1.Pulsed tissue Doppler imaging of the left ventricular septal mitral annulus in healthy dogs.
Jihye CHOI ; Hyunwook KIM ; Junghee YOON
Journal of Veterinary Science 2013;14(1):85-90
This study evaluated pulsed TDI variables including the isovolumic time interval and duration of the major wave in a population of large healthy dogs. Longitudinal myocardial motion at the septal mitral annulus was evaluated with pulsed TDI in 45 healthy adult dogs. Maximal myocardial velocities, isovolumic time intervals, and duration of the myocardial waves were measured. The correlation between time intervals and velocity variables was also investigated. The mean maximal systolic velocity was 6.92 +/- 1.78 cm/sec, the mean early diastolic velocity (Em) was 6.58 +/- 1.81 cm/sec, the mean late diastolic velocity (Am) was 5.10 +/- 2.00 cm/sec, the mean isovolumic contraction time (IVCT) was 53.61 +/- 95.13 msec, and the mean isovolumic relaxation time (IVRT) was 26.74 +/- 57.24 msec. The early diastolic mitral inflow velocity (E)/Em ratio was 10.94 +/- 3.27 while the Em/Am ratio was 1.40 +/- 0.40. There was a negative correlation between Am duration and Am amplitude, and a positive correlation between the IVRT and Em/Am ratio (p < 0.05). The normal LV parameter using pulsed TDI method could be used as the reference range for identifying myocardial dysfunction in dogs.
Animals
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Dogs/*anatomy & histology
;
Female
;
Heart Ventricles/*ultrasonography
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Male
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Mitral Valve/*ultrasonography
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Ultrasonography, Doppler, Pulsed/methods/*veterinary
2.Background and Activities of the Samsung Ombudsperson Commission in Korea
Cheolsoo LEE ; Seong Kyu KANG ; Hyunwook KIM ; Inhee KIM
Journal of Preventive Medicine and Public Health 2019;52(4):265-271
OBJECTIVES:
The Samsung Ombudsperson Commission was launched as an independent third-party institution following an agreement among Samsung Electronics, Supporters for Health and Right of People in Semiconductor Industry (Banolim in Korean, an independent NGO), and the Family Compensation Committee, in accordance with the industry accident prevention measure required by the settlement committee to address the issues related to employees who allegedly died from leukemia and other diseases as a result of working at Samsung's semiconductor production facilities.
METHODS:
The Commission has carried out a comprehensive range of activities to review and evaluate the status of the company's occupational accidents management system, as well as occupational safety and health risk management within its facilities.
RESULTS:
Based on the results of this review, termed a comprehensive diagnosis, the Commission presented action plans for improvement to strengthen the company's existing safety and health management system and to effectively address uncertain risks in this area going forward.
CONCLUSIONS
The Commission will monitor the execution of the suggested tasks and provide advice and guidance to ensure that Samsung's semiconductor and liquid crystal display production lines are safer.
3.Development of Korean Head forms for Respirator Performance Testing
Hyekyung SEO ; Jennifer Ivy KIM ; Hyunwook KIM
Safety and Health at Work 2020;11(1):71-79
Background:
Protection from yellow dust and particulate matter is ensured by the use of respirators among the Korean citizens and workers. However, the manikins used to test the performance of the same were manufactured considering western facial specifications owing to which they do not represent Korean facial characteristics.
Methods:
Analysis of the data from the 6th 3D anthropometric survey of Koreans (Size Korea; 2010–2013) of 4,583 people aged 7 to 69 years was performed to obtain their facial dimensions. We subsequently clustered 44 facial measurements using Design X software, followed by the creation of the cluster centroid.
Results:
Three 3D head forms were developed—small, medium, and large, and their images were stored in “.stl” format for 3D printing. The facial widths and lengths of the three head forms were 127.1 mm × 90.6 mm, 143.2 mm × 104.0 mm, and 149.1 mm × 120.2 mm, respectively.
