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피부 및 폐 결절을 보인 Coccidioidomycosis 1예
박동재,장윤환,이석종,나건연,김도원,김신우 대한의진균학회 2004 대한의진균학회지 Vol.9 No.3
Coccidioidomycosis is a systemic infection caused by inhalation of airborne spores of Coccidioides immitis, a fungus found in soil in the southwestern area of United States and in parts of Mexico and South America. Although its human infection has not been reported infrequently in nonendemic areas, it has rarely been done in Korea since first report of a case of systemic coccidioidomycosis with cutaneous lesions. The patient was a 32-year-old male with granulating cutaneous nodules on left side of upper back for 1 month. Three months ago, he had stayed at northern area of Mexico for 2 months with mild transient upper respiratory symptoms during his stay. After he returned to Korea, cervical lymphadenopathy and skin lesions developed. He had also respiratory symptoms such as chest discomfort and mild chest pain and chest X-ray revealed a solitary nodule. The cutaneous nodules of walnut size were removed surgically and he was recieved daily oral medication of itraconazole 400 mg for 10 months showing good clinical response. Even though lung nodule was not disappeared in radiological exam, repeated CT guided biopsy and fungal tissue culture of lung nodule were undertaken with no growth throughout 10 months. After 10 months itraconazole therapy, there was no evidence of clinical relapse and no change on chest film for following 16 months. We report a case of disseminated coccidioidomycosis involving lung, skin and lymph node simmultaneously and successfully treated with both surgical excision and systemic antifungal therapy.
불화물계 용융염을 이용한 지르코늄 스크랩의 다중전극 전해정련 거동
박동재,김승현,박경태,문종한,이혁희,이종현 한국방사성폐기물학회 2015 방사성폐기물학회지 Vol.13 No.1
원자력발전소 증설에 따라 핵연료 피복관의 생산량이 증가 할 것으로 예상되며, 튜브 제조 시 발생되는 지르코늄(Zr) 스크랩역시 증가 할 것으로 판단된다. 지르코늄(Zr) 정련기 대용량화와 회수율 향상을 위한 사전 연구로서 LiF-KF-ZrF4 불화물의 염에서 다전극을 이용하여 전해정련실험을 실시하였다. LiF-KF-ZrF4염에서는 -0.8 V(vs.Ni)에서 환원전위가 관찰되었으며, 분극 거동 관찰 결과 전극의 개수가 증가할수록 셀의 저항이 낮아져 인가전류량이 증가하였다. 6개의 다 전극을 이용하여 정련 실험을 한 결과 가장 낮은 전류밀도인 25.64 ㎃/㎠조건에서 98%의 회수율로 가장 높은 회수율은 보였다. XRD 및 TG 분석 결과 순수한 Zr이 회수되었으며, ICP 분석결과 양극재의 기본 불순물 함량을 포함한 순도 97.8% 보다 낮은 불순물의 함량을 포함한 순도 99.92%의 Zr을 나타내었다. 폭 20 mm 높이 65 mm의 전극 6개를 사용시 전력소모율은 7.15 kWh/Kg으로 크롤 공정대비 39.7% 전력을 소모하게 된다. 다 전극 사용 시 단일 전극 사용에 비해 인가전류와 셀 효율 및 회수율 증대로 대용량화를 위한 효율적인 기술로 판단된다. The production of nuclear fuel cladding tube is expected to increase with the nuclear power plant expansion. Zirconium(Zr)scrap that is generated during manufacturing is also expected to increase. Zr electrorefining experiment was carried out inthe fluoride salt of LiF-KF-ZrF4 using multiple electrode for scale up and improving throughput Zr electrorefiner development. The Zr reduction peak observed at -0.8 V(vs.Ni). Polarization behavior showed that the amount of applied currentincreases because of decreasing cell resistance as the number of cathode increases. Experimental results showed the highestrecovery rate about 98% at lowest current density of 25.64 mA/cm2 using 6 electrodes. XRD and TG analysis result showthat pure Zr was recovered 99.92% and ICP analysis shows that lower impurity content than conventional impurity contentof the Anode(97.8%). Electrorefining consumes energy about 7.15 kWh/kg less than 39.7% compared to the Kroll processusing 6 electrode width of 20 mm and height of 65 mm. Because of increasing cell efficiency and recovery rate, using multiplecathode is determined as an efficient technique for scale up electrorefining Zr scrap.
