Hemodynamic Evaluation of a Centrifugal Left Atrial Decompression Pump for Heart Failure with Preserved Ejection Fraction

Figures

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  Figure 1. An illustration of how the developed pump will be implanted.

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  Figure 2. General schema of the pump with the dimensions.

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  Figure 3. The volute printed by SLA.

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  Figure 4. Mesh independence study of different mesh sizes on pressure gradient for the pump with impeller SH1 at the flow rate of 0.5 L/min and rotational speed of 2900 rpm.

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  Figure 5. Mesh distribution on the fluid volume of the pump with the impeller of SH1.

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  Figure 6. Closed-loop test bench for hydraulic performances: (1) reservoir; (2) circulation pump; (3) prototype-mini pump; (4) flow meters; (5) pressure sensors; (6) valves.

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  Figure 7. Experimental hydraulic performances of the pumps with (a) impeller SH0.5 and (b) impeller SH1 at different rotational speeds.

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  Figure 8. Comparison of experimental and numerical hydraulic performances for two prototypes operating at 3000 rpm.

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  Figure 9. Four planes showing the details of the SSS.

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  Figure 10. SSS fields of the two pumps at four planes.

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  Figure 11. (a) Volume fractions and (b) the sum of cell residence times, subjected to the specific shear stress thresholds.

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  Figure 12. WSS magnitude for the two pumps.