초음파 백내장쪼개기와 작은 백내장쪼개기에 의한 백내장 수술의 비교

김덕수,김명준,김재용,차흥원,Deok-Soo Kim,Myoung-Joon Kim,Jae-Yong Kim,Hung-Won Tchah 대한안과학회 2005 대한안과학회지 Vol.46 No.11

Purpose: To compare effective phacoemulsification time (EPT), the severity of corneal swelling and corneal endothelial cell density after cataract surgery between the phaco chop method and the mini chop method. Methods: Cataract surgery was performed by phaco chop (15 eyes) or by mini chop (13 eyes) method in 28 eyes of 27 patients. The nuclear opacity of cataract grade was more than 5 on LOCS (Lens opacities classification system) III. EPT and the amount of irrigated BSS solution were measured during the operation. Corneal thickness (preoperative, immediate postoperative, postoperative 1 day, 1 week, 1 month, and 3 months) and corneal endothelial cell density (preoperative, postoperative 1month and 3 months) were measured. Results: The EPT of phaco chop group was 5.2 sec and that of mini chop was 1.0 sec (p=0.000). The amount of irrigated BSS was 193.7 ml and 170.4 ml in the phaco chop group and the mini chop group, respectively. The increase in corneal thickness was 3.2% and 0.9% at immediately after surgery (p=0.128), 19.0% and 10.5% at postoperative 1 day (p=0.088), 5.7% and 1.5% at postoperative 1 week (p=0.080), 0% and -1.3% at postoperative 1 month (p=0.717), and -0.4% and -0.6% at postoperative 3 months (p=0.890) in the phaco chop group and the mini chop group, respectively. Corneal endothelial cell density decreased 23.0% in the phaco chop group and 9.4% in the mini chop group at postoperative 1 month (p=0.005) and 22.9%, 12.6%, at 3 months respectively (p=0.036). Conclusions: The mini chop technique reduced permanent endothelial cell damage in comparison with the phaco chop method and might be more effective in decreasing corneal swelling during the early postoperative period than the phaco chop method.

BCD Platform과의 집적화에 적합한 고성능 Lateral Super Barrier Rectifier의 연구

김덕수,이희덕,Kim, Duck-Soo,Lee, Hi-Deok 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.6

This paper suggests a high performance lateral super barrier rectifier (Lateral SBR) device which has the advantages of both Schottky diode and pn junction, that is, low forward voltage and low leakage current, respectively. Advantage of the proposed lateral SBR is that it can be easily implemented and integrated in current BCD platform. As a result of simulation using TCAD, BVdss = 48 V, $V_F=0.38V$ @ $I_F=35mA$, T_j = $150^{\circ}C$ were obtained with very low leakage current characteristic of 3.25 uA.

SESSION 3 . CAD ; Generalized Voronoi Diagram and Its Applications

김덕수,황일규 ( Deok Soo Kim,Il Kyu Hwang ) 대한산업공학회 1992 대한산업공학회 추계학술대회논문집 Vol.1992 No.-

전자기 브레이크를 적용한 연속주조공정에서의 난류유동 및 응고의 3차원 해석

김덕수,김우승,Kim, Deok-Soo,Kim, Woo-Seung 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.10

A three-dimensional coupled turbulent fluid flow and solidification process were analyzed in a continuous casting process of a steel slab with Electromagnetic Brake(EMBR). A revised low-Reynolds number $k-{\varepsilon}$ turbulence model was used to consider the turbulent effects. The enthalpy-porosity relation was employed to suppress the velocity within a mushy region. The electromagnetic field was described by Maxwell equations. Tile application of EMBR to the mold region results in the decrease of the transfer of superheat to the narrow face, the increase of temperature in free surface region and most liquid of submold region, and the higher temperature gradient near the solidifying shell. The increasing magnetic flux density effects mainly to the surface temperature of the solidifying shell of narrow face, hardly to the one of wide face. It is seen that in the presence of EMBR a thicker solidifying shell is obtained at the narrow face of the slab.

코눈물관 부분폐쇄 치료시 마이토마이신 관류 여부에 따른 실리콘관 삽입술의 효과

김덕수,이용재.Deok Soo Kim. M.D.. Yong Jae Lee. M.D. 대한안과학회 2006 대한안과학회지 Vol.47 No.2

Purpose: To investigate the efficacy and safety of adjunctive Mitomycin C (MMC) during silicone intubation (SI) for treatment of acquired incomplete nasolacrimal duct obstruction (NLDO). Methods: Nineteen eyes with incomplete NLDO underwent SI only (group I). 20 different eyes were administered adjunctive 0.4 mg/ml MMC for 4 minutes (group II). Diagnosis of incomplete NLDO was based upon subjective complaints of tearing, dye disappearance testing, clinical evidence of epiphora, and nasolacrimal duct irrigation. Follow-up examination was conducted at 1, 3, and 6 months. Results: Follow-up ranged from 3 to 15 months (mean, 6.1 months). Twelve (63.1%) eyes in group I and 14 (70.0%) eyes in group II had a successful outcome and remained symptom-free. Four (21.1%) eyes in group I and three (15.0%) eyes in group II showed improvement but still experienced periodic epiphora. The difference was not statistically significant (p=0.873). Conclusions: SI as a treatment for incomplete NLDO provides complete relief or substantial improvement in a significant percentage of patients but MMC application during SI did not benefit outcome.

