Comparison of stent-assisted coiling for unruptured internal carotid artery aneurysms between lvis or lvis jr. and enterprise vrd: a retrospective and single-center analysis

Abstract

To compare the low-profile visualized intraluminal support (LVIS or LVIS Jr.) stent, which is a braided microstent, and Enterprise Vascular Reconstructive Device (VRD), which is fabricated using laser cutting technology, in the treatment of internal carotid artery aneurysms. We investigated 49 unruptured aneurysm cases in which follow-up digital subtraction angiography had been performed. Results of the occlusion were divided into classes 1, 2, and 3 of the Raymond-Roy Occlusion Classification. Statistical significance was defined as p < 0.05. In the 49 aneurysm cases, we achieved class 1 in 23 (47%; LVIS or LVIS Jr., 7; Enterprise, 16; p=0.76), class 2 in 13 (27%; LVIS or LVIS Jr., 5; Enterprise, 8; p=0.74), and class 3 in 13 (27%; LVIS or LVIS Jr., 5; Enterprise, 8; p=0.74). Based on the follow-up imaging of the 49 aneurysms, we achieved class 1 in 32 cases (65%; LVIS or LVIS Jr., 16; Enterprise, 16; p < 0.01), class 2 in 7 (14%; LVIS or LVIS Jr., 0; Enterprise, 7; p < 0.01), and class 3 in 10 (20%; LVIS or LVIS Jr., 1; Enterprise, 9; p=0.13). Recently, the flow diversion effect of stents has garnered more attention compared to coil embolization. LVIS or LVIS Jr. exerts a higher flow diversion effect than other stents and may improve the Raymond-Roy Occlusion Classification. In the future, the role of stents in the treatment of aneurysms will become more important.