Laminar flow operating room is the environment that needs to be purified in hospital. Once the patients are infected during the operation, it will bring serious consequences. There are three main ways of surgical infection: direct contact infection, patient's own infection and infection caused by airborne bacteria falling into wounds. There are three main measures to control the occurrence of planktonic particles in laminar flow operating room, to quickly eliminate the occurrence of indoor planktonic particles and to prevent outdoor particles from entering the room. What are the principles of laminar operation room decoration and purification?
I. Non-unidirectional Flow Cleaning Principle for Laminar Flow Operating Room
The principle of this purification is to send the filtered and sterilized clean air to the laminar flow operating room, then diffuse in the room, mix with the indoor air, and discharge the same amount of air through the return air outlet. The exhausted air has diluted the indoor polluted air, and the seriously polluted indoor air will be diluted and eventually reach the equilibrium state.
2. Laws of Purified Air Filtration in Laminar Flow Operating Room
Before entering the operating room, air must be filtered through initial, intermediate and efficient filters in order to control microorganisms and non-microbial particles in the air. Initial filtration of particles and foreign bodies above 10 microns, intermediate filtration of planktonic particles within 1-10 microns, and efficient filtration of sub-micron particles below 1 micron, which is the initial and intermediate filtration of particles, which is also the key part of the air supply system. Efficient filtration can filter out particles and bacteria. It can be regarded as sterile and a good way to remove plankton in the air.
3. Laws of Purifying One-way Flow Clean Room in Laminar Flow Operating Room
During the process from the air supply surface to the air return surface, it will be filtered and sterilized, and the air flow will not change when it passes through the section. Under the balanced pressure and air flow of the static pressure box and the high efficiency filter, the flow velocity on the section purified by the laminar flow operating room is uniform, and no eddy current will be generated. Clean air flow is full of the entire operating room, and the principle of one-way flow clean room is to push out the role of the indoor dirty air into the outdoor, and then the indoor air is purified.
In order to achieve perfect purification effect, it is necessary for hospitals to establish scientific flow of people, logistics process and strict zoning management. Only in this way can the effect of controlling particulate pollution be achieved.
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