AAMI ST91:2015 is a standard published by the Association for the Advancement of Medical Instrumentation (AAMI) that provides guidelines for the steam sterilization of medical devices. The standard outlines the requirements for steam sterilization processes, equipment, and materials used in healthcare facilities.

The AAMI ST91:2015 standard covers a range of topics related to steam sterilization, including cycle selection, packaging and loading of medical devices, sterilizer performance, and process monitoring. It also provides guidance on the validation and maintenance of steam sterilization equipment and the documentation requirements for sterilization processes.

The standard includes detailed guidance on the physical and chemical parameters of steam sterilization, such as time, temperature, pressure, and humidity. It also provides guidance on how to evaluate the effectiveness of the sterilization process, including the use of biological indicators and other monitoring techniques.

AAMI ST91:2015 is an essential resource for healthcare facilities, medical device manufacturers, and sterilization service providers to ensure the safe and effective sterilization of medical devices. The standard is updated periodically to incorporate the latest research and best practices in steam sterilization technology.