• Journal of Korean Neurosurgical Society
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• v.51 no.6
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• pp.370-373
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• 2012

The intracranial stent functions primarily to prevent protrusion of coils into the parent vessel during the embolization of wide-necked cerebral aneurysms and might also reduce aneurysm recanalization rate. In spite of these advantages, little is known about the long-term interaction of the stent with the parent vessel wall. We present a rare case of severe in-stent stenosis occurring as a delayed complication of Neuroform stent-assisted coil embolization of an unruptured intracranial aneurysm.

• Journal of Korean Neurosurgical Society
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• v.50 no.3
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• pp.248-251
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• 2011

Intracranial pial arteriovenous fistulas (AVFs) are rare vascular lesions of the brain. These lesions consist of one or more arterial connection to a single venous channel without true intervening nidus. A 24-year-old woman visited to our hospital because of headache, vomiting, dizziness and memory disturbance that persisted for three days. She complained several times of drop attack because of sudden weakness on both leg. Cerebral angiograms demonstrated a giant venous aneurysm on right frontal lobe beyond the genu of corpus callosum, multiple varices on both frontal lobes fed by azygos anterior cerebral artery, and markedly dilated draining vein into superior sagittal sinus, suggesting single channel pial AVF with multiple varices. Transarterial coil embolization of giant aneurysm and fistulous portion resulted in complete disappearance of pial AVF without complication.

• Journal of Korean Neurosurgical Society
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• v.56 no.4
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• pp.353-355
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• 2014

We present a unique experience of urgent parent arterial embolization for treatment of an aneurysm of the inferior thyroid artery (ITA) that bled during tracheostomy. The event happened to a 69-year-old female patient with subarachnoid hemorrhage and hospital-acquired pneumonia that required tracheostomy. Abrupt and massive bleeding developed during the procedure, and the source could not be identified. Under manual compression, angiography revealed an 8-mm aneurysm that arose from the inferior thyroid artery. The superselected parent artery of the aneurysm was successfully occluded with a single pushable coil. The patient's postoperative course was uneventful.

• Journal of Veterinary Clinics
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• v.28 no.2
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• pp.236-239
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• 2011

A 10 month-old female (intact) Maltese dog was presented due to continuous heart murmur. The dog was diagnosed with patent ductus arteriosus (PDA) based on two-dimensional echocardiography, computed tomography (CT) and angiography. Transarterial coil embolization was used for transcatheter occlusion of the PDA. A single coil was placed successfully and effectively occluded the blood flow through the ductus. Continuous heart murmur disappeared immediately the coil placement and no residual flow was detected. Complications and safety following the procedure were evaluated regularly based on clinical signs, cardiac examinations and serum troponin-I concentrations. This is the first clinical application of coil embolization for transcatheter closure of PDA in a dog in Korea.

• The Journal of the Korea Contents Association
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• v.12 no.7
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• pp.247-254
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• 2012

This study presents the assessment results of coil length characteristics according to the volume of cerebral artery among the inpatients that received angiography and coil embolization following intracranial aneurysm from March, 2010 to September 2011. The volume rendering method was applied to the patients that received embolization to their cerebral arteries to obtain volume measurements. After coil embolization, the volume ratios were calculated with the volumes and lengths of coils. The embolic volume ratios were $43.11{\pm}3.11%$, $36.07{\pm}2.03%$, 40.91%, and 38.25% when the aneurysm sizes were 6mm or less, 6~10mm, 10~15mm and 20mm or more, respectively, being similar to the recommended volume ratios. Regardless of the types of aneurysm, the coil length according to volume was 0.65cm per $1mm^3$ of 20~$100mm^3$ when one type of 0.25mm diameter coil was used. They were 0.62cm per $1mm^3$ of 20~$150mm^3$ when one type of coil was used in the aneurysm volume of the saccular type and 0.60cm per $1mm^3$ of 20~$90mm^3$ when one type of coil was used in the aneurysm volume of the multi-lobulated type.

