Byung Moon Kim

Dongguk University, Sŏul, Seoul, South Korea

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Publications (93)214.02 Total impact

  • Joohee Jeong · Seog-Hoon Rim · Byung Moon Kim ·
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    ABSTRACT: Cauchy polynomials are also called Bernoulli polynomials of the second kind and these polynomials are very important to study mathematical physics. Kim et al. have studied some properties of Bernoulli polynomials of the second kind associated with special polynomials arising from umbral calculus. Kim introduced the degenerate Cauchy numbers and polynomials which are derived from the degenerate function e t . In this paper, we try to degenerate Cauchy numbers and polynomials k-times and investigate some properties of these k-times degenerate Cauchy numbers and polynomials. MSC: 11B68, 11S40, 11S80.
    Advances in Difference Equations 12/2015; 2015(1). DOI:10.1186/s13662-015-0663-8 · 0.64 Impact Factor
  • Byung Moon Kim · Lee-Chae Jang ·
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    ABSTRACT: Recently, the Von Staudt-Clausen theorem for q-Euler numbers was introduced by Kim (Russ. J. Math. Phys. 20(1):33-38, 2013) and Araci et al. have also studied this theorem for q-Genocchi numbers (see Araci et al. in Appl. Math. Comput. 247:780-785, 2014) based on the work of Kim et al. In this paper, we give the corresponding Von Staudt-Clausen theorem for the weighted q-Genocchi numbers and also prove the Kummer-type congruences for the generated weighted q-Genocchi numbers. MSC: 11B68, 11S40.
    Advances in Difference Equations 12/2015; 2015(1). DOI:10.1186/s13662-014-0340-3 · 0.64 Impact Factor
  • Jin Woo Kim · Byung Moon Kim · Keun Young Park · Dong Joon Kim · Dong Ik Kim ·
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    ABSTRACT: Background: Utilization of a dual-lumen balloon may improve Onyx penetration into isolated dural arteriovenous fistulas (i-DAVFs). Objective: To compare the results of Onyx embolization using a dual-lumen balloon with those using a non-balloon catheter for i-DAVFs. Methods: Twenty-nine patients underwent Onyx embolization for i-DAVFs using a non-balloon (n = 14) or a dual-lumen balloon catheter (n = 15). Since its introduction, a dual-lumen balloon catheter has been preferred. We compared the dual-lumen balloon group with the non-balloon catheter group regarding angiographic outcome, treatment-related complications, total procedural time, Onyx injection time, and the number of feeders requiring embolization. Results: The dual-lumen balloon group showed complete occlusion of i-DAVFs in 13 and near-complete in 2 patients, while the non-balloon group showed complete occlusion in 5, near-complete in 5, and incomplete in 4 patients (P < .05). Treatment-related complications occurred in 2 patients: 1 in the non-balloon group and 1 in the dual-lumen balloon group. The mean total procedural time was 62 ± 32 minutes in the dual-lumen balloon and 171 ± 88 minutes in the non-balloon group (P < .05). The mean Onyx injection time was 10 ± 6 minutes in the dual-lumen balloon and 49 ± 32 minutes in the non-balloon group (P < .05). The median number of feeders requiring embolization was 1 (range, 1-3) in the dual-lumen balloon and 2 (range, 1-4) in the non-balloon group (P < .05). Conclusion: Utilization of a dual-lumen balloon catheter for Onyx embolization of i-DAVF seemed to significantly increase the immediate complete occlusion rate and decrease total procedural time, Onyx injection time, and number of feeders requiring embolization. ABBREVIATION:: i-DAVFs, isolated dural arteriovenous fistulas.
