Intradural Extramedullary Ependymoma with Spinal Root Attachment: A Case Report

하승만,신동아 대한척추신경외과학회 2012 Neurospine Vol.9 No.3

A 36-year-old female patient presented with shoulder pain experienced over a period of one year and progressive weakness in both legs for one month. A magnetic resonance imaging scan revealed an intradural extramedullary (IDEM) fusiform mass about 9.8 cm in length, heterogeneously enhanced at the level of C6-T4 with spinal cord compression. At the time of surgery,the surgeon found an encapsulated IDEM tumor with spinal root attachment. The tumor was completely resected and the histologic diagnosis revealed ependymoma. The patient showed a favorable outcome with no recurrence at the 6-month follow-up. This paper reports a rare case of intradural extramedullary ependymoma with spinal root attachment.

Minimally Invasive Lumbar Spinal Decompression in Elderly Patients with Magnetic Resonance Imaging Morphological Analysis

하승만,홍영호,이승철 대한척추외과학회 2018 Asian Spine Journal Vol.12 No.2

Study Design: Case-control study. Purpose: In this study, we aimed to investigate clinical outcomes and morphological features in elderly patients with lumbar spinal stenosis (LSS) who were treated by minimally invasive surgery (MIS) unilateral laminectomy for bilateral decompression (ULBD) using a tubular retractor. Overview of Literature: Numerous methods using imaging have been attempted to describe the severity of spinal stenosis. But the relationship between clinical symptoms and radiological features remains debatable. Objective: In this study, we aimed to investigate clinical outcomes and morphological features in elderly patients with LSS who were treated by MIS-ULBD Methods: We methodically assessed 85 consecutive patients aged >65 years who were treated for LSS. The patients were retrospectively analyzed in two age groups: 66–75 years (group 1) and >75 years (group 2). Clinical outcomes were assessed using the Visual Analog Scale (VAS), Oswestry Disability Index (ODI), and the modified MacNab criteria. Outcome parameters were compared between the groups at the 1-year follow-up. Core radiologic parameters for central and lateral stenosis were analyzed and clinical findings of the groups were compared. Results: At the 1-year follow-up, patients in both groups 1 and 2 demonstrated significant improvement in their VAS and ODI scores. All clinical outcomes, except postoperative ODI, were not significantly difference between the groups. In addition, no significant difference was noted in the preoperative radiological parameters between the groups. There was no statistically significant correlation between radiological parameters and clinical symptoms or their outcomes. Moreover, no differences were noted in perioperative adverse events and in the need for repeat surgery at follow-ups between the groups. Conclusions: MIS-ULBD by tubular approach is a safe and effective treatment option for elderly patients with LSS. Clinical outcomes in patients with LSS and aged >75 years were comparable with those in patients with LSS and aged 66–75 years. Moreover, we did not find any correlation between radiological parameters and clinical outcomes in either of the two patient groups.

Kano 모델 기반 금융기관 외환 서비스 개선 요인에 대한 연구

하승인,이인혜 한국인터넷전자상거래학회 2025 인터넷전자상거래연구 Vol.25 No.3

Recently, most financial companies are competitively launching foreign exchange services that combine card products in line with the recovery of overseas travel after the COVID-19 pandemic. Accordingly, this study aims to identify the core quality elements of foreign exchange services in two aspects, currency exchange and remittance, and derive strategic implications to enhance the competitiveness of financial companies. To this end, a survey was conducted on customers using foreign exchange services, and the quality attributes of foreign exchange services were classified and evaluated using the Kano model and Timko methodology. As a result of the analysis, for foreign exchange services in order to increase customer satisfaction, improvements in branch accessibility and preferential exchange rate level are required, and in order to resolve customer dissatisfaction, improvements in additional services such as primary bank, transaction stability and security, ease of digital banking operation, and immediate currency exchange were found to be effective. Meanwhile, for remittance services, in order to increase customer satisfaction, improvements are required for accessibility to branches, ease of digital banking operation, and preferential remittance fee levels, and in order to resolve customer dissatisfaction, improvements are required for speed of business processing, and preferential remittance fee levels.

에탄올이 초임계 이산화탄소를 이용한 폐 페인트 슬러지 처리에 미치는 영향 연구

하승일,박광헌,최창식,신재빈,손효경 한국대기환경학회 2021 한국대기환경학회 학술대회논문집 Vol.2021 No.10

자동차 제조 공정 중 도장공정 내 CWS (circulating water system)에서 수거되는 페인트 슬러지는 폐기물처리 시 많은 비용이 발생한다. 따라서 페인트 슬러지의 부피를 감량하여 처리 비용을 감축할 수 있는 추가적인 처리 공정이 요구된다. 따라서 본 연구에서는 2차 폐기물 발생을 줄일 수 있는 친환경적인 용매로써 초임계 이산화탄소를 이용한 페인트 슬러지 처리실험을 진행하였다. 이산화탄소는 무독성이며 물질에 대한 침투성이 좋아 높은 처리효율을 기대할 수 있으며, 이산화탄소와 같이 상온에서 기체인 유체는 공정 후 감압을 통하여 폐기물과 분리시켜 2차 폐기물 발생문제를 해결할 수 있다. 또한 분리된 이산화탄소를 재사용할 수 있으므로 공정비용 감소 효과도 기대할 수 있다. 본 연구에서는 초임계 이산화탄소를 이용한 처리공정을 통해 페인트 슬러지의 함수율 감소량과 유기물 제거 가능성을 실험하고, 에탄올의 첨가여부에 따른 처리효율 차이를 확인하였다. 실험에 쓰인 샘플은 자동차 제조업체에서 사용되는 페인트 슬러지를 사용하였으며, 페인트 슬러지의 성분 비율에 따라 클리어/ 상도베이스1 / 상도베이스2 총 3종류로 구분하였다. 실험 조건의 경우 샘플 질량을 5 g으로 통일하였고, 샘플이 담긴 반응용기에 이산화탄소를 주입하여 온도 40℃ 조건에서 200 bar로 가압하였다. 이후 평균 3.5mL/min의 유량으로 2시간 동안 이산화탄소를 흘림으로써 실험을 마무리하였다. 추가적으로 실험 조건에 에탄올을 첨가함으로써 에탄올이 처리 효율에 미치는 영향을 확인하였다. 실험 결과 유기물량에 비해 함수율의 감소 효과가 뚜렷하게 나타났으며, 에탄올의 첨가로 인한 수분 추출의 가속화를 확인하였다. 이를 통해 향후 공정 확대가 이루어진다면 이산화탄소 용매 재사용으로 인한 처리 비용 감소와 함께 효율 증대가 이루어질 것으로 기대된다.

