 
|
Grade |
The corresponding concentration |
Level ≥ 5 μm particles several / m |
Floating down bacteria / m |
Settlement bacteria / (000 / φ90 plate 30min) |
|
International unit |
|
British Single |
|
I |
M3.5 |
100级 |
≤3500 |
≤5 |
≤1 |
|
II |
M4.5 |
1000级 |
≤35000 |
≤75 |
≤2 |
|
III |
M5.5 |
10000级 |
≤350000 |
≤150 |
≤5 |
|
IV |
M6.5 |
10000级 |
≤350000 |
≤400 |
≤10 |
Practice has proved that, it is necessary to prevent patients from being infected during surgery, depends on clean air-conditioning systems, air supply design models, as well as the design of air duct construction quality, as long as clean air into the interior of the operating table to ensure the region''''''''s clean air, Patient risk of infection is minimal.
|
