Table 5.

Arterial line filter criteria values ranked in overall net descending order of air-separating performance at 4.5 L/min, 32°C, and 20% hematocrit.

Filter (Screen μm)	Percent Rated (μm)*	90% (μm)*	Prime Volume (mL)	Flow Resistance†	Cubic Micrometers After Bolus‡	Peak Micrometers After Bolus§	Seconds After Bolus¶
Cobe 21	93	15	178	3.33	0.85	190	40
Gish 25	97	5	168	4.28	1.65	225	62
Pall LG-6 40	99	5	220	4.66	3.06	215	108
Medtronic 20	94	5	212	4.27	3.10	275	70
Dideco 27	90	27	195	5.16	10.01	300	85
Cobe 43	85	70	178	2.94	67.09	325	166
Terumo 40	80	82	200	3.47	36.16	300	145
Medtronic 38	77	75	212	4.10	35.42	290	157
Terumo 37	78	75	125	4.13	34.71	330	203
Gish 40	80	75	168	4.14	70.92	345	146

^*Percent removal at rated pore size when challenged with a high-count, 10-to 200-μm flowing distribution of GME.

^†Flow resistance in mmHg/L/min with 100 mmHg afterload.

^‡Gas volume passed in ×10⁷ μm³ after filter inlet 10-mL room air bolus.

^§The largest micrometer GME at filter outlet after filter inlet 10-mL room air bolus.

^¶Seconds that filter outlet GME persist after filter inlet 10-mL room air bolus.