박동재,이유진,우명진,정재욱,하윤석,김현태,김태환,유은상,김법완,권태균 대한비뇨의학회 2016 Investigative and Clinical Urology Vol.57 No.4
Purpose: The aim of this study was to assess the advantages of robotic surgery, comparing perioperative and oncological outcomes between robot-assisted radical cystectomy (RARC) and open radical cystectomy (ORC). Materials and Methods: Between August 2008 and May 2014, 112 radical cystectomies (42 RARCs and 70 ORCs) were performed at a single academic institution following Institutional Review Board approval. Patient demographics, perioperative variables (e.g., complications), and oncologic outcomes including metastasis-free survival (MFS), cancer-specific survival (CSS), and overall survival (OS) were reported using the Kaplan-Meier analyses. Results: The median follow-up period was 40 months (range, 0–70 months) vs. 42 months (range, 0–74 months) in RARC and ORC, respectively. Baseline characteristics of both groups were balanced. Blood loss (median, [range]; 300 mL [125–925 mL] vs. 598 mL [150–2,000 mL], p=0.001) and perioperative transfusion rates (23.8% vs. 45.7%, p=0.020) were significantly lower in the RARC group than in the ORC group. The overall complication rates were greater in the ORC group, but this was not statistically significant (65.7% vs. 64.3%, p=0.878). However, there were significantly higher major complication rates in the ORC group (45.7% vs. 26.2%, p=0.040). No significant differences were found with regards to MFS, CSS, and OS. Conclusions: While histopathological findings, overall complications, and survival rates do not reveal definite differences, RARC has more advantages compared to ORC in terms of estimated blood loss, perioperative transfusion rates and fewer perioperative major complications. We propose that RARC is a safer treatment modality with equivalent oncological outcomes compared to ORC.
면도절제술 후 귀걸이 압박요법으로 자가 치료한 귓불 켈로이드 4예
박동재 ( Dong Jae Park ),차영창 ( Young Chang Cha ),이석종 ( Seok Jong Lee ),나건연 ( Gun Yoen Na ),김도원 ( Do Won Kim ),정상립 ( Sang Lip Chung ) 대한피부과학회 2002 대한피부과학회지 Vol.40 No.11
Keloid is a benign proliferative growth of dermal collagen which extends beyond the original wound. Although there are several available methods of treatment including intralesional corticosteroid injection, cryotherapy, surgical excision, laser therapy, pressure, radiotherapy, interferon-α injection and so on, no effective modality to prevent the recurrence of keloids may be present. We have done shaving excision of keloids on the earlobes of 4 patients and then recommended earring made to order for home compression over 4∼5 months therapy with no recurrence for 1∼3 years. It is suggested that compression therapy with earring following shaving excision may be proven to be not only a simple but effective method for prevention of recurrence after removal of keloid on the earlobe.
Arthroscopic Shaver를 이용한 지방종의 수술적 치료
박동재 ( Park Dong Jae ),박지영 ( Park Ji Yeong ),이석종 ( Lee Seog Jong ),나건연 ( Na Geon Yeon ),김도원 ( Kim Do Won ),정상립 ( Jeong Sang Lib ) 대한피부과학회 2003 대한피부과학회지 Vol.41 No.10
Lipoma is one of the most common benign tumors of soft tissue which tends to be left untreated due to unremarkable clinical features and its property of slow growth. It comes to clinical attention only when it causes concern of malignancy because of inordinate size or is perceived as faults in need of cosmetic removal and consequently the incision line is, frequently long and may result in high risk of intra- and postoperative complications such as hematoma and hypertropic scars. So it requires cosmetically acceptable and convenient methods for treatment of lipoma, especially located in the exposed area. The liposuction was tried to get less complications and smaller incision line. But for deep seated variants of lipoma they tend to be less well-circumscribed and often have thick fibrous septa around the lipoma, simple liposuction showed some limitations. So we tried the new liposuction method using arthroscopic shaver for 5 patients having lipomas larger than 5 cm in diameter. The surgery was performed with arthroscopic shaver system equipped with a motorized blade rotating in the suction cannula and emulsifying the lipoma tissue for easy aspiration. The aspirated material was collected and examined histopathologically to rule out the evidence of malignancy. Lipomas were removed completely without any remarkable complications, and no recurrence was seen till three years after surgery. The new method was easier to operate and took less operation time and left only small incision line.(Korean J Dermaton 2003;41(10) : 1347~1350)