Conclusion
We developed manikin head forms according to the facial dimensions of the Korean population, which was essential in evaluating respiratory protective equipment. These head forms can be used to test the performance of respirators considering the facial dimensions of the Korean population.
4.Background and Activities of the Samsung Ombudsperson Commission in Korea
Cheolsoo LEE ; Seong Kyu KANG ; Hyunwook KIM ; Inhee KIM
Korean Journal of Preventive Medicine 2019;52(4):265-271
OBJECTIVES: The Samsung Ombudsperson Commission was launched as an independent third-party institution following an agreement among Samsung Electronics, Supporters for Health and Right of People in Semiconductor Industry (Banolim in Korean, an independent NGO), and the Family Compensation Committee, in accordance with the industry accident prevention measure required by the settlement committee to address the issues related to employees who allegedly died from leukemia and other diseases as a result of working at Samsung's semiconductor production facilities. METHODS: The Commission has carried out a comprehensive range of activities to review and evaluate the status of the company's occupational accidents management system, as well as occupational safety and health risk management within its facilities. RESULTS: Based on the results of this review, termed a comprehensive diagnosis, the Commission presented action plans for improvement to strengthen the company's existing safety and health management system and to effectively address uncertain risks in this area going forward. CONCLUSIONS: The Commission will monitor the execution of the suggested tasks and provide advice and guidance to ensure that Samsung's semiconductor and liquid crystal display production lines are safer.
Accident Prevention
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Accidents, Occupational
;
Compensation and Redress
;
Diagnosis
;
Humans
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Korea
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Leukemia
;
Liquid Crystals
;
Occupational Diseases
;
Occupational Health
;
Risk Management
;
Semiconductors
5.A prime determinant in selecting dialysis modality: peritoneal dialysis patient survival.
Kidney Research and Clinical Practice 2017;36(1):22-28
The number of patients with end-stage renal disease (ESRD) has rapidly increased, as has the cost of dialysis. Peritoneal dialysis (PD) is an established treatment for ESRD patients worldwide; it has a variety of advantages, including autonomy and flexibility, as well as economic benefits in many countries compared to hemodialysis (HD). However, the long-term survival rate of PD remains poor. Although direct comparison of survival rate between the dialysis modalities by randomized controlled trials is difficult due to the ethical issues, it has always been a crucial point when deciding which dialysis modality should be recommended to patients. Recently, in many countries, including the United States, Brazil, Spain, Australia, and New Zealand, the survival rate in PD patients has significantly improved. PD patient survival in Korea has also improved, but Korean PD patients are known to have higher risk of mortality and major adverse cardiovascular, cerebrovascular events than HD patients. Herein, we further evaluate why Korean PD patients had worse outcomes; we suggest that special attention should be paid to patients with diabetes, coronary artery disease, or congestive heart failure when they choose PD as the first dialysis modality in order to reduce mortality risk.
Australia
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Brazil
;
Cardiovascular Diseases
;
Coronary Artery Disease
;
Dialysis*
;
Ethics
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Heart Failure
;
Humans
;
Kidney Failure, Chronic
;
Korea
;
Mortality
;
New Zealand
;
Peritoneal Dialysis*
;
Pliability
;
Renal Dialysis
;
Spain
;
Survival Rate
;
United States
6.Literature Review of Forest Healing Therapy on Korean Adults
Young Ran CHAE ; Joo Hyun KIM ; Hyunwook KANG
Journal of Korean Biological Nursing Science 2018;20(2):122-131
PURPOSE: This study was conducted to ascertain the effectiveness of forest healing therapy by analyzing researches on forest healing therapy applied to Korean adults and to confirm that forest healing therapy can be used as a therapeutic intervention program for elderly nursing or rehabilitation nursing. METHODS: We searched 972 research papers on forest therapy applied to Korean adults. We reviewed appropriate 25 research papers with experimental design among them in the final analysis. RESULTS: Forest healing therapy had physiological and psychosocial effects. First of all, it showed physiological effects to reduce stress index such as heart rate variation. Forest therapy also improved melatonin level in blood of middle-aged women with menopause and increased alpha wave in electroencephalogram and decreased lipid level and superoxide dismutase in blood. Second, forest healing therapy showed psychosocial effects to reduce depression and to improve mental health. But the effects appeared differently depending on the implementing type, period of forest healing therapy, and the professionalism of therapists. Therefore, if forest healing therapy would be applied to nursing, it should be based on its key principle, in other words, its principle of action-interaction-response of forest healing therapy. CONCLUSION: The results of this study could be used to develop a forest healing program as an intervention of nursing.
