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골밀도를 고려한 척추경 나사못의 최적 디자인 도출을 위한 실험적 연구
송찬희(Chan-Hee Song),고태식(Tae Sik Goh),이정섭(Jung Sub Lee),이은선(Eun Sun Lee),허진영(Jin-Young Heo),김윤진(Yoon-Jin Kim),이치승(Chi-Seung Lee) 대한기계학회 2020 大韓機械學會論文集B Vol.44 No.8
본 논문에서는 퇴행성 및 특발성 척추 질환 치료에 사용되는 척추경 나사못의 최적 디자인을 제안하였다. 최적 디자인 도출을 위하여 서로 다른 골밀도의 인공 해면골과 다양한 척추경 나사못의 디자인에 대한 인발 시험을 수행하여 인발력(고정력)을 검토하였다. 우선, 총 9종의 일반형 나사못의 인발시험을 통하여 최적의 디자인을 도출하였으며, 여기에서 도출된 최적 일반형 나사못 디자인을 기반으로 이중 나사산형, 침투형, 복합형 척추경 나사못의 디자인을 설계 및 시제품을 제작하였다. 제작된 시제품과 글로벌 기업의 제품에 대한 인발 시험 수행 및 비교를 통하여 본 시제품의 우수성을 검증하였고, 골밀도에 따른 이중 나사산-피질골, 골 시멘트-해면골의 고정력에 미치는 영향에 대하여 검토하였다. 본 연구를 통하여 이중 나사산과 골 시멘트가 고정력에 지대한 영향을 미치며, 골다공증성골에서는 더욱 큰 효과를 보임을 알 수 있었다. 이를 통하여 골밀도를 고려한 최적의 척추경 나사못 디자인을 도출할 수 있었다. This paper proposes an optimal pedicle screw design for the treatment of spinal diseases. A pullout test was performed with various pedicle screw designs and artificial bones with different bone mineral densities, in consideration of the pullout force of the pedicle screw. First, the optimal design of the standard pedicle screw (S) was selected through a pullout test of the 9 types of standard pedicle screw, based on which the prototypes of the doublethread (D), penetration (P), and hybrid (H) pedicle screws were designed and produced. The D, P, and H pedicle screws were also subjected to pullout tests and compared with the products of a global medical device company. The effects of the double thread-cortical bone and bone cement-cancellous bone were investigated according to bone mineral density. The double thread and bone cement had significant effects on the fixation force to the osteoporotic bone. The optimal pedicle screw design was derived in consideration of bone mineral density in this study.
피로와 우울.불안증 환자에서 Fatigue Severity Scale의 임상적 유용성
정규인,송찬희,Chung, Koo-In,Song, Chan-Hee 한국정신신체의학회 2001 정신신체의학 Vol.9 No.2
Objectives : Fatigue is a common symptom in primary medical care and has nonspecific and highly subjective features. So it has been difficult to define and measure fatigue, especially those present without any organic diseases. This study was conducted to evaluate the validity of the Fatigue severity scale(FSS) in patients with persistent fatigue who were free of any organic diseases or psychiatric disorders of depression or anxiety. Methods : Subjects consisted of 45 controls, 44 fatigued patients and 43 psychiatric patients with depression or anxiety. They all completed the fatigue severity, modified Bepsi stress, and Hospital anxiety and depression scales. Chalder fatigue scale was administrated randomly in 30 of them. Data were analyzed for reliability and validity of the FSS. Results: Cronbach's a coeffient of FSS was 0.929, and the Pearson correlation coefficient for test-retest was 0.916(p<0.01). ANCOVA for discriminant validity revealed that there were significant differences in mean FSS values among the three groups. The fatigue group had significantly higher FSS value than the other two groups. The psychiatric group also had significantly higher FSS value than the control group. The Pearson correlation coefficient for convergent validity by comparing FSS with Chalder fatigue scale was 0.782(p<0.01). Using FSS index 3.22 as the cut-off point, sensitivity was 84.1% and specificity was 85.7% for the fatigue and control groups, respectively. Conclusion : Results suggested the clinical application of the FSS to be a useful measurement for distinguishing fatigue between patients with physiologic fatigue and psychiatric patients with depression or anxiety.
유전자 알고리즘을 이용한 무인잠수정의 와조류장에서의 전역경로계획
이기영,김수범,송찬희,Lee, Ki-Young,Kim, Subum,Song, Chan-Hee 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.4
The purpose of this paper is to demonstrate that the genetic algorithm can be useful for the global path planning when the obstacles and current field data are given. In particular, the possibilities for a novel type small AUV mission deployment in tidal regions, which experience vortical currents, were examined. Experimental simulations show feasibility and effective in generate the global path regardless of current and obstacles. By choosing an appropriate path in space, an AUV may both bypass adverse currents which are too fast to be overcome by the vehicle's motor and also exploit favorable currents to achieve far greater speeds than motors could otherwise provide, while substantially saving energy.
