Operating room air purification

The operating room is an important technical department of the hospital, which provides corresponding operations and rescue sites according to the patient's condition. With the rapid development of surgical technology, the operating room is becoming more modern, and the safe operating room of universities can meet the needs of organ transplantation, heart, blood vessel, artificial joint replacement and other large-scale operations under the aseptic environment of the operating room. In order to be able to rescue patients in time, the layout of the operating room should be connected to the surgical department, but also close to the blood bank, nursing room, anesthesia and resuscitation room, etc. And pay attention to the management of the four ways in the operating room, such as: the designated air cleanliness classification of the operating room; the items needed in the operating room; the professional operating skills of doctors and nurses; prevent infection and ensure the success rate of surgery. The air pressure of the operating room varies according to the cleanliness requirements of different areas (such as the operating room, sterile 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 United States Federal Standard 1000 is the number of dust particles ≥0.5μm per cubic foot of air, ≤1000 particles or ≤35 particles per liter of air. The standard of 10,000-level laminar flow operating room is the number of dust particles ≥0.5μm per cubic foot of air, ≤10,000 particles or ≤350 particles per liter of air. And so on. The main purpose of ventilation in the operating room is to eliminate exhaust gas in each work room; to ensure the necessary amount of fresh air in each work room; to remove dust and microorganisms; to maintain the necessary positive pressure in the room. There are the following two mechanical ventilation methods that can meet the ventilation requirements of the operating room. Combined use of mechanical air supply and mechanical exhaust: This type of ventilation can control the number of air changes, air exchange volume and indoor pressure, and the ventilation effect is better. Mechanical air supply and natural exhaust air are used together. The air exchange and the number of air exchanges in this ventilation method are limited to a certain extent, and the ventilation effect is not as good as the former. The cleanliness level of the operating room is mainly distinguished by the number of dust particles and the number of biological particles in the air. Currently, the most commonly used is the NASA classification standard. Purification technology achieves the purpose of sterility by controlling the cleanliness of the positive pressure purification air flow. According to different air supply methods, purification technology can be divided into two types: turbulent flow system and laminar flo...