Adult
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Aged
;
Depression
;
Electroencephalography
;
Female
;
Forests
;
Heart Rate
;
Humans
;
Melatonin
;
Menopause
;
Mental Health
;
Nursing
;
Professionalism
;
Rehabilitation Nursing
;
Research Design
;
Superoxide Dismutase
7.Multidisciplinary approaches to downstaging hepatocellular carcinoma: present and future
Sang-Youn HWANG ; Hyunwook CHOI ; Wan JEON ; Ryoung-Go KIM
Journal of Liver Cancer 2024;24(2):171-177
Downstaging of hepatocellular carcinoma (HCC) is typically defined as the reduction in size or number of viable tumors through locoregional therapy (LRT), aiming to meet the established criteria for liver transplantation (LT). According to the Barcelona Clinic Liver Cancer (BCLC) staging system, a subgroup of patients with BCLC-B may benefit most from downstaging therapies. The United Network Organ Sharing downstaging protocol identifies potential candidates for downstaging by setting out ‘inclusion criteria’ and defining ‘successful downstaging.’ Additionally, the protocol considers factors related to tumor biology, such as an alphafetoprotein level <500 ng/mL after LRT. Reports indicate that successful downstaging rates following LRT are about 50%, with post- LT recurrence rates comparable to those of patients within the Milan criteria. A comprehensive multicenter US study on 10-year outcomes post-LT after downstaging showed 10-year post-LT survival and recurrence rates of 52.1% and 20.6%, respectively, for patients whose disease was downstaged; this compares to 61.5% and 13.3% for those consistently within the Milan criteria. Recently, the development of effective systemic treatments for HCC, such as immuno-oncologic agents, has provided additional opportunities for downstaging. Numerous clinical trials are exploring a multidisciplinary approach (MDA) combining LRT and systemic therapy. Although concrete evidence of the superiority of MDA for HCC downstaging is lacking, some retrospective studies and phase I and II trials have shown promising results regarding the efficacy and safety of MDA for this purpose. In this review, we will also discuss the future of MDA protocols in downstaging for improved clinical outcomes.
8.Multidisciplinary approaches to downstaging hepatocellular carcinoma: present and future
Sang-Youn HWANG ; Hyunwook CHOI ; Wan JEON ; Ryoung-Go KIM
Journal of Liver Cancer 2024;24(2):171-177
Downstaging of hepatocellular carcinoma (HCC) is typically defined as the reduction in size or number of viable tumors through locoregional therapy (LRT), aiming to meet the established criteria for liver transplantation (LT). According to the Barcelona Clinic Liver Cancer (BCLC) staging system, a subgroup of patients with BCLC-B may benefit most from downstaging therapies. The United Network Organ Sharing downstaging protocol identifies potential candidates for downstaging by setting out ‘inclusion criteria’ and defining ‘successful downstaging.’ Additionally, the protocol considers factors related to tumor biology, such as an alphafetoprotein level <500 ng/mL after LRT. Reports indicate that successful downstaging rates following LRT are about 50%, with post- LT recurrence rates comparable to those of patients within the Milan criteria. A comprehensive multicenter US study on 10-year outcomes post-LT after downstaging showed 10-year post-LT survival and recurrence rates of 52.1% and 20.6%, respectively, for patients whose disease was downstaged; this compares to 61.5% and 13.3% for those consistently within the Milan criteria. Recently, the development of effective systemic treatments for HCC, such as immuno-oncologic agents, has provided additional opportunities for downstaging. Numerous clinical trials are exploring a multidisciplinary approach (MDA) combining LRT and systemic therapy. Although concrete evidence of the superiority of MDA for HCC downstaging is lacking, some retrospective studies and phase I and II trials have shown promising results regarding the efficacy and safety of MDA for this purpose. In this review, we will also discuss the future of MDA protocols in downstaging for improved clinical outcomes.