    Neurosurgery 10/2015; DOI:10.1227/NEU.0000000000001069 · 3.62 Impact Factor
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    ABSTRACT: Treatment strategy for acute arterial occlusions due to intracranial atherosclerotic disease (IAD) may differ from those due to embolism (embolic). The aims were to differentiate and classify angiographically defined occlusion due to IAD versus embolism and identify baseline clinical factors associated with IAD-related occlusion. Acute ischemic stroke patients with large cerebral artery occlusions on computed tomography angiography who underwent transfemoral cerebral angiography for endovascular treatment were included. Patients were categorized as the embolic (no evidence of focal stenosis after recanalization) or IAD group (significant fixed focal stenosis in the occlusion site, evidenced in the final angiography or during the endovascular treatment procedure) based on transfemoral cerebral angiography findings. In total, 158 patients were included. The IAD group patients (n = 24) were younger (P = .005), more often male (P < .001) and smokers (P < .001), and had a higher total cholesterol level (P = .001) than patients in the embolic group (n = 134). The posterior circulation was more frequently involved in the IAD group (P = .001). Independent predictors of IAD on multivariable analysis were male sex (odds ratio, 6.42 [95% confidence interval, 1.25-32.97], P = .026), posterior circulation involvement (3.57 [1.09-11.75], P = .036), and high total cholesterol levels (1.02 [1.01-1.03], P = .008). Male sex, hypercholesterolemia, and posterior circulation involvement are associated with higher likelihood of underlying IAD as the etiology for the intracranial arterial occlusion. In patients with these characteristics, underlying IAD may have to be considered and the endovascular treatment strategy may have to be modified. Copyright © 2015 National Stroke Association. Published by Elsevier Inc. All rights reserved.
    Journal of stroke and cerebrovascular diseases: the official journal of National Stroke Association 07/2015; 24(9). DOI:10.1016/j.jstrokecerebrovasdis.2015.05.003 · 1.67 Impact Factor
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    Jang Hyun Baek · Byung Moon Kim ·
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    ABSTRACT: Symptomatic vertebral artery (VA) stenosis associated with bilateral carotid rete mirabile (CRM) has not been reported. We report the long-term clinical and angiographic outcome after stenting for symptomatic VA stenosis in the patient with bilateral CRM. This report is the first case that symptomatic VA stenosis associated with bilateral CRM was treated with stenting.
    Korean journal of radiology: official journal of the Korean Radiological Society 05/2015; 16(3):678-81. DOI:10.3348/kjr.2015.16.3.678 · 1.57 Impact Factor
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    ABSTRACT: Background: Stent retriever has a distinct ability to restore blood flow temporarily before achieving final reperfusion. There has been a limited report regarding the clinical impact of it. We investigated if temporary opening of occluded vessels using a stent retriever before final reperfusion might improve clinical outcome in acute ischemic stroke patients who received the endovascular reperfusion treatment. Methods: We enrolled consecutive ischemic stroke patients who had an initial occlusive lesion in the anterior circulation and achieved final reperfusion (Thrombolysis In Cerebral Infarction [TICI] ≥2) by endovascular treatment. Temporary opening was defined as the presence of ante grade flow (TICI≥2) during deployment of a stent retriever. Favorable outcome was defined as a modified Rankin scale score≤2 at 90 day. Results: A total of 98 patients were included in the study and temporary opening was achieved in 49 (50%). Temporary opening was associated with favorable outcome (odds ratio, 7.825; 95% confidence interval, 1.592-38.461; p = 0.011) in the multivariate analysis. The probability of having a favorable outcome tended to decrease as time from onset to final reperfusion increased in patients without temporary opening. However, this trend was not evident in the patient with temporary opening. The beneficial effect of temporary opening on clinical outcome seemed to be present in patients with good collaterals but not in patients with poor collaterals. Conclusions: Temporary opening of occluded vessel using a stent retriever may be beneficial for improving clinical outcome in acute ischemic stroke patients.
