• Journal of the Korean Society for Precision Engineering
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• v.29 no.5
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• pp.516-523
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• 2012

Stroke patients should exercise for the rehabilitation of their fingers, because they can't use their hand and fingers. The moving direction of thumb of five fingers is different that of four fingers (force finger, middle finger, ring finger, little finger). The thumb rehabilitation robot for rehabilitation exercise must be included a force control system, because robot can injure thumb by applying too much force. In this paper, the rectangular-type thumb rehabilitation robot was developed for stroke patient's thumb rehabilitation exercise of the flexibility rehabilitation exercise. The characteristic test of the developed rectangular-type thumb rehabilitation robot was carried out with normal men in their twenties. As a result, it is thought that the robot can be used for the flexibility rehabilitation exercise of stroke patient's thumb.

• Journal of Chest Surgery
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• v.28 no.6
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• pp.542-548
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• 1995

The goal of this study is to develop an effective control system for cardiac output regulation based upon the preload and afterload conditions without any transducers and compliance chambers in the moving actuator type total artificial heart. Motor current waveforms during the actuator movement are used as an input to the automatic control algorithm. While the current waveform analysis is performed, the stroke length and velocity of the actuator are gradually increased up to the maximum pump output level. If the diastolic filling rate of either right or left pump begins to exceed the venous return, atrial collapse will occur. Since the diastolic suction acts as a load to the motor, this critical condition can be detected by analyzing the motor current waveforms. Every time this detection criterion is met, the control algorithm decreases the stroke velocity and length of the actuator step by step just below the critical detection level. Then, they start to increase. In this way the maximum pump output under given venous return can be achieved. Additionally the control algorithm provides some degree of afterload sensitivity. If the aortic pressure is detected to exceed 120 mmHg, the stroke length and velocity decrease in the same way as the response to the preload. Left-right pump output balance is maintained by proper adjustment of the asymmetry of the stroke angle. In the mock circulatory test, this control system worked well and there was a considerable range of stroke volume difference with adjustment of the asymmetry value. Two ovine experiments were performed. It was confirmed that the required cardiac output regulation according to the venous return could be achieved with adequate detection of diastolic function, at least in the in vivo short-term survival cases[2-3 days . We conclude that this control algorithm is a promising method to regulate cardiac output in the moving actuator type total artificial heart.

• Journal of Digital Convergence
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• v.11 no.6
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• pp.221-233
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• 2013

This study aims to develop the severity-adjusted length of stay(LOS) model for acute stroke patients using data from the hospital discharge survey and propose management of length of stay(LOS) for acute stroke patients and using for Hospital management. The dataset was taken from 23,134 database of the hospital discharge survey from 2004 to 2009. The severity-adjusted LOS model for the acute stroke patients was developed by data mining analysis. From decision making tree model, the main reasons for LOS of acute stroke patients were acute stroke type. The difference between severity-adjusted LOS from the decision making tree model and real LOS was compared and it was confirmed that insurance type and bed number of hospital, location of hospital were statistically associated with LOS. And to conclude, hospitals should manage the LOS of acute stroke patients applying it into the medical information system.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.7 no.2
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• pp.149-163
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• 2000

The purposes of this study were to investigate the pathway which stroke patients take in seeking medical care and to identify factors which influence that pathway. This study was conducted by a survey. The subjects were 130 adults, who were diagnosed with a stroke between January and April of 2000. Data was collected by means of a interview, questionnaires, and an Activity Index. The result of this study are summarized as follows: 1. The mean age of subject was 61.58 years. Forty-nine percent were men and fifty percent were women. The majority of the subjects were married. For educational level, thirty-three percent finished elementary school, and twenty-three percent, high school. Most of the subjects reported 'middle' economic status. Ninety-two percent lived with their spouse and children. The diagnosis for seventy-two percent was ischemic stroke and for twenty-two percent, hemorrhagic stroke. 2 The most frequent early sign of stroke was hemiplegia(43.3%), loss of consciousness (36.7%), dysarthria(33.3%). The type of hospital first used was a herb hospital(40.8%), or a western hospital(59.2%). The factors in their choice were ; distance from the hospital to the place that the stroke occurred(47.5%), desire for a herb hospital(15.8%), and an invitation(12.9%). The ischemic stroke patients preferred herb hospitals, but hemorrhagic stroke patients preferred a western hospitals. 3. The pattern of stroke patients seeking medical care was that forty-three percent of stroke patients pass through step 1, forty-six percent, through step 2, and 8.5% through step 3. The more steps, the higher the use of herb hospitals. 4. The factors influencing the pathway of stroke patients seeking medical care were diagnosis, and level of consciousness. Ischemic stroke patients used herb hospitals, more frequently hemorrhagic stroke patients, who used western hospitals. The alert patient preferred a herb hospital, but stupor patients preferred a western hospital. 5. The Activity Index was not related to the pathway which stroke patients used in seeking medical care.

• Journal of Advanced Marine Engineering and Technology
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• v.18 no.2
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• pp.104-112
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• 1994

The scavenging efficiency has a great influence on the performance of a diesel engine, especially slow two-stroke diesel engines which are usually used as a marine propulsion power plant. And this is greatly affected by the conditions in the cylinder, scavenging manifold and exhaust manifold during the gas exchange process. There are many factors to affect on the scavenging efficiency and these factors interact each other very complicatedly. Therefore the simulation program of the gas exchange process is very useful to improve and predict the scavenging efficiency, due to the high costs associated with redesign and testing. In this paper, a three-zone scavenging model for two-stroke uniflow engines was developed to link a control-volume-type engine simulation program for performance prediction of long-stroke marine engines. In this model it was attempted to simulate the three different regions perceived to exist inside the cylinder during scavenging, namely the air, mixing and combystion products regions, by modeling each region as a seperate control volume. Finally the scavenging efficiency was compared with three type of scavenging modes, that is, pure displacement, partial mixing and prefect mixing.

