• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 추계학술대회 논문집
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• pp.223-224
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• 2006

• Journal of Korean Neurosurgical Society
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• 제51권4호
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• pp.227-229
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• 2012

Iatrogenic vascular injuries during lumbar disc surgery may occur rarely but they are serious complications, which can be fatal without appropriate management Prompt diagnosis and management of these complications are imperative to prevent a desperate outcome. A 72-year-Old female with proximal left common iliac artery iatrogenic injury during lumbar discectomy was successfully treated by percutaneous deployment of a stent graft in an emergency setting. Postprocedural angiogram demonstrated complete exclusion of the iliac artery laceration. The patient became hemodynamically stable. Two weeks later she complained of vascular claudication. Follow-up angiography revealed decreased arterial flow in the opposite common iliac artery. An additional kissing stent was inserted into the right common iliac artery and the symptoms of vascular claudication disappeared. Endovascular stenting offers a safe and effective method for the treatment of an iatrogenic arterial laceration, particularly in a critical condition. But, the contralateral iliac arterial flow should be kept intact in case of proximal iliac artery injury. Otherwise, additional treatments may be needed.

• Journal of Chest Surgery
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• 제25권7호
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• pp.732-735
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• 1992

We experienced a case of application of Gianturco Self-Expendable Metal vascular stent for S V.C. syndrome at the postoperative stae of pneumonectomy for Lung cancer[Squamous cell carcinoma, stage IIIa] Placement was performed under fluoroscopic guidance. Clinical problem for patient was resolved satisfactorily Long-term follow-up is required to determine restenosis, complication, and recurrence of cancer, etc.

• 폴리머
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• 제35권5호
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• pp.483-487
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• 2011

효율적 비혈관용 약물방출 스텐트 제조를 위해 풀루란 아세테이트(pullulan acetate, PA)가 테프론(poly-tetrafluorethylene; PTFE)으로 피막된 스텐트(PTFE-stent)의 코팅재료로 연구되었다. 파크리탁셀 함유 PA가 코팅된 PTFE-stent의 표면, 약물 방출 거동, 세포독성이 측정되었으며, 동물실험을 통해 이의 가능성이 검토되었다. 전자현미경으로 표면을 관찰한 결과 표면이 PTFE 피막에 비해 훨씬 매끄러웠고, 약물은 80일 동안 서방적 방출 거동을 보였다. PA와 함께 코팅된 파크리탁셀의 안정성을 annexin V 결합 염색법을 통하여 측정한 결과 apoptosis의 비율이 천연 파크리탁셀과 유사한 것으로 보아 봉입된 파크리탁셀의 변성이 없음을 알 수 있었다. 소동물 실험에서는 파크리탁셀이 봉입된 PA-PTFE가 고형암의 성장을 억제하였다. 위의 결과로 보아 PA는 효율적 비혈관계 약물방출 스텐트 개발에 매우 유용한 물질이라고 기대된다.

• Journal of Korean Neurosurgical Society
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• 제46권3호
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• pp.261-264
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• 2009

Vascular injury during lumbar disc surgery is a rare but potentially life-threatening complication. It has been managed by open vascular surgical repair. With recent technologic advance, endovascular treatment became one of effective treatment modalities. We present a case of a 32-year-old woman who suffered with common iliac artery injury during lumbar disc surgery that was treated successfully by endovascular repair with temporary balloon occlusion and subsequent insertion of a covered stent. Temporary balloon occlusion for 1.5 hours could stop bleeding, but growing pseudoaneurysm was identified at the injury site during the following 13 days. It seems that the temporary balloon occlusion can stall bleeding from arterial injury for considerable time duration, but cannot be a single treatment modality and requires subsequent insertion of a covered stent.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2011년도 춘계학술대회 논문집
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• pp.507-508
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• 2011

• 센서학회지
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• 제30권3호
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• pp.165-169
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• 2021

The objective of this study was to fabricate a novel hydrophobic stent for reducing restenosis by employing electron beam equipment. The stent was fabricated from a CoCr alloy tube by using a femtosecond laser and was treated with argon plasma. Subsequently, the stent's surface specification changed from hydrophilic to hydrophobic. Application of the electron beam offers several advantages such as a short processing time, whole surface reforming, and enhancement of material properties. As the surface of the stent was rendered hydrophobic, it can provide equivalent or enhanced mechanical properties and greater functionality with a higher radial force at the extended stent in a blood vessel. The obtained results corresponding to the mechanical properties indicate that the contact angle increased to approximately 130°, and the radial force increased to approximately 3 N. Furthermore, cell culture experiments were conducted for verifying whether cells were cultured on the surface-modified CoCr surface. Based on the obtained results, it is believed that an effective reduction in the restenosis of inserted vascular stents is possible.

• Journal of Trauma and Injury
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• 제29권4호
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• pp.172-175
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• 2016

Penetrated injury of common carotid artery (CCA) is rare and extremely lethal. Carotid artery injury tends to bleed actively and potentially occlude the trachea. It can cause fatal neurological complications. An accurate diagnosis and adequate treatment are very needed to the successful outcome of the penetrating vascular injury in zone 1, 2, and 3 of the neck. Open surgical treatment is more invasive and complicated than endovascular treatment. We experienced a case with penetrating injury in neck zone 2. Here, we report the case successfully treated with endovascular stent graft technique.

• Journal of Korean Neurosurgical Society
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• 제40권1호
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• pp.28-30
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• 2006

Two patients presented with amaurosis fugax[AMF]. despite treatment with antiplatelet drugs and anticoagulants due to previous transient ischemic attacks. Angiography demonstrated severe stenosis in the cavernous and petrous internal carotid artery[ICA] respectively, with reduced flow in the ophthalmic artery[OA]. Endovascular stent placement in both patients resulted in normalization of the vessel lumen of the stenotic vessel segments. In addition, complete restoration of OA flow was noted immediately after stenting. Both patients showed no further episode of AMF over a follow-up period of 38 and 23 months respectively. Our clinical and angiographic findings suggest that hemodynamic Insufficiency in retinal vasculature caused by a stenosis of the cavernous or petrous ICA can be treated successfully by endovascular stent.

• Biomaterials and Biomechanics in Bioengineering
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• 제1권3호
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• pp.131-150
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• 2014

Vascular stenting has a great attention as a treatment for coronary arteries diseases as compared with percutaneous balloon angioplasty. In-stent restenosis and thrombosis are side effects resulting from using bare metal stent (BMS). Employing platelet therapy allowed to reduce the rate of thrombosis, however, the rate of restenosis remains a major problem. In 2002, drug-eluting stents (DESs) were introduced as an effort to reduce the restenosis. The commercially available DESs continue to suffer from coating defects that might lead to a series of adverse effects. Most importantly, multiple concerns remain regarding the polymer coating integrity on metal surfaces or the relation of polymer irregularities to longterm adverse events.