EMBR을 이용한 연주공정에서의 난류유동 및 응고에 대한 연구

김덕수,김우승,Kim, Deok-Soo,Kim, Woo-Seung 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.3

Two-dimensional turbulent fluid flow and solidification were investigated in a continuous casting process of a steel slab with electromagnetic field. The electromagnetic field was described by the Maxwell equations. The enthalpy-porosity relation was employed to suppress the velocity within a mushy region. A revised low-Reynolds number $k-{\varepsilon}$ turbulence model was used to consider the turbulent effects. It is shown that the temperature gradient in the casting direction in the case with EMBR becomes very weak compared to that of the case without EMBR. The results also show that the velocity profiles of the case with solidification are quite different from those of the case without solidification.

가와사끼병에서 감마글로불린 재투여가 필요했던 경우의 임상적 특징

김덕수,한윤수,한헌석,Kim, Deok-Soo,Hahn, Yoon-Soo,Han, Heon-Seok 대한소아청소년과학회 2002 Clinical and Experimental Pediatrics (CEP) Vol.45 No.11

목 적 : 저자들은 IVGG의 재투여가 필요했던 환아들의 검사소견 및 임상적 특징을 알아보고, 재투여가 필요 없었던 환아들과 비교하여 재투여가 필요한 환아를 예측할 수 있는지 알아보고자 하였다. 방 법: 1997년 10월부터 2001년 2월까지 적어도 6개월 이상의 추적관찰이 가능하였던 117명의 환자를 대상으로 통상적인 혈액검사, 심전도, 신호평준화 심전도, 심초음파도를 후향적으로 검토하였다. IVGG 한번 투여 후 recurrent fever 혹은 recrudescence fever를 보이는 6명(5.1%)에게는 IVGG를 한번 더 투여하였으며, 그래도 발열이 지속되는 경우는 methylprednisolone를 한번 내지 두번을 pulse로 주었다. 결 과: 전체 117명의 환아 중 23명(19.7%)에서 6개월 이상의 추적 기간중 심장의 합병증이 생겼으며, 초기 심장의 합병증이 23명에서, 후기 합병증은 4명에서 관찰되었다. IVGG의 재투여가 필요했던 환자는 6명(5.1%)이었으며, 초기의 심장합병증은 IVGG을 재투여한 군에서 1회 투여한 군에 비하여 높으며(P<0.0001), 장기적인 심장 합병증도 재투여군이 높았다(P<0.0001). IVGG 재투여군 중 m-PD까지 사용했던 군도 초기 합병증 및 후기 합병증이 1회 투여군에 비하여 현저히 높았다. 전체적인 합병증 유무에 따른 여러 가지 검사 소견 중 CRP만이 합병증이 있는 군에서 유의하게 증가되어 있었으며($11.94{\pm}7.43$ vs $6.97{\pm}6.41$ P<0.01), IVGG 재투여군이 1회 투여군보다 CRP가 현저히 증가되어 있었다($15.68{\pm}8.67$ vs $7.44{\pm}6.50$ P<0.05). 결 론: 초기 검사에서 CRP가 현저히 높은 군이 합병증의 발생빈도도 높고 IVGG을 재 투여할 가능성도 높다. 그러나, IVGG의 재투여가 관상동맥 합병증의 발생을 감소시키지는 못하였다. 이는 IVGG의 재투여가 필요했던 군에서는 CRP의 결과에서 보듯이 많은 양의 IVGG가 필요할 정도로 심한 염증반응이 있었거나 IVGG 자체로는 효과적으로 심장 후유증을 예방할 수 없기 때문이라고 생각된다. Purpose : Although the use of intravenous gamma-globulin(IVGG) in Kawasaki disease(KD) is effective in reducing clinical symptoms and coronary artery complications, 20-30% of patients have persistent or recrudescent fever and ongoing clinical symptoms. In these patients, the additional infusion of IVGG is considered. The authors studied the characteristics of patients who received IVGG retreatment, and compared them with the patients who did not need IVGG retreatment, for determination of IVGG retreatment. Methods : We reviewed the medical records of 117 KD patients who could be followed up at least six months. We studied the conventional laboratory findings, electrocardiogram(EKG), signal averaged ECG(SAECG) and echocardiogram. Results : Twenty three patients had early cardiac complications during the six months of follow-up. Four patients had late cardiac complications after six months. The early cardiac complication rate was higher in the IVGG retreatment group than the single infusion group(P<0.0001). The late complication rate was also higher in the retreatment group(P<0.0001). The patients who received methyl-prednisolone(m-PD) pulse therapy had much higher rates of early and late cardiac complications than those who received a single IVGG infusion. Among the clinical data and laboratory findings, only CRP increased significantly in patients who have had the cardiac complications. The IVGG retreatment group had increased CRP than the single infusion group. Conclusion : The patients with increased initial CRP may have an increased incidence of complications and an increased possibility of IVGG retreatment. We thought that retreated KD patients might have inflammations severe enough to need high dose IVGG as shown by high CRP levels, and IVGG retreatment could not prevent coronary artery lesions sufficiently.

