"Blow-out골절"의 임상적 고찰(54례)

안덕선,한승규,구상환,한재식 大韓成形外科學會 1995 Archives of Plastic Surgery Vol.22 No.5

This retrospective study includes consecutive 54 Blow-out fractures patients to whom underwent surgical correction (June 1988-Feb 1994) and 25 patients have been followed up for more than 1 year. The diagnoses of blow out fracture was made through a physical examination, X-ray, and CT and It is confirmed at the time of surgery. Initial physical examination revealed limitation of ocular motion and diplopia in all 25 patients, and infraorbial nerve hypoestesia in 18 patients, and enophthalmos in 1 patient. There were 27 patients who had associated ocular injury including subconjunctival hemorrhage, angle recession and iris sphincter damage. and the three most common causes of blow-out fractures were traffic accident, fist blow and fall down. The latent period between injury and surgical intervention was average of 8 days and the longest time was 12 days. Surgical approach was done by subciliary incision and autogenous (10 cases) or synthetic (37 cases) implant was inserted over the fracture site in 47 patients. The floor and medial wall of orbit were the frequent site of blow-out fracture in this retrospective study. Among 28 patients who have been followed up for more than 1 year, 3 patients had diplopia persistently which developed only when the patient was tired, and 5 patients had late developed enophthalmos. We found that early surgical reduction of blow-out fracture with implant gave a favorable results without any significant complications.

干拓地 浚渫土의 堆積特性에 關한 硏究

都德鉉,安成鎬,金善柱 건국대학교 산업기술연구원 1995 건국기술연구논문지 Vol.20 No.-

간척지 준설토의 퇴적 특성을 구명하기 위하여 충남 당진군 일원의 서남해안 干拓綜合開發事業 石門地區에서 준설공사를 하고 있는 排水閘門 引水路 浚渫土를 시료로 채취하여 시험분석한 결과를 요약하면 다음과 같다. 1) 本 試驗圃의 토질은 실트질 점토로서 浚渫 排砂管 吐出口 부위별 含泥率은 상부 7.36%, 중간부 18.85%, 하부 50.95%이고 평균값은 25.72%이다. 2) 堆積狀況은 浚渫 排砂管 吐出口를 중심으로 주위 약 30m까지는 粒子가 큰 모래와 점토 덩어리가 퇴적되고, 유속이 작은 원거리에서는 細砂 및 실트가, 精水狀態에서는 粘質土가 퇴적되므로 약간의 유실이 발생되어도 준설시의 유속을 크게 하면 粗粒子만 퇴적되어 양질의 지반을 얻을 수 있는 것으로 나타났다. 3) 浚渫土의 콘支持力 변화는 준설 3개월 후 준설 배사관을 중심으로 40∼60m 범위의 콘支持力(qc)은 2.0kgf/㎠, 一軸壓縮强度(qu)는 0.16~0.20kgf/㎠ 정도로서 超濕地에서 濕地로 支持力 증가 속도가 상당히 빠르고 60m 이상에서의 콘支持力(qc)은 0.5~1.0Kgf/㎠ 정도, 一軸壓縮强度(qu)는 0.02~0.06kgf/㎠로서 매우 연약한 超濕地임을 알 수 있었다. 4) 준설토의 강도증진은 자중압밀에 의한 강도증가보다 건조수축에 의한 강도 증진이 빠르고 크기 때문에 이 특성을 이용해서 浚渫盛土高를 20∼30㎝로 하여 건조수축시킨 후 반복적으로 浚渫盛土를 실시한다면 양호한 지반을 얻을 수 있을 것으로 생각된다. 5) 浚渫 排砂管 설치는 本管에 分岐될 지점에 직경이 다른 티(T형, Y형)를 가설해 두어 排砂管 移設에 필요한 경비를 절감할 수 있고, 排砂管 간격을 30m 전후로 배치하면 地盤改良에 필요한 공사비를 절감할 수 있는 것으로 나타났다. In order to study the deposition characteristics of dredged materials in the reclaimed area, deposition process of dredged materials and soil strength parameters in the Sukmoon Project area, which is located in the southeastern coast, have been analyzed with in-situ tests and laboratory research. The results obtained are as follows: Soil texture of the tested plot was silty clay, and the soil content of discharge flow by the part of pipe outlet was 7.36% at the upper part, 18.85% at the middle part and 50.95% at the lower part. Three different characteristics have been investigator from the observations on the relationship between the discharge flow velocity and soil particle size. Coarse sand and clusters of clay were deposited within the range of approximately 30meters from the outlet of discharge pipe where the flow velocity was relatively high. From 30meters to 60meters, finer particles were accumulated, and beyond this range, very fine clay particles were sedimented. So the results showed that the strength properties of dredged materials could be increased as the discharge velocity increased. In three months after the completion of dredging that was carried out within a range of 40∼60meters from the outlet and at a depth of 1.0m below the ground surface, the cone resistance(qc) and unconfined compression strength(qu) was 2.0kgf/㎠ and 0.16~0.20kgf/㎠, respectively, indicating that the increasing rate of bearing capacity is high. Beyond this range, qc and qu varied 0.5~1.0Kgf/㎠ and 0.02~0.06kgf/㎠, respectively, which is quite soft. Shear strength of the dredged materials increased evidently resulted from the shrinkage of drying rather than consolidation caused by the self-weight of deposition. Setting of the desilting scour pipe needs a "T" or "Y" type branch pipe of a different diameter to save the cost of setting. From the result of this study, it was found that if the desilting scour pipe is built with 30m spacing, the cost for land improvement can be saved.

