Static regurgitation

Figure 16.13 shows the results obtained on static regurgitation. It can be seen that the leakage across the textile prototype in the closed position is nearly identical to that which is obtained with a bioprosthesis. Moreover, the results show that the textile prototype leaks less than the mechanical one. Indeed, the mechanical valve is characterized by clearance between the mobile part and the ring, which does not permit sealed closing. 

For all the different samples tested, both static and the dynamic regurgitations were measured and compared. Figure 16.17 demonstrates the influence of both the tightness (sample B vs C) and the specific surface area (sample B vs D) on static regurgitation. In spite of comparable specific surface area... 

Woven and yarn parameter choices have shown to greatly impact the bending modulus of the leaflets and then the acute performance of the valve substitute compared to tissue valve and mechanical valve. Tightness and specific surface are reported to be related to static and dynamic regurgitation values. However, acute results should be considered with some caution and balanced with the fabric... 

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