9.Multidisciplinary approaches to downstaging hepatocellular carcinoma: present and future
Sang-Youn HWANG ; Hyunwook CHOI ; Wan JEON ; Ryoung-Go KIM
Journal of Liver Cancer 2024;24(2):171-177
Downstaging of hepatocellular carcinoma (HCC) is typically defined as the reduction in size or number of viable tumors through locoregional therapy (LRT), aiming to meet the established criteria for liver transplantation (LT). According to the Barcelona Clinic Liver Cancer (BCLC) staging system, a subgroup of patients with BCLC-B may benefit most from downstaging therapies. The United Network Organ Sharing downstaging protocol identifies potential candidates for downstaging by setting out ‘inclusion criteria’ and defining ‘successful downstaging.’ Additionally, the protocol considers factors related to tumor biology, such as an alphafetoprotein level <500 ng/mL after LRT. Reports indicate that successful downstaging rates following LRT are about 50%, with post- LT recurrence rates comparable to those of patients within the Milan criteria. A comprehensive multicenter US study on 10-year outcomes post-LT after downstaging showed 10-year post-LT survival and recurrence rates of 52.1% and 20.6%, respectively, for patients whose disease was downstaged; this compares to 61.5% and 13.3% for those consistently within the Milan criteria. Recently, the development of effective systemic treatments for HCC, such as immuno-oncologic agents, has provided additional opportunities for downstaging. Numerous clinical trials are exploring a multidisciplinary approach (MDA) combining LRT and systemic therapy. Although concrete evidence of the superiority of MDA for HCC downstaging is lacking, some retrospective studies and phase I and II trials have shown promising results regarding the efficacy and safety of MDA for this purpose. In this review, we will also discuss the future of MDA protocols in downstaging for improved clinical outcomes.
10.Multidisciplinary approaches to downstaging hepatocellular carcinoma: present and future
Sang-Youn HWANG ; Hyunwook CHOI ; Wan JEON ; Ryoung-Go KIM
Journal of Liver Cancer 2024;24(2):171-177
Downstaging of hepatocellular carcinoma (HCC) is typically defined as the reduction in size or number of viable tumors through locoregional therapy (LRT), aiming to meet the established criteria for liver transplantation (LT). According to the Barcelona Clinic Liver Cancer (BCLC) staging system, a subgroup of patients with BCLC-B may benefit most from downstaging therapies. The United Network Organ Sharing downstaging protocol identifies potential candidates for downstaging by setting out ‘inclusion criteria’ and defining ‘successful downstaging.’ Additionally, the protocol considers factors related to tumor biology, such as an alphafetoprotein level <500 ng/mL after LRT. Reports indicate that successful downstaging rates following LRT are about 50%, with post- LT recurrence rates comparable to those of patients within the Milan criteria. A comprehensive multicenter US study on 10-year outcomes post-LT after downstaging showed 10-year post-LT survival and recurrence rates of 52.1% and 20.6%, respectively, for patients whose disease was downstaged; this compares to 61.5% and 13.3% for those consistently within the Milan criteria. Recently, the development of effective systemic treatments for HCC, such as immuno-oncologic agents, has provided additional opportunities for downstaging. Numerous clinical trials are exploring a multidisciplinary approach (MDA) combining LRT and systemic therapy. Although concrete evidence of the superiority of MDA for HCC downstaging is lacking, some retrospective studies and phase I and II trials have shown promising results regarding the efficacy and safety of MDA for this purpose. In this review, we will also discuss the future of MDA protocols in downstaging for improved clinical outcomes.