• Journal of Chest Surgery
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• 제51권3호
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• pp.213-215
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• 2018

Aneurysm and pseudoaneurysm of the dorsalis pedis artery (DPA) are rare vascular entities. Pseudoaneurysms of the DPA are commonly due to blunt trauma, sharp penetrating injury, fracture, or iatrogenic injury. Herein, we report the case of a patient with a rare iatrogenic pseudoaneurysm that occurred after blood sampling. The diagnosis was suspected based on palpitation of a pulsatile mass on the dorsal foot and confirmed by color Doppler ultrasound and computed tomography angiography. Surgical treatment was successfully performed by reconstruction with an autologous venous graft. The patient recovered well, with no ischemic complications.

• Journal of Biomedical Engineering Research
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• 제11권1호
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• pp.131-140
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• 1990

To improve antithrombogenicity of polymer that used in vascular graft and artificial organs, seeding of human endothelial cells on the polyurethane was studied. Human endothelial cells were ismlated from human umbilical veins, using type I collagenase, and identified with goat anti vWF antibodies. Human endothilial cell seeding was tried upon the polyurethane which has good mechanical property and resists stresses. The hydrophobic polyurethane surface was changed hydrophilic by corona discharf:e treatment. Surface hydrophilicity was measured with Wilhemly plate method and the goniometer. To evaluate matrix protein adsorption, fibronectin adsorption test was done. To eveluate cell adhesion, human endothelial cell attachment forces were measured rising a perfusion chamber of , ism diamter. Less cells were detached from the hydrophilically treated polyurethane. This showed that corona discharge on the polyurethane could improve matrix adsorption and endothelial cell attachment.

• Journal of Chest Surgery
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• 제27권12호
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• pp.1042-1046
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• 1994

We experienced a case of traumatic aneurysm of descending thoracic aorta by an automobile accident. The patient was 23-year-old-male with a traumatic aortic aneurysm [6x12cm] on the descending thoracic aorta just distal to the origin of the left subclavian artery. Exposure was obtained through a left posterolateral thoracotomy incision in the fourth intercostal space and then partial femoro-femoral cardiopulmonary bypass was established.After aortic cross- clamping, the aneurysmal sac was opened and repaired with interposition of Dacron vascular graft and aortic cross-clamping period lasted for 100 minutes. Postoperative bleeding and vocal cord paralysis were complicated, but bleeding was controlled by reoperation and vocal cord paralysis was improved. Follow up was continued for 14months and postoperative course was uneventful.

• Journal of Chest Surgery
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• 제44권3호
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• pp.247-249
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• 2011

We report a case of pseudo-pseudoaneurysm, which is a very rare complication of myocardial infarction. A 69-year-old man was admitted to our clinic with chest tightness and dyspnea. He had undergone aortic valve replacement with a pericardial bioprosthetic valve, ring mitral annuloplasty, and reconstruction of an aortic annular defect due to infective endocarditis with bovine pericardium 4 years prior. Echocardiography and computed tomography showed pericardial effusion and a 16-mm cavity at the anterolateral wall of the left ventricle. Magnetic resonance imaging suggested either pseudo-pseudoaneurysm or myocardial abscess. We successfully repaired the myocardial defect using a patch made from a vascular graft with pledgeted horizontal mattress sutures under cardiopulmonary bypass.

• Journal of Chest Surgery
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• 제19권3호
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• pp.489-493
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• 1986

Takayasu`s arteritis is an arteritis of unknown etiology involving larger elastic arteries such as aorta and its branches, pulmonary arteries, and rarely coronary arteries. The late pathologic feature is vascular obstructive change and the resulting clinical manifestations are local ischemic symptoms such as syncope, visual disturbance, claudication of extremities, hypertension, and angina. the disease occurs predominantly in females, with the age of onset between 10 and 30 years. Recently we have experienced one case of Takayasu`s arteritis involving aortic arch and all its major branches. The patient was 36 year-old female and she was admitted because of headache, blurred vision, and easy fatigability and motor weakness of upper extremities. Aortogram revealed total obstruction of both carotid arteries at the site of its origin and partial irregular obstructive change in the innominate artery and both subclavian arteries. Bypass graft surgery using Gore-Tex grafts was performed with successful result.

• Journal of Chest Surgery
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• 제46권5호
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• pp.353-356
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• 2013

A 74-year-old man was diagnosed with aortic root aneurysm and two-vessel coronary disease. Echocardiographic assessment revealed an enlarged sinus of Valsalva 60 mm in diameter with mild aortic regurgitation. Florida sleeve repair was performed using a vascular graft combined with coronary artery bypass grafting. The postoperative course was uncomplicated and follow-up echocardiographic evaluations showed an aortic root diameter of 38 mm without aortic insufficiency up to 1 year after surgery.

• Journal of Biomedical Engineering Research
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• 제17권3호
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• pp.355-364
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• 1996

Construction of the stable monolayer of endothelial cells onto physicochemically modified polymeric surFace is one of the appropriate method to develop the small caliber vascular graft with the long-term patency. In this study, we constructed the monolayer of endothelial cells on the fibronectin rind the extracellular matrix-coated polyurethane surface derived from human fibroblast cells. To elucidate the adhesion strength of endothelial cells on the extracellular matrix-coated polyurethane, a laminar flow chamber apparatus was developed to exposure the shear stress on the apical membrane of ondothelial cells. Endothelial cells show the strongest adhesion after two days of seeding onto the fibronectin-coated polyurethane surface, whereas endothelial cells on the extracellular matrix derived from the human flbroblast cells show the minimal doubling time of cellular growth.

• Proceedings of the KOSOMBE Conference
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• 대한의용생체공학회 1993년도 춘계학술대회
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• pp.102-104
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• 1993

• Journal of Biomedical Engineering Research
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• 제20권5호
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• pp.593-599
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• 1999

수축절정기에 0.2mm, 0.4mm 두께의 소구경 인조혈관의 내경3.2mm의 동맥에 문합한 단단문합 주위의 유동과 구조해석을 동시에 수행하였다. 유동해석 결과 속도분포 및 벽단전률은 타 연구결과와 매우 유사하며 이론해와 매우 유사함을 보였다. 유동에 의해서 문합부 주위에 작용하는 응력은 문합부에 집중되며 이는 수십만 pa에 달했다. 또한 인조혈관과 동맥에 작용하는 원주방향의 응력을 이론해와 비교한 결과 서로 유사함을 보였으며 두께가 얇은 인조혈관을 사용하는 경우 문합부의 compliance mismatch 는 개선되나 반대로 응력은 더 많이 받음을 알 수 있었다. 본 연구를 통해서 유체에 의하여 혈관이 영향을 받는 심혈관계 현상을 연구하는데 있어서 이와 같은 유체-구조 상호작용을 고려하여 동시에 해결 하는 방법은 매우 유용할 것으로 생각된다.

• Proceedings of the KOSOMBE Conference
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• 대한의용생체공학회 1993년도 추계학술대회
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• pp.126-127
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• 1993