疾病科普

简介:
颅内动脉瘤

Intracranial aneurysm is not a solid tumor, but an abnormal topical bulge in the arterial wall caused by abnormal vascular changes, which is the weakest part of the vessel wall. Aneurysms may rupture and bleed under the impact of blood flow and changes in blood pressure. Due to the atypical symptoms before rupture but dangerous and rapid development of the disease after rupture, many patients die before they are sent to the hospital in time. This makes aneurysm a real invisible killer. It is also known as a “time bomb” in the intracranial cavity.

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  • 症状

    Intracranial aneurysms are usually asymptomatic if they are small in size with no rupture.
    They may compress the surrounding blood vessels and nerves if they are large in size, causing symptoms of cerebral ischemia and nerve compression such as headache, dizziness, blurred vision, and numbness on one side of the face.
    Ruptured intracranial aneurysms may cause blood oozing or hemorrhage, sudden headache, confusion, blurred vision and even shock.
  • 风险

    Ruptured aneurysm is a serious, life-threatening emergency that may lead to a hemorrhagic stroke. Patients often fall into a coma within minutes and die rapidly due to brainstem damage.
  • 诊断

    CT scan can be used to determine the presence of hemorrhagic foci; MRI can be used to show the relationship between intracranial aneurysm and the surrounding important structures, and to determine the size of aneurysm and the conditions of intratumoral thrombus; CTA can be used to display the morphology of aneurysm and the relationship between parent artery and bony structure. MRA has a higher detection rate for unruptured aneurysms. Digital subtraction angiography (DSA) clearly shows aneurysms and vascular structures and it is the gold standard used for aneurysm diagnosis.
解决方案
01

Intrasaccular embolization

With the support of angiography, the access from femoral artery to target vessel is established and a embolization coil is implanted into the aneurysm through a microcatheter. The embolization coil will reduce the blood flow and blood velocity in the aneurysm lumen to promote thrombosis in the aneurysm lumen until the aneurysm is completely occupied by the embolization coil and thrombus and no more blood flows into the aneurysm, thus achieving the purpose of aneurysm treatment.
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02

Flow-diverting surgery

With the support of angiography, the access from femoral artery to target vessel is established, and a flow diverter is delivered into place and released through a stent microcatheter. The flow diverter interferes with the blood flow into the aneurysm, causing blood stagnation in the aneurysm and promoting the formation of intratumoral thrombosis, thus achieving the purpose of aneurysm treatment.
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03

Endovascular exclusion

With the support of angiography, the access from femoral artery to target vessel is established, and the stent graft is delivered in place and released through an intermediate catheter. The outer layer of the stent graft will isolate the blood flow into the aneurysm/cavernous sinus fistula and promote thrombosis, thus achieving the purpose of aneurysm treatment.
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