• Journal of Korean Neurosurgical Society
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• v.53 no.2
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• pp.112-114
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• 2013

Bilateral abducens nerve palsy related to ruptured aneurysm of the anterior communicating artery (ACoA) has only been reported in four patients. Three cases were treated by surgical clipping. No report has described the clinical course of the isolated bilateral abducens nerve palsy following ruptured ACoA aneurysm obliterated with coil. A 32-year-old man was transferred to our institution after three days of diplopia, dizziness and headache after the onset of a 5-minute generalized tonic-clonic seizure. Computed tomographic angiography revealed an aneurysm of the ACoA. Magnetic resonance imaging showed focal intraventricular hemorrhage without brain stem abnormalities including infarction or space-occupying lesion. Endovascular coil embolization was conducted to obliterate an aneurysmal sac followed by lumbar cerebrospinal fluid (CSF) drainage. Bilateral paresis of abducens nerve completely recovered 9 weeks after ictus. In conclusion, isolated bilateral abducens nerve palsy associated with ruptured ACoA aneurysm may be resolved successfully by coil embolization and lumbar CSF drainage without directly relieving cerebrospinal fluid pressure by opening Lillequist's membrane and prepontine cistern.

• Tuberculosis and Respiratory Diseases
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• v.78 no.4
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• pp.408-411
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• 2015

Pulmonary arteriovenous malformations (AVMs) are caused by abnormal vascular communications between the pulmonary arteries and pulmonary veins, which lead to the blood bypassing the normal pulmonary capillary beds. Pulmonary AVMs result in right-to-left shunts, resulting in hypoxemia, cyanosis, and dyspnea. Clinical signs and symptoms vary depending on the size, number, and flow of the AVMs. Transcatheter embolization is the treatment of choice for pulmonary AVMs. However, this method can fail if the AVM is large or has multiple complex feeding arteries. Surgical resection is necessary in those kind of cases. Here, we report the case of a patient with a 6-cm pulmonary AVM with multiple feeding arteries that was successfully treated by repeated coil embolization without surgery.

• Journal of Cerebrovascular and Endovascular Neurosurgery
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• v.20 no.4
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• pp.241-247
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• 2018

Treatment of paraclinoid aneurysms weather by surgery, or endovascular embolization has a risk of visual loss due to optic neuropathy, or diplopia due to cranial nerve palsies. Visual complications occur immediately after the clipping, whereas they can occur variable time after endovascular coiling. Recently, endovascular coiling for paraclinoid aneurysm is regarded as a safe and feasible treatment. But it still has risks of acute thromboembolic complication, or cranial nerve palsies. A 45-year-old woman was referred from local hospital to our hospital due to ruptured large ICA dorsal wall aneurysm. A total of 12 coils (195 cm) were used for obliteration of aneurysm. Postoperative diffusion weighted image showed no abnormal signal intensity lesion and magnetic resonance angiography demonstrated no sign of vasospasm, or vessel narrowing. But, she complained visual problem 23 days after coil embolization. Ophthalmologist confirmed the left optic disc atrophy on fundoscopy. Although steroid was started, but monocular blindness did not recover completely. The endovascular embolization of paraclinoid aneurysm, especially projecting superiorly with large irregular shape, has the risk of progressive visual loss because of the proximity to optic nerve.

• Journal of Korean Foot and Ankle Society
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• v.20 no.1
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• pp.43-45
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• 2016

Development of a pseudoaneurysm around the ankle is an uncommon complication after surgery. We experienced a case of a pseudoaneurysm, which developed from the anterior tibial artery. A 44-year-old woman had sustained painful swelling of her right ankle after the removal of implants for a distal fibular fracture. The pseudoaneurysm was confirmed by ultrasonography and angiography. The patient was treated with an intervention using a coil and recovered without further complaints. This case report aims to increase the awareness of this complication with review of literature.

• Journal of the Korean Society of Radiology
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• v.83 no.4
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• pp.887-897
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• 2022

Purpose To evaluate the safety and efficacy of stent-assisted coil embolization (SAC) in acutely ruptured cerebral aneurysms without severe symptoms, and thus, the usefulness of the stent itself in patients with subarachnoid hemorrhages. Materials and Methods From January 2017 to June 2019, 118 patients were treated with coil embolization for acutely ruptured cerebral aneurysms without severe symptoms (Hunt & Hess grade ≤ 3). The periprocedural complications, six-month modified Rankin scores (mRS), and six-month radiologic outcomes were compared between 56 patients with SAC and 62 patients without SAC (non-SAC). Results The rate of good clinical outcomes (mRS ≤ 2), as well as the rate of hemorrhagic and ischemic complications, showed no significant difference between the SAC and non-SAC groups. Moreover, compared to the non-SAC group, the SAC group showed a lower recanalization rate on the six-month follow-up angiogram (20% vs. 39.3%, p = 0.001). Conclusion Although stent use was not significantly associated with clinical outcomes in coil embolization of ruptured cerebral aneurysms with non-severe symptoms (Hunt & Hess grade ≤ 3), it significantly decreased the rate of recanalization on follow-up cerebral angiograms.