How must instruments and supplies used on a client be handled?

In the context of infection control and sanitation practices, proper handling of instruments and supplies used on clients is critical to ensure safety and hygiene in any treatment environment. The correct approach is to place used instruments and supplies in a labeled receptacle designated for contaminated items. This method not only helps in effectively segregating waste but also ensures that the items can be processed correctly for cleaning and sterilization later.

Labeling the receptacle communicates to all personnel that the contents are potentially hazardous and should be handled with care, thereby minimizing the risk of cross-contamination. Proper disposal practices align with regulations set forth by health and safety authorities, which emphasize infection control and sanitation standards.

The other options do not adhere to these fundamental safety protocols. For example, reusing instruments without any cleaning compromises safety and sanitation. Storing used instruments in the primary work area poses a risk of contaminating that space and any clients or staff in the vicinity. Rinsing instruments with water only does not effectively eliminate pathogens and could lead to improper sanitation if not followed up with appropriate cleaning and disinfection methods.