linear estimation methods, and artificial neural network learning methods based on seismic observation data were proposed and their applicability was evaluated. In the case of the linear estimation method, the error was small when the locations of nearby observatories were gathered, but the error increased significantly when it was spread. In the case of the artificial neural network learning method, it could be estimated with a lower level of error under the same conditions.
인공지능 기반 면진장치 변위 측정 센서의 오차 저감 알고리즘 개발
이경석 ( Lee Kyeong-seok ),서영득 ( Seo Young-deuk ),전언찬 ( Jeon Eon-chan ),정득영 ( Jung Duk-young ),정영수 ( Jeong Young-soo ) 한국구조물진단유지관리공학회 2023 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.27 No.1
첨단정보통신기술의 고도화에 따라 확충되고 있는 데이터설비 등에 대한 내진설계에 관심이 증대되고 있다. 전자정보통신 설비를 지진으로부터 보호하기 위해 소형 면진장치가 개발되고 있다. 하지만 설계초과 지진이 발생할 경우 면진 탑재물이 한계이상으로 변위를 일으켜 전도되는 문제가 발생하였다. 따라서 신속한 대응과 유지관리를 위해 면진장치를 모니터링 할 필요가 요구되고 있다. 기존의 면진장치 변위 측정 기술인 기계식 장치와 각도센서를 이용한 간접 측정 방법은 장치의 설계 공차로 인한 각도 측정 오차를 유발하고 정확한 변위를 측정하기에 한계가 있다. 본 연구에서는 면진장치에서 측정된 시간 이력을 분석하는 인공지능 기반의 모델을 구축하여 변위 측정 오차를 저감하는 알고리즘을 개발하고 유효성을 검증하였다.
면진장치 운동이력 추적 알고리즘 및 모니터링 시스템 개발
이경석 ( Lee Kyeong-seok ),서영득 ( Seo Young-deuk ),정영수 ( Jeong Young-soo ),최형석 ( Choi Hyoung-suk ) 한국구조물진단유지관리공학회 2020 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.24 No.1
최근 국내외적으로 지진 발생 규모가 증대하고 있으며, 우리나라를 비롯한 많은 나라에서 전기통신설비에 대한 내진설계에 관심이 중대되고 있다. 이에 따른 소형 면진 대상체가 지진시 한계이상의 변위로 전도되는 문제가 발생하여 장비손상의 1차 피해뿐만 아니라 주요 데이터 손실 및 전산 시스템 마비로 2차 피해가 발생한기도 한다. 따라서 면진 대상체의 기능 연속성 확보 및 긴급 대처를 위한 실시간 운동이력 계측 모니터링 시스템이 필요하다.
이경석 ( Lee Kyeong-seok ),서영득 ( Seo Young-deuk ),최형석 ( Choi Hyoung-suk ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1
지진이 발생하면 시설물의 관리자는 구조물의 피해발생 여부를 조사하고 긴급복구를 실시하는 등 대응을 수행할 책임이 있다. 그러나 교량 및 건축물과 같은 대형의 사회기반시설에 대해서 지진발생 후 소수의 관리인원이 제한된 시간 내에 다수구조물의 지진피해를 확인하고 안전성을 평가하는데는 어려움이 있다. 국내에서는 지진재해대응시스템이 개발되어 있으나 확률론적 안전성 평가방법을 적용하고 있어 개별 시설물에 대한 피해 정도를 제공하지는 못하는 실정이다. 이에 본 연구에서는 중, 소형시설물의 지진피해평가·관리시스템을 개발함으로써 지진재해 발생 후 관리자에게 구조물의 피해발생 여부, 긴급점검 등 유지관리활동의 필요유무 정보를 제공하고자 한다.
이경석 ( Lee Kyeong-seok ),서영득 ( Seo Young-deuk ),최형석 ( Choi Hyoung-suk ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.1
지진이 발생하면 시설물의 관리자는 구조물의 피해발생 여부를 조사하고 긴급복구를 실시하는 등 대응을 수행할 책임이 있다. 그러나 교량 및 건축물과 같은 대형의 사회기반시설에 대해서 지진발생 후 소수의 관리인원이 제한된 시간 내에 다수구조물의 지진피해를 확인하고 안전성을 평가하는데는 어려움이 있다. 국내에서는 지진재해대응시스템이 개발되어 있으나 확률론적 안전성 평가방법을 적용하고 있어 개별 시설물에 대한 피해 정도를 제공하지는 못하는 실정이다. 이에 본 연구에서는 중, 소형시설물의 지진피해평가·관리시스템을 개발함으로써 지진재해 발생 후 관리자에게 구조물의 피해발생 여부, 긴급점검 등 유지관리활동의 필요유무 정보를 제공하고자 한다.