Table 2.
Variation of performance parameters between original and optimal LIMA graft configurations based on multivariate single objective, i.e., based on severity parameter (SP), CFD-coupled 2D shape optimization
| Original LIMA | %Variation | Optimal LIMA |
|---|---|---|
| Ediss = 35.3 W/m3 | −0.5 | Ediss = 35.1 W/m3 |
| SP = 703 N/m3 | −58 | SP = 300 N/m3 |
| ∆P = 11 mmHg | −12 | ∆P = 9.6 mmHg |
| WSSm = 7.2 dyn/cm2 | −1.4 | WSSm = 7.1 |
| |Φ| = 7.4° | −4 | |Φ| = 7.1° |
| ζ2 = 9448 s−2 | 1 | ζ2 = 9551 s−2 |
| L = 18.2 cm | −11 | L = 16.2 cm |
Significant reductions in SP, ∆P, and L are achieved by the shape optimization. Ediss, energy dissipation; ∆P, pressure drop between proximal to distal ends of the graft; WSSm, mean wall shear stress along the graft walls, Φ: flow deviation angle, ζ : vorticity parameter, L: cord length of the graft