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Methodology used for studying flow and shear stress in LMAs. A, Schematic image showing the system for studying flow and shear stress in LMAs. R1: proximal cannula resistance, R2: distal cannula resistance, P1: proximal pressure, P2: distal pressure, Pvessel: intravascular pressure of LMA, VDA: video dimension analyzer. B, LMA isolated, both ends mounted on glass cannulas within an arteriograph chamber and pressurized.
