이하 삼각부에 발생한 낭미충증 1례

백병준,유창수,오천환 中央醫學社 1996 中央醫學 Vol.61 No.12

Cysticercosis is an infection by the larval stage of the tapeworm Taenia solium. It prevails in regions of poverty and where personal hygiene. is poor. The cysticerci in man lodge in subcutaneous and intermuscular tissue, brain, eye, heart, liver and abdominal cavity in orders. Cases in the region of the head and neck are rarely reported. Recently the authors had experienced a case of cysticercosis of submental triangle area. We report this case with review of the literatures.

이하선에 발생한 근상피종 1례

백병준 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

In a normal gland, myoepithelial cells are located between the epithelial cells and the basal larmina of acini and intercalated ducts. Myoepithelioma is rare, generally benign neoplasm that accounts for less than 1% of all salivary tumors. The most common locations of myoepithelioma of the head and neck are the parotid gland and the palate. Myoepithelioma resembles pleomorphic adenomas in its appearance and growth pattern. We experienced a case of myoepithelioma that arising in the parotid gland. The mass was removed with a margin of uninvolved tissue. Histologic features showed that the tumor was composed of spindle-shaped cells and plasmacytoid(hyaline) cells.

비용에서 상피 성장인자 수용체의 발현

백병준 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1

Background and Objectives : Epidermal growth factor(EGF), mediated by its receptor(EGFR), is a potent stimulator of cell proliferation and differentiation. The purpose of this study is to evaluate the role of EGFR in the pathogenesis of nasal polyps. Materials and Method : Immunohistochemical stain was performed on 15 nasal polyp specimens obtained in patients who underwent endoscopic sinus surgery and 9 normal nasal mucosa from inferior turbinate. A monoclonal antibody recognizing an epitope of intracellular domain of EGFR was used in a streptavidin-biotin complex technique. Results : EGFR was expressed in 55.6% of normal nasal mucosa, and positive cells were noted mainly in epithelium and glands of lamina propria. In the epithelium which was stained, positive cells were localized mainly in upper layer in the form of coarse granule in the cytoplasm. In the glands which were stained, positive cells were found in the form of diffuse of coarse granule in the cytoplasm. EGFR was expressed in 53.3% of nasal polyps. The location and staining pattern of positive cells were similar to the findings of normal nasal mucosa. Conclusion : EGFR may not play a role in the formation and proliferation of nasal polyps.

쉴리렌 간섭계에 의한 사각덕트내 후향계단후 유동에서의 혼합대류 전열에 관한 연구

백병준,박복춘,김진택,Baek, B.J.,Pak, B.C.,Kim, J.T. 대한설비공학회 1994 설비공학 논문집 Vol.6 No.1

The flow and heat transfer characteristics behind a backward facing step located in a vertical channel has been studied. In this study, the numerical prediction has been performed by solving the Navier-Stokes equation and energy equation simultaneously with the SIMPLE algorithm embedied in TEACH code. Local heat flux was measured by using Schlieren Interferometer. The flow visualization was performed using the cylindrical lens and the laser beam that is scattered by the supplied glycerine particles. The velocity and temperature distributions, recirculation region, reattachment length, and local heat flux are obtained under the various parameters to investigate the buoyancy effect on the flow and heat transfer characteristics behind the step.

고품질 질화물 반도체 박막 성장을 위한 반응로 구조 및 열적 조건에 관한 연구

백병준,이철로,박복춘,김진택 대한기계학회 2004 大韓機械學會論文集B Vol.28 No.12

비대칭적으로 가열된 유한 수직덕트내 유동의 혼합대류에 관한 연구

백병준,B.F. Armaly 대한기계학회 1991 대한기계학회논문집 Vol.15 No.5

본 연구에서는 유한 길이를 갖는 수직 덕트내 공기 유동의 속도 분포를 LDV를 사용하여 측정하며 유동 특성에 미치는 가열정도, 덕트간격 및 입구소도등의 영향을 보고하고자 한다. 또한 속도분포, 온도분포 및 열전달에 미치는 부력의 영향을 수치 적으로 예측하여 그 타당성을 검증하고자 한다.

