The air purification system of the modular operating room is introduced in detail

The air purification system of a modular operating room is a key part of ensuring a clean operating environment and reducing the risk of surgical infection. The following details are introduced from the aspects of the working principle, main components, air flow organization form, and system advantages:
Working principle
Filter principle: Mainly through different levels, and different materials of the filter, the dust particles and microorganisms in the air are intercepted, adsorbed, and filtered. The initial effect filter can filter the larger particles of dust; Intermediate filters further remove smaller particles; The high-efficiency filter (HEPA) can filter out dust particles and most microorganisms with a diameter of 0.3 microns and above, so that the air entering the operating room reaches a high cleanliness standard.
The principle of air displacement: The use of reasonable air organization, with a certain wind speed and flow direction to discharge the indoor polluted air, at the same time into the purified fresh air, through continuous air displacement, to maintain the cleanliness of the indoor air and appropriate temperature and humidity.
Major component
Air handling unit: is the core equipment of the air purification system, it integrates a fan, filter, surface cooler, humidifier, heater, and other components. The fan provides power to circulate the air, the filter filters the air, the surface cooler and heater regulate the air temperature, and the humidifier controls the air humidity to ensure that the air sent into the operating room meets the specified temperature, humidity, and cleanliness requirements.
Filter: including the primary effect, medium effect, and high-efficiency filter. The initial effect filter is generally made of non-woven fabric or metal mesh and other materials, which can filter dust particles above 5 microns and can effectively protect the subsequent medium effect and high-efficiency filters. Medium effect filters are usually made of materials such as glass fiber or synthetic fiber, which can filter 1-5 micron particles. The high-efficiency filter mostly uses ultra-fine glass fiber filter paper, etc., and the filtration efficiency of 0.3-micron particles can reach more than 99.97%.
Air supply and return air: air supply will be purified air evenly into the operating room, the common form of high-efficiency air supply, laminar flow air supply, and so on. The return air outlet is responsible for discharging the air in the room and forming a complete air circulation in the room. The position, quantity, and form of the supply air outlet and return air outlet are reasonably designed according to the layout and air organization requirements of the operating room.
Disinfection and sterilization device: In order to further kill microorganisms in the air, the air purification system is usually equipped with disinfection and sterilization devices, such as ultraviolet disinfection lamps, plasma sterilizers, ozone generators, etc. These devices can eliminate bacteria and viruses in the air during the air circulation process and improve the health quality of the air.
Air pattern
Laminar flow
Vertical laminar flow: Air flows vertically down from the top of the operating room, through the surgical area at an even speed and laminar flow state, and then exits through the return air outlet at the bottom of the operating room. This airflow organization form can form a top-down clean air curtain, and effectively isolate the surgical area from the surrounding environment, to prevent pollutants from entering the surgical area, suitable for surgeries with high cleanliness requirements, such as heart surgery, organ transplant surgery, and so on.
Horizontal laminar flow: Air flows horizontally from the wall on one side of the operating room to the other side, forming a horizontal flow of clean air in the surgical area. Horizontal laminar flow can ensure the cleanliness of the surgical area to a certain extent, and compared with vertical laminar flow, its equipment installation and maintenance costs are lower, and it is suitable for some operations with high cleanliness requirements but relatively not so harsh, such as general surgery.
Turbulent flow: The purified air is sent to the operating room at a certain speed and Angle through the air supply port, so that the air forms irregular turbulent movement in the room, mixes with the original air in the room, dilutes the concentration of pollutants, and then discharged from the return airport. The turbulent air flow organization form is relatively simple, the cost is low, and it is suitable for general operating rooms or auxiliary areas with relatively low cleanliness requirements.
System advantage
Efficient purification: It can effectively filter dust particles and microorganisms in the air, so that the air cleanliness of the operating room can reach a high standard, providing a sterile and clean environment for the operation and reducing the risk of surgical infection.
Stable and reliable: Using advanced technology and high-quality equipment, the system runs stably and can continue to provide clean air in line with standards for a long time. At the same time, it has perfect monitoring and alarm functions, which can monitor the cleanliness of the air, temperature and humidity, and other parameters, and issue alarms in time once abnormal conditions occur.
Flexible adjustment: According to different surgical types and needs, flexible adjustment of air flow, velocity, temperature humidity, and other parameters to meet the requirements of various operations on the environment. For example, for some surgeries that are more sensitive to changes in temperature and humidity, the temperature and humidity in the room can be precisely controlled to create the best conditions for surgery.