Biomechanical and structural assessment of transluminal angioplasty

Keris, Valdis; Ozolanta, Iveta; Enina, G.; Kasyanovs, Vladimirs; Aide, Haralds; Bricis, Raimonds

doi:10.1016/s1350-4533(98)00032-0

Cited by 4 publications

(5 citation statements)

References 30 publications

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“…Preliminary results of our group, as well as the Lithuanian group showed that value of rupture pressure for cerebral arteries is much higher than highest observed values of systolic pressure, which are not greater than 250 mm of mercury that is, less than 0.5 atm [8,9]. We also showed that value of the rupture pressure lowers with age according to the exponential regression.…”

Section: Discussionsupporting

confidence: 58%

Age dependence of critical pressure in the segments and branches of the circle of Willis

Piechna

Lombarski

Krajewski

et al. 2017

Neurologia i Neurochirurgia Polska

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Spontaneous intracranial haemorrhage is one of the most dramatic neurological disasters. The source of haemorrhage is linked to the pathology of the arterial wall or is unknown. Because the risk of haemorrhagic stroke increases with age, we tried to investigate the relationship between age and rupture pressure of cerebral arteries. In the presented study, 51 segments of large cerebral arteries (at the level of the circle of Willis and its incoming and outgoing branches) were obtained from 33 cadaver brains aged 12-86 years. The segments were pressurized up to the rupture. The rupture pressure was noted. The highest observed pressure was 4.3atm in specimen aged 24 years. The lowest pressure 1.19atm was observed in specimen aged 80 years. The mean value of rupture pressure of all investigated segments was 2.28atm. Statistical analysis showed a nonlinear exponential decrease of the rupture pressure of the large cerebral arteries with age. The main conclusion from our study is that drop of cerebral arteries strength is observed to the age of 40. Later this lowering is visible but not so evident.

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Section: Discussionsupporting

confidence: 58%

Age dependence of critical pressure in the segments and branches of the circle of Willis

Piechna

Lombarski

Krajewski

et al. 2017

Neurologia i Neurochirurgia Polska

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“…Due to its direct effects on the biomechanics and structure of the arterial wall, BA promises longer-term effects and may thus result in a lower rate of vasospastic infarctions [64,65]. We support the use of BA only in the case of severe spasms (> 50 % constriction of the affected vessel compared to the baseline finding on catheter angiography) in the large cerebral arteries (including the proximal part of the second segment of the anterior cerebral artery and the middle cerebral artery).…”

Section: Balloon Angioplastymentioning

confidence: 99%

“…tischen Infarkten zu führen [64,65]. Wir propagieren, die BA nur bei schweren Spasmusbefunden (≥ 50 % Verengung des betroffenen Gefäßes im Vergleich zum Ausgangsbefund in der Katheterangiografie) in großen Hirnarterien (einschließlich des proximalen Teils der 2.…”

Section: Reviewunclassified

“…Die BA verspricht aufgrund ihrer direkten Effekte auf die Biomechanik und Struktur der arteriellen Gefäßwand längerfristige Effekte und vermag somit zu einer niedrigeren Rate an vasospastischen Infarkten zu führen 64 65 . Wir propagieren, die BA nur bei schweren Spasmusbefunden (≥ 50 % Verengung des betroffenen Gefäßes im Vergleich zum Ausgangsbefund in der Katheterangiografie) in großen Hirnarterien (einschließlich des proximalen Teils der 2.…”

Section: Endovaskuläre Spasmustherapienunclassified

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Neuroradiological diagnosis and therapy of cerebral vasospasm after subarachnoid hemorrhage

Neumann,

Schacht,

Schramm

2024

Rofo

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Background Cerebral damage after aneurysmal subarachnoid hemorrhage (SAH) results from various, sometimes unrelated causes. After the initial hemorrhage trauma with an increase in intracranial pressure, induced vasoconstriction, but also microcirculatory disturbances, inflammation and pathological electrophysiological processes (cortical spreading depolarization) can occur in the course of the disease, resulting in delayed cerebral ischemia (DCI). In the neuroradiological context, cerebral vasospasm (CVS) remains the focus of diagnostic imaging and endovascular therapy as a frequent component of the genesis of DCI. Methods The amount of blood leaked during aneurysm rupture (which can be detected by CT, for example) correlates with the occurrence and severity of CVS. CT perfusion is then an important component in determining the indication for endovascular spasm therapies (EST). These include intra-arterial drug administration (also as long-term microcatheter treatment) and mechanical procedures (balloon angioplasty, vasodilatation using other instruments such as stent retrievers, stenting). Conclusion This review summarizes the current findings on the diagnosis and treatment of CVS after aneurysmal SAH from a neuroradiological perspective, taking into account the complex and up-to-date international literature. Key Points Citation Format

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“…13,15 Injuries caused by intraluminal inflation of the balloon range from endothelial damage (abrasion and dissection) to necrosis of the tunica media, chiefly interfering in the function of components of the extracellular matrix. 16 Keris et al 17 observed that arterial segments subjected to balloon angioplasty had reduced tangential elastic modulus in the circumferential direction, which could predispose to increases in the diameter of the vessel when subjected to normal blood pressure.…”

Section: Introductionmentioning

confidence: 99%

Lesão aguda da parede arterial provocada pelo método de interrupção temporária de fluxo em diferentes vias de cirurgia aórtica: estudo morfológico e biomecânico da aorta de porcos

et al. 2020

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Resumo Contexto O clampeamento aórtico e a oclusão da aorta com balão poderiam levar a lesões na parede aórtica. Objetivo O objetivo deste estudo foi verificar as alterações da parede aórtica relacionadas ao método de interrupção de fluxo (cample ou balão) em diferentes técnicas disponíveis para cirurgia de aorta. Métodos Os experimentos foram realizados em 40 porcos fêmeas pesando de 25-30 kg, alocados para quatro grupos: S (n = 10), nenhuma intervenção (sham); C (n = 10), laparotomia mediana transperitoneal para acesso à aorta abdominal infrarrenal com tempo de clampeamento de 60 minutos; L (n = 10), cirurgia laparoscópica da aorta abdominal infrarrenal com tempo de clampeamento de 60 minutos; EV (n = 10), controle aórtico proximal com inserção de cateter-balão para oclusão aórtica por acesso femoral, inflado a fim de promover oclusão aórtica contínua por 60 minutos. Após a eutanásia, as aortas foram removidas e seccionadas para obtenção de espécimes histológicos destinados a análises morfométricas e por microscopia de luz. Os fragmentos longitudinais restantes foram estirados até a ruptura, e determinaram-se padrões mecânicos. Resultados Observou-se redução do limite de proporcionalidade da aorta abdominal, diminuição da rigidez e da carga de ruptura nos grupos submetidos a campleamento aórtico (C e L) em comparação ao grupo EV. Conclusões O campleamento aórtico durante cirurgia aberta ou laparoscópica pode afetar as propriedades mecânicas da aorta, ocasionando redução de resistência da parede aórtica sem desencadear alterações na estrutura histológica da parede aórtica.

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Biomechanical and structural assessment of transluminal angioplasty

Cited by 4 publications

References 30 publications

Age dependence of critical pressure in the segments and branches of the circle of Willis

Age dependence of critical pressure in the segments and branches of the circle of Willis

Neuroradiological diagnosis and therapy of cerebral vasospasm after subarachnoid hemorrhage

Lesão aguda da parede arterial provocada pelo método de interrupção temporária de fluxo em diferentes vias de cirurgia aórtica: estudo morfológico e biomecânico da aorta de porcos

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