Clean room
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What is "clean room"
Clean room is a room of primarily medical function, where a definite
level of cleanliness must be maintained.
Among them are:
- Operating theatres,
- Delivery rooms,
- Resuscitation wards,
- Intensive therapy and burn-treatment wards,
- Rooms for blood transfusion and preparation of
blood,
- Rooms for research work in microbiology, genetics,
transplantation of organs and tissues and so on.
Classes of cleanliness
Class
of cleanliness is a number of strictly defined requirements concerning
content of admixtures and particles in air. They differ by number
of colony-forming bacteria in a unit of volume.
There are three classes of cleanliness:
- Rooms of the first class of cleanliness must have
the lowest number of bacteria per m 3 – not more than 10. They
are operating theatres for transplantations, for complicated
orthopedics and heart surgery, intensive therapy and burn-treatment
wards and leukemia treatment wards.
- Rooms of the second class of cleanliness must
have a low number of bacteria per m 3 – between 50 and 200. They
are operating theatres for immediate surgery, surgery departments
(including corridors), delivery and labour rooms, and wards for
prematurely born or traumatized children.
- Rooms of the third class of cleanliness must have
the number of bacteria per m 3 between 200 and 500. They are
intensive heart-therapy rooms, rooms for newborn babies, sterilization
rooms, dressing rooms for children and medical treatment rooms.
Requirements for climatic systems of “clean rooms”
Technological
requirements for ventilation and air conditioning systems for "clean
rooms" are as following:
- To cut spread of pathogenic microorganisms, which
means venting of air contaminants, supply of clean air, protection
of field of operation and other contamination-risk zones from
microbes contained in the air as well as prevention of air-leaks
from less clean rooms.
- To maintain the needed air-parameters for patients
and personnel: temperature, humidity, and motion of air, to
control admixture concentration that should not be above maximum
allowed concentration.
- To exclude static electricity to avoid a risk
of explosion of narcotic gases.