TAF technology
 

Avidicare uses unique technology called Temperature Controlled Airflow (TAF)

This technology enables us to use gravity to reliably control the temperature of the airflow in operating rooms and thereby reducing bacteria-carrying particles in the operative zone. More clearly; TAF creates a more reliable and effective ventilation system than a LAF (Laminar Airflow) ceiling, which require higher air speeds to counteract the convection currents from the staff and equipment.

The drawbacks of LAF Ceilings

The industry standard for ventilation systems was previously LAF ceilings. The drawback of traditional LAF ceilings is that they take up a large proportion of the ceiling surface and often need higher air speeds to be able to counteract the bacteria flow in the operating room. This can be done more effectively by reducing the number of bacteria-carrying particles in the operative zone, and, thus, create zones of ultra-clean air. We have developed a completely new air ventilation system which greatly reduces the risk of infection during surgery – discover Opragon here.

How does TAF work?

To ensure that the air in the operating room remains uncontaminated, the convection flows from the staff and equipment must be broken. Otherwise, there is a dissemination risk of uncontrolled airborne bacteria. Ventilation systems with a lower air speed poses a greater risk of bacteria-carrying particles from the staff which can lead to contamination of the air in the operative zone. Higher speeds, on the other hand, causes draughts, noise, dehydration of the patient and staff, cooling of the patient, and turbulence, which reduces the effect of the laminar airflow. This is precisely why we developed Opragon, which combines the classic mixed ventilation (which dilutes the number of bacteria-carrying particles) with a cooled airflow. Combining the two systems in the same operating room produces extremely effective ventilation.

The technology behind TAF is based on the ventilation system pumping out slightly cooled air into a zone around the operating table. By taking advantage of the fundamental laws of nature, TAF breaks the convection currents in an effective and energy-efficient manner. Since cool air is denser than the surrounding warmer air, it drops towards the floor. The air speed is dictated by the temperature difference in the room. The system enables reliable and stable control of air movements, and thereby also the airflow's fall speed over the patient and the sterile-clad staff. The technology reduces the presence of bacteria-carrying particles in the operative zone while at the same time helping to create a comfortable working environment. It makes the temperature slightly cooler for sterile-clad staff and slightly warmer for other staff in the room.

The temperature difference dictates the speed

If the air, coming from the ventilation system, is cooler than the layer of air at the level of the operative zone, the ultra-clean air will drop down to the operative zone and thereby provide its protective effect. The convection currents are broken and the airborne bacteria are transported away from the patient and the sterile instruments. In order for the ultra-clean air to reach the operative zone, there must be a fall speed of about 0.25 m/s at the level of the operative zone. The speed at the operating table will vary depending on the temperature difference between the ultra-clean air and the ambient room air in the operating room. 

During the development of Opragon, we determined that a temperature difference (ΔT value) of -1.5 to -3°C is required between the ultra-clean air and the ambient room air at the operating table to guarantee a fall speed of about 0.25 m/s at the level of the operating table. The technology continually checks to ensure that the ultra-clean air maintains a constant under temperature of 1.5–3°C regardless of the temperature of the ambient room air.