Neuroform2 | Asymmetric | Increased opening of stent cells with decreasing angle | Inward and outward prolapse of the stent struts starting at 110° curve |
Neuroform-Treo | Asymmetric | Increased cell opening of the stent with decreasing angle (less than NF2) | Less outward prolapse but more inward prolapse of the struts than NF2 with decreasing angles, starting at 75° |
| | Loss of normal strut configuration starting at 110° curve | |
Enterprise | Symmetric | Change of shape from round to oval | Increasing trend to flatten and to kink at the concavity with increasing size of the “aneurysm neck” |
| | Reduction of the stent diameter at the midsection starting at 90° | |
LEO | Symmetric | Flattening of the midsection of the stent starting at 90° | Less tendency to kink and flatten than Enterprise |
| | Flattening and narrowing of the distal and proximal ends starting at 115° | Inward crimping of proximal and distal ends with lumen narrowing |