1) Strict purification
The air purification system of each operating room is equipped with different levels of filters in the four corners of the operating room wall, purification unit, ceiling, corridor, fresh air fan and exhaust fan, which are regularly cleaned, repaired and replaced to strictly ensure the sterility of indoor air. In addition, besides the daily cleaning work of laminar flow operating room, it is not allowed to relax at all There are special requirements for indoor cleaning work. All interior corners are arc-shaped structure design, and no 90 ° corner can be found, which makes bacteria have no place to hide and avoid endless dead corners. In addition, there is no need to use physical or chemical methods for indoor disinfection, which can save labor and prevent the entry of foreign pollution.
2) . positive pressure ventilation
层流手术室不仅要求高度洁净的空气（进入手术室的空气首先须经过滤器净化），而且要求能控制气流的流通方向（即采用层流超净装置），手术室内形成正压环境，使气流从洁净度高的手术区域流向洁净度低的区域，一股细小、薄层的气流，以均匀的流速向同一方向输送，并带走和排出气流中的尘埃颗粒（尘粒）和细菌。目前，层流手术室分为垂直层流式和水平层流式两种。垂直层流式（Supply air ceiling for operating theatre）过滤器装在手术病床的正上方，气流垂直吹送，回风口设在墙面的四角，确保手术台洁净度达标，一般多采用垂直层流式效果较好。广州现代医院正是采用的这种垂直的层流式，在手术室内的顶部还设置了一个吊塔式的负压吸引系统，将医生在手术时呼出的空气吸出塔外，进一步保证手术室的洁净和无菌，降低手术的感染率。
Laminar flow operating room not only requires highly clean air (the air entering the operating room must be purified by a filter first), but also can control the flow direction of air flow (that is, using laminar flow ultra clean device). A positive pressure environment is formed in the operating room to make the air flow from the high cleanliness operation area to the low cleanliness area, and a small thin layer of air flow can flow to the same area with uniform velocity Direction transport, and take away and discharge the dust particles (dust particles) and bacteria in the air flow. At present, laminar flow operating room is divided into vertical laminar flow and horizontal laminar flow. The supply air ceiling for operating theatre filter is installed on the top of the operating bed, and the air flow is vertically blown. The air return port is set at the four corners of the wall to ensure the cleanliness of the operating table up to the standard. Generally, the vertical laminar flow filter has better effect. Guangzhou modern hospital adopts this vertical laminar flow type, and a hanging tower type negative pressure suction system is set at the top of the operating room to suck the air exhaled by doctors out of the tower during operation, so as to further ensure the cleanliness and sterility of the operating room and reduce the infection rate of the operation room.
3) . single channel flow direction
The hospital made a wall between the laminar flow operating room and the disinfection cabinet, and set up a single channel for entering and leaving. The articles to be disinfected were directly transferred from the operating room to the disinfection cabinet through the "output" channel, and then transferred to the operating room through the "input" channel after disinfection, so as to avoid the secondary pollution of the disinfection articles in the transfer process.
100 level laminar flow operating room
Daily maintenance and management of laminar flow operating room
Daily management of operating room: clean the floor with diluted detergent every day, scrub the surfaces of walls, ventilation ducts, return air outlets and other objects, and mop the floors, walls, ventilation ducts, return air outlets and other objects with chlorine containing disinfectant water every week (effective chlorine concentration is 500mg / L). The primary filter screen shall be replaced monthly, the intermediate filter screen shall be replaced every quarter. The filter screen shall be inspected once every half a year by professional personnel to detect the air supply, noise and indoor positive pressure. The equipment and facilities of the purification system shall be maintained regularly, and shall be replaced once every 1-2 years according to the operation volume and flow of people.
Regular monitoring: the air in the operating room, the hands of operators and the surface of objects were cultured once a month. To ensure that the total number of bacteria in the air is less than or equal to 10 CFU / m3, and the total number of bacteria on the surface of the object is less than or equal to 5 CFU / cm2
100 level laminar flow operating room
*CFU is the average bacterial count
Reasonable planning of laminar flow operating room construction in hospital
With the improvement of modern medical level, the popularization rate of laminar flow operating room in small and medium-sized hospitals is getting higher and higher. According to the relevant data of small receipts, some hospitals lack experience in the planning of laminar flow operating room in hospital construction. While controlling the construction cost, the construction of operating room, an important department, is weakened, resulting in unqualified acceptance process after completion, substandard materials used, and so on On the contrary, it will increase the construction difficulty for the follow-up reconstruction, resulting in the corresponding economic and human resources loss.