• Journal of Chest Surgery
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• 제31권12호
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• pp.1234-1237
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• 1998

Marfan 증후군과 같은 대동맥 질환의 경우 대동맥동 및 대동맥륜의 점진적인 확장 및 변형이 발생하여 대동맥판막의 폐쇄부전을 초래한다. 이런 경우 대부분 상행대동맥과 대동맥 판막을 composite graft의 형태로 치환하고 여기에 관상동맥을 문합하는 술식이 적용되어왔다. 본 증례는 Marfan 증후군이 동반된 22세 남자 환자로 대동맥 근부 확장과 승모판막 부전이 있었다. 수술은 대동맥 판막 및 좌심실유출로의 일부를 보존하면서 상행대동맥 및 Valsalva동의 동맥류를 제거하고, 대동맥 판막 및 관상동맥을 인조혈관에 다시 문합하는 술식을 적용하였다. 술후 심초음파 검사상 대동맥 판막의 기능은 정상이었다. 대동맥륜 확장증에 있어서 대동맥 판막이 정상적인 해부학적 구조를 가진다면 이상의 술식을 적용함으로써 자신의 대동맥 판막은 보존하면서 대동맥 근부를 치환할 수 있으리라 생각된다.

• Archives of Plastic Surgery
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• 제36권6호
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• pp.788-791
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• 2009

Purpose: Reconstruction of full - thickness defects of the nasal ala has always been a challenge. Local flaps can be used easily, and good result can be achieved when it is indicated. But local flaps often result in facial scars and bulky ala that require secondary revisions. Composite auricular chondrocutaneous graft may matches nasal alae well in terms of contour, color and texture, however, the size of composite graft is limited. We performed free vascularized helical root flaps for reconstruction of nasal ala. Methods: Bilateral ala were excised and the defects were reconstructed with a chondrocutaneous free helical root flap. Each side of ala was reconstructed in 3 months interval. Superficial temporal vessels of vascularized helical root flap were anastomosed to facial vessels. Great saphenous vein was used for interpositional vascular graft. Results: Flaps were survived successfully. The contour, texture and color match were satisfactory. Functional problem of nasal obstruction caused by scar stenosis of nostrils was also resolved. Conclusion: The free vascularized helical root flap is a reliable method in reconstruction of nasal alar defects. The donor deformity was minimal.

• 한국염색가공학회지
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• 제9권4호
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• pp.47-53
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• 1997

To improve the interfacial bonding of carbon fiber-nylon 6 composite, carbon fiber(CF) were oxidized by nitric acid treatment, and two types of graft polymer(GP) of nylon 6-g-polyacrylamide (PAAm) -water dispersable GP(WDGP) and m-cresol solu ble GP(CSGP) were treated as coupling agents. Introduction of polar groups such as -COOH, -OH, etc, on the surface of the oxidized CF was confirmed by IR spectra. The stem polymer of nylon 6 in the coupling agent (GP) could be compatible with'matrix nylon 5, and the grafted branch of PAAm on GP could react to the polar groups on the oxidized CF in composite. The interfacial strength was measured by the transverse tensile test to the fiber direction for single CF embedded nylon 6 film especially prepared and by the pull-out test method. The interfacial strength of the composite reinforced with oxidized CF is greater than that reinforced with unoxidized CF. The interfacial strength of the composite was increased by treatment of coupling agents(GPs) considerably, and the increasing tendency by the WDGP is greater than that by the CSGP. The optimum conditions of coupling agent treatment are as follows: the concentration, adsorption tlme of GP, and curing temperature are 2%, 20 minutes, and $170^{\circ}$, respectively.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1983년도 제17차 학술대회연제순서 및 초록
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• pp.14.3-14
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• 1983

최근 급속히 증가 추세에 있는 각종 산업재해와 교통사고로 인한 심한 신체적 손상, 심혈관계수술 및 호흡계수술등을 받은 환자에서 기도유지를 위해 사용되는 기관내삽관과 기관절개위의 후유증 또는 두부외상으로 발생하는 외상성 기관협착의 빈도가 점차 높아짐에 따라서 이에 대한 치료로 기관성형술이 주목할만한 관심을 보여주고 있다. 기관성형술의 방법으로는 손상된 기관의 위치나 크기에 따라 여러 가지가 있으나 부분절제 및 단단문합술, 경부피변과 자가이식물질등을 이용한 재건술을 들 수 있다. 1965년 Grillo가 개에서 환상절제후 기관성형술을 시행한 이래 환상기관협착의 경우에는 부분절제및 단단문합술이 많이 이용되고 있다. 또한 자가이식물질로는 비중격, 늑골, 이개의 연골이 많이 사용되고 있으며, Consiglio와 Caputo가 이개연골을 이용하여 기관성형술을 시행한 이래 Morgenstein은 기관결손이 있는 환자에서 이개연골을 사용하여 혼합이식을 시행하여 성공적인 재건을 보고하였다. 이개연골이식은 이비인후과의사에게는 쉽게 채취하여 활용할 수 있고 친근감이 있는 장점이 있다. 최근 본교실에서는 5예의 기관협착증 환자에서 이개연골이식(2예), 부분절제후 단단문합술(3예)에 의한 기관성형술을 시행하여 좋은 결과를 얻었기에 문헌고찰과 함께 보고하는 바이다.

