Table 3.

Mean arterial line emboli per minute downstream of the arterial line filter by size.

Microns	0–20	20–40	40–60	60–80	80–100	100–120	120–140
All data	946	486	114	20	5	2	1
Vent on	1061	556	126	22	6	2	1
Vent off	668	317	85	16	4	2	1