    PLoS ONE 04/2015; 10(4):e0124551. DOI:10.1371/journal.pone.0124551 · 3.23 Impact Factor
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    Woong Yoon · Byung Moon Kim · Dong Joon Kim · Dong Ik Kim · Seul Kee Kim ·
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    ABSTRACT: BACKGROUND: The optimal treatment for hyperacute stroke attributable to cervical internal carotid artery (C-ICA) occlusion remains controversial. OBJECTIVE: This study sought to evaluate clinical outcomes and prognostic factors after carotid artery stenting (CAS) in patients with hyperacute stroke within 6 hours of onset. METHODS: Forty-seven patients with hyperacute stroke attributable to atherosclerotic C-ICA occlusion underwent emergent CAS. Forty-two patients (89.4%) had tandem intracranial artery occlusion (TIO). When patients showed remnant M1 or proximal M2 occlusions after CAS, intracranial recanalization therapy was performed by using pharmacologic thrombolysis and mechanical thrombectomy with a Solitaire stent. Clinical and radiologic data were compared between patients with favorable (modified Rankin scale, 0-2) and unfavorable outcomes. Binary logistic regression analysis was used to find independent prognostic factors. RESULTS: Emergent CAS was successful in all but 1 patient. Seven (16.7%) of 42 patients with TIO did not need further treatment, because thrombolysis in cerebral ischemia >= 2b was achieved immediately after CAS. Of the 35 patients who underwent intracranial recanalization therapy for remnant TIO, thrombolysis in cerebral ischemia >= 2b was achieved in 71.4% (25 of 35). Twenty-six patients (55.3%) had favorable outcomes, and mortality was 6.4% at 3 months. Time from symptom onset to carotid recanalization was inversely and independently associated with a favorable outcome for all patients and for those with TIO (P< .05). CONCLUSION: In our patient group, emergent CAS for hyperacute stroke caused by atherosclerotic C-ICA occlusion seemed to be effective and safe. Time to carotid recanalization was inversely and independently associated with a favorable outcome.
    Neurosurgery 01/2015; 76(3). DOI:10.1227/NEU.0000000000000610 · 3.62 Impact Factor
  • Dong Joon Kim · Byung Moon Kim · Sang Hyun Suh · Dong Ik Kim ·
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    ABSTRACT: The prognosis of ischemic anterior circulation intracranial dissection (AC-ICD) is poor and its optimal management is still controversial. To evaluate the safety and efficacy of a self-expanding stent for ischemic AC-ICD. Eight patients (mean age, 36 years) underwent self-expanding stenting for ischemic AC-ICD. Imaging findings of ischemic AC-ICD, the reason for stenting, and the clinical and angiographic outcomes were retrospectively evaluated. AC-ICD involved intracranial internal carotid artery to middle cerebral artery (MCA) in 2, intracranial internal carotid artery alone in 3, and MCA alone in 3 patients. Six AC-ICDs showed complete or near occlusions while 2 had a severe degree of stenosis. Six AC-ICDs showed an intimal flap and 3 had intramural hematomas. Six patients underwent emergent stenting for acute stroke within 6 hours (n = 2) or crescendo-type stroke within 24 hours (n = 4), while 2 patients had stenting for recurrent ischemia on dual antiplatelet and/or anticoagulation after the initial attack. The mean dissection-related stenosis improved from 93.1% to 20.3% after stenting (P < .05). The mean National Institutes of Health Stroke Scale score improved from 7.5 to 1.4 (P < .05). All patients had excellent or favorable outcomes at 3 months: modified Rankin Scale score, 0 in 3, 1 in 3, and 2 in 1 patient(s). No patients had subarachnoid hemorrhage or ischemic symptom recurrence during the clinical follow-up (mean, 27 months). All stented arteries were patent without significant in-stent stenosis on angiographic follow-up (range, 3-12 months). Self-expanding stents seem to be safe and effective for AC-ICD presenting with acute/crescendo-type stroke or recurrent ischemia despite adequate medication. CAD, cervical artery dissectionICD, intracranial artery dissection.