• Journal of Chest Surgery
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• 제28권7호
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• pp.678-683
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• 1995

Arterial bypass for the chronic ischemia of the lower extremities underlying atherosclerotic obliterans has been performed with a number of alternative conduits from 1941 by Kunlin. It is indicated for the limb salvage of patients with threatened limb loss despite of several controversies in surgical treatment of atherosclerotic obliterans. From March 1991 to January 1995, 26 arterial bypasses were performed in 23 patients with the chronic ischemia of the lower extremities in our hospital. Their mean follow up period is 18.9 months ranging from 4 months to 44 months. Mean age is 60.9 years ranging 47 years to 76 years and the most prevalent incidence is the 6th decade. 21 patients are male and 2 patients are female. 19 of 23 patients are smokers. Clinical classifications by Fontaine are class II[21.7% , class III[34.8% and class IV[43.5% .Diabetes mellitus[47.8% , hypertension[43.5% , hyperlipid-emia[26% , tuberculosis[21.7% , cerebrovascular accident[13.0% and cardiac diseases[8.7% are associated. Aorto-single femoral bypass in 4 cases, aorto-bifemoral bypass in 5 cases, aortofemoral & femoropopliteal bypass in 2 cases, femoropopliteal bypass in 10 cases, popliteotibial bypass in 3 cases, femoropedal bypass[composite graft bypass in 2 cases were surgically approached. There are complicated early thrombosis in 4 cases those are required immediately reoperation, wound infection in 3 cases, hematoma in 3 cases, and so on. Postoperative complication rate is 53.8%.Postoperative patency rates are 84.6% at 6 months, 75.0% at 1 year, 70.0% at 2 years and 66.7% at 3 years. We usually used 6 mm & 8 mm graft for bypass, and the rate of thrombosis formation is 28.6%[2/7 in 6 mm graft and 12.5%[2/16 in 8 mm separately. In according to the graft materials, the rate of thrombosis formation is higher in the group using artificial graft than in that using autologous saphenous vein[16.6% vs 12.5% . Limb salvage rate is 76.9%. Postoperative mortality rate is zero %.

• 대한두개안면성형외과학회지
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• 제12권2호
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• pp.111-115
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• 2011

Purpose: Reconstruction of a full thickness defect of the nose is a difficult task for plastic surgeons because the anatomical characteristic, shape, and function of the nose all need to be taken into consideration. Most often, a local flap or a composite graft is used, but for a large defect, reconstruction using free flaps is the most ideal method. In free flap reconstruction, the chondrocutaneous preauricular area can be a suitable donor site. We performed a chondrocutaneous preauricular free flap with an interpositional vascular graft for reconstruction of a nasal ala. Methods: A 46 year-old male presented to the hospital with a right alar deformity induced by a dog bite. During the surgery, the existing scar tissue was removed and thereby a newly formed full thickness defect was reconstructed using the chondrocutaneous preauricular free flap with an interpositional vascular graft harvested from the descending branch of the lateral femoral circumflex vessel between the facial and superficial temporal vessels of the free flap. Results: The flap survived without flap loss and showed symmetry in its overall shape, contour, texture, and color. The patient was satisfied with the results and the surgery yielded no additional scars at the nasolabial fold area. Conclusion: The chondrocutaneous preauricular free flap is a valuable method in reconstruction of full thickness defects of the nose, and using the descending branch of the lateral femoral circumflex vessel as the interpositional vascular graft at the anastomotic site produces reliable results.

