TABLE 2.
FILTERING EFFICIENCIES OF THE THREE SURGICAL MASKS.
| MASK TYPE | PERCENTAGES OF PARTICLES REMOVED (FILTERING EFFICIENCY) AT THE TWO AIRFLOW RATES STUDIED |
|
|---|---|---|
| Airflow Rate | ||
| 0.5 m3/hour* | 9 m3/hour | |
| 1818 Mask† | 85 | 86 |
| 1942 Mask‡ | 90 | 92 |
| 1862 Respirators§ | 94 | 96 |
*
m3/hour: Cubic meters per hour.
†
1818 Tie-On Surgical Mask (3M ESPE SpA, Milan, Italy).
‡
1942 FB Fluid Resistant Molded Surgical Mask (marketed internationally as the Aseptex Fluid Resistant Molded Surgical Mask 1800) (3M ESPE SpA, Milan, Italy).
§
1862 Health Care Particulate Respirator and Surgical Mask (3M ESPE SpA, Milan, Italy).