    Neurosurgery 12/2014; 76(2). DOI:10.1227/NEU.0000000000000582 · 3.62 Impact Factor
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    ABSTRACT: Object: Internal carotid artery (ICA) rupture during transsphenoidal surgery (TSS) is an extremely difficult complication to treat. This study aimed to evaluate the immediate and long-term outcomes of covered stent placement for emergency reconstruction of ruptured ICAs during or after TSS. Methods: Seven patients underwent covered stent placement for emergency reconstruction of a ruptured ICA during or after TSS. The safety and effectiveness of covered stent placement for emergency reconstruction of ruptured ICAs were retrospectively analyzed. Results: Pretreatment angiography showed active bleeding in 6 patients (5 intraoperative and 1 postoperative) and a pseudoaneurysm in 1 patient. Of the 6 patients with active bleeding, 5 were treated with a successive operation to control active bleeding. The other patient was treated just after cardiopulmonary resuscitation due to massive nasal bleeding 20 days after revision of TSS. All active bleeding was controlled immediately after covered stent insertion in these 6 patients. One patient showed a gap between the covered stent and ICA wall without active bleeding 30 minutes after glycoprotein IIb/IIIa inhibitor administration due to in-stent thrombosis. The gap was occluded with coil embolization after completion of the temporarily suspended TSS. The seventh patient, whose ICA tear was treated with surgical suture, underwent covered stent placement for a pseudoaneurysm detected on postoperative Day 2. During a mean follow-up period of 46 months (range 12-85 months), all patients had excellent outcomes (modified Rankin Scale score of 0). All the stented ICAs were patent on vascular imaging follow-up at a mean of 34 months (range 12-85 months). Conclusions: Covered stents appear to be a safe and effective option for emergency reconstruction of ruptured ICAs during or after TSS.
    Journal of Neurosurgery 11/2014; 122(5):1-6. DOI:10.3171/2014.10.JNS14328 · 3.74 Impact Factor
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    ABSTRACT: The CCQM-K82 comparison was designed to evaluate the degrees of equivalence of NMI capabilities for methane in air primary reference mixtures in the range (1800-2200) nmol mol-1. The balance gas for the standards was either scrubbed dry real air or synthetic air. CH4 in air standards have been produced by a number of laboratories for many years, with more recent developments focused on standards at atmospheric measurement concentrations and aimed at obtaining agreement between independently produced standards. A comparison of the differences in primary gas standards for methane in air was previously performed in 2003 (CCQM-P41 Greenhouse gases. 1 and 2) with a standard deviation of results around the reference value of 30 nmol mol-1 and 10 nmol mol-1 for a more limited set of standards. This can be contrasted with the level of agreement required from field laboratories routinely measuring atmospheric methane levels, set by Data Quality Objectives (DQO) established by the World Meteorological Organization (WMO) to reflect the scientifically desirable level of compatibility for CH4 measurements at the global scale, currently set at 2 nmol mol-1 (1 sigma). The measurements of this key comparison took place from May 2012 to June 2012. Eight laboratories took part in this comparison coordinated by the BIPM and NIST. Key comparison reference values were calculated based on Cavity Ring Down Spectroscopy Measurements performed at the BIPM, combined with participant’s gravimetric values to identify a consistent set of standards. Regression analysis allowed predicted values for each standard to be calculated which acted as the KCRVs. In this comparison reported standard uncertainties by participants ranged from 0.50 nmol/mol to 2.4 nmol/mol and the uncertainties of individual KCRVs ranged from 0.68 nmol/mol to 0.71 nmol/mol. The standard deviation of the ensemble of standards about the KCRV value was 1.70 nmol/mol. This represents a greater than tenfold improvement in the level of compatibility of methane in air standards compared to that demonstrated in 2003. Further improvements in the compatibility of standards will require improved methods and uncertainties for the measurement of trace level methane in balance gases.
