Which of the following techniques does not promote medical asepsis?

The technique that does not promote medical asepsis is sitting on a patient's bed. Medical asepsis, also known as clean technique, involves practices aimed at reducing the number and spread of pathogens. Sitting on a patient's bed can compromise this effort, as it introduces potential contaminants from clothing or skin to a surface that should be kept as clean as possible.

In contrast, practices such as holding food trays away from your body, cleaning all reusable equipment immediately after use, and washing hands before performing any procedures are all essential components of medical asepsis. They help to minimize the risk of infection by ensuring that surfaces and items remain uncontaminated and that the caregiver maintains good hygiene practices.