What is the working principle?
In the surgical industry, hot Air Ovens are used to sterilize equipment and materials. Moist heat sterilization is carried out in a hot Air Oven. Dry heat sterilization is used for non-wetting devices and materials that will not melt, ignite, or change shape when exposed to high temperatures. Sloppy heat sterilization takes less time than moist heat sterilization because it uses water boiling or steaming objects to sterilize them.
Dry heat sterilization is performed by conduction. The heat is absorbed by the outer surface of the item and flows in layers towards the center of the item. The entire item will reach the proper sterilization temperature.
Dry heat does most of the damage by oxidizing the molecules. With the elimination of basic cellular elements, the organism dies. To kill the hardy spores, the temperature was held constant for nearly an hour.
For sterilization using a hot air sterilizer, common time/temperature relationships are as follows:
170°C (340°F) for 30 minutes,
160°C (320°F) for 60 minutes,
150°C (300°F) 150 minutes or more, depending on volume.
Benefits of Using a Laboratory Hot Air Stove
Not all items can be sanitized with water. Suitable for powder, oil and other materials.
Items do not need to be deconstructed as they have been exposed to high temperatures for extended periods of time.
Dry sterilization even protects metal equipment that would otherwise be destroyed or damaged during wet sterilization.
Operators are safe when using dry sterilization. Unlike steam sterilization, which uses a pressurized method in the wet process, this method does not use pressurized methods.
Precautions to take include:
• Sterile materials are stored on perforated shelves.
• There needs to be enough space between items and enough distance from walls for even heating.