    Metrologia 11/2014; DOI:10.1088/0026-1394/52/1A/08001 · 2.04 Impact Factor
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    Kwon-Duk Seo · Kyung-Yul Lee · Byung Moon Kim · Sang Hyun Suh ·
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    ABSTRACT: We report a case of delayed cerebral infarction due to stent longitudinal folding deformation following carotid artery stenting using a self-expandable stent with an open-cell design. The stented segment of the left common carotid artery was divided into two different lumens by this folding deformation, and the separated lumens became restricted with in-stent thrombosis. Although no established method of managing this rare complication exists, a conservative approach was taken with administration of anticoagulant and dual antiplatelet therapy. No neurological symptoms were observed during several months of clinical follow-up after discharge.
    Korean journal of radiology: official journal of the Korean Radiological Society 11/2014; 15(6):858-61. DOI:10.3348/kjr.2014.15.6.858 · 1.57 Impact Factor
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    ABSTRACT: The purpose of this paper was to estimate the reduction efficiency of an abatement system for perfluorocarbon (PFC) gases produced during semiconductor manufacturing processes. The reduction efficiency currently used in the semiconductor industry, the destruction and removal efficiency (DRE), considers only the destruction ratio of PFC gases. A method estimating the reduction efficiency, which in addition to measure the destruction ratio also considers the energy consumption and byproducts produced during the treatment of PFC gases, was proposed in this paper; this efficiency was defined as the net reduction efficiency (NRE). For the estimation of the reduction efficiency, measurements were made using a plasma-wet type abatement system installed in an actual semiconductor manufacturing plant. The destruction ratio of the PFC gases was measured using Fourier transform infrared spectroscopy and quadrupole mass spectroscopy. The energy consumption was measured using an electricity meter. Based on these measurements, the DRE and the NRE of the PFC gases were calculated and compared. The results indicated that the DRE showed high reduction efficiency while the NRE showed lower values.
    IEEE Transactions on Semiconductor Manufacturing 11/2014; 27(4):456-461. DOI:10.1109/TSM.2014.2362942 · 1.00 Impact Factor
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    ABSTRACT: Background and purpose: Little is known about high-signal lesions in magnetic resonance diffusion-weighted imaging (DWI [+]) after stenting for intracranial atherosclerotic stenosis. This study aimed to evaluate the incidence, distribution, risk factors, and clinical implications of DWI (+) after intracranial stenting. Methods: A total of 123 patients (male:female=88:35, mean age, 64.1 years) with symptomatic intracranial atherosclerotic stenosis (mean stenosis, 76.1±7.7%) underwent both stenting and poststenting DWI. The incidence, distribution (embolic-alone versus stenosis-associated perforator/mixed), and risk factors of DWI (+) and its relationship with symptomatic ischemic complications (SIC, including stroke or transient ischemic attack) were retrospectively evaluated. Results: Forty-three patients (35.0%) had DWI (+). Middle cerebral artery, smaller distal parent artery, and treatment-related dissection were independent risk factors for DWI (+) (P<0.05). SIC occurred in 4 patients (3.3%), all of whom had DWI (+). Of the patients with DWI (+), neither the number nor the volume of DWI (+) differed significantly between SIC and asymptomatic patients: median number/patient, 3.5 (range, 2-11) versus 2.0 (range, 1-11) and median volume/patient, 329.8 mm(3) (range, 76-883.5 mm(3)) versus 119.5 mm(3) (range, 32.5-873.0 mm(3)). However, SIC occurred more frequently in the stenosis-associated perforator/mixed type (3/11, 27.3%) than in the embolic-alone type (1/32, 3.1%; P<0.05). Conclusions: The incidence of DWI (+) after intracranial stenting for intracranial atherosclerotic stenosis was 35.0%. Middle cerebral artery, smaller distal parent artery, and treatment-related dissection were independent risk factors for DWI (+). SIC occurred more frequently in the stenosis-associated perforator/mixed type than in the embolic-alone type.
