High pressure steam sterilization is a common sterilization method, which can effectively kill most microorganisms, including bacteria, viruses, fungi and so on. However, some items are not suitable for autoclaving because it may damage them or affect their stability. Autoclave sterilization is prohibited for the following items:

Items marked as "unable to withstand high temperature": some items, such as plastic products, disposable infusion sets, syringes, etc. Because its material or stability can't withstand high temperature, it can't be sterilized by high pressure steam.

Articles labeled "Can't withstand high pressure": Some articles are sensitive to pressure, such as some medicines and biological products, and can't be sterilized by high-pressure steam, because it may affect their composition or stability.

Paper products and books: Articles such as paper products and books are not suitable for autoclaving, because high temperature and high pressure may deform paper or damage books.

Rubber products: Rubber products are usually not suitable for autoclaving, because high temperature and high pressure may deform or damage rubber products.

Valuables: some valuables, such as jewelry, jewelry, etc. , usually not suitable for autoclaving, because high temperature and high pressure may cause damage to these items.

Flammable articles: Some flammable articles, such as cotton and cloth, cannot be sterilized by high-pressure steam, because high temperature and high pressure may cause fire.

Corrosive articles: Some corrosive articles, such as concentrated acid and alkali, cannot be sterilized by high-pressure steam, because high temperature and high pressure may make corrosive articles more active and cause damage to equipment.

In short, when using high-pressure steam sterilization, it is necessary to know the characteristics and tolerance of various items to ensure safe and effective sterilization.