• Title/Summary/Keyword: 박리성

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Study on the Peel off Style Low Viscosity Epoxy and Separation Media for a Moving Historic Sites (유구 이전 전용 저점도형 에폭시와 박리제에 관한 연구)

  • Han, Won-Sik;Hong, Tae-Kee;Park, Gi-Jung;Lim, Sung-Jin;Wi, Koang-Chul
    • Journal of Conservation Science
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    • v.24
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    • pp.37-42
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    • 2008

  • Stability of the moving historic sites have something to do with the degree of easiness of work as well as physical property of polymer product. These agents should be able to use without the effect of outer environments like water or low temperature and must have stability during progress of working the peel off Urethane pre-product from Epoxy surface. So, we synthesized low viscosity epoxy resin and hardener with best physical quality and separation media for the moving of historical sites. These products have very good tension strength, adhesion strength, low viscosity and various physical properties that the users want. Particularly, separation media products have good separation of Urethane pre-products surface and Epoxy final product surface.

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A Case Report of Pontine Infarction as an Initial Manifestation of Systemic Lupus Erythematosus: Diagnostic Clues from MRI and Digital Subtraction Angiography (전신성 홍반성 루푸스의 초기 증상으로 나타난 교뇌경색의 증례 보고: 자기공명영상 및 디지털감산 혈관조영술에서의 진단 단서)

  • Mi Sun Chung;Jun Soo Byun;Younghee Yim
    • Journal of the Korean Society of Radiology
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    • v.82 no.5
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    • pp.1281-1286
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    • 2021

  • Brainstem infarction due to vertebrobasilar insufficiency is a rare initial presentation of systemic lupus erythematosus (SLE) patients and small-vessel dissection as the direct cause of infarction has not been reported. We report the case of a 20-year-old female with acute infarction on the right side of the pons due to a small artery (pontine perforator) dissection, identified on digital subtraction angiography and high-resolution vessel wall MRI (vwMRI). She was diagnosed with SLE based on the presence of neurologic disorders and relevant laboratory findings. The pontine perforator-dissecting aneurysm had occluded and the right distal vertebral artery had resolved on subsequent vwMRI. She had a modified Rankin Scale (mRS) score of 1 at discharge with mild symptom improvement, and exhibited no further aggravation of symptoms at 3 or 12 months, maintaining an mRS score of 1.

  • https://doi.org/10.3348/jksr.2021.0039 인용 PDF

Redo Opeations for Recurrent Dissection After Operation for Type A Aortic Dissection (A형 대동맥 박리 수술 후 재발성 박리의 재수술)

  • 홍유선;강정한;윤치순;이현성;박형동
    • Journal of Chest Surgery
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    • v.34 no.8
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    • pp.604-610
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    • 2001

  • Stanford type A aortic dissection after graft replacement of ascending aorta and/or aortic arch required careful follow-up due to progression of the enlarged false lumen or the recurrence of dissection. From June 1984 to June 200, 124 patients underwent operations for type A aortic dissection. Among them, 6 patients underwent reoperation due to recurred aneurysm or dissection. We evaluated that the causes of reoperation, including Marfan syndrome, the approach and result of reoperation, and strategy to reduce the risk of reoperation. Material and method: The first operation was done on acute stage in 4 cases, and chronic stage in 2 cases. There were Marfan syndromes in 3 cases. The entry site was the ascending aorta for all cases except one who underwent Bentall operation(n=3) or ascending aorta graft replacement(n=2). In one case, Bentall operation and total arch replacement was performed due to chronic type A dissection with multiple fenestrations. Mean interval of reoperation was 67.6months(range 5 months to 14 year 4months) after the first operation. Reoperations were performed with recurrence of dissection(n=4), threatening aneurysmal evolution of persisting dissection(n=1), and false aneurysm with infection(n=1). The redo operation involved the hemiarch in 1 case, distal ascending to total arch and descending thoracic aorta in 4 cases, and only descending thoracic aorta in 1 case. Result: There were Marfan syndromes in 18 patients. The mean age in type A dissection was 56.7 years and that in the first operation of reoperationc ases was 32.2 years. Especially in 3 patients with Marfan syndrome, the mean age was 29 years.

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