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Computed tomographic bronchioarterial ratio for brachycephalic dogs without pulmonary disease
원성준,Ah-ra Lee,최지혜,최민철,윤정희 대한수의학회 2015 Journal of Veterinary Science Vol.16 No.2
The bronchoarterial (BA) ratio measured with computed tomography is widely used in human medicine to diagnose bronchial dilation or collapse. Although use of the BA ratio in veterinary medicine has been recently studied, this has not been evaluated in brachycephalic dogs predisposed to bronchial diseases including bronchial collapse. The purpose of this study was to establish BA ratios for brachycephalic dogs and compare the values with those of non-brachycephalic dogs. Twenty-three brachycephalic dogs and 15 non-brachycephalic dogs without clinical pulmonary disease were evaluated. The BA ratio of the lobar bronchi in the left and right cranial as well as the right middle, left, and right caudal lung lobes was measured. No significant difference in mean BA ratio was observed between lung lobes or the individual animals (p = 0.148). The mean BA ratio was 1.08 ± 0.10 (99% CI = 0.98∼1.18) for brachycephalic dogs and 1.51 ± 0.05 (99% CI = 1.46∼1.56) for the non-brachycephalic group. There was a significant difference between the mean BA ratios of the brachycephalic and non-brachycephalic groups (p = 0.00). Defining the normal limit of the BA ratio for brachycephalic breeds may be helpful for diagnosing bronchial disease in brachycephalic dogs.
선천성 태아 구강 기형종에서의 분만 중 자궁외 치료 1예
원성준,김진평,박정제,우승훈 대한이비인후과학회 2015 대한이비인후과학회지 두경부외과학 Vol.58 No.7
The ex utero intrapartum treatment (EXIT) is used for unborn fetuses in cases of predictable complications of postpartum airway obstruction. The delivered fetus is maintained on placental circulation while airway is established and this is carried out by a multidisciplinary team. Teratomas arising from the palate or pharynx may cause immediate life-threatening airway obstruction to the newborn. In our case, congenital oral teratoma was detected via prenatal ultrasound. The treating team determined that this may induce airway occlusion at birth and decided to perform an EXIT to secure an airway. On the day of birth, debulking of the tumor was performed and the fetus was successfully delivered. Vital signs were stable without intubation management.
원성준,정찬서,임병수 성균관대학교 기계기술연구소 2001 성균관대학교 논문집 기계기술편 Vol.4 No.1
In this paper, fatigue characteristics of P92 steel at high temperature are investigated to obtain basic mechanical properties and to study effect of temperature on fatigue crack growth behavior in P92 steel. Both tensile test and fatigue crack growth test were cared out at 55O℃, 600℃ and 650℃. From the tensile tests, yield strengths, tensile strengths, reduction rates in area and elongations were obtained. From the fatigue crack growth tests, fatigue crack growth rates were calculated at each test temperature and they were compared with each other to study the effect of temperature on fatigue crack growth rate.
초-중학교 전환기 사회적 자아개념, 또래 관계, 심리적 안녕감의 종단적 관계
원성준,강태림,김신혜 한국초등교육학회 2023 초등교육연구 Vol.36 No.3
The primary goal of this study was to investigate the role of social self-concept in the transition from elementary school to middle school. Specifically, we examined the longitudinal relations of social self-concept with peer relationship and psychological well-being. A total of 7,324 participants’ survey responses from Wave 1 (5th grade in elementary school) to Wave 3 (1st grade in middle school) of Korean Education Longitudinal Study 2013 data were analyzed. After evaluating measurement invariance, an autoregressive cross-lagged model was examined. Results showed that social self-concept significantly predicted subsequent changes in peer relationship and psychological well-being. Peer relationship and psychological well-being also predicted longitudinal changes in social self-concept, indicating the reciprocal relationships of social self-concept with peer relationship and psychological well-being. However, their predictive utilities were significantly different. In addition, the indirect effects of social self-concept and peer relationship from Wave 1 on social self-concept, peer relationship and, psychological well-being at Wave 3 were significant. Theoretical and educational implications of the present study were discussed.
원성준,김진평,박정제,우승훈 대한이비인후과학회 2012 대한이비인후과학회지 두경부외과학 Vol.55 No.2
Angiokeratoma is a rare, cutaneous disorder that typically manifests as multiple lesions and is often associated with a number of metabolic disorders. Although solitary cutaneous forms have been reported, localized lesions within the oral tongue have not been described so far. We report a 16-year-old male with a solitary pigmented lesion of his oral tongue tip. The lesion was a mixture of purple and white in color with a granulomatous appearance. Histopathological examination of the lesion obtained by excisional biopsy showed features consistent with angiokeratoma. We report a case of solitary angiokeratoma of the oral tongue tip and review the clinical and pathologic features of this unusual condition.