(Summary description)Operating room (O.R) is a place to provide operation and rescue for patients, and it is the core area of infection control in hospitals. According to the definition of Architectural technical code for hospital clean operating department (GB50333-2013), the traditional clean operating rooms are divided into four classes, as shown in the following table:

 





clean room class


Airborne /depositing bacterial concentration


Air cleanliness class


Reference for operation




Operating zone


Surrounding zone


Operating zone


Surrounding zone




I


0.2cfu/30min ·φ90皿（5cfu/m3）


 0.4cfu/30min ·φ90皿（10cfu/m3）


5


6


Prosthesis implantation, some large organ transplantation, and these operations the infections of which can directly endanger life and quality of life




II


0.75cfu/30min ·φ90皿（25cfu/m3）


1.5cfu/30min ·φ90皿（50cfu/m3）  


6


7


Large-scale surgery involving deep tissues and major organs of life




III


 2cfu/30min ·φ90皿（75cfu/m3）


4cfu/30min ·φ90皿（150cfu/m3）  


7


8


Other surgical procedures




IV


6cfu/30min·φ90皿（175cfu/m3）


8.5


Infection and heavily contaminated surgery 





 

The cleanliness class of the operating room is closely related to the efficient and safe air cleaning system in the operating room. The air cleaning system can not only ensure the sterile environment, but also prevent cross-infection of personnel and play an important role in the success of the operation. It is an indispensable key supporting system in the operating room.

According to traditional theory, the air supply units in clean operating room should have two basic functions: one is to quickly replace all polluted air in the operating zone with dust-free sterile air to ensure the cleanliness and sterility of the operating zone; the other is to prevent the unclean air outside the air supply flow from penetrating into the operating zone. Moreover, the temperature and humidity control of air supply in the operating room can ensure the surgeons to operate in a comfortable environment. However, since the air supply in the traditional operating rooms is sent at the unchanged temperature and speed, it is difficult to improve the anti-interference ability of air flow, so patients may have hypothermia.



MayAir focuses on the development of high-end air cleanness technology in China. In order to make up for the deficiencies of traditional air supply and cleanness units, our professional R&D team, under the guidance of Professor Shen Jinming and Professor Liu Yanmin of Tongji University, has developed a special air supply system with wide outlet air curtain for low-speed airflow, which can provide different temperature and air speed at the same time, in operating rooms.

The air supply system with wide outlet air curtain for low-speed airflow, which provides different temperature and air speed at the same time, is a new mode of air supply. Using wide outlet air curtains at two sides to supply low speed airflow, the units can keep the main air flow in the air outlets in the center. In additional to the dust-free and sterile control, the air flow from air curtain at the side can envelope around the operating table to meet the surgeon's comfort, while main air flow covers the patients which helps adjust the body temperature to keep them from hypothermia.

According to the need of operation, the air curtain on both sides and the main air supply system in the center of the units can be combined by different sizes, speeds and temperatures in different operating rooms. Computational fluid dynamics (CFD) was used to simulate the temperature field for combinations of air supply units with wide outlet air curtain for low-speed airflow in operating room, and to analyze the influence on the comfort of operators and patients.



Vertical section of doctor station



　　Longitudinal section of patient in lying position

　　Horizontal Section of doctors and patients

The air supply system with wide outlet air curtain for low-speed airflow which provide different temperature and air speed at the same time can be used in operating room with cleanliness class I and II. Enhancing the anti-interference ability of clean air flow in operating room, ensuring clean and sterile area, and meeting the temperature and humidity requirements of doctors and patients, it is a technology with independent intellectual property rights.

More importantly, with the cleanness air supply system of AC, air supply system with wide outlet air curtain for low-speed which provide different temperature and air speed at the same time can realize positive and negative pressure switching in the operating rooms, and effectively protect the safety of doctors, p

• Categories:典型应用
• Author:
• Origin:
• Time of issue:2021-08-12 15:03
• Views: