• 한국키틴키토산학회지
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• 제23권4호
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• pp.256-261
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• 2018

Recently, the number of cardiovascular disease-related deaths worldwide has increased. Therefore, the importance of percutaneous cardiovascular intervention and drug-eluting stents (DES) has been highlighted. Despite the great clinical success of DES, the re-endothelialization at the site of stent implantation is retarded owing to the anti-proliferative effect from the coated drug, resulting in late thrombosis or very late restenosis. In order to solve this problem, studies have been actively carried out to excavate new drugs that promote rapid re-endothelialization. In this study, we introduced hydrophilic drug, tauroursodeoxycholate (TUDCA), that improves the proliferation of endothelial progenitor cells and promotes apoptosis of vascular smooth muscle cells. In addition, we utilized shellac, which is a natural resin from lac bug to coat TUDCA on the surface of the metal. When using conventional coating method including biodegradable polymers and organic solvents, phase separation between polymer and drug occurred in the coating layer that caused incomplete incorporation of drug into the polymer layer. However, when using shellac as a coating polymer, no phase separation was observed and drug was fully covered with the polymer matrix. In addition, by adjusting the composition of coating solution and modifying the hydrophilicity of the metal surface using oxygen plasma, the surface roughness decreased due to the increased affinity between coating solution and metal surface. This result provides a method of depositing a hydrophilic drug layer on the stent.

• 한국방사선학회논문지
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• 제14권3호
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• pp.319-336
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• 2020

미만성 긴 병변이 있는 급성심근경색증 환자에서 장기적인 임상 결과에 대해 중첩된 약물용출스텐트와 긴 단일 약물용출스텐트라는 두 가지 중재 방법으로 시술한 환자의 관상동맥조영술 결과와 임상결과를 비교·분석하였다. 2008년 6월부터 2019년 3월까지 급성심근경색환자 (65.9±11.0세, 남성 306명)가 미만성 긴 관상동맥 병변 30 mm이상 병변에 대해서 두 그룹으로 나뉘었습니다. 그룹I (중첩 약물용출스텐트 그룹; n=140) 및 그룹II (긴 단일 약물용출스텐트 그룹; n=298). 주요심장사건의 발생률을 비교하였다[주요심장사건; 두 그룹 사이에서 12개월 동안 심장사망률, 심근경색, 표적병변 재개통술 및 스텐트 혈전증]. Everolimus-용출 스텐트는 그룹I보다 그룹II에서 더 일반적으로 사용되었고(28.1% vs. 51.8% p<0.001), 시술 전 평균 병변직경은 그룹II에서 약간 굵었고 (3.1±0.3mm vs. 3.2±0.3mm, p=0.042), ACC / AHA 병변 유형C의 유병률은 그룹I에서 더 높았다(41.7% vs. 25.4%, p<0.001). 12개월 동안 주요심장사건의 발생률은 그룹II보다 그룹I에서 더 높았고(18.5% vs. 14.4%, p=0.034), 심장 사망률 (2.1% vs. 4.4%, p=0.667), 심근경색 (5.0% vs. 2.7%, p=0.260) 및 스텐트 혈전증률 (0.7% vs. 1.7%, p=0.669)은 두 그룹 차이가 없었다. 그러나 표적병변 재개통술 비율은 그룹I에서 더 높았다(10.7% vs. 5.6%, p=0.041). 다변량 로지스틱 회귀 분석에서 당뇨병의 존재[위험률 2.383, 95 % 신뢰 구간 1.332-4.260, p=0.003]과 파클리탁셀-용출 스텐트[위험률 2.367, 95 % 신뢰 구간 1.371-4.086), p=0.002]는 12개월 주요심장사건의 독립적 예측인자였으며, 두 그룹 사이의 유병률에 큰 차이가 없었다. 미만성 병변이 있는 급성심근경색 환자에서 12개월의 추적 관찰 기간 동안 중첩 약물용출스텐트 그룹에서 표적병변 재개통술 비율이 더 높았고 당뇨병의 존재 및 파클리탁셀-용출 스텐트의 사용은 주요심장사건의 독립적인 예측인자였다.

