• Journal of Chest Surgery
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• 제46권5호
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• pp.383-387
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• 2013

Vacuum-assisted closure therapy is an alternative method for a massive subcutaneous emphysema treatment. It is easily applicable and shows rapid effectiveness in massive subcutaneous emphysema, intractable with chest tube drainage.

• Archives of Plastic Surgery
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• 제38권1호
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• pp.121-126
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• 2011

Purpose: Vaccum-assisted closure (VAC) has rapidly evolved into a widely accepted treatment of contaminated wounds, envenomations, infiltrations, and wound complications. This results in a sealed, moist environment where tissue is given the opportunity to survive as edema is removed and perfusion is increased. Many plastic surgeons now place a VAC device directly over the fasciotomy site at the time of the initial procedure. Large amounts of the fluid are withdrawn, and fasciotomies can be closed primarily sooner. This study was designed to observe the effect of VAC in preventing complications in snake bitten hands. Methods: In our study of three cases of snake bite, three of them underwent the VAC treatment & fasciotomy of the wound in the hand. This cases, the posterior compartment of the hand was bitten for a few days, releasing incisions were made of the posterior hand and 125 mmHg of continuous vacuum was applied to fasciomy incision site and the biting wound. The dressings were changed three times per week. Results: Our study examining the effects of applied vacuum in preventing snake bite wounds showed that the incidence of tissue necrosis and compartment syndrome was significantly lower for vacuum-treated wounds than for conservative wounds. Serum myoglobin, CK-MB, and CPK levels measured after fasciotomy incision were significantly decreased. We obtained satisfactory results from early dorsal fasciotomy, drainage of the edema with the VAC system, and then primary closure. The postoperative course was uneventful. Conclusion: Envenomation is a term implying that sufficient venom has been introduced into the body to cause either local signs at the site of the bite and/or systemic signs. Use of the vacuum-assisted closure device in snake bite can result in a decreased rate of tissue necrosis, lymphatic fluid collection, hemolytic fluid collection, and edema. Early fasciotomy of the dorsal hand and VAC apply is the alternative treatment of the snake bite.

• Archives of Plastic Surgery
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• 제36권3호
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• pp.351-355
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• 2009

Purpose: Cervical necrotizing fasciitis tends to involve the deep soft tissues and spread caudally to the anterior chest and mediastinum, often resulting in major complications and death. It may rapidly spread into the thorax along fascial planes, and the associated diagnostic delay results in this descending necrotizing mediastinitis. So, aggressive multidisciplinary therapy with surgical drainage is mandatory. We present a very rare case of descending necrotizing mediastinitis with literature review. Methods: A 53 years old male visited our department 7 days after trauma in neck. His premorbid conditions and risk factors of necrotizing fasciitis were concealed hepatoma, trauma history, chronic liver disease, and nutrition deficit. Computed tomographic scans of the head and neck region were performed in this patient : signs of necrotizing fasciitis, were seen in the platysma, sternocleidomastoid, trapezius muscle and strap muscles of the neck. Fluid accumulations involved multiple neck spaces and mediastinum. At the time, he diagnosed as necrotizing fasciitis on his neck and anterior chest. Necrotic wound was excised serially and we treated this with the Vacuum - assisted closure(VAC, Kinetics Concepts International, San Antonio, Texas) system device. After appropriately shaping the sponge and achieving additional 3 pieces drainage tubes in the pockets, continuous negative pressure of 125 mmHg was applied. The VAC therapy was utilized for a period of 12 days. Results: We obtained satisfactory results from wide excision, abscess drainage with the VAC system, and then split thickness skin graft. The postoperative course was uneventful. Conclusion: The refined technique using the VAC system can provide a means of simple and effective management for the descending necrotizing mediastinitis, with better cosmetic and functional results. Finally, the VAC system has been adopted as the standard treatment for deep cervical and mediastinal wound infections as a result of the excellent clinical outcome.

• 한국산학기술학회논문지
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• 제19권1호
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• pp.121-126
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• 2018

중환자실에 입원한 환자들의 구강위생은 매우 중요한 문제이다. 중환자들은 기본적으로 면역이 저하된 환자들로 각종 병원성 세균들에 의한 감염의 기회가 높기 때문이다. 구강문제는 감염의 1차 방어선인 구강이 감염의 우선적인 부위로 작용될 뿐 아니라 전신감염을 초래하기도 한다. 본 연구에서는 중증환자의 구강청소를 용이하게 하는 마우스 피스 형태의 새로운 진공 구강 세정기 설계에 관한 연구를 수행하였다. 이중 구조 방식의 세정기와 표준 치아 모델로써 3D CAD 모델링 및 유동해석 모델을 수립하고 압력 및 유동특성을 분석하였다. 세정기 내부의 압력은 거의 일정한 분포를 보였으나, 속력분포의 경우 치아 안쪽과 바깥쪽에서 큰 차이를 보였다. 치아 안쪽에서도 가운데 부분의 속도가 가장 높고 가운데에서 멀어질수록 속력이 감소하는 특성을 보였다. 세정기의 흡입관과 배출관을 바꾸어 해석한 결과 치아 바깥쪽 가운데 부분의 속도가 가장 높게 나타났다. 세정기의 효과를 높이기 위해서 흡입-배출을 교대로 바꾸는 교번식을 제안하고, 어금니 부위의 속력을 높이는 설계 보완이 요구된다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.1165-1172
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• 2006

In this study, an aspect of settlement, developed from different ground improvement method like suction drain method using vacuum pressure and vertical drain method using overburden pressure, was compared each other. In order to analyze settlement tendency of each method exactly, the finite element analysis program was used. The analyses of vertical settlement and lateral displacement for suction drain method and vertical drain method were conducted independently during the solving stage. The initial condition of drainage zone was fixed with 25m depth and 21m width. After the program analyses, the settlement condition had a different tendency with the ground improvement method. Especially, in the results of vertical drain method, the disparity of settlement between the middle of improved zone and unimproved zone. In the case of suction drain method, however, the difference of settlement was smaller than that of vertical drain method.

