• 제목/요약/키워드: 정철(鄭澈)

검색결과 228건 처리시간 0.033초

액와동맥-양측대퇴동맥우회술후 발생한 인조혈관 감염의 치료 (Management of Infected Axillo-bifemoral Graft; A Case Report)

  • 정철하
    • Journal of Chest Surgery
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    • 제26권7호
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    • pp.552-556
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    • 1993
  • Infection after reconstructive surgery is one of the most catastrophic postoperative complication in vascular surgery. Mortality rates reported from a world-wide experience range between 25 and 88 percent. The surgeon faced with such a complication must choose among many diagnostic and management options to maximize limb salvage and survival based on the presentation and site of the infectiota the degree of ischemia of the lower extremities, and the overall medical condition of the patient. We successfully managed with descending thoracic aorta-to-bifemoral arteries bypass after the entire removal of the infected axillo-bifemoral graft because of bypass graft infection.

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Empirical Horizontal-Branch Loci of Galactic Globular Clusters in the Sloan Digital Sky Survey

  • 유혜인;안덕근;정철
    • 천문학회보
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    • 제37권2호
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    • pp.147.1-147.1
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    • 2012
  • We present empirical fiducial sequences for horizontal-branch (HB) stars in a set of bright Galactic globular clusters previously observed in SDSS (An et al. 2008). Mean loci of HB stars are derived on color-magnitude diagrams with multiple color indices (u - g, g - r, g - i, and g - z ) in order to identify foreground/background objects as well as cluster RR Lyrae variables. We compare our fiducial sequences to the model predictions from Yonsei-Yale isochrones and test the accuracy of the stellar evolution models.

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Teflon felt를 이용한 Bentall 술식 치험 5례 (Bentall's Operation -5 Case Report-)

  • 정철하
    • Journal of Chest Surgery
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    • 제27권2호
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    • pp.153-156
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    • 1994
  • Bentall`s operation for repair of annuloaortic ectasia has been associated with postoperative bleeding and with false aneurysm of the anastomotic site between the coronary orifice and composite graft.Among 5 cases, 2 cases have been operated direct anastomosis between coronary artery and vascular graft.Remained 3 cases have been operated with doughnutlike Teflon felt buttress.The technique of sandwiching the freed button of aortic wall bearing the coronary artery ostium between an outer Teflon felt doughnutlike buttress and the inner composite graft provides a leak-proof anastomosis.We experienced one case reoperation for bleeding at coronary anastomotic site above method.

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고효율 사출성형기의 에너지 절감 및 성형 재현성 연구 (A Study on the Energy Saving and the Reproducibility of highly-efficient Injection Molding Machine)

  • 정철;김종선;안희정;윤경환;황철진
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2008년도 추계학술대회 논문집
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    • pp.418-421
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    • 2008
  • Because of steep rise of international energy cost in recent years high efficiency has been emphasized in energy policy. As far as injection molding machine is concerned, hybrid method using hydraulic and electric systems became the key to this energy saving. the energy saving and molding reproducibility of hybrid injection molding process were shown experimentally, power consumption of hybrid machine is 38% as compared with that of hydraulic machine. Furthermore, the molding reproducibility showed between two methods.

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