    Stroke 10/2014; 45(11). DOI:10.1161/STROKEAHA.114.006182 · 5.72 Impact Factor
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    ABSTRACT: BACKGROUND AND PURPOSECoil packing density (PD) can be calculated via a formula (PDF) or software (PDS). Two types of PD can be different from each other for same aneurysm. This study aimed to evaluate the interobserver agreement and relationships between the 2 types of PD relative to aneurysm size.METHODS Consecutive 420 saccular aneurysms were treated with coiling. PD (PDF, [coil volume]/[volume calculated by formula] and PDS, [coil volume]/[volume measured by software]) was calculated and prospectively recorded. Interobserver agreement was evaluated between PDF and PDS. Additionally, the relationships between PDF and PDS relative to aneurysm size were subsequently analyzed.RESULTSInterobserver agreement for PDF and PDS was excellent (Intraclass correlation coefficient, PDF; 0.967 and PDS; 0.998). The ratio of PDF and PDS was greater for smaller aneurysms and converged toward 1.0 as the maximum dimension (DM) of aneurysm increased. Compared with PDS, PDF was overestimated by a mean of 28% for DM < 5 mm, by 17% for 5 mm ≤ DM < 10 mm, and by 9% for DM ≥ 10 mm (P < 0.01).CONCLUSIONS Interobserver agreement for PDF and PDS was excellent. However, PDF was overestimated in smaller aneurysms and converged to PDS as aneurysm size increased.
    Journal of neuroimaging: official journal of the American Society of Neuroimaging 07/2014; 25(3). DOI:10.1111/jon.12140 · 1.73 Impact Factor
  • Pyoung Jeon · Byung Moon Kim · Dong Joon Kim · Dong I K Kim · Keun Young Park ·
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    ABSTRACT: Background: This study aimed to evaluate clinical and angiographic outcomes of Y-configuration double-stent-assisted (Y-stent) coiling using two closed-cell stents for wide-necked basilar tip aneurysm (BTA). Materials: A total of 25 patients underwent Y-stent coiling using two closed-cell stents as a first-time treatment in 18 (3 ruptured) BTAs, retreatment in 2 BTAs and as a third treatment in 5 wide-necked BTAs. Clinical and angiographic outcomes were evaluated retrospectively. Results: Treatment-related complications were three (12.0 %) thromboembolic infarctions due to two acute in-stent thromboses and one embolism. Twenty-two (88 %) patients had favorable outcomes (modified Rankin scale score [mRS], 0-2) during the follow-up period (mean, 30 months; range, 6-54 months). Two patients died: one from initial subarachnoid hemorrhage and the other from intracerebral hemorrhage due to underlying Moyamoya disease. Post-treatment angiograms showed complete occlusion in nine aneurysms, residual neck in 11 aneurysms and residual sac in five aneurysms. Follow-up angiograms were available at least once between 5 to 34 months (mean, 16 months) in 21 patients. Nineteen patients showed improved or stable states (complete occlusion, n = 17; residual neck, n = 2). Major recurrences occurred in two BTAs (9.5 %). Those two major recurrent aneurysms had been large-sized aneurysms at the initial coiling procedure. Both showed not only coil compaction but also progressive growth to giant-sized aneurysms and intra-aneurysmal thrombus formation at the Y-stent coiling as a third-time treatment. Conclusions: Y-stent coiling using two closed-cell stents is a safe and durable treatment option for wide-necked BTA, but may have limited efficacy for large/giant sized and thrombosed aneurysms.