• Transactions of the Korean Society of Automotive Engineers
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• v.2 no.5
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• pp.48-57
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• 1994

The specific power output and thermal effeciency of any two-stroke engine are dependent on its scavenging behavior. Among the many factors which influence on the scavenging process, the cylinder head shape is one of the important factor. Hence in this study three different type models of cylinder head shape which are the cylindrical, the spherical and the arbitrary shape are studied to show the effects of the turbulent scavenging process in the cylinder with one inlet port, two side ports and one exhaust port. A modified version of KIVA-II which strip out of or add planes of cells across the mesh above the piston for flow simulation of two-stroke engine is used. The $k-{\varepsilon}$ turbulent model is used. The results show that the flow in a two-stroke engine cylinder of the spherical head shape among the three different type model is a desirable for efficient scavenging.

• The Journal of Korean Medicine
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• v.23 no.4
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• pp.73-90
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• 2002

Objectives: This study investigated significant factors that influence functional evaluation of stroke so as to be a fundamental data for estimating prognosis of stroke patients. Methods: 204 patients were studied within 7 days of admission, after the diagnosis of stroke through brain CT scan, brain MRI scan and clinical observations. They were hospitalized in the oriental medical hospital of Dongeui University from February to July in 2001. They were examined at the early stage of onset, after 2 weeks, 4 weeks and 6 weeks, and measured for average mark and the degree of improvement by using the Activity Index. Results: Ischemic stroke, past history of stroke, hypertension, diabetes mellitus, risk factor of obesity, non-professional emergency treatment and hospitalizing time after 1 day from onset, high blood pressure, tachycardia pulse and high blood sugar in abnormal vital sign in acute stage, conscious, cognitive or communication disorder, motor aphasia, dysphagia, constipation for more than 3 days, urinary incontinence, visual field defect, insomnia, and chest discomfort in early stage of onset had a negative influence on functional evaluation. Conclusions: Type of stroke, past history, risk factors, emergency treatment and hospitalizing time after onset, abnormal vital sign and intercurrent symptoms in Acute stage were relevant factors in predicting functional evaluation of stroke.

• Journal of The Korean Society of Integrative Medicine
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• v.7 no.2
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• pp.31-38
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• 2019

Purpose : This study aimed to investigate the correlation between social participation and interpersonal relationships after stroke. Methods : Scores for the Korean version of the Reintegration to Normal Living Index (K-RNLI) and the Relationship Change Scale (RCS) were determined using a face-to-face test for 98 patients who had a stroke between September 3, 2018, and January 10, 2019. SPSS 22.0 was used for the analysis, and the correlation coefficient between social participation and interpersonal relationships was determined. Results : According to the patients' general characteristics, social participation was related to sex, type of lesion, and affected side, and interpersonal relationships showed a significant difference with respect to the affected side (p<.05). The analysis of social participation and interpersonal relationships of the subjects revealed a high correlation with total score (r=.364; p<.01), and all the items showed correlations except sensitivity (p<.05). Conclusion : Social participation and interpersonal relationships are important factors for reintegrating stroke patients into the community. The results of this study suggest a clinical basis for rehabilitation interventions in stroke patients.

• 재활복지
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• v.21 no.2
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• pp.247-259
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• 2017

We investigated the improvement of cognitive functions, activity of daily living (ADL), and quality of life (QoL) after hemorrhagic stroke and identified associated factors. For this research, twenty-five patients with a hemorrhagic stroke were enrolled. We measured cognitive function, activity of daily living (ADL), and quality of life (QoL) from 7 days to 12 months after onset of stroke. Then we analyzed the correlation between cognitive function and other risk factors. According to results, cognitive functions improved during 12 months with statistically significant differences. Other functions were similar to cognitive functions. Improvement of cognitive functions were correlated with age, the type of hemorrhagic stroke and Glasgow coma scale at 7 days after stroke. Overall, cognitive function in patients with hemorrhagic stroke recovered from acute to 12 months after onset of stroke. And, improvement of cognitive function at this phase were associated with age, the type of hemorrhagic stroke and GCS score at 7 days. These results would provide us an information to plan cognitive rehabilitation in patients with hemorrhagic stroke.

• The Journal of Internal Korean Medicine
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• v.37 no.4
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• pp.645-652
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• 2016

Objectives: To compare the effects of Eastern-Western integrative medical care (EWIM) and Western single rehabilitation therapy (WSRT) on the functional recovery of stroke patients.Methods: Seventy-six stroke patients were recruited retrospectively. The participants were divided into two groups: EWIM and WSRT. Data on age, sex, stroke-related risk factors, stroke type, neurological deficits according to the National Institutes of Health Stroke Scale (NIHSS), elapsed time to the initiation of rehabilitation, duration from the onset to follow up, initial functional status, and function after therapy for 3 mon were obtained from a review of the patients’ medical records. Between-group differences in functional outcomes were analyzed before and after treatment using the functional ambulation category (FAC), Fugl-Meyer assessment (FMA), modified Barthel Index-Korean version (K-MBI), and Euro-Quality of Life-5 Dimension (EQ-5D).Results: At 3-mon poststroke, all the functional outcome measures had improved in both groups (P<0.05). However, the improvements were greater in the EWIM group, and the improvement was statistically significant in the K-MBI (P=0.048) and EQ-5D (P=0.042).Conclusions: With respect to activities of daily living and health-related quality of life, EWIM is a more effective stroke therapy than WSRT.