• Nuclear Medicine and Molecular Imaging
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• 제40권2호
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• pp.113-119
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• 2006

Coronary artery disease is a loading cause of morbidity and mortality across the world. Percutaneous coronary intervention has become the major technique of revascularization. However, restenosis remains a major limitation of this procedure. Recently the need for repeat intervention due to restenosis, the most vexing long-term failure of percutaneous coronary intervention, has been significantly reduced owing to the introduction of two major advances, intracoronary brachytherapy and the drug-eluting stents. Intracoronary brachytherapy has been employed in recent years to prevent restenosis lesions with effective results, principally in in-stent restenosis. Restenosis is generally considered as au excessive form of normal wound healing divided up in precesses: elastic recoil, neointimal hyperplasia, and negative vascular remodeling. Restenosis has previously been regarded as a proliferative process in which neointimal thickening, mediated by a cascade of inflammatory mediators and other factors, is the key factor. Ionizing radiation has been shown to decrease the proliferative response to injury in animal models of restenosis. Subsequently, several randomized, double blind trials have demonstrated that intracoronary brachytherapy can reduce the rates of both angiographic restenosis and clinical event rates in patients undergoing percutaneous coronary intervention for in stent restenosis. Some problems, such as late thrombosis and edge restenosis, have been identified as limiting factors of this technique. Brachytherapy is a promising method of preventing and treating coronary artery restenosis.

• Journal of Chest Surgery
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• 제54권3호
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• pp.172-178
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• 2021

Background: Complicated acute type B aortic dissection is a life-threatening condition with high morbidity and mortality. The aim of this study was to report a single-center experience with endovascular stent-graft repair of acute type B dissection of the thoracic aorta and to evaluate the mid-term outcomes. Methods: We reviewed 18 patients treated for complicated acute type B aortic dissection by thoracic endovascular aortic repair (TEVAR) from September 2011 to July 2017. The indications for surgery included rupture, impending rupture, limb ischemia, visceral malperfusion, and paraplegia. The median follow-up was 34.50 months (range, 12-80 months). Results: The median interval from aortic dissection to TEVAR was 5.50 days (range, 0-32 days). There was no in-hospital mortality. All cases of malperfusion improved except for 1 patient. The morbidities included endoleak in 2 patients (11.1%), stroke in 3 patients (16.7%), pneumonia in 2 patients (11.1%), transient ischemia of the left arm in 1 patient (5.6%), and temporary visceral ischemia in 1 patient (5.6%). Postoperative computed tomography angiography at 1 year showed complete thrombosis of the false lumen in 15 patients (83.3%). Conclusion: TEVAR of complicated type B aortic dissection with a stent-graft was effective, with a low morbidity and mortality rate.

• Journal of Chest Surgery
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• 제37권11호
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• pp.911-917
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• 2004

배경: 하지심부정맥 혈전증의 원인으로 알려져 있는 May-Thurner증후군(혹은 장골정맥 눌림증후군)의 임상 증상, 진단 및 혈관내 치료에 대해 분석하고자 하였다. 대상 및 방법: 2001년 3월부터 2003년 7월까지 May-Thurner증후군으로 진단 받은 12명의 환자들을 대상으로 하였으며 진단방법으로는 정맥조영술, 정맥초음파, 혈관조영 컴퓨터 단층촬영을 이용하였고 혈관내 시술은 혈전용해술, 혈전제거술, 혈관성형술, 혈관내 스텐트삽입 등을 시행하였다. 결과: 임상양상으로는 하지부종이 4예, 하지의 통증이 1예에서 보였으며 5예에서는 하지부종과 통증이 동반되었고 하지부종과 통증과 압통이 동반된 경우도 1예였다. 1예에서는 부종이나 통증은 없었으며 하지정맥류로 인해 시행한 정맥조영술에서 May-Thurner증후군이 발견되었다 진단방법으로는 임상양상과 더불어 1예를 제외하고는 모든 환자들이 정맥 조영술과 혈관조영 컴퓨터 단층촬영을 시행하였고 이중 4예에서는 정맥 초음파를 시행하였다. 혈관성형술을 11예에서 시행하였고, 혈관내 스텐트 삽입은 10예, 혈전 제거술은 9예, 혈전용해술은 7예에서 시행되었다. 9예에서 추적관찰을 하였고 이중 7예에서 혈관내 원활한 혈류의 흐름을 관찰할 수 있었다. 결론: 하지의 심부정맥 혈전증 환자에 있어서 May-Thurner증후군의 가능성을 충분히 인식하여야 하며 이의 진단을 위하여 다양한 방법이 필요하며 치료 방법으로는 혈관내 시술이 안전하면서 효과적이라고 생각된다.

• 대한영상의학회지
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• 제85권4호
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• pp.746-753
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• 2024

목적 본 연구는 기능 부전의 동정맥루에 대한 경피적 혈관성형술 후 발생한 정맥 파열의 유병률 및 관리에 대하여 다루고자 하였다. 대상과 방법 1998년 1월부터 2015년 12월까지, 6732명의 환자(여성 3685명, 남성 3047명, 평균 나이 58.60 ± 12.84세; 평균 혈액투석 접근 시기: 34.32 ± 39.35개월)에 대하여 시행된 13506건의 경피적 혈관성형술, 기계적 혈전제거술, 그리고 혈전용해술이 검토되었다. 경피적 혈관성형술 후 정맥 혈관이 파열된 비율을 확인하였고 일차 개통은 시술 후 정맥 혈관의 파열된 상태, 혈전의 존재 유무, 치료 방법에 따라 결정되었다. 결과 정맥 파열은 13506건의 시술 중 604건에서 발생했다. 정맥 혈관 파열은 여성, 동정맥 이식, 그리고 혈전이 동반되었을 경우 호발하였다. 풍선 탐포네이드는 604건의 파열 사례에서 시행되었고 스텐트 시술은 조영제 유출과 혈류 정체가 지속되었을 때, 119건에서 시행되었다. 일차 개통은 파열군보다 비파열군에서 더 우수하게 나타났다. 그러나, 접근 유형과 혈전의 존재 유무는 개통 측면에서 유의한 차이가 없었다. 파열 환자의 일차 개통 시간은 지속적인 풍선 탐포네이드 후 8.4개월 이였고 스텐트 시술 후 11.2개월이었다. 결론 풍선 탐포네이드와 비피막형 스텐트 설치는 경피적 혈관성형술 관련 정맥 파열에서 적용될 수 있는 치료 방법이다. 특히, 스텐트 설치는 비파열군과 유사한 개통 시간을 보여주었다.

• Journal of Chest Surgery
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• 제42권5호
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• pp.677-683
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• 2009

메이-터너 증후군은 좌측 장골정맥이 우측 총장골동맥에 눌러져 발생하는 장골-대퇴정맥의 심부정맥 혈전증이다. 비록 카테터를 이용한 혈전제거 술과 혈전용해 및 스텐트 삽입술이, 기술적 수월함과 낮은 재발율로 인해 급성기 혹은 아급성기의 메이-터너 증후군 환자들에게 보편적인 치료법으로 인식되고 있지만 일부 환자에서는 치명적인 합병증을 일으킬 수 있다. 더군다나 만성 메이-터너 증후군 환자에서의 궁극적인 적절한 치료법은 아직 정립되어 있지 않다. 저자들은 2예의 만성 메이-터너 증후군 환자에서 혈관 내 치료법 실패 후 수술적 혈전제거 술과 스텐트 삽관술, 동정맥루 조성술을 적용하였다. 이러한 수술적 치료법은 일부 혈관 내 치료가 적응증이 될 수 없는 환자에게 유의한 치료법으로 이용될 수 있을 것이다.

• 한국임상약학회지
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• 제24권2호
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• pp.106-114
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• 2014

Purpose: Recent investigations suggest that the antiplatelet effect of clopidogrel may be decreased when this medication is taken together with certain proton pump inhibitors (PPIs). However, there has been no study conducted in Korea regarding the clinical effect of clopidogrel-PPI interaction. This study targeted patients who received stents to investigate the effect of the concomitant use of clopidogrel and PPIs on the occurrence of adverse cardiovascular events in Korean patients. Methods: The patients who received a stent insertion at the Yeouido St. Mary's Hospital between January 2010 and April 2011 were included. The patients were divided into two groups, clopidogrel and clopidogrel + PPI, and followed for 12 months after the date of stent insertion using prescription history and medical records. The recurrence rates of the cardiovascular events among the two patient groups were statistically analyzed. Results: There was no difference between the two groups in the basic characteristics of the 157 patients in the clopidogrel group and the 62 patients in the clopidogrel+PPI group. Simple logistic regression showed a significantly higher rate of re-hospitalization in the clopidogrel+PPI group (OR=1.893, 95% CI 1.040-3.445, p=0.037). However, the results of the multivariate logistic regression of the variables found to have statistical significance by crosstabulation showed no significant difference in the rate of adverse cardiovascular events or re-hospitalization between the two groups. Conclusions: There was no significant difference between the clopidogrel and clopidogrel+PPI group among new patients with cardiovascular stents with respect to the occurrence of revascularization procedures, stent thrombosis, or chest pain, or with respect to the re-hospitalization rate for all cardiovascular events.

• Journal of Yeungnam Medical Science
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• 제33권2호
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• pp.166-169
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• 2016

Afferent loop obstruction following gastrectomy is a rare but fatal complication. Clinical features of afferent loop obstruction are mainly gastrointestinal symptoms. A 56-year-old female underwent radical total gastrectomy with Roux-en-Y esophagojejunostomy for treatment of advanced gastric cancer. After fourteen months postoperatively, she showed gradual development of edema of both legs. Computed tomography (CT) scan showed disease progression at the jejunojejunostomy site and consequent dilated afferent loop, which resulted in inferior vena cava (IVC) compression. A drainage catheter was placed percutaneously into the afferent loop through the intrahepatic duct and an IVC filter was placed at the suprarenal IVC, and self-expanding metal stents were inserted into bilateral common iliac veins. With these procedures, sympotms related with afferent loop obstruction and deep vein thrombosis were improved dramatically. The follow-up abdominal CT scan was taken 3 weeks later and revealed the completely decompressed afferent loop and improved IVC patency. Surgical treatment should be considered as the first choice for afferent loop obstruction; however, because it is more immediate and less invasive, non-surgical modalities, such as percutaneous catheter drainage or stent placement, can be effective alternatives for inoperable cases or risky patients who have severe medical comorbidities.

• Journal of Yeungnam Medical Science
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• 제30권1호
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• pp.31-35
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• 2013

Hematoma is quite a common complication of femoral arterial catheterization. However, to the best of our knowledge, there have been no previous studies regarding deep vein thrombosis (DVT) caused by compression of a vein due to a hematoma. We report a case of a hematoma developing after femoral arterial catheterization and causing extensive symptomatic DVT. A 59-year-old male was seen in our Emergency Department with right lower leg swelling 15 days after coronary stent implantation performed using right femoral artery access. Computed tomographic (CT) scanning revealed a large hematoma (45 mm in its longest diameter) compressing the common femoral vein and with DVT from the right external iliac vein to the popliteal vein. Due to the extensive DVT involvement, we decided to release the compressed common femoral vein by surgical evacuation of the large hematoma. However, even following evacuation of the hematoma, as the DVT did not resolve soon, further mechanical thrombectomy and catheter-directed thrombolysis were performed. Angiography then showed nearly resolved DVT, and the leg swelling was improved. The patient was discharged with the anticoagulation medication, warfarin.