http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
HRCT를 이용한 천식의 중증도에 따른 기도개형의 평가
임성용 ( Seong Yong Lim ),김양수 ( Yang Soo Kim ),최병휘 ( Byoung Whui Choi ) 대한내과학회 2007 대한내과학회지 Vol.73 No.6
Background: Airway remodeling is characterized by an increase in the airway wall thickness. We aimed to compare the airway wall thickness among asthmatic subjects with different severity and to examine its relation to pulmonary function and airway hyperresponsiveness. Methods: Thirty-seven adult asthmatics were assigned to mild (MA, n=17), moderate (MoA, n=11), and severe (SA, n=9) groups according to the Global Initiative for Asthma classification. Patients with more than 10 pack-years of smoking history were excluded. We measured the airway wall thickness (T) and internal diameter (d) using high-resolution computed tomography, and then calculated the external diameter (D). The T/D ratio was compared between the groups and correlations between the T/D ratio and pulmonary function (methacholine PC20) were assessed. Results: The mean T/D ratio was significantly higher in the MoA and the SA groups than in the MA group for the total airways (0.278±0.014, 0.281±0 .019 vs. 0.228±0.013; p=0.022, p=0.021, respectively). The mean T/D ratio was also higher in the SA group than the MA group for the small airways (0.313±0.018 vs. 0.253±0.013; p=0.009). However, there were no significant differences for the large airways. The mean T/D ratio negatively correlated with FEV1 (L) and FEV1 (% of predicted) in total airways (r=-0.519, p=0.001; r=-0.396, p=0.015), small airways (r=-0.567, p<0.001; r=-0.450, p=0.008) and large airways (r=-0.395, p=0.015; r=-0.351, p=0.033). The methacholine PC20 was not related to the T/D ratio. Conclusions: This study suggests that patients with moderate to severe asthma have greater airway remodeling than those with mild asthma, and the degree of airway wall thickening correlates to the severity of airflow obstruction. (Korean J Med 73:631-637, 2007)
임성용 ( Seong Yong Lim ) 대한결핵 및 호흡기학회 2010 Tuberculosis and Respiratory Diseases Vol.69 No.4
Pulmonary vascular disease is a category of disorders, including pulmonary hypertension, pulmonary embolism or chronic thromboembolic pulmonary hypertension, pulmonary vasculitis, pulmonary vascular disease secondary to chronic respiratory disease, and pulmonary vascular tumor and malformations. This article reviews the recent advances in this wide spectrum of pulmonary vascular diseases.
발관 실패의 위험 인자 및 발관 후 천음과 재삽관의 예측에 있어 Cuff Leak Test의 유용성과 의미 분석
임성용 ( Seong Yong Lim ),서지영 ( Gee Young Suh ),경선영 ( Sun Yong Kyung ),안창혁 ( Chang Hyeok An ),박정웅 ( Jung Woong Park ),이상표 ( Sang Pyo Lee ),정성환 ( Sung Hwan Jeong ),함형석 ( Hyoung Suk Ham ),안영미 ( Young Mee A 대한결핵 및 호흡기학회 2006 Tuberculosis and Respiratory Diseases Vol.61 No.1
연구배경: 발관 실패와 관련된 위험 인자를 살펴보고, 기관내 삽관의 합병증으로 인한 후두부 폐쇄와 PES로 인한 재삽관의 위험성을 발관 전에 미리 예측하기 위한 CLT 검사의 의의 및 제한점을 알아보고자 하였다. 방법: 24시간 이상 삽관과 인공 호흡기 치료 후 발관을 시도한 34명의 연속적인 환자들을 대상으로 발관 실패군에서 성공군과 차이를 보이는 인자를 살펴보고 CLT를 시행해서 PES와 재삽관을 예측하는 CLV, CLP의 기준값을 구하였다. 결과: 총 34명중 발관 실패는 6명(17.6%), PES는 3명(8.8%) 이었고 PES가 있던 3명은 모두 재삽관을 받았다. 발관 실패 환자에서 삽관 기간이 길었고, SAPS II score가 컸으며, 삽관 기간은 CLV, CLP와 역상관관계를 보였다. PES 양성 환자의 평균 CLV은 22.5±23.8㎖로 음성 환자의 233.3±147.1㎖보다 낮았고, CLP도 양성군에서 6.2±7.3%로 음성군의 44.3±24.7%보다 유의하게 낮았다. 가장 신뢰성 있는 CLV, CLP의 기준값은 50㎖, 14.7%였고 CLV의 민감도는 100%, 특이도 93.5%, 양성예측도 60%, 음성예측도 100%였고, CLP의 민감도는 100%, 특이도 87.1%, 양성예측도 42.9%, 음성예측도 100%였다. 