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( Kwang Ha Lee ),( Mi Young Kim ),( Jung Wan Yoo ),( Sang Bum Hong ),( Chae Man Lim ),( Youn Suck Koh ) 대한내과학회 2010 The Korean Journal of Internal Medicine Vol.25 No.1
Background/Aims: Ventilating patients with acute respiratory distress syndrome (ARDS) in the prone position has been shown to improve arterial oxygenation, but prolonged prone positioning frequently requires continuous deep sedation, which may be harmful to patients. We evaluated the meaning of early gas exchange in patients with severe ARDS under prolonged (≥ 12 hours) prone positioning. Methods: We retrospectively studied 96 patients (mean age, 60.1 ± 15.6 years; 75% men) with severe ARDS (PaO2/FiO2 ≤ 150 mmHg) admitted to a medical intensive care unit (MICU). The terms PaO2 response and PaCO2 response represented responses that resulted in increases in the PaO2/FiO2 ratio of ≥ 20 mmHg and decreases in PaCO2 of ≥ 1 mmHg, respectively, 8 to 12 hours after first placement in the prone position. Results: The mean duration of prone positioning was 78.5 ± 61.2 hours, and the 28-day mortality rate after MICU admission was 56.3%. No significant difference in clinical characteristics was observed between PaO2 and PaCO2 responders and non-responders. The PaO2 responders after prone positioning showed an improved 28-day outcome, compared with non-responders by Kaplan-Meier survival estimates (p<0.05 by the log-rank test), but the PaCO2 responders did not. Conclusions: Our results suggest that the early oxygenation improvement after prone positioning might be associated with an improved 28-day outcome and may be an indicator to maintain prolonged prone positioning in patients with severe ARDS. (Korean J Intern Med 2010;25:58-65)
Sung Bin Cho,Hyun-Jo Kim,Heesu Kim,Kwang Ho Yoo 대한의학레이저학회 2018 MEDICAL LASERS Vol.7 No.2
Acne vulgaris is a common chronic inflammatory disease of the pilosebaceous units that usually begins in adolescence. This condition can lead to serious psychosocial problems, and can have adverse effects on an individual’s quality of life. Enlarged pores are a common complication of acne. Although a variety of approaches can be used to treat inflammatory acne vulgaris and enlarged pores, the disadvantages of a long healing time, dyspigmentation, prolonged erythema, and pain make these treatments unsatisfactory, particularly in Asians. Gas molecules, such as nitrogen, helium, and argon, can be ionized into a high-energy state of matter called “plasma.” While plasma has recently been shown to elicit several therapeutic effects in dermatologic areas, there is no consensus regarding the optimal implementation for the treatment of inflammatory acne vulgaris and enlarged pores. In this study, two patients were treated with acne vulgaris and enlarged pore using argon plasma. After a few sessions, the patients showed almost complete improvement with no remarkable side effects or recurrence over the duration of a few months. The results suggest that argon plasma can be used effectively and safely for the treatment of acne vulgaris, particularly inflammatory lesions and enlarged pores, in Asian patients.
( Kwang Ha Yoo ),( Wou Young Chung ),( Joo Hun Park ),( Sung Chul Hwang ),( Tae-eun Kim ),( Min Jung Oh ),( Dae Ryong Kang ),( Chin Kook Rhee ),( Hyoung Kyu Yoon ),( Tae-hyung Kim ),( Deog Kyeom Kim ) 대한결핵 및 호흡기학회 2017 Tuberculosis and Respiratory Diseases Vol.80 No.4
Background: Proper education regarding inhaler usage and optimal management of chronic obstructive pulmonary disease (COPD) is essential for effectively treating patients with COPD. This study was conducted to evaluate the effects of a comprehensive education program including inhaler training and COPD management. Methods: We enlisted 127 patients with COPD on an outpatient basis at 43 private clinics in Korea. The patients were educated on inhaler usage and disease management for three visits across 2 weeks. Physicians and patients were administered a COPD assessment test (CAT) and questionnaires about the correct usage of inhalers and management of COPD before commencement of this program and after their third visit. Results: The outcomes of 127 COPD patients were analyzed. CAT scores (19.6±12.5 vs. 15.1±12.3) improved significantly after this program (p<0.05). Patients with improved CAT scores of 4 points or more had a better understanding of COPD management and the correct technique for using inhalers than those who did not have improved CAT scores (p<0.05). Conclusion: A comprehensive education program including inhaler training and COPD management at a primary care setting improved CAT scores and led to patientsc better understanding of COPD management.
Yoo, Dae Kyoung,Lee, Hea Joeng,Kang, Chang Yong,Kim, Kwang Ho,Kim, Yung Hee,Sung, Jang Hyun Trans Tech Publications, Ltd. 2006 Diffusion and defect data. SSP. [Pt. B], Solid sta Vol.118 No.-
<P>Generally, solution nitriding (nitrogen permeation) is not applied to ferritic stainless steel, which has low nitrogen solubility in the ferrite phase. This study has investigated phase changes, nitride precipitations and hardness variations of Fe-11Cr-0.1Ti (409L) ferritic stainless steel following nitrogen permeation and tempering heat treatments. The strong affinity between nitrogen and Ti enabled the permeation of nitrogen to 409L ferritic stainless steel. The nitrogen-permeated surface changed to a martensitic phase with a hardness range of between 520 and 585Hv, depending on the nitrogen permeation temperature and time, while the surface nitrogen content was about 0.04%~0.05%. When tempering the NPSA (solution annealing after nitrogen permeation) treated specimen at 450 °C, a maximum hardness of 550Hv was obtained, probably due to the precipitation of very fine rod and square type titanium nitrides, while the minimum hardness of 365Hv was obtained at a tempering temperature of 650°C, owing to the precipitation of coarse TiN.</P>