• Journal of Chest Surgery
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• 제42권1호
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• pp.111-114
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• 2009

대-장골동맥류는 드문 질환으로 자연 경과 또한 잘 알려져 있지 않다. 파열의 위험성이 높고 파열시 사망률이 매우 높은 질환으로 알려져 있다. 저자들은 파열의 가능성이 높았던 대-장골 동맥류 환자에게 stent-graft를 이용한 혈관내 치료와 골반 허혈을 방지하기 위해 시행한 양측 내, 외 장골동맥간 우회술의 복합(hybrid) 치료를 시행하였기에 보고 하는 바이다

• 대한의용생체공학회:의공학회지
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• 제16권1호
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• pp.1-8
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• 1995

A variety of experiments of endothelial cell seeding onto artificial vessels have been performed. To improve endothelialization, one or two components of the extracellular matrix (ECM) have been used as an underlying matrix. In this study, the whole ECM excreted from fibroblasts was used as an underlying matrix. Fetal human fibroblasts were cultured on a polyurethane (PU) sheet. After a conflu; ence was attained, the cytoskeleton and the nuclei of the fibroblast were destroyed using Triton-X. Mitomycin, or irradiation. Omental microvascular endothelial cells from adult human were seeded onto various substrates. After 12 days in culture, the cells were counted. It was observed that the ECM treated by irradiation had the highest cell number. In addition, the cells on this substrate exhibited the most typical endothelial cell morphology. For preliminary animal experiments the PU vessels (inner diameter, 1.5mm) coated with ECM were implanted in the infrarena] abdominal aorta of rat. After the vessels had been implanted for 5 weeks, it was found that the surface of the PU vessels was completely covered with endothelia] cells. In conclusion, we can state that the fibroblast-derived whole ECM makes a better underlying substrate for the endothelialization of small diameter artificial vessels.

• Journal of Yeungnam Medical Science
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• 제3권1호
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• pp.319-323
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• 1986

본 저자들은 Abdominal aorta와 iliac artery의 혈전성 패색에 의해 양측 하지의 동통, 창백 및 미약한 위축과 성불능이 있는 Leriche 증후군 1례를 Dacron graft를 사용하여 Aortobifemoral graft를 시술하여 좋은 결과를 얻었기에 문헌고찰과 함께 보고하는 바이다.

• Journal of Chest Surgery
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• 제43권4호
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• pp.424-427
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• 2010

최근 흉부 및 복부 대동맥류 질환에 대해 스텐트 그라프트 삽입이 수술적 치료와 함께 널리 시행되고 있다. 그러나 하행 대동맥박리인 경우 스텐트 그라프트 사용에 대해서는 논란의 여지가 있다. 저자들은 파열이 임박한 하행 대동맥박리 환자에서 스텐트 그라프트를 삽입하여 치료 후 3개월 뒤의 흉부전산화단층촬영에서 양호한 결과를 얻은 경험이 있기에 이를 보고하는 바이다.

• Journal of Chest Surgery
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• 제47권5호
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• pp.478-482
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• 2014

A 39-year-old man presented with cough, chest discomfort, and weight loss. On the basis of the patient history and laboratory findings, he was diagnosed with the hypereosinophilic syndrome. Transthoracic echocardiography revealed a large thrombus in the left ventricle. Medical treatment with anticoagulation and immunosuppression was commenced immediately. Fourteen days after the initial diagnosis, the patient presented with acute pain in his right leg. Computed tomographic angiogram showed embolic occlusion of the infrarenal abdominal aorta and bilateral iliac (including common, external, and internal iliac) arteries. Emergent thromboembolectomy and left ventricular thrombectomy were performed. The postoperative course was uneventful, and the patient has undergone follow-up for 2 months without any evidence of recurrence of thromboembolism.