Squalene 복용 후 발생한 지방성 폐렴 1례

하승인,이시원,김주훈,양성우,옥철호,장태원,정만홍 대한결핵 및 호흡기학회 2003 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.97 No.0

주거공간 실내이미지에 따른 색채팔레트 개발에 관한 연구

하승아(Ha, Seung-Ah),박영순(Park, Young-Soon) 한국실내디자인학회 2001 한국실내디자인학회논문집 Vol.- No.26

반응표면분석법을 이용한 제올라이트의 다중 중금속 흡착인자 최적화

하승한(Seunghan Ha),송진수(Jinsu Song),안종화(Johnghwa Ahn) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

내시경적 역행성 담관조영술 중에 발생한 식도천공에 의한 기흉 1예

하승인,김신,김유리,박찬복,이지현,윤병철,한병훈,이상욱,신동훈 고신대학교 의학부 2004 高神大學校 醫學部 論文集 Vol.19 No.1

Esophageal perforation is an extremely lethal injury that requires careful management for survival. Currently, the most common cause of the perforation is iatrogenic injury, and the incidence of esophageal perforation has increased as the use of endoscopic procedure has become more frequent. Perforation during endoscopic retrograde cholangiogram (ERC) are rare. Bile duct or duodenal perforation caused by therapeutic procedures such as endoscopic sphincterotomy, guide-wire, and biliary stent were frequently reported. However, the case of esophageal perforation developed during diagnostic ERC was very rare and there has not report in Korea yet. A 61-year-old man was admitted for the evaluation of upper abdominal pain. He suspected bile duct dilatation and common bile duct stone by ultrasongraphy. During the diagnostic ERC, endoscopy showed structure of pleural cavity. We suspected esophageal perforation, and then checked esophagogram, neck and chest CT. The CT showed right side pneumothorax and left parapharyngeal and retropharyngeal air shadow. We diagnosed esophageal perforation accompanied with pneumothorax. He was successfully treated with medical treatment for 10 days.

Gillies 씨 방법으로 정복된 독립 관골궁 골절의 장기 추적관찰

하승일,김준범,최재구,안덕균 大韓成形外科學會 1998 Archives of Plastic Surgery Vol.25 No.1

Many methods have been developed for the reduction of the isolated zygomatic arch fracture. Even though the reduction of isolated zygomatic arch fracture can be made well according to the various methods, the Gillies' method has been selected as the 1st choice. But long term follow-up study of this method was not reported. So long term follow up of zygomatic arch fracture was performed in 35 patients who were treated by Gillies' method. Authors divided isolated zygomatic arch fractures into three classes (Type A : a simple fracture with one fracture line and one greenstick fracture, TyPe B : medially depressed fracture with three fracture lines, Type C : a medially depressed fracture segment with two fracture lines) and followed up the reduced isolated zygomatic arch fracture cases using Gillies' method by radiographes and interview. The depression of lesion site was estimated by comparing with tracing the zygomatic arch shadow of normal side. The results were as follows: 1. The mean follow up time was 33.4 month. 2. The isolated zygomatic fractures were classified by three group. A: a simple fracture (16 cases) B: the central fracture point was a medially depressed fracture (14 cases) C: fracture with a medially depressed segment (5 cases) 3. The mean depression of lesion site was 2.3 mm. (Type A: 2.0 mm, Type B: 3.2 mm, Type C: 2.4 mm and difference between A and B was significant statistically (p < 0.037)). 4. The mean depression of zygomatic arch fracture was 2.1 mm in excellent group, 2.4 mm in good group and 5.2 mm in poor group and difference between excellent and poor, and between good and poor group were statistically significant (p < 0.0001). 5. On result of subjective satisfaction, number of excellent case was 17(48.6%), it of good case was 15(42.9%) and it of poor case was 3(8.6%) (Type A: 9, 7, 0, Type B: 5, 7, 2 and Type C: 3, 1, 1 excellent, good and poor in sequence). 6. The mean depression of overcorrection group(17, 8, 1 excellent good and poor in sequence) and nonovercorrection group(2, 5 and 2 in excellent, good and poor in sequence) was 2.26 and 3.6 mm in each other(p < 0.004). After reviewing all of results, it is concluded that Gillies' method is acceptable as the 1st choice for the reduction method of an isolated zygomatic arch.

대화 말뭉치 구축을 위한 웹 크롤러 기반 대화 수집기

하승도(Seungdo Ha),선동성(Dong Seong Seon),이해준(Haejun Lee),이상구(Sang-goo Lee) 한국정보과학회 2016 한국정보과학회 학술발표논문집 Vol.2016 No.6