• Journal of Chest Surgery
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• 제38권9호
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• pp.601-608
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• 2005

배경: 조직학적 장점과 생리학적 단점을 최소화하기 위해 저자들은 완전동맥도관 관상동맥우회로 조성술 시행 시에 골격화 방식으로 체취한 우위대망동맥을 유리 이식편으로 사용해 오고 있다. 본 연구는 골격화된 우위대망동맥을 조합도관이나 연장도관으로 사용하는 것의 효용성에 대해 알아보기 위해 수행되었다. 대상 및 방법: 2000년 1월부터 2005년 2월까지 골격화 우위대망동맥을 유리 이식편(연장도관 22명, 조합도관 107명, 기타 4명)으로 사용하여 관상동맥 우회로 조성술을 시행했던 133명 (43 여자, 평균연령 61.8세)을 대상으로 하였다. 관상동맥 조영술을 수술 직후(중간값 14일, 86명), 초기(중간값 366일, 56명) 그리고 중기(중간값 984일, 29명)에 각각 시행하였다. 결과: 조기 사망 3명 ($2.2\%$)이었고 만기 질환 연관성 사망이 4명($3.3\%$)였다. 환자 당 평균 문합수는 전체 3.34개였으며 우위대망동맥은 1.92개였다. 수술직후, 초기, 중기의 우위대망동맥 개통률은 각각 157/159 ($98.7\%$), 105/112 ($93.7\%$), 50/56 ($89.3\%$)였다. 외래 관찰 중 4명의 환자가 우위대망동맥의 문합부 협착 또는 경쟁혈류에 의해 경피적 관상동맥 성형술이 필요하였다. 결론: 골격화 우위대망동맥 유리 이식편은 개통률 및 임상적인 면에서 만족스러운 결과를 보여주었다. 비록 대상환자들의 장기적인 관찰이 필요하겠지만 저자들은 골격화 우위대망 동맥 유리 이식편이 관상동맥우회로 조성술에 있어 효용성 있는 선택방법이 될 수 있을 것으로 생각한다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제33권1호
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• pp.44-48
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• 2011

Maxillary defects are inherently complex because they generally involve more than one midfacial component. In addition, most maxillary defects are composite in nature, and often require bony support, as well as a mucosal lining for reconstruction. Therefore, midfacial bone and soft tissue defects present a unique challenge because they require a complex arrangement of tissues in a relatively limited space. This might be difficult to achieve only with free osteocutaneous flaps. The use of bone grafts allows greater flexibility in a reconstruction but is limited by graft resorption. We report a case of a patient reconstructed with a lateral arm free flap, iliac bone graft, sagital split ramus osteotomy for the reconstruction of a right maxillary defect zygomatico-maxillary defect caused by a zygomatico-maxillary malignant tumor resection.

• Journal of Chest Surgery
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• 제27권7호
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• pp.581-586
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• 1994

From February 1985 to February 1993, 18 operations were performed in 17 patients for treatment of aneurysmal disease [n=12] and/or dissection of the ascending aorta [n=6]. The ages ranged from 26 to 69 years [mean 44.3 $\pm$ 11.0 years].The proposed operations include composite graft replacement of aortic valve and ascending aorta with coronary reimplantation in 11, graft replacement of ascending aorta alone in 5, aortic valve replacement and supracoronary graft replacement in 1 and ascending aorta to abdominal aorta bypass with thromboexclusion of descending aorta in one patient. Both Bentall [n=6] and Cabrol [n=5] technique were utilized for reimplantation of coronary arteries.Concomitant replacement of aortic arch and arch vessel reconstruction was necessary in two patients. Hypothermic circulatory arrest was utilized in 6 patients. Recently, four patients were managed on warm blood continuous cardioplegia via retrograde route. There were no operative deaths. No significant postoperative complications were noted. Postoperative follow up was complete in 15 patients from 1 month to 72 months. Redo operation was necessary in one patient who had suffered from distal recurrence of dissection 5 years after successful Bentall operation. The other patients are all in excellent clinical condition. From our early experience with those 17 cases, we assume that satisfactory operative result could be achieved with a variety of surgical technique including hypothermic circulatory arrest. In addition, continuous perfusion of warm blood cardioplegia via retrograde route is supposed to be beneficial in selected cases.

• Elastomers and Composites
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• 제54권3호
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• pp.182-187
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• 2019

To improve the mechanical properties of glass-fiber-reinforced polypropylene (PP) composites through interfacial adhesion control between the PP matrix and glass fiber, the surface of the glass fiber was modified with PP-graft-maleic anhydride (MAPP). Surface modification of the glass fiber was carried out through the well-known hydrolysis-condensation reaction using 3-aminopropyltriethoxy silane, and then subsequently treated with MAPP to produce the desired MAPP-anchored glass fiber (MAPP-a-GF). The glass-fiber-reinforced PP composites were prepared by typical melt-mixing technique. The effect of chemical modification of the glass fiber surface on the mechanical properties of composites was investigated. The resulting mechanical and morphological properties showed improved interfacial adhesion between the MAPP-a-GF and PP matrix in the composites.