암 환자의 통증 외 증상의 빈도 및 고통 지수 조사 - "표준형 성인 암성 통증평가 도구"개발을 위해 -
이명아,최윤선,장세권,박진노,송찬희,윤소영,이지원,염창환,Lee, Myung-Ah,Choi, Youn-Seon,Jang, Se-Kwon,Park, Jean-No,Song, Chan-Hee,Yoon, So-Young,Lee, Ji-Won,Yeom, Chang-Hwan 한국호스피스완화의료학회 2003 한국호스피스.완화의료학회지 Vol.6 No.1
Purpose : This study was conducted to develop primary assessment tools to evaluate the relationship between symptom prevalence and symptom distress in cancer patients of Korea. Methods : A total of 196 patients diagnosed with cancer admitted in 5 general hospitals from January, 6 to January, 20 in 2003, were entered into the study. These patients were asked to complete the MSAS (Memorial symptom assessment scale). We classified these answers into prevalence and distress and then scored them according to grade and frequency. Results : The five most prevalent symptoms were lack of energy (82.1%), dry mouth (73.5%), pain (73.5%), itching (72.4%), and feeling drowsy (68.9%). Among 24 common prevalent symptoms, the ten most distress the symptoms were dry mouth (2.11), itching (2.07), pain (2.03), lack of energy (1.98), difficulty sleeping (1.96), worrying (1.94), "I don't look like myself" (1.91), constipation (1.88), and difficulty concentration (1.76). Conclusion : These 10 symptoms had high prevalence and distress in cancer patients of Korea. We suggest these symptoms to be applied in developing the primary assessment tool in cancer patients.
표준형 성인 암성 통증평가 도구 개발을 위한 암성 통증 어휘조사
장세권,박진노,염창환,이명아,송찬희,윤소영,이영희,최윤선,Jang, Se-Kwon,Park, Jean-No,Yeom, Chang-Hwan,Lee, Myung-Aha,Song, Chan-Hee,Yoon, So-Young,Lee, Young-Hee,Choi, Youn-Seon 한국호스피스완화의료학회 2003 한국호스피스.완화의료학회지 Vol.6 No.1
This paper addresses the minor differences in the description of pain in Korean language in order to develop a standarized cancer pain aneument tool for Korean adults, Korean Caancer Pain Assessement Tool. The subtle differences in the meaning of expressions used cannot be translated into English and therefore we omiltted the English abstract.
"표준형 성인 암성 통증 평가도구" 개발을 위한 시각통증등급의 최고통증강도 어휘 및 심리.사회적 평가 항목의 선정 - 델파이 방법을 이용 -
김진서,천병철,최윤선,송찬희,염창환,이명아,이준영,윤소영,장세권,이영희,이경욱,이철,박진노,Kim, Jin-Seo,Chun, Byung-Chul,Choi, Youn-Seon,Song, Chan-Hee,Yeom, Chang-Hwan,Lee, Myung-Aha,Lee, June-Young,Yoon, So-Young,Jang, Se-Kwon,Lee, Young- 한국호스피스완화의료학회 2003 한국호스피스.완화의료학회지 Vol.6 No.1
This paper addresses the minor differences in the description of pain in Korean language in order to develop a standarized cancer pain aneument tool for Korean adults, Korean Cancer Pain Assessement Tool. The subtle differences in the meaning of expressions used cannot be translated into English and therefore we omiltted the English abstract.
혈관내 풍선 확장에 의한 대동맥 차단소생술이 적용된 돼지 복부 장기 조직의 기계적 거동 평가
왕일재,유지훈,허업,송승환,안효영,송찬희,이치승,유동만,Wang, Il Jae,You, Ji-Hun,Huh, Up,Song, Seunghwan,Ahn, Hyo Young,Song, Chan-Hee,Lee, Chi-Seung,Ryu, Dong-Man 한국재료학회 2020 한국재료학회지 Vol.30 No.4
Abdominal organs are the most vulnerable body parts under vehicle trauma, and there is high mortality from acute injuries in accidents. There are various ways to reduce this high mortality; one method is Resuscitative Endovascular Balloon Occlusion of the Aorta, which has recently become very popular as a minimally invasive alternative in the emergent management of patients with non-compressible hemorrhages below the diaphragm. However, high safety factor for patients is applied in actual clinical practice because there is no exact standard for the operating time. Therefore, in this study, the effects of the mechanical behavior of organ tissues for the duodenum, kidney, and liver on the operating time of Resuscitative Endovascular Balloon Occlusion of the Aorta is investigated in order to obtain data needed to establish standards of operating time. In characteristic analysis of organ tissues, uniaxial tensile test and compression test are conducted according to the operating time.