    Acta Neurochirurgica 06/2014; 156(9). DOI:10.1007/s00701-014-2163-0 · 1.77 Impact Factor

  • Acta Neurochirurgica 06/2014; 156(9). DOI:10.1007/s00701-014-2152-3 · 1.77 Impact Factor
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    ABSTRACT: Overwide and undertall small intracranial aneurysms remain a challenge for coil embolization. The purpose of this study is to evaluate the feasibility and results of intrasaccular double microcatheter endovascular coil embolization of overwide and undertall small intracranial aneurysms. Small (<7 mm), overwide (dome-to-neck ratio [DNR] ≤1.2), and undertall (ASPECT ratio ≤1.2) aneurysms which were treated with double microcatheter technique were selected. For the double microcatheter technique, two microcatheters were selected simultaneously into the aneurysm sac and coil insertion was performed alternatingly. The initial results, ASPECT, DNR ratios, complications, and follow-up results were assessed. Twenty small (mean, 3.8 mm), overwide (mean DNR, 1.1), and undertall (mean ASPECT, 1.0) aneurysms were treated with the double microcatheter technique. Overall, complete or near complete occlusion was achieved in 19/20 cases. This was achieved with only the double microcatheter technique in 16/20 cases (ASPECT mean, 1.0; DNR mean, 1.1). Adjuvant balloon remodeling was performed in 4/20 cases (ASPECT mean, 0.8; DNR mean, 1.1). The ASPECT ratio was significantly lower in the adjuvant balloon remodeling cases (p = 0.027). Coiling failed in one patient with both DNR and ASPECT ratio <1.0. Overall, one patient developed a focal visual field defect after the procedure. No other patients developed neurologically significant complications. Double microcatheter technique may be a safe and effective method for the treatment of overwide and undertall small intracranial aneurysms.
    Acta Neurochirurgica 03/2014; 156(5). DOI:10.1007/s00701-014-2049-1 · 1.77 Impact Factor
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    ABSTRACT: The purpose of this study was to compare clinical outcomes and treatment-related complications between coiling and clipping for ruptured distal anterior cerebral artery (DACA) aneurysms. Eighty-four consecutive patients (M:F = 36:48; mean 53.8 years) with ruptured DACA aneurysms were treated by either clipping (n = 46, 54.8%) or coiling (n = 38, 45.2%). The clinical outcomes and procedure-related complications were evaluated and compared between the two groups. Procedure-related complications tend to occur more frequently in the clipping (n = 6, 13.0%) than coiling group (n = 1, 2.6%) (P = .121). At discharge, 51 patients (60.7%) had favorable outcomes (Glasgow outcome scale [GOS], 4 or 5). There was no significant difference between the two groups in favorable outcome (63.2% vs. 58.7%; P = .677). Hunt and Hess (HH) grade (P < .001; 95% CI, 3.354-29.609) and treatment modality (P = .044; 95% CI, 1.039-16.325) were independent risk factors for poor outcome (GOS, 1-3). Coiling was more favorable to clipping in clinical outcomes and incidence of treatment-related complications for ruptured DACA aneurysms.
    Journal of neuroimaging: official journal of the American Society of Neuroimaging 12/2013; 25(1). DOI:10.1111/jon.12073 · 1.73 Impact Factor
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    ABSTRACT: Coil embolization of wide-necked or fusiform vertebrobasilar aneurysms is challenging and tends to involve frequent recanalization. The aim of our study was to evaluate complications and mid-term outcomes of complex vertebrobasilar artery aneurysms after stent-assisted coiling with various techniques. We retrospectively evaluated 28 cases of unruptured vertebrobasilar aneurysm treated by stent-assisted coiling. Forty-four of the 45 stents placed in 28 patients were deployed at the desired location (97.8 %). Single stent-assisted coiling was performed in 14 aneurysms, a stent-within-a-stent (SWS) technique was used in 12 aneurysms, and Y-stent-assisted coiling was employed in four basilar tip aneurysms. Two basilar tip aneurysms treated by single stent-assisted coiling recurred and were retreated by SWS and Y-stent-assisted coiling. Complete embolization was achieved in 19 aneurysms (67.8 %), and remnant neck persisted in eight aneurysms (28.6 %) and remnant aneurysm was noted in one aneurysm (3.6 %). Permanent neurologic deficit (Modified Rankin Scale 1 and 4) was noted in two patients (7.1 %). Angiographic follow-up (mean follow-up period: 20.8 months) was performed in 20 patients. Major recanalization occurred in two basilar tip aneurysms (10 %) and minor compaction was noted in one superior cerebellar artery aneurysm. The remaining 17 aneurysms were stable or improved (85 %). Complex vertebrobasilar aneurysm embolization with stent-assisted techniques was effective and feasible as a method for reducing recanalization during midterm angiographic follow-up. Large and wide-necked basilar tip aneurysms showed frequent major recanalization, and compact packing with single or Y-stent-assisted coiling is needed to prevent recanalization even if coiling will be done without stenting.
