Dry heat sterilization used to sterilize anhydrous (waterless) items that can withstand high temperatures. Dry heat sterilizers not commonly found in healthcare facilities today.
Generally to sterilize talcum powder for surgical procedures.
Dry heat sterilization used to sterilize sharp instruments, such as dental instruments, burrs, and reusable needles that damaged by the moisture of steam.
Dry heat sterilization accomplished by conduction where heat transferred from molecule to molecule or from the exterior surface of an item to its internal parts. The destruction of organisms occurs by oxidation. Slowly burning up the process of coagulating the cell’s protein.
Long sterilization process due to the length of time it takes for objects to reach required temperatures; unlike steam sterilization, there is no moisture present, which speeds up heat penetration.
Dry Heat Parameters
Great variations in times and temperatures based on volume, density, packaging and sterilization apparatus. It’s essential to follow the manufacturer’s instructions for the items being sterilized and the sterilizer being utilized.
Settings range from 30-minute exposure at 356° F to 6-hour exposure at 250°F. The exposure times vary to achieve the sterilization and do not include the time required for all parts to reach the desired temperature.