• 한국진공학회:학술대회논문집
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• 한국진공학회 1999년도 제17회 학술발표회 논문개요집
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• pp.160-160
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• 1999

To reduce the fouling of heat exchangers, the plasma polymerized films was coated on the heat exchangers, and an effect of plasma polymerized film on fouling of heat exchangers was investigated. Monomer and reactive gases were used as the precursors of plasma polymerization. Plasma polymerized films were deposited with process parameters of pressure, power, and ratio of gases. Plasma polymerized films could be served as functional layers of good wettability and high resistance to corrosion. Wettability of plasma polymerized film could be controlled by the ratio change gas mixture. Hydrophilicity of plasma polymerized films on heat exchanger in air conditioner can provide improvement in performance of heat exchanger which results from good water drainage, decrease of pressure drop. DC-plasma polymerized films improve resistance to corrosion whcih is related to deposit formation in heat exchangers. The difference in the build up of fouling deposits between bare substrate and plasma polymerized substrate was investigated by scanning electron microscopy (SEM). An effect of plasma polymerized film on fouling of heat exchangers was discussed in terms of surface properties such as wettability, surface chemical state.

• Journal of Chest Surgery
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• 제43권5호
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• pp.562-564
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• 2010

임파루는 대퇴부 절개를 이용한 혈관 수술시 흔히 발생하는 합병증이다. 임파선은 해부학적으로 혈관과 매우 가깝게 위치하기 때문에 혈관 노출 과정에서 드물지 않게 손상된다. 임파액을 적절하게 배액시키지 않으면 환자가 다른 합병증으로 이환되는 원인으로 작용할 수 있으며, 흔히 창상 감염을 야기한다. 이에 대한 다양한 치료법이 보고되었음에도 임파루는 치료하기 어렵고 결국에는 재원기간을 연장 시킨다. 서혜부 절개를 이용한 혈관 수술을 받은 72세 여자환자에게서 수술후 임파루가 발생하였으며 창상에 음압 요법을 시행하였다. 조기에 적절한 배액이 되었고, 창상 치유가 원활하여 창상 봉합이 가능하였기에 재원기간을 단축할 수 있었다.

• 한국지반공학회지:지반
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• 제13권1호
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• pp.137-146
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• 1997

A Study on the 본 연구에서는 플라스틱드레인을 이용하여 진공수평배수에 의해 개량된 준설 점토 지반의 압밀거동을 파악하기 위하여 대형 압밀시험을 실시하였으며, 실험 결과가 포텐결중공원주의 압밀이론을 이용한 수치해석에 의해 비교 검토되었다. 본 연구 실험결과에 의하면 수평배수진공압밀시험은 점토층 내부의 함수비 및 간극수압과 드레인 배수 속도 등이 진공압밀 시간 경과에 따라 감소되어 압밀이 급속하게 진행되고 있음이 확인되었다. 점토층 중공원주의 방사류에 대한 선형포텐샬압밀이론을 이용하여 수치 압밀해석 결과 간극수압은 확산 형태보다 흙의 변형과 투수에 의해 크게 좌우되고 있으므로, 지표면 부근에서의 실측 침하량은 압밀응력증가율 a가 -0.5정도에서 수치해석과 일치하며 또한 드레인 설치 부근에서의 점토층 침하량은 Baryon 압밀이론과 유사한 거동을 나타내고 있다. 최종적으로 수평 배수에 대한 적당한 선택과정을 포함한 설계 및 시공관리가 시험결과에 의하여 설명 되었으며 포텐셜압밀이론은 진공배수시 수평드레인에 의한 압밀거동을 정확하게 예측할 수 있다.

• 펄프종이기술
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• 제48권2호
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• pp.99-105
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• 2016

The increase of wet web solid content after wet press and dry compressive strength were observed in lab study by judicious application of wood flour and starch for the old corrugated container (OCC). Pearl starch was better than cationic starch in strength development, but cationic starch was better for drainage. Application of vacuum on the mixed solution of wood flour and starch helped strength development further without loss of other properties. The effect of wood flour addition on wet web solid content improved as the wet pressing pressure increased. The use of wood flour and starch mixture improved wet web solid contents further.

• Archives of Plastic Surgery
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• 제41권1호
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• pp.81-84
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• 2014

In this article, we present two cases of femoral pseudoaneurysm (PA) at the femoral arterial puncture site followed by necrotizing fasciitis, which is rare but can be fatal when not managed appropriately. PA was revealed by lower-extremity angiography and color-flow Doppler ultrasonography. Hematoma removal, thrombolysis, and bleeder ligation with Gelfoam were repeatedly performed by a vascular surgeon. When necrotizing fasciitis developed, aggressive surgical drainage and creation of a viable wound bed for reconstruction were mandatory. We adopted a vacuum-assisted closure device (Kinetics Concepts International) as the standard treatment for complicated, serious, infected PA of the puncture site. Excellent clinical outcomes were obtained.