Table 1.

MB counts per minute 4.0 LPM + filter bleed in cardiotomy (control).

	Before the Membrane (MB/min)	After the Arterial Filter (MB/min)	Percent Decrease	p
RX25	17 ± 8.0	0 ± 0	100	.0176
Vision	153 ± 239	2.0 ± 1.0	99	NS
Affinity	510 ± 242	43 ± 17	91.6	.0289
Quadrox	444 ± 126	46 ± 28	89.6	.0330
Synthesis	10 ± 6.0	2.0 ± 1.0	80	NS

NS, not significant.