The device was no returned for analysis as the device was implanted.
There are various mechanisms underlying late aneurysm recanalization which including the following: growth of the aneurysm itself, instability of fresh, unorganized thrombus and degradation by fibrolysis, continued transmission of blood pulsation affecting the association of the coil-thrombus complex, lack of neointima formation across the neck of aneurysm, formation of neovessels inside the aneurysms lumen, exposing the aneurysm cavity to blood flow.
In this case, it is unknown what caused the endo leak.
A meta-analysis by murthy et al (2014) showed that 6 months aneurysm occlusion rate after endovascular treatment of intracranial aneurysm with flow diverter is 79.
7%.
In this event, the patient was treated successfully treated with another device.
Linked event: 2029214-2017-00735, 2029214-2017-00737 and 2029214-2017-00738.
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Medtronic received report that 2 years post initial treatment with single flow diverter device (4.
25 x 16), there was still filling of the left ica aneurysm, which was not in a bend.
An additional device was added to close a distal edge endo leak.
The aneurysm was saccular and unruptured with a 10 mm max and 7 mm neck, within the left ica/periophthalmic and was 10 mm.
The landing zone was 4.
5 at the distal section and 3.
75 at the proximal.
It is unknown where the resistance was coming from, as the anatomy appeared straightforward.
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