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관상동맥 시술 도중 발생한 좌주간부 관상동맥 박리에 대한 스텐트 삽입 치료의 단장기 임상 결과 : acute and long-term results
이세환,이승환,홍명기,김영학,이철환,한기훈,송종민,강덕현,송재관,김재중,박성욱,박승정 대한내과학회 2004 대한내과학회지 Vol.66 No.6
목적 : 심도자 사용 시술과 관련된 좌주간부 관상동맥박리에 대한 적절한 치료는 아직 확실히 정립되지 않은 상태이다. 이에 본 연구는 좌주간부 관상동맥 박리에 대한 스텐트 삽입술의 단장기 임상결과를 후향적으로 분석하였다. 방법 : 좌주간부 관상동맥 박리에 대한 치료로 즉각적인 스텐트 삽입술을 시행하는 것이 안전하고 효과적인 방법임을 가설하였고, 이러한 즉각적인 스텐트 삽입을 시행한 10명의 환자를 대상으로 단장기적 임상경과를 의무기록 고찰과 전화 면담을 통해서 평가하였다. 결과 : 전체 환자 모두 처음부터 좌주간부 관상동맥에 유의한 협착을 가진 환자는 없었으며, 8명의 환자는 심도자의 조작으로 인한 박리가 발생한 경우였고(진단적 혈관 조영술 중에 3명, 유도 도자 조작 중에 5명), 나머지 2명은 다른 병변에 스텐트 삽입시술을 하는 중에 박리가 발생하였다. 이 10명의 환자에서 모두 즉각적인 스텐트 삽입술이 시행되었고, 4명의 환자에서 시술 도중 혈압 저하로 Intra-aortic Ballon Pump (IABP)를 장착하였다. 모든 환자에서 성공적으로 스텐트가 삽입되었고, 병원내 사망은 1명도 없었다. 6개월 추적 관상동맥 조영술은 8명의 환자에서 시행되었다. 혈관 조영상의 재협착(직경 협착 50% 이상)은 8명 모두에게서 관찰되지 않았으며, 퇴원 후 평균 31±25개월의 추적관찰 결과 주요 심장사건은 1건도 발생하지 않았다. 결론 : 비록 대상 환자가 적은 연구였지만 좌주간부 관상동맥 박리에 대한 스텐트 삽입술은 기술적으로 안전하고 빠르게 시행 할 수 있으며, 훌륭한 단장기적인 치료 효과를 보여준다. Background : The optimal treatment of patients with left main coronary artery (LMCA) dissection during catheter-based procedure remains uncertain. We retrospectively analyzed the acute and long-term results of bail-out stenting for LMCA dissection. Methods : In cases with significant LMCA dissection occurring during catheter-based procedure, prompt stent implantation may be safe and associated with favorable clinical outcome. We evaluated the acute and long-term results of bail-out stenting for LMCA dissection occurring during catheter-bases procedure in 1- patients. Results : Initially, there was significant stenosis of LMCA segment in these patients. Catheter-induced dissection occurred in 8 patients (during diagnostic angiography in 3 patients and guiding catheter manipulation in 5 patients). Two patients suffered dissection in the setting of stent deployment in other vessels. Therefore, bail-out stenting LMCA dissection was performed in a total of 10 patients. In 4 patients, hypotension developed and intra-aortic balloon pump was placed during procedure. Stents were successfully deployed in all patients. There was no in-hospital mortality. Six-month angiographic follow-up was performed in 8 patients. Angiographic restenosis(diameter stenosis 50%) was not observed in all patients at follow-up study. During a mean follow-up of 31±25 months after hospital discharge, there was no major adverse cardiac event (death, myocardial infarction, and target lesion revascularization). Conclusion : Bail-out LMCA stenting is technically feasible, and showed good acute and long-term results in a small series of patients.
Study on Robust Lateral Controller for Differential GPS-Based Autonomous Vehicles
Park, Hyung-Gyu,Ahn, Kyoung-Kwan,Park, Myeong-Kwan,Lee, Seok-Hee Korean Society for Precision Engineering 2018 International Journal of Precision Engineering and Vol.19 No.3
Recently, technological advancements in autonomous vehicle development have continued to accelerate. In this paper, we propose a lateral controller and navigation algorithm for autonomous vehicles based on the Differential Global Positioning System (DGPS), core technology of autonomous vehicles. In this study, an H-infinity (<TEX>$H_{\infty}$</TEX>) controller was designed lateral controller to ensure nominal safety and robustness against noise, external disturbances and structural and non-structural errors in vehicle modeling. Meanwhile, the 'pure pursuit' approach which geometrically follows a path was employed as a path-tracking technique for the proposed navigation algorithm. A vehicle modeling simulation was conducted to evaluate the performance of the proposed method using a two-degrees-of-freedom linear model. The lateral <TEX>$H_{\infty}$</TEX> controller and navigation algorithm were applied to an actual vehicle, Their performances were evaluated by comparing the path tracking error at various speeds of autonomous vehicles with that of the proportional-integral-derivative (PID) controller.
( Myeong Jin Park ),( Dae Kwan Yun ),( Uri Shon ),( Gi Hyun Sung ),( Byung Cheol Park ),( Myung Hwa Kim ),( Seung Phil Hong ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1
Acroangiodermatitis is a reactive angiodysplasia of cutaneous blood vessels. It has been described in patients with increased venous pressure and stasis caused by venous insufficiency, congenital/acquired arteriovenous anomalies, arteriovenous shunts and lower limb paralysis or amputation stumps. Its differential diagnosis with Kaposi sarcoma is important. They resemble each other both clinically and histopathologically. Treatment of acroangiodermatitis is important to prevent further complications such as soft tissue destruction and infection A 41-year-old male presented with hyperkeratotic scaly patch and erythema with multiple black colored papules with easily bleeding. The lesion had been presented for several years. He was diagnosed with quadriplegia due to C5 fracture. Skin biopsy was done and showed vessel proliferation and perivascular lymphocyte and neutrophil infiltration in the papillary dermis. Extravasated erythrocytes and hemosiderin are present within the dermis, in the absence of HHV-8 on immunostaining. The patient was given a diagnosis of stasis dermatitis with acroangiodermatitis. For treatment, topical steroid ointment and emollient were applied and compression therapy was done to reduce venous stasis. He took antibiotics to prevent secondary bacterial infection. Herein, we report a case of stasis dermatitis with acroangiodermatitis mimicking Kaposi sarcoma in a quadriplegia patient.