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한창덕 ( Chang Dok Han ),김영효 ( Young Hyo Kim ),김규성 ( Kyu Sung Kim ),최호석 ( Ho Seok Choi ) 대한외상학회 2012 大韓外傷學會誌 Vol.25 No.1
Traumatic pseudoaneurysms in the head and neck region are very rare. Particularyly, pseudoaneurysms of the internal maxillary artery are known to be very rare. The authors report a 20-year old male who was diagnosed as having a pseudoaneurysm of the internal maxillary artery. The cause was assumed to be a mandible ramus fracture. When he visited our emergency room, we did not consider a pseudoaneurysm because of his other life-threatening conditions. Fortunately, he re-visited our hosipital before the aneurysm ruptured. He was diagnosed with angiography and was treated by using embolization with glue. The rupture of the pseudoaneurysm could have caused a life-threatening hemorrhage. (J Korean Soc Traumatol 2012;25:32-35)
Symposium 7 : Plant Biochemistry ; Identification of rice genes with Ac/Ds mediated gene trap system
한창덕 ( Chang Deok Han ),( Byoun Il Je ),( Su Hyun Park ),( Chul Min Kim ),( Sung Han Park ),( Yun Jeong Na ),( Jung Ja Lee ),( Byeong Geun Oh ),( Nam Min Hee ),( Gi Hwan Yi ),( Ho Yong Kim ) 한국생화학분자생물학회 (구 한국생화학회) 2000 추계학술대회집 Vol.2000 No.-
설문지를 통한 양성돌발두위현훈의 진단 및 병소위치 추정
박성민,김규성,한창덕,이우기 대한평형의학회 2013 Research in Vestibular Science Vol.12 No.3
Background and Objectives: Diagnosis of patients with dizziness requires detailed history taking. Using a questionnaire may be helpful for accurate and rapid diagnosis. However, no reliable questionnaire was developed yet. The purpose of this study is to know if authors’ questionnaire is reliable for diagnosing of benign paroxysmal positional vertigo (BPPV) and deciding affected canal. Materials and Methods: We evaluated 45 patients presenting with positional vertigo from January 2012 to September 2012. We developed a questionnaire by extracting specific questions on positional vertigo from the Dizziness Handicap Inventory and the activities-specific balance confidence scale. All the patients answered the questionnaire, followed by Dix-Hallpike test and head rolling test. Affected canal suspected by the questionnaire was analyzed and compared with affected canal confirmed by positioning test. Results: Among 45 patients, 24(53%) was diagnosed with BPPV by positioning test. Patients with posterior canal BPPV (p-BPPV) answered positive of dizziness in pitch axis movement more frequently than roll and yaw, but it was not statistically significant (p>0.05). In the patients with lateral canal BPPV (l-BPPV), no significant difference was observed among three axes. Concordance rate of suspected canal by the questionnaire and positioning test was 36% in p-BPPV and 39% in l-BPPV. Conclusion:Diagnosis of BPPV and affected canal by the questionnaire based on movement axis is limited in this study. Development of more reliable questionnaire is necessary.
공기산화법으로 제조한 Magnetite의 물분산매 자성 유체의 특성
신학기,장현명,한창덕,김태옥 한국세라믹학회 1990 한국세라믹학회지 Vol.27 No.1
Magnetite for Water-based ferrofluid was synthesized by air oxidation of aqueous suspension in the pH range 7-12 at $65^{\circ}C$. The optimum condition of magneite formation was delineated by examining various physicochemcial properties such as Fe2+ content, phase characteristics, MHC and $\sigma$max. The point of zero charge of iron oxide powders obtained at various pH conditions were correlated with the oxidation state of Fe in the iron oxide. The magnetite powder prepared at pH 9 ws dispersed using sodium oleate and sodium dodecylbenzenesulfonate (SDBS) as dispersants, and the dispersion characteristics of the magnetite ferrofluid were examined by means of the fraction of solid dispersed, zeta potential data and FT-IR spectrum. A simple calculation on the potential energy of two interacting magnetite particles showed that the dispersion stability was directly correlated with height of the potential energy barrier or the shape of zeta potential.