Contrast Microsphere Destruction by a Continuous Flow Ventricular Assist Device: An In Vitro Evaluation Using a Mock Circulation Loop

Table 3

Prepump and postpump mean contrast signal intensity (dB) ± 1 SD with mean difference (combined data).

	Prepump SI (dB)	Postpump SI (dB)	Mean difference
2400 RPM	14.5 ± 0.7	10.0 ± 1.0	4.4 ± 1.2	< 0.0001
2800 RPM	14.8 ± 0.9	11.1 ± 0.7	3.7 ± 1.2	< 0.0001
3200 RPM	14.9 ± 0.6	12.2 ± 0.9	2.8 ± 1.2	< 0.0001
3600 RPM	15.1 ± 0.6	12.9 ± 1.1	2.3 ± 1.3	< 0.0001