• 한국임상수의학회지
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• 제34권4호
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• pp.283-286
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• 2017

A 4-month-old, female Maltese dog was referred with continuous heart murmur. Patent ductus arteriosus was diagnosed via radiography and echocardiography. The patient was untreated because of client's refusal. After 13 months, the dog was referred again with seizure and salivation. Laboratory examination revealed increased liver enzymes, hyperammonemia and decreased total cholesterol and total protein. Microhepatica was identified on abdominal radiography. CT angiography showed a shunt vessel that originated from the portal trunk to the prehepatic caudal vena cava and patent ductus arteriosus connecting proximal descending aorta with the main pulmonary artery. No portal vasculature toward liver is observed after shunt vessel. The patient was diagnosed as concurrent patent ductus arteriosus and congenital extrahepatic portosystemic shunt with suspected portal vein aplasia. In human, cardiac malformations are frequently observed in patients with congenital extrahepatic portosystemic shunt with portal vein aplasia. This report described concurrent patent ductus arteriosus and congenital extrahepatic portosystemic shunt with suspected portal vein aplasia in a dog.

• 대한의용생체공학회:의공학회지
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• 제22권4호
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• pp.349-358
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• 2001

A novel electro-mechanical implantable ventricular assist system is developed as a bridge to transplantation or recovery for patients with end-stage heart failure. The developed system is composed of an implanted blood pump, an external monitoring system which stores data, and a wearable system including a portable external driver and a portable power supply system. The blood pump is designed to be implanted into the left upper abdominal space and provides blood flow from the left ventricular apex to the aorta. The pulsatile blood flow is generated by a double cylindrical cam. There was mo excessive heat emission from the blood pump into the temperature-controlled chamber in the heat test and no stagnated flow within the blood sac by the observation in the flow visualization test. Animal experiments were performed using sheep and calves. The maximum assist flow rate reached 7.85L/min in the animal experiment. The evaluation results showed that the developed system was feasible for the implantable ventricular assist system. The long-term in vitro durability test and mid-term in vivo experiments are in progress and mow the modified next model is under development.

• 한국임상수의학회지
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• 제35권1호
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• pp.26-29
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• 2018

A 6-month-old, female poodle presented with a three-month history of persistent regurgitation immediately after eating. On physical examination, the patient was emaciated and dehydrated. Thoracic radiography showed ventral displacement of the trachea and increased radiopacity in the mediastinum, cranial to the heart base. A severely dilated esophagus was identified cranial to the heart on esophagram. Computed tomography (CT) revealed the esophagus was filled with gas, fluid and a little of contrast and dilated from caudo-cervical to cranio-thoracic part. The esophageal diameter was markedly decreased at the heart base. In addition, the trachea was displaced to the left-ventral side of the right aortic trunk and an aberrant left subclavian artery originating from the aorta was identified. There was no evidence of abdominal vascular anomaly. Based on diagnostic imaging, persistent right aortic arch (PRAA) with an aberrant left subclavian artery was diagnosed. The patient did not undergo surgery and died at 15 days after diagnosis. This report describes imaging diagnosis, including CT and radiography in a weaned dog with regurgitation due to esophageal obstruction by PRAA. When PRAA is suspected and conventional radiography or contrast study is insufficient for diagnosis, CT may be helpful for diagnosing PRAA.

• Journal of Chest Surgery
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• 제36권5호
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• pp.356-362
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• 2003