HLA/RTI를 이용한 워게임 시뮬레이터와 통신 효과 시뮬레이터의 연동 시뮬레이션 연구

김덕수,배장원,박수범,김탁곤,Kim, Deok-Su,Bae, Jang Won,Park, Soo Bum,Kim, Tag Gon 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.1

Wargame simulators are widely used in the field of defence modeling and simulation. Because of increasing importance of communication effects on the warfare, the war game simulator is also required to reflect communication effects. One way to satisfy the requirement is the interoperation simulation between war game simulator and communication effect simulators. This paper shows the application of interoperation simulation between war game and communication effect simulators using HLA(High-Level Architecture)/RTI(RunTime Infrastructure). The war game simulator mainly deal with the engagement of troops and the troops communicate each other at the mission execution level. In the other hand, The communication effect simulator perform communication actions between the troops in the engineering level. Using the interoperation simulation, we can reflect the communication effects on the war game simulation. We show various applications of the interoperation simulation with the point of the war game and communication effect simulator. with a case study, we explain the interoperation simulation improves the reality and fidelity of the war game simulator and how the interoperation simulation can be applied to developing doctrines and real communication system.

황반부종 치료를 위한 유리체강내 트리암시놀론 주입의 효용성

김덕수,박혜련,윤영희,Deok-Soo Kim,Hye-Ryun Park,Young-Hee Yoon 대한안과학회 2005 대한안과학회지 Vol.46 No.10

Purpose: To investigate the effect of an intravitreal injection of triamcinolone acetonide (TA) for the treatment of macular edema due to several causes. Methods: One hundred eyes of 98 patients (DM, 58 eyes; branch retinal vein occlusion, 42 eyes) who received an intravitreal injection of 4mg (0.1cc) TA were included in this study. We performed preoperative and 1-, 3- and 6-month postoperative examinations that included stereoscopic biomicroscopy, fluorescein angiography (71 eyes) and optical coherence tomography (85 eyes). Pre- and postoperative visual acuity and IOP were measured. Results: After 1 month, visual improvement by 1 line or more was achieved in 62 eyes (62.0%). Sixty-five eyes (65.0%) and 49 eyes (57.6%) showed improved visual acuity after 3 and 6 months, respectively. Macular thickness decreased by 46.5% after 1 month, by 49.4% after 3 months, and by 50.8% after 6 months. There were no significant differences in visual improvement or thickness reduction between diabetic macular edema and edema secondary to branch retinal vein occlusion. There was no correlation between improvement of visual acuity and macular edema thickness decrease. Complications included a transient rise in intraocular pressure in 9 eyes and a secondary cataract in one eye. Conclusions: Intravitreal injection of triamcinolone acetonide 4 mg (0.1 cc) is an effective, simple and safe treatment for diabetic macular edema and macular edema secondary to branch retinal vein occlusion.

소아기 간질의 인지기능 평가와 정량적 뇌파의 활용 [종설]

김덕수(Deok-Soo Kim) 대한소아신경학회 2011 대한소아신경학회지 Vol.19 No.1

Cognitive dysfunction has been commonly reported in epilepsy and should be appropriately evaluated for children with epilepsy due to their developing cognition. Neuropsychological tests have been often performed to reveal the objective status of cognitive function. Advances in computer science has allowed quantitative electroencephalography (qEEG) to be widely used in various fields examining neuropsychiatric disorders. As such, we can investigate brain function through qEEG in a different manner and more fully understand the cortical network while performing tasks. Among qEEG methods, the frequency analysis is a method for looking at the mean or peak frequency, absolute or relative spectral power, and amplitude of each frequency band in the EEG. The qEEG analysis may help us evaluate cognitive dysfunction in childhood epilepsy, although some limitations and difficulties may exist.