    Acta Neurochirurgica 10/2013; 155(11). DOI:10.1007/s00701-013-1866-y · 1.77 Impact Factor
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    Myung Ho Rho · Byung Moon Kim · Sang Hyun Suh · Dong Joon Kim · Dong Ik Kim ·
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    ABSTRACT: A new double-lumen balloon catheter was being developed for the treatment of cerebral aneurysms. The purpose of this study is to report our initial experience of a double-lumen balloon catheter for the treatment of wide-necked aneurysms. Seventeen patients (mean age, 63 years; range, 45-80 years) with wide-necked, with or without a branch-incorporated aneurysms, (10 ruptured and 9 unruptured) were treated with balloon-assisted coil embolization using a double-lumen balloon catheter (Scepter C™ or Scepter XC™) for 7 months after being introduced to our country. Locations of the aneurysms were posterior communicating artery (n = 7), anterior communicating artery or A2 (n = 7), middle cerebral artery (MCA) bifurcation (n = 3), basilar artery tip (n = 1) and anterior choroidal artery (n = 1). The initial clinical and angiographic outcomes were retrospectively evaluated. Coil embolization was successfully completed in all 19 aneurysms, resulting in complete occlusions (n = 18) or residual neck (n = 1). In one procedure, a thrombus formation was detected at the neck portion of the ruptured MCA bifurcation aneurysm near to the end of the procedure. It was completely resolved with an intra-arterial infusion of Glycoprotein IIb/IIIa inhibitor (Tirofiban, 1.0 mg) without any clinical sequela. There were no treatment-related events in the remaining 18 aneurysms. At discharge, functional neurological state improved in 11 patients (10 patients with ruptured aneurysm and 1 with unruptured aneurysm presenting with mass symptoms) and 6 patients with unruptured aneurysms had no newly developed symptoms. In this preliminary case series, the newly developed double-lumen Scepter balloon appears to be a safe and convenient device for coil embolization of wide-necked aneurysms.
    Korean journal of radiology: official journal of the Korean Radiological Society 09/2013; 14(5):832-40. DOI:10.3348/kjr.2013.14.5.832 · 1.57 Impact Factor

Publication Stats

874 Citations
214.02 Total Impact Points


  • 2011-2015
    • Dongguk University
      Sŏul, Seoul, South Korea
    • Catholic University of Korea
      Sŏul, Seoul, South Korea
  • 2010-2015
    • Wonju Severance Christian Hospital
      Genshū, Gangwon-do, South Korea
  • 2009-2015
    • Yonsei University
      Sŏul, Seoul, South Korea
  • 2010-2014
    • Yonsei University Hospital
      • Department of Internal Medicine
      Sŏul, Seoul, South Korea
  • 2008-2014
    • Korea Research Institute of Standards and Science
      • Gas Analysis Center
      Daiden, Daejeon, South Korea
    • Sungkyunkwan University
      Sŏul, Seoul, South Korea
  • 2006-2009
    • Kangbuk Samsung Hospital
      Sŏul, Seoul, South Korea
  • 2004-2008
    • Seoul National University
      • College of Pharmacy
      Sŏul, Seoul, South Korea
  • 2005-2007
    • Ajou University Medical Center
      수원시, Gyeonggi-do, South Korea
    • Ajou University
      Sŏul, Seoul, South Korea
  • 2001
    • Kyungil University
      Sŏul, Seoul, South Korea