결론: 삽관 기간이 길고 중증 질환 환자에서 발관 실패의 가능성이 높다. CLV, CLP가 감소되어 있을 경우 PES로 인한 재삽관 위험이 높아지므로 발관 시 주의가 필요하지만 발관의 불필요한 연기나 시도 자체에 대한 기준은 아닐 것으로 생각된다. Background: Extubation failure was associated with poor prognosis and high hospital mortality. Cuff leak test (CLT) has been proposed as a relatively simple method for detecting laryngeal obstruction that predispose toward postextubation stridor (PES) and reintubation. We examined the risk factors of extubation failure and evaluated the usefulness and limitation of CLT for predicting PES and reintubation. Methods: Thirty-four consecutive patients intubated more than 24 hours were examined. The subjects were evaluated daily for extubation readiness, and CLT was performed prior to extubation. Several parameters in the extubation success and failure group were compared. The accuracy and limitation of CLT were evaluated after choosing the thresholds values of the cuff leak volume (CLV) and percentage (CLP). Results: Of the 34 patients studied, 6 (17.6%) developed extubation failure and 3 (8.8%) were accompanied by PES. The patients who had extubation failure were more likely to have a longer duration of intubation and more severe illness. The patients who developed PES had a smaller cuff leak than the others: according to the CLV (22.5±23.8 vs 233.3±147.1㎖, p=0.020) or CLP (6.2±7.3 vs 44.3±24.7%, p=0.013). The best cut off values for the CLV and CLP were 50㎖ and 14.7%, respectively. The sensitivity, negative predictive value, and specificity of CLT were relatively high, but the positive predictive value was low. Conclusion: The likelihood of developing extubation failure increases with increasing severity of illness and duration of intubation. A low CLV or CLP (<50㎖ or 14.7%) is useful in identifying patients at risk of PES, but the CLT is not an absolute predictor and should not be used an indicator for delaying extubation. (Tuberc Respir Dis 2006; 61: 34-40)
임성용(Seong-Yong Lim),형재필(Jae-Phill Hyong),임홍우(Hong-Woo Lim),오근태(Geun-Tae Oh) 한국신뢰성학회 2018 신뢰성응용연구 Vol.18 No.1
Purpose: This study has developed the accelerated lifetime test method for smps for outdoor lighting LED through two factors of temperature and humidity. Methods: Acceleration condition was confirmed for each stress and model, and acceleration life test model was estimated according to acceleration condition. Results: As a result of confirming the accelerated life test model, in the case of humidity, acceleration was established only in the foreign products. Therefore, it is confirmed that the acceleration condition is insufficient. However, the estimated parameters for temperature are relatively constant. It is therefore suitable for power supply acceleration tests for outdoor lighting LEDs. Conclusion: The SMPS acceleration test for outdoor lighting LED can improve the availability of the product by developing an accelerated life test method that guarantees the reliability of the product.
AVC에 사용되는 피에조 센서의 고장 모드와 고장 메커니즘을 통한 개선
임성용 ( Seong Yong Lim ),장인혁 ( In Hyeok Jang ),이영주 ( Young Joo Lee ),임홍우 ( Hong Woo Lim ) 조선대학교 공학기술연구원 2015 공학기술논문지 Vol.8 No.2
In this paper, we verified the failure modes and failure mechanisms related to environmental factors of the piezoelectric sensors used in traffic survey equipment and conducted validation and evaluation through the product improvement. We used FMEA to analyze the failure modes and the failure mechanisms, presumed the most critical failure factor and confirmed predominant failure that the voltage drops and the capacitance increase due to the short of the piezoelectric sensor junction. We improved these failure mode through the aluminum inner of the junction and the tube inner by filling a resin to prevent moisture penetration. This method was verified through the test and evaluation.
BLDC Motor Driver의 고장 예측에 관한 연구
임성용 ( Seong-yong Lim ),정의효 ( Ui-hyo Jeong ),임홍우 ( Hong-woo Lim ) 조선대학교 공학기술연구원 2016 공학기술논문지 Vol.9 No.2
IIn this paper, we verified the problem of accelerated deterioration of the environmental testing in the BLDC motor driver. Then, we propose the methods to predict the failure on the BLDC Motor. We practice the FMEA and QFD through failure cases that occur in the field. Based on this, We estimate the failure mode failure mechanism. In addition, it was designed environmental test through the failure mode failure mechanism. In order to predict the failure, We will need for a method that can reproduce the failure. In addition, We will need a selection of the predicted value for predicting the failure. We convert the data of the BLDC motor using FFT, and suggests a method of predicting failure.