Dry-heat sterilization

Definition

Dry-heat sterilization uses high temperatures to kill microorganisms, typically through hot air ovens. This method is effective for materials that can withstand high heat and are not suitable for moist-heat sterilization.

5 Must Know Facts For Your Next Test

1. Dry-heat sterilization typically operates at temperatures ranging from 160°C to 170°C for about 2-3 hours.
2. It is suitable for sterilizing glassware, metal instruments, and powders but not for liquids or materials sensitive to high temperatures.
3. One of the key advantages of dry-heat sterilization is that it does not corrode or dull metal instruments.
4. Items must be clean and free of organic material before being subjected to dry-heat sterilization to ensure effectiveness.
5. Compared to moist-heat methods like autoclaving, dry-heat sterilization requires longer exposure times and higher temperatures.

Review Questions

• What temperature range and duration are typically used in dry-heat sterilization?
• Why is dry-heat sterilization not suitable for liquids?
• What are some advantages of using dry-heat over moist-heat methods?

Related terms

Autoclaving: A method of moist-heat sterilization using steam under pressure to achieve higher temperatures.

Pasteurization: A process of partial sterilization involving mild heat treatment to reduce microbial load without damaging the product.

Incineration: A form of extreme heat treatment where materials are burnt to ashes, effectively destroying all microbial life.