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Deep Neural Network based Disease Severity Regression for Diagnosis of Abdominal Aortic Aneurysm
Joo Hyeon Im(임주현),Sooho Kim(김수호),In Chan Lee(이인찬),Jin-Oh Hahn(한진오),Byeng D. Youn(윤병동) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
This paper proposes an abdominal aortic aneurysm severity regression algorithm by combining a physical model and deep learning. There are three typical problems in providing personalized medical service: 1) insufficiency of data, 2) dispersion of disease severity, 3) lack of individuality. In this study, blood pressure waveform data was obtained by implementing AAA in arterial tree simulation model. The data was acquired when there was a disease and when it was normal, and individual diversity was given through parameter change. Also, the shape of the aortic aneurysm was made into four types. The data showed a similar tendency to the blood pressure waveform in the presence of an aneurysm in the literature. Severity regression was performed through a deep neural network using data from blood pressure waveforms with various severity levels as input. As a result, it was confirmed that the regression performed well through the deep neural network.
Gwon, Hyeon-Cheol,Hahn, Joo-Yong,Park, Kyung Woo,Song, Young Bin,Chae, In-Ho,Lim, Do-Sun,Han, Kyoo-Rok,Choi, Jin-Ho,Choi, Seung-Hyuk,Kang, Hyun-Jae,Koo, Bon-Kwon,Ahn, Taehoon,Yoon, Jung-Han,Jeong, Myu Ovid Technologies Wolters Kluwer -American Heart A 2012 CIRCULATION - Vol.125 No.3
<P>The optimal duration of dual antiplatelet therapy (DAPT) after implantation of drug-eluting coronary stents remains undetermined. We aimed to test whether 6-month DAPT would be noninferior to 12-month DAPT after implantation of drug-eluting stents.</P>
The Beneficial Effects of Dioscorea Batatas Dence Peel Extracts on Skin Health
Yu-Hyeon Kim,Yu-Rim Lee,Tae-Won Kim,Tae-Hwan Lee,Hun-Seong Kim,Dong-Yup Hahn,Nam-Joo Kang 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
The demands for bioactive compounds from natural sources have increased in the cosmeceutical industry. Dioscorea Batatas Dence Flesh (DBF) with various bioactive substances is widely used in the cosmetic industry, while most of Dioscorea Batatas Dence Peel (DBP) is not utilized and is discarded. However, recent studies have shown that DBP has higher bioactive substances than DBF. In this study, we examined the skin biological activities of DBP extract from different solvents. DBP extracts obtained by 70% ethanol (70% EtOH DBP) and 95% ethanol (95% EtOH DBP) were shown to have skin whitening activity by inhibiting the melanin content of B16F10 cells and tyrosinase activity in 20 μg/mL. Ethyl acetate extract of DBP (EA DBP) also inhibited tyrosinase activity in 5 μg/mL. In HDF cells, treatment of DBP extracts after UVB irradiation (20 mJ/cm²) up-regulated type I pro-collagen (Pro-COL1A1) expression and down-regulated matrix metalloproteinase-1 (MMP-1) level. Additionally, DBP extracts inhibited MMP-1 activity in a dose-dependent manner. The results of this study indicated that DBP extracts can be used as cosmetic ingredients for skin-whitening and anti-photoaging.
안현주,허란희,김민정,조은정,한현주,손인자 韓國病院藥師會 2004 병원약사회지 Vol.21 No.3
This study is an attempt to investigate on the substitution of outpatients prescriptions dispensed in SNUH(Seoul National University Hospital) after launching the prescription-drug dispensing separation system in Korea. Out of the outpatient prescriptions issued in SNUH from July 2000 to September 2003, those substituted were chosen for the study. The percentage of prescriptions which were substituted and the rate for drug substitution which were not allowed has been on the decrease as the prescription-drug dispensing separation steadily gained its ground. Medicine most substituted at the pharmacies are diazepam, atenolol, furosemide, amitriptyline in order of frequency. The rate of substitution of prescriptions was highest in the department of plastic surgery, with the departments of neuropsychology, emergency, diagnostic radiology following. When substituting prescriptions, pharmacists sometimes failed to report the amount of the dispensed medicine(37%), the date of the prescriptions(14%), the name of the pharmacy(8%) and the pharmacist(7%). 29% of the substitution appeared to be done at the pharmacies located around SNUH, and 69% at the other pharmacies. We found examples of the reports not being made properly when substitutions were done to some degree. Also it was difficult to control the malpractice. And to improve this situation, some measures and efforts should be taken by pharmacies, pharmaceutical companies, and the government authorities.
