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편마비 환자의 어깨관절 통증에서 근육 내 저주파 전기자극치료의 효과
성상윤,서경묵,강시현,박헌종,김돈규 대한재활의학회 2008 Annals of Rehabilitation Medicine Vol.32 No.5
Objective: To investigate the effects of intramuscular low frequency electrical stimulation on shoulder pain in hemiplegic patients.Method: Twenty five hemiplegic shoulder pain patients were divided into two groups. For experimental group, we inserted stainless steel acupuncture needle on the motor points of supraspinatus, infraspinatus, trapezius and middle deltoid muscle and applied intramuscular electric stimulation (4 Hz, unsymmetric spike pulse, 2.0 ms of pulse width) for twenty minutes, three sessions a week, in total 10 sessions. For control group, we applied transcutaneous electrical nerve stimulation for twenty minutes. Visual analog scale(VAS), passive range of motion of shoulder joint, and Korean version of modified Barthel index (K-MBI) were measured before and after the treatment.Results: The VAS of experimental group significantly decreased from 7.23±0.83 to 3.04±1.52, while control group showed a slight decrease from 7.50±0.70 to 5.64±0.74. The experimental group showed significant improvement compared to the control group (p<0.05). In the experimental group, there were significant improvements in motion of abduction from 103.6±20.5 to 134.0±32.3 and external rotation from 60.0±19.6 to 68.6±19.7 (p<0.05) even though there were no significant differences between the two groups.Conclusion: Intramuscular low frequency electrical stimulation improved pain as well as the range of motion. This could be used for the treatment of hemiplegic shoulder pain
성상윤 외 중앙대학교 의과대학 의학연구소 2004 中央醫大誌 Vol.29 No.1·2
Epidemiological studies suggests an increasing incidence of male infertility. Our understanding of the importance of environmental, genetic and occupational factors on sperm count and fertility is constrained by the extreme variation in sperm count. The relative importance of the various factors and the pathways via which they affect sperm count are discussed. The possible role of other environmental factors commonly supposed to affect sperm count (exposure to pesticides or endocrine disruptors) is discussed, although the evidence for a major influence of such factors is lacking. Intracytoplasmic sperm injection (ICSI) has revolutionized the treatment of male infertility. But futher research into the causes and specific treatment of idiopathic male factor infertility is needed.
Simulation을 이용한 A-Frame System 작업자의 이동거리 연구
최현철,성상윤,양난규,정동명,장윤석 대한산업공학회 2015 대한산업공학회 춘계학술대회논문집 Vol.2015 No.4
Order picking process is the most time consuming activity in a warehouse which increases the warehousing cost. To address such inefficiency, a variety of automated systems have been developed. Among them, the A-Frame System is an automated order-picking equipment which is used in a warehouse to handle medical supplies and tobaccos. But in a replenishment area of A-Frame, the workers manually perform the task yet. In this reason, there’s a need for research to increase the utilization of workers. This paper analyzes the replenishment tasks by comparing a moving distance between a single-layer A-frame System and a multi-layer A-frame System. To compare the distance, we conduct simulation study considering operational environment and real world order information acquired at a tobacco warehouse.