배경: 폐격리증의 발생기전에 대해서는 발생학적 이상에 의한 선천성 질환으로 생각해왔으나 대부분의 내엽성 폐격리증은 유아에서는 거의 발생하지 않고 동반된 선천성 기형이 비교적 드물다는 점에서 후천성 병변으로 보는 것이 타당하다고 생각한다. 대상 및 방법: 1985년 12월부터 2002년 7월까지 수술절제 후 병리소견상 내엽성 폐격리증으로 확인된 환자 25명을 대상으로 하였다. 환자들의 의무기록을 후향적으로 분석하여 환자의 나이 및 성별, 수술 전 증상 및 동반질환의 유무, 다른 선천성 병변의 동반여부, 이학적 소견, 술 전 검사방법 및 처치, 병변의 위치 및 수술 방법, 이상동맥의 기원과 크기 및 개수, 주요병변 및 동반병변의 병리소견, 술 후 합병증 등을 각각 조사하였다. 결과: 남녀 성비는 남자 8명(32%), 여자 17명(68%)으로 여자가 많았으며 나이분포는 1세에서 57세까지로 평균나이는 23세이었다. 호흡기계 임상증상이 있었던 경우가 14예(56%)로 절반 이상을 차지하였으나 증상이 없이 우연히 발견되거나 흉통만을 호소하는 경우도 11예(44%)로 많은 부분을 차지하였다. 수술 전에 폐격리증으로 진단할 수 있었던 경우는 8예(32%)에 불과하였고 그 외에 종격동 종양 혹은 폐종양으로 진단되었던 경우가 8예(32%), 선천성 혹은 후천성 낭종성 질환, 폐농양 혹은 기관지확장증으로 진단되었던 경우가 각각 5예(20%), 4예(16%) 있었다. 수술 시 이상동맥의 존재를 확인하였던 22명의 환자에서 하행 흉부대동맥에서 기시한 경우가 19예(86.4%)로 가장 많았고 흉부 및 복부 대동맥에서 기시한 경우가 2예, 복부 대동맥에서 기시한 경우가 1예 있었다. 수술 당시 연령을 10세 미만과 10세 이상으로 나누어 조사한 결과 다른 선천성 기형의 동반여부는 각각 30%, 6.7%로 연령이 어릴수록 많았으나 선천성 원인에 의한 내엽성 폐격리증으로 진단된 경우는 각각 10%, 6.7%로 두 군 간에 통계적으로 차이가 없었다(p>0.05). 병리조직소견상 주된 병변은 나이에 관계없이 만성 염증 및 낭종성 변화를 보이고 있었으며 주위조직과의 유착정도도 비슷하게 관찰되었다. 결론: 내엽성 폐격리증 환자들의 임상적 특성을 보면 특별한 증상 없이 우연히 발견되거나 호흡기감염과 관계없는 흉통만을 호소한 경우가 44%로 많은 부분을 차지하며 특히 연령이 높을수록 수술 전에 종격동 종양 혹은 폐종양으로 진단되었던 경우가 많았다. 10세 미만의 환자에서 다른 선천성 기형의 동반이 많았으나 병변의 조직병리소견 및 선천성 비율을 볼 때 대부분이 후천성 병변으로 확인되었다.

• 한국임상수의학회지
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• 제38권3호
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• pp.135-142
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• 2021

The aim of this study was to evaluate the contrast effect if a saline flush following low-volume contrast medium bolus improves vascular and parenchymal enhancement using a saphenous vein in abdominal CT for small animals. Six clinically healthy beagle dogs underwent abdominal contrast-enhanced CT. They were divided into nine groups (each group, n = 6), according to the volume of contrast medium 1, 2, and 3 mL/kg, and volume of the saline solution 0, 5, and 10 mL. Dynamic CT scanning was performed at the hepatic hilum level. The maximum contrast enhancement, time to maximum enhancement, and time to equilibrium phase were calculated from the time attenuation curves. Mean attenuation values for all groups were measured in the aorta, portal vein, and liver. After contrast enhancement, grading of image quality regarding surrounding artifacts and evaluation of the hepatic hilum structures was performed. For comparison of the effect of the contrast material and saline solution doses, differences in mean attenuation values between the contrast medium 2 mL/kg without saline flush group and the remaining groups, and between contrast medium 3 mL/kg without saline flush group and the remaining groups, were analyzed for statistical significance. There were no significant differences between with and without saline flushing at the same contrast medium dose groups. There were no significant differences in peak values between the 3 mL/kg dose of contrast medium alone and the 2 mL/kg dose of contrast medium with saline solution flush. However, there was a significant difference in peak values between the 3 mL/kg dose of the contrast medium without the saline flush group and the 2 mL/kg dose of the contrast medium alone group. Grades of the artifacts were not significantly different in the saline flush regardless of the dose of the contrast medium. Using 2 mL/kg of contrast medium with saline solution flush resulted in similar liver parenchyma attenuation, compared with using 3 mL/kg of contrast medium without saline solution flush. In CT evaluation of hepatic parenchymal diseases, using 2 mL/kg of contrast medium with saline solution flush may yield decreased risk of contrast nephropathy and cost-saving.