Jihoon Kim,Joo Myung Lee,Taek Kyu Park,Jeong Hoon Yang,Young Bin Song,Jin-Ho Choi,Seung-Hyuk Choi,Hyeon-Cheol Gwon,Sang Hoon Lee,Joo-Yong Hahn 대한의학회 2020 Journal of Korean medical science Vol.35 No.1
Background: Although current guidelines recommend noninvasive stress tests prior to elective percutaneous coronary intervention (PCI), it is unknown whether antecedent exercise stress test (EST) affects the outcomes of patients undergoing PCI for stable ischemic heart disease (SIHD). This study aimed to investigate long-term outcomes in patients undergoing elective PCI with or without EST. Methods: We studied 2,674 patients undergoing elective PCI using drug-eluting stents for SIHD. Patients were divided into the 2 groups: the test group underwent EST with a positive result within 180 days prior to PCI (n = 668), whereas the non-test group did not undergo any noninvasive stress tests (n = 2,006). The primary outcome was all-cause death or myocardial infarction (MI). Results: Over 5 years after the index PCI, the risk of all-cause death or MI was significantly lower in the test group than in the non-test group in overall population (3.3% vs. 10.9%; adjusted hazard ratio [HR], 0.34; 95% confidence interval [CI], 0.22–0.55; P < 0.001), and in propensity score-matched population (668 pairs) (3.3% vs. 6.3%; adjusted HR, 0.52; 95% CI, 0.30–0.89; P = 0.018). However, the incidence of any revascularization was similar between the 2 groups in overall (16.7% vs. 16.8%; adjusted HR, 0.99; 95% CI, 0.79–1.25; P = 0.962) and matched population (16.7% vs. 18.3%; adjusted HR, 0.91; 95% CI, 0.70–1.19; P = 0.509). Conclusion: Patients who underwent elective PCI with EST had a reduced risk of all-cause death or MI than those undergoing PCI without stress tests.
Jihoon Kim,Joo Myung Lee,Seung-Hyuk Choi,Ki Hong Choi,Taek Kyu Park,Sung-Ji Park,Jeong Hoon Yang,Young Bin Song,Joo-Yong Hahn,Mi Ja Jang,Bon-Kwon Koo,Hyeon-Cheol Gwon 대한심장학회 2020 Korean Circulation Journal Vol.50 No.5
Background and Objectives: Although percutaneous coronary intervention (PCI) is recommended to improve symptoms in patients with stable ischemic heart disease (SIHD), improvement of exercise performance is controversial. This study aimed to investigate changes in exercise duration after PCI according to functional completeness of revascularization by comparing pre- and post-PCI exercise stress test (EST). Methods: Patients with SIHD were enrolled from a prospective PCI registry, and divided into 2 groups: 1) functional complete revascularization (CR) group had a positive EST before PCI and negative EST after PCI, 2) functional incomplete revascularization (IR) group had positive EST before and after PCI. Primary outcome was change in exercise duration after PCI and secondary outcome was major adverse cardiac events (MACE, a composite of any death, any myocardial infarction, and any ischemia-driven revascularization) at 3 years after PCI. Results: A total of 256 patients (149 for CR group, and 107 for IR group) were eligible for analysis. Before PCI, exercise duration was not significantly different between the functional CR and IR groups (median 540 [interquartile range; IQR, 414, 602] vs. 480 [402, 589] seconds, p=0.091). After PCI, however, the CR group had a significantly higher increment of exercise duration than the IR group (median 62.0 [IQR, 12.0, 141.0] vs. 30.0 [−11.0, 103.5] seconds, p=0.011). The functional CR group also had a significantly lower risk of 3-year MACE (6.2% vs. 26.1%; adjusted hazard ratio, 0.19; 95% confidence interval, 0.09–0.41; p<0.001). Conclusions: Functional CR showed a higher increment of exercise duration than functional IR.