Surgical Results of Endoscopic Dacryocystorhinostomy and Lacrimal Trephination in Distal or Common Canalicular Obstruction

백병준,황규린,정동호,김이석,신재민,이흥만 대한이비인후과학회 2012 Clinical and Experimental Otorhinolaryngology Vol.5 No.2

Objectives. To evaluate the surgical outcomes of endoscopic dacryocystorhinostomy followed by canalicular trephination and silicone stenting in patients with distal or common canalicular obstructions. Methods. The medical records of 29 patients (31 eyes) from January 2001 to December 2009 who underwent endoscopic dacryocystorhinostomy followed by canalicular trephination and silicone tube insertion for the treatment of distal or common canalicular obstructions were retrospectively reviewed. The level of obstruction was confirmed by intraoperative probing. The outcome of the surgery was categorized as a complete success, partial success, or failure according to the functional and anatomic patency. Results. The average age of the patients was 52 years. The duration of silicone intubation ranged from 4 to 11 months with an average of 5.7±1.6 months. The follow-up period after stent removal ranged from 4 to 15 months with an average of 8.2±3.3 months. Complete success was achieved in 25 out of 31 eyes (80.6%), partial success in 4 out of 31eyes (12.9%), and failure in 2 out of 31 eyes (6.5%). Conclusion. Endoscopic dacryocystorhinostomy followed by canalicular trephination and silicone stent intubation may be safe and considered as an initial treatment of patients with distal or common canalicular obstructions

수직으로 놓인 후향계단위를 흐르는 유체유동에 미치는 부력의 영향에 관한 연구

백병준,박복춘,김진택 대한기계학회 1993 대한기계학회논문집 Vol.17 No.5

본 연구에서는 수직 평판에 위치한 후향계단면 위를 흐르는 유체유동의 특성, 즉 재부착점, 박리 및 재순환 영역에 미치는 부력의 영향을 수치해석 및 실험으로 조사한다. 유동의 가시화를 통해 재부착점의 위치를 측정하며 레이저도플러 유속계 (5W,Ar-Ion,DANTEC)에 의한 속도분포 및 CTA(constant temperature anemoneter,55M01 과 55M20, DANTEC)를 사용한 온도분포를 동시에 측정 함으로써 유동 특성 및 열전달에 미치는 부력의 영향을 검토한다. Numerical analysis and measurements of the velocity and temperature distributions in buoyancy assisting laminar mixed convection flow over a vertically located, two-dimensional backward-facing step are reported. Laser-Doppler Velocimeter and Constant Temperature Anemometer operated in constant current were used to measure simultaneously the velocity and temperature distributions in the recirculation region downstream of the step. The reattachment length was measured by using flow visualization technique for different inlet velocities, wall temperatures and step heights. While the reattachment length $X_r$ increases as the inlet velocity or step height increase, it decreases as the buoyancy force increases, causing the size of the recirculation region to decrease. For the experimental range of $Gr_s$/$Re_{s}^{2}$$\times$$10^3$<17, a correlation equation for the reattachment length can be given by $X_{r}=1.05(2.13+0.021 Re_{s})exp$ $(-33.7_s^{-0.186}/Gr_{s}/Re_{s}^2).$ The Nusselt number is found to increase and the location of its maximum value moves closer to the step as the buoyancy force increases. The location of the maximum Nusselt number occurs downstream of the reattachment point, and distance between the reattachment point and the location of the maximum Nusselt mumber increases as the buoyancy force increases. Computational prediction agrees favorably well with measured results.

부비동 악성 종양의 임상적 분석

백병준,유명상,신재민,김효진,박훈,김장묵,오천환 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.2

Background and Objectives : Paranasal sinus cancer is rare when compared with cancers of other sites. Because paranasal sinus is anatomically located adjacent to the orbit and skull base, it is difficult to remove the tumor completely with tumor free margin in advanced paranasal sinus cancer. This report was conducted to investigate clinical characteristics, histologic type and treatment outcome of paranasal sinus cancer. Material and Methods : Twenty-six cases with paranasal sinus cancer diagnosed at the Department of otolaryngology-Head and Neck Surgery, Soonchunhyang Cheonan Hospital from January 1991 to September 2000 were studied by chart review, telephone interview and letters retrospectively. Results : The male to female ratio was 4.2 : 1. Most patients were 6th and 7th decade. The maxillary sinus was the most commonly affected site(61.5%), followed by the ethmoid sinus(34.6%). The most common histologic type of malignancy was squamous cell carcinoma(57.6%), followed by adenocarcinoma(19.2%). Most patients presented with T_(3)/T_(4) or locally advanced disease, N_(0)(91.3%), and M_(0)(100%) Sixtynine pertcent of this study group underwent sugery as part of a mutimodality curative treatment plan or alone as curative treatment. Eighteen patients(69.2%) developed recurrent disease at a median time of 278 days after initial treatment. Kaplan-Meier analysis revealed the 5-year disease specific survival was 34.6%. Conclusion : Most patients with paranasal sinus cancer presented with locally advanced disease. Adanced T stage was highly predictive of poor prognosis. Recurrence rate was high and mostly occured within the second year after treatment.

비내시경적 누낭비강문합술시 비점막 피판 및 누낭 피판 보존의 유용성

백병준,조문식 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

background and Objectives