The classification of hundred-class, thousand-class and ten-thousand-class operating rooms means: the air purity grade of laminar operating rooms

According to the Technical Specification for Clean Operating Department of Hospitals (GB5333-22) issued by the Ministry of Construction, the air cleanliness of laminar operating rooms can be divided into five grades: hundred-class, thousand-class, ten-thousand-class, one-hundred-thousand-class and three-hundred-thousand-class.

1. Laminar flow operating room: Laminar flow operating room adopts air cleaning technology to control microbial pollution in different degrees, so as to meet the requirements of controlling air cleanliness in space environment and being suitable for various operations; It also provides suitable temperature and humidity, creates a fresh, clean, comfortable and low-bacterial operation space environment, so that the patient's tissue is damaged as little as possible during the operation, and the infection rate is greatly reduced, especially for intracranial surgery and burn surgery, so as to ensure that the patient can recover faster and better after the operation.

2. Specific operation of laminar flow operating room

1). Strictly purify the air purification system of each operating room. There are different levels of filters in the four corners of the operating room wall, purification unit, ceiling, corridor, fresh fan and exhaust fan, and they are cleaned, maintained and replaced regularly to strictly ensure the sterility of indoor air; In addition, the sanitary management of laminar flow operating room can't be relaxed except the daily cleaning work as in the past, and it also has special requirements for indoor cleaning work. The indoor corners are all designed in an arc structure, and no 9 corner can be found, so that bacteria have nowhere to hide, avoiding endless dead corners, and there is no need to use physical or chemical methods for disinfection indoors, which not only saves labor but also prevents the entry of external pollution. ?

2). The positive pressure ventilation laminar flow operating room requires not only highly clean air (the air entering the operating room must be purified by high-efficiency filters first), but also the direction of airflow (that is, the laminar flow ultra-clean device is adopted). A positive pressure environment is formed in the operating room, so that the airflow flows from the operating area with high cleanliness to the area with low cleanliness, and a thin and thin airflow is transported in the same direction at a uniform speed, and dust particles in the airflow are taken away and discharged. At present, laminar flow operating room is divided into vertical laminar flow and horizontal laminar flow. The supply air ceiling for operating theatre is installed directly above the operating bed, and the airflow is blown vertically. The air return openings are set at the four corners of the wall to ensure the cleanliness of the operating table to meet the standard. Generally, vertical laminar flow is adopted to achieve better results. This vertical laminar flow is adopted in Guangzhou Modern Hospital. A tower-type negative pressure suction system is also installed at the top of the operating room to suck the air exhaled by doctors during surgery out of the tower, further ensuring the cleanliness and sterility of the operating room and reducing the infection rate of surgery. ?

3). Single channel flows to the hospital. A wall is made between the laminar flow operating room and the disinfection cabinet, and an inlet and outlet single channel is set up. The articles to be disinfected are 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, thus avoiding the secondary pollution of the disinfected articles during the transfer.

3. Requirements: The air pressure of laminar flow operating room varies according to the cleanliness requirements of different areas (such as operating room, aseptic preparation room, hand brushing room, anesthesia room and surrounding clean area, etc.). Different levels of laminar flow operating rooms have different air cleanliness standards. For example, the American federal standard 1 is the number of dust particles ≥.5μm per cubic foot of air, ≤ 1, or ≤35 per liter of air. The standard of 1 laminar flow operating room is the number of dust particles ≥.5μm per cubic foot of air, ≤1 or ≤35 per liter of air. And so on.