Small tenuous intracranial arteries can well tolerate the deployment of two stents in “Y” configuration or an overlapping manner in treating intracranial aneurysms
Purpose To investigate parent vessel response to deployment of two stents for treatment of cerebral aneurysms.
Materials and methods Fifteen patients (11 women and 4 men aged 25-83 years) with 18 wide-necked intracranial aneurysms were treated with two stents with or without subsequent coiling. The vascular diameter was measured and compared within the native parent artery, the single stent and double stent before and immediately after stenting and at angiographic follow-up.
Results Thirty stents were deployed. Before stenting, the mean vessel diameter was 3.4±0.21 mm at point A, 3.06±0.18 mm at B, 3.16 ± 0.21 mm at C, 2.67 ± 0.27 mm at D, and 2.56 ± 0.23 mm at E. The deployment of two stents resulted in statistically significant increases in both the average vascular diameter and cross sectional area (CSA) at points C (3.51±0.22 mm and 9.76±1.17 mm2, P= 0.0006 for diameter and 0.001 for CSA, respectively) and E (2.88±0.32 mm and 7.28±1.46 mm2, P= 0.01 for diameter and 0.02 for CSA, respectively) compared with pre-stenting. At angiographic follow-ups compared with before stenting, significant increases were documented at point C (3.42±0.22 mm and 9.42±1.37 mm2, respectively) at first angiographic follow-up but at points A (3.62±0.45 mm and 10.51±2.37 mm2) and B (3.26±0.24 mm and 8.47±1.26 mm2) at second angiographic follow-up. No significant vascular stenosis was demonstrated at double stent segment compared with single stent or native artery segments.
Conclusion The small tenuous cerebral arteries can well tolerate the deployment of two stents for the treatment of intracranial aneurysms.
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