Three dimensional measurements of cerebral aneurysms and vessel size

Ohta, Mamoru; Lachenal, Yann; Augsburger, Luca; Abdo, German; Yılmaz, Hasan; Fujimura, Naoko; Babić, Draženko; Lylyk, P; Rüfenacht, Daniel A.

doi:10.1016/s0021-9290(06)84459-3

Cited by 2 publications

(2 citation statements)

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“…Figure 1(a) shows the parameterization of computational models. The dimensions of the parent artery and aneurysm were used as parameters [22][23][24]. The diameter of the parent artery (D) was 4.0 × 10 −3 m and the length (L) was 0.29 m. The radius of curvature (λ) of the parent artery was 6.0 × 10 −3 m and was calculated with a Dean number of 46.…”

Section: Construction Of Saccular Cerebral Aneurysm Modelsmentioning

confidence: 99%

Effect of parent artery expansion by stent placement in cerebral aneurysms

Mori

Hanida

Ohta

et al. 2014

THC

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BACKGROUND: Stent placement for cerebral aneurysms leads to a decrease in blood flow. This occurs not only through the direct obstruction of flow but also by the expansion of the parent artery. The latter has been observed in several clinical studies. OBJECTIVE: The goal of this study was to clarify the effects of parent artery expansion after stent treatment on the following: 1) decrease in blood flow to an aneurysm, 2) wall shear stress (WSS), and 3) oscillatory shear index (OSI). METHODS: The parent artery geometry constructed U-shape. The aneurysm location with respect to the U-shaped parent artery was determined according to previous clinical data. We performed calculations in unsteady-state situations using constructed models. RESULTS: Parent artery expansion with stent reduces blood inflow to an aneurysm and WSS of the aneurysm wall, in addition to increasing OSI. The aneurysm position affects the decrease of the inflow rate and WSS ratio and increases the OSI ratio. Expansion causes the majority of effects on flow reduction inside an aneurysm model. Thus, the expansion effects of all samples should not be neglected. CONCLUSION: These data suggest that parent artery expansion and its effect should be measured and included in the total decrease in blood flow. Parent artery expansion may induce intimal hyperplasia, thus increasing the thickness of the aneurysm wall.

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Section: Construction Of Saccular Cerebral Aneurysm Modelsmentioning

confidence: 99%

Effect of parent artery expansion by stent placement in cerebral aneurysms

Mori

Hanida

Ohta

et al. 2014

THC

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“…3(a), was constructed using Magics software (Magics RP 8.5; Materialise, Leuven, Belgium). The diameter of the main artery was set at 4 mm as a mean of the intracranial artery (15), (16) . A zebra pattern (2 mm long and 2 mm thick) was painted on a catheter [2.9/2.4 Fr (0.96/0.80 mm) Micro catheter, GMA Co., Japan] using an oily marker pen (MO-120-MC-BK, Zebra, Japan) [see Figs.…”

Section: Cross Geometry Of the Pva-h Model For Tracking System And Momentioning

confidence: 99%

Development of an In Vitro Tracking System with Poly (vinyl alcohol) Hydrogel for Catheter Motion

Kosukegawa

Mamada

et al. 2010

JBSE

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Vascular diseases, such as ischemic heart disease, infarction, aneurysms, stroke and stenosis are a leading cause of serious long-term disability and their mortality rate is as high as that of cancers in many countries. Recently, neurovascular intervention using catheters is a minimally-invasive endovascular technique used to treat vascular disease of the brain, and a navigation system for catheters has been developed to facilitate surgical planning and to provide intra-operative assistance. Since the mechanical properties of a catheter play an important role in reaching the targeted disease, tracking of catheter movement during endovascular treatment may be useful to increase confirmation of the rate of successful operation. In this study, we developed an in vitro tracking system for catheter motion using poly (vinyl alcohol) hydrogel (PVA-H) to mimic an arterial wall. The employed models were made of PVA-H, which is sufficiently transparent to permit observation of catheter movement in the artery. This system is expected to contribute to validation of computer-based navigation systems for surgical assistance.

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Three dimensional measurements of cerebral aneurysms and vessel size

Cited by 2 publications

References 0 publications

Effect of parent artery expansion by stent placement in cerebral aneurysms

Effect of parent artery expansion by stent placement in cerebral aneurysms

Development of an In Vitro Tracking System with Poly (vinyl alcohol) Hydrogel for Catheter Motion

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