The air filtration system in operating rooms require two filters in such a way that the first filter with a lower efficiency prolongs the life of the high efficiency filter that is the essential element in the air filtering of a operating room.
The first filter (prefilter) with a honeycomb form, does not permit that large particles enter into the ventilation system. The second is a high efficiency filter from 90 to 95% with a sealant that does not permit the adhesion of particles or germs.
In operating rooms where there is organ transplants, orthopedic surgery or surgery in patients that have to be in 100% immunes ambients, the second filter should have a high efficiency or HEPA with 99.97% - 99.99%.
The filters should be controlled so that they do not have leaks and they should have monitoring systems periodically. The pressure within the operating room should be higher the adjacent areas.
The advantage of installing a controlled air system in an operating room is to minimize the clostridium spores. The amount of microbic particles in the operating room is directly proportional to the amount of skin that is exposed of the personnal that are within the operating room.
One person is capable of generating an average of 4.000 to 50.000 colonies of microorganisms.
CHARACTERISTICS OF THE PROT ECTED AREA
High efficiency air filters using central filters or HEPA filters that reach a 99.97% - 99.99% efficiency filtering particles of 0.3 microns.
ROOMS WITH RESPIRATORY ISOLATION
- With the air flow directed from the outlet of the air surrounding the patient and directing the air to the exhaust grill of the air.
- Positive pressure in the room.
- Laminar flow.
This type of room is designed for pacients with:
The room should be individual and should have the following characteristics:
- Negative pressure in its interior
- Exchange rate of air per hour between 6 and 12.
- Extraction of the air of the room to the outside that has been previously filtered
- The door should be kept closed permanently
The filters are used to clean the air that is introduced into the room and also the contaminated air leaving the room. As occurs in investigation bacteriology and virological laboratories