안와골파열골절의 임상적 고찰

한승규,안덕선 최신의학사 1993 最新醫學 Vol.36 No.6

레이저 박피술의 피부면적 감소효과와 레이저 punch out 병변의 치유에 대한 실험적 연구

강동희,윤을식,구상환,안덕선,박승하 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

An experimental study was designed to analyze the surface reduction effect of ultrapulse carbon dioxide laser on the skin of guinea pigs receiving laser resurfacing. Two squares of skin measuring 3x3 ㎠ were designed on each side of the abdomen of guinea pigs(n=10). Five animals received laser resurfacing on their abdomen at energy of 250mJ/5 watt, and five other animals received 500 mJ/5 watt. On each animal, the left side square was treated with one pass of a CO2 laser, and the right side q=square was treated with two passes using a C.P.G. scanner. The size of the resurfacing area was determined by celluloid overlays at 1,2,3,4 and 6 weeks. Immediately following laser resurfacing, the area was decreased to 69%(left side) and 56%(right side) of the designed area in the 250 mJ/5 watt group, and 59% and 40% in the 500mJ/5 watt group. After 6 weeks, the resurfaced area had been reduced to 70% and 56% of the designed area in the 250mJ/5 watt group, and 60% and 40% in the 500mJ/5 watt group. As a result, the effect of surface reduction by CO2 laser resurfacing increased at a higher power and when more passes of the ultrapulse carbon dioxide laser were applied. The laser treated skin continued to maintain its contracted dimensions. These findings suggest that ultrapulse carbon dioxide laser may be an effective treatment method for rhytides. Another experiment was performed on multiple punch-out lesions on guinea pig skin(n=2) with 1,2,3 mm collimated hand pieces for the purpose of determining a new laser treatment method. After 4 weeks, on gross and histological examination, there were no differences in the healing of multiple punch-out lesions and the healing of punch-out lesions was complete without any scarring. These findings suggest that the laser punch-out method can be used for the treatment of acne scars.

본태성 고혈압쥐에서 Myogenic Tone의 변화:RhoA 단백질 및 Protein Kinase C의 역할

서정필,류성경,강나영,안덕선,이영호 대한순환기학회 2002 Korean Circulation Journal Vol.32 No.3

Mechanism of Low K^(+)-induced Depolarization in Mammalian Cardiac Muscle

Ahn, Duck Sun,Lee, Syng lll,Kang, Doo Hee Yonsei University, College of Medicine 1987 Yonsei medical journal Vol.28 No.3

Healthcare Development Plan: Balancing Accessibility and Human Resources in Korea

Duck Sun Ahn Ewha Womans University School of Medicine 2023 EMJ (Ewha medical journal) Vol.46 No.4

Enhanced Stretch-Induced Myogenic Tone in the Basilar Artery of Spontaneously Hypertensive Rats

Ahn, Duck-Sun,Choi, Soo-Kyoung,Kim, Young-Hwan,Cho, Young-Eun,Shin, Heung Mook,Morgan, Kathleen G.,Lee, Young-Ho S. Karger 2007 Journal of vascular research Vol.44 No.3

<P>We investigated if the magnitude of myogenic tone in the basilar artery of SHR differs from that in WKY and, if so, whether RhoA- or PKC-dependent mechanisms were involved. Myogenic tone was developed in response to stretch. Stretch-induced myogenic contraction was significantly greater in the SHR than WKY in the presence of external Ca<SUP>2+</SUP>. However, in the absence of external Ca<SUP>2+</SUP>, stretch did not evoke a myogenic tone. The [Ca<SUP>2+</SUP>]<SUB>i</SUB>-induced contraction was larger in SHR than WKY and the [Ca<SUP>2+</SUP>]<SUB>i</SUB>-force curve was significantly shifted to the left in SHR compared to WKY. Y-27632 significantly inhibited stretch-induced myogenic tone, but the inhibitory effect was larger in the SHR than WKY. However, PKC inhibitors had no significant effect on the myogenic tone. RhoA and PKCε were expressed at higher levels in the SHR compared to the WKY. RhoA and PKCα translocated from the cytosol to the cell membrane in response to stretch in both animals, but PKCε was translocated only in SHR. Our results strongly suggest that stretch-induced myogenic tone is enhanced in SHR, and the activation of RhoA/Rho kinase plays an important role in the enhanced myogenic tone in SHR.</P><P>Copyright © 2007 S. Karger AG, Basel</P>

TISSUE EXPANSION IN TRUNK AND EXTREMITIES

Ahn, Duck Sun 최신의학사 1990 最新醫學 Vol.33 No.5

Activation of Ca^(2+)-activated K^(+) channels by beta agonist in rabbit coronary smooth muscle cells

Ahn, Duck-Sun,Jeong, Young-Ki,Lee, Young-Ho,Kang, Bok-Soon Yonsei University, College of Medicine 1995 Yonsei medical journal Vol.36 No.3