What is the role of HEPA filters in the operating room?

Create a comfortable environment conducive to work for medical staff, and meet the strict requirements of air temperature, humidity, wind speed, freshness, cleanliness and noise during the operation. So, the surgery department building has

The clean area, quasi-clean area and general area are strictly divided, with a clear flow direction and rigorous plane function area.

Air cfu/m3: ≤10 object surface cfu/cm3: ≤5 Medical staff hand cfu/cm3: ≤5 With the continuous improvement and improvement of modern hospital conditions, environment and medical quality, layer

Flow equipment has gradually been equipped and applied to the hand room. The following is a brief introduction to the design concept of our company.

1 Flow level operating room – Clean and comfortable working environment Laminar flow operating room adopts air cleaning technology to control microbial contamination to different degrees, so as to control the air cleanliness in the space environment

Requirements for various types of surgery; And provide appropriate temperature, humidity, to create a clean and comfortable operating space environment. The laminar flow operating room not only requires highly clean air (the air entering the operating room must first be purified by the “SFFILTECH” brand high efficiency air filter), but also requires that the flow direction of the air flow can be controlled (that is, the use of laminar flow ultra-clean device), so that the air flow from the high cleanliness of the operating area to the low cleanliness area, and take away and discharge

Dust particles (dusts) and bacteria in the air stream; Laminar flow is a small, thin layer of air flow, at a uniform flow rate to the same direction of the air filter; The direction of purification air can be divided into vertical layer flow and horizontal layer flow

Two kinds. The Supply air ceiling for operating theatre is installed on the wall of the foot side of the operating patient, the air flow is blown horizontally, and the return air mouth is set at the opposite side

On the ceiling side to the wall(Hepa air filter manufacturer). Generally, vertical layer flow is more effective.

Laminar flow operating room is a “positive pressure” environment. The air pressure varies according to the cleanliness requirements of different areas (such as operating room, sterile preparation room, brush room, surrounding clean area, etc.). Don’t

The air cleanliness standards of laminar flow operating rooms at the same level are different. For example, the U.S. federal standard for level 100 laminar flow operating rooms is ≥0.5μm dust particles per square foot of air, ≤100 dust particles or per liter of air

Medium ≤3.5 stars. Level 1000 refers to the number of dust particles per square foot of air ≥0.5μm, ≤1000 particles or ≤35 particles per liter of air. And so on.

Different levels of laminar flow systems also have different air displacement rates in the control space environment. The higher the cleanliness level, the faster the displacement rate, and vice versa.

The wall of laminar flow operating room should be painted with special antibacterial paint, which has bright light, soft color and does not need to be cleaned with water.

2. Functional characteristics of laminar flow operating room

2.1 Low bacterial count in the operating room.

2.2 Comfortable air flow (indoor temperature can be 15-25℃, humidity can be adjusted between 50-65%).

2.3 Positive pressure air flow (+23-25Pa) in the operating room to prevent the entry of external pollution.

2.4 The air in the operating room is fresh and clean, and the working environment is comfortable.

2.5 In laminar flow operating room, there is generally no need to use physical or chemical methods for disinfection, which not only saves labor, but also avoids adverse gas effects.

2.6 Nosocomial infection rates (especially those from operations and burns) have been significantly reduced.

2.7 Noise: Noise generated by the operation of the air processor (supply air, return air, etc.) and air conditioning system of laminar flow equipment

Sound, a kind of noise in laminar flow operating room, is also a major shortcoming of laminar flow operating room. Fortunately, the operating room volume is 42dB, but no discomfort; But the volume outside the operating room is more than 65dB, forming noise interference.

“The heart wants to be quiet and the sound is more than”, a long-term place, there is a process of tolerance and adaptation