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유한요소법을 이용한 인두의 기능이상에 대한 생체역학적 모델
김성재,배하석,최병철,김성민,Kim Sung Jae,Bae Ha Suk,Choi Byeong Cheol,Kim Sung Min 대한의용생체공학회 2003 의공학회지 Vol.24 No.6
인두는 구강과 식도, 비강과 폐의 중간에서 능동적으로 구강을 통해 섭취되는 음식물과 비강을 통해 흡입되는 공기의 통로역할을 하는 주요한 기관이다. 본 연구는 유한요소기법을 이용한 인두의 3차원 구조의 재구성 과정을 거쳐 인두의 생체역학모델을 구현하였으며, 연하곤란환자의 인두근육의 주요부분에 대한 구조적 변형특성을 3가지로 분류하여 유한요소기법을 이용하여 인두내의 압력에 대한 형상의 변형을 관찰 후 최적화 과정을 거쳐 각 부분에서의 추정 압력 구배를 측정하여 연하과정에서 내부에 생성되는 압력의 연속적인 압력분포를 추정하였다. CT에 의한 인두의 변형 형상을 추정하여 임의 압력에 의한 인두구조의 변형 형상을 유한요소 해석에 의해 계산한 후 비교하여 실제 인두강 내에 형성되는 압력을 추정하였다. 재료적 특성은 인두의 기능이상 시 근조직경화가 발생, 즉 stiffness 가 증가하는 것으로 가정하여 응력-변형률 관계에 있어서 각각 $25\%,\;50\%,\;75\%$씩 증가시켜 분석하였다. 이러한 인두의 생체역학모델은 인두기능장애를 가진 환자의 치료 계획 수립에 도움이 되는 유용한 자료를 제공 할 것으로 생각된다. Pharynx is a system transporting foods by peristaltic motion(contraction and expansion movement! into the esophagus and functioning as airway passages. In this study, structural changes of pharyngeal dysfunction are analyzed by biomechanical model using CT and FEM(finite clement method). Loading condition was assumed that equal pressure was loaded sequentially to inside of pharyngeal tissue. In order to analyze the pharyngeal muscular dysfunction by biomechanical model. the pharyngeal dysfunctions was classified into 3 cases. Taking into account the clinical complication by neuromuscular symptoms such as pharyngeal dysfunction after stroke. we assumed that a change of material property is caused by muscular tissue stiffness. A deformation of cross sectional area of the pharynx is analyzed increasing the stiffness $25\%,\;50\%,\;75\%$ in each case on the basis of stress-strain relationship. Based on three-dimensional reconstruction of pharyngeal structure using limited factor - techniques and the optimization procedure by means of inverse dynamic approach. the biomechanical model of the human pharynx is implemented. The results may be used as clinical index illustrating the degree of pharyngeal muscular dysfunction. This study may be used as useful diagnostic model in discovering early deglutitory impediment caused by physiological or pathological pharyngeal dysfunction.
송창호,배하석,이승원,Song, Chang-Ho,Bae, Ha-Suk,Lee, Seung-Won 대한물리치료학회 2006 대한물리치료학회지 Vol.18 No.2
Purpose: The purpose of this study was to evaluate the effects of dry-hydrotherapy to release pain in patient with low back pain. Methods: The subjects of the study were fifty patient with low back pain in orthopedic clinic. Fifty patients who had low back pain were randomly divided into 2 groups, 1) dry-hydrotherapy group 2) control group. Visual analog scale(VAS) and Oswestry low back pain disability questionnaire were measured before and after treatment. The treatment plan Was as follows; 15 min. exercise per day and 5 days per week for 2 weeks. Results: 1. Before dry-hydrotherapy, there was no significant difference in VAS score and Oswestry low back pain disability questionnaire score between two groups. 2. The VAS score was significantly decreased in both groups after 2-week dry-hydrotherapy and the decrease in the AS score in dry-hydrotherapy group was significantly lower than in control group. 3. The Oswestry low back pain disability questionnaire score was significantly decreased in both groups after 2-week dry-hydrotherapy and the decrease in Oswestry low back pain disability questionnaire score dry-hydrotherapy group was significantly lower than in control group. Conclusion: In conclusion, the dry-hydrotherapy was effective to alleviate pain in patients with low back pain.
최귀윤(Gui Yun Choi),이혜경(Hye Kyung Lee),정덕유(Duk Yoo Jung),배하석(Ha Suk Bae),양서연(Seo Yon Yang),최종녀(Jong Nyeo Choi) 한국간호연구학회 2023 한국간호연구학회지 Vol.7 No.2
Purpose : This study was conducted to investigate the functions of daily living, physical and cognitive functions, and functional recovery training services of elderly residents in long-term care facilities. Method : We sent surveys to representatives of the facilities and analyzed the data for 73 care facilities that we received via email. Each facility has selected one resident for each of the eight groups. The functions of daily living, cognitive function and physical function, and functional recovery training service providers of 453 selected residents were recorded on a checklist based on the past week. Results : The degree of assistance for activities such as bathing and shampoo increased proportionally from Group 1 to 8 in the eight categorized groups. The proportion of cognitive and physical impairments also increased. The analysis of the average time and frequency of functional recovery training conducted by residents in Group 1 to 8 over a one-week period revealed that the average time of physical activity training was 9.56 minutes with 3.34 sessions, movement and walking training had an average of 6 minutes with 4 sessions, and activities of daily life training had an average of 12.04 minutes with 4 sessions. Conclusion : The average time and frequency of functional recovery training conducted for the residents can be utilized for the development of standardized guidelines for functional recovery training. There is a need for activity-centered functional recovery training in conjunction with the daily activities of the residents.
金性民(Sung-Min Kim),李柱煥(Joo-Hwan Lee),崔炳哲(Byeong-Cheol Choi),鄭會昇(Whoi-Seong Jung),裵夏奭(Ha-Suk Bae) 대한전기학회 2008 전기학회논문지 Vol.57 No.12
Recently, ultrasound is becoming a universal way of treatment when it comes to clinic. The thermal effect of therapeutic ultrasound can raise the temperature of tissue without damage and thus increases the flow rate, and this leads to the oxygen transportation velocity of peripheral tissue and ultimately facilitates the metabolism. The purpose of this research is analyzing relations between PTT and transmission time of therapeutic ultrasound, and in this study the PTT variation due to respective transmission time of ultrasound upon 17 normal persons was measured and as a result, it was observed that PTT increases as transmission time of therapeutic ultrasound.
인천 장애인 아시안게임에 참가한 대한민국 국가대표선수들의 도핑의식에 대한 태도 및 성향
안영환 ( Young-hwan An ),이근호 ( Geun-ho Lee ),김영식 ( Young-sik Kim ),김길태 ( Kil-tae Kim ),이주영 ( Joo-young Lee ),백남희 ( Nam-hee Baek ),최일석 ( Il-suk Choi ),김상훈 ( Sang-hoon Kim ),배하석 ( Ha-suk Bae ) 대한스포츠의학회 2015 대한스포츠의학회지 Vol.33 No.2
The purpose of this study was to investigate the tendencies and awareness of the doping of the Korea national disabled athletes who participated in Incheon 2014 Asian Para Games. The subjects were composed of Korea national athletes (211 person, male 141 person, female 70 person) participated in 16 sports in Incheon 2014 Asian Para Games. Firstly, the data were collected by questionnaires measure including doping knowledge, behavior and attitude (performance enhancement attitude scale, PEAS) and analyzed using SPSS ver. 18.0 for window. The results indicate that female athletes tend to be more generous than men tendencies to for doping (p=0.027). Especially the aged groups showed significant differences in over fifty athletes (p=0.016). The PEAS score according to the sports type showed a generous doping tendency in speed/power type (p=0.01). Furthermore 43% of athletes acquire knowledge of the doping from Sports Association, directors, coaches, while Korea Anti-Doping Agency was lower by 23%. In conclusion, We need to provide education and information to improve awareness of doping for the national team players and coaches.