Variations on the foam cutout or outlines of tools have been in workshops for at least a century, as good tools are expensive. Its not done everywhere as it’s a

Variations on the foam cutout or outlines of tools have been in workshops for at least a century, as good tools are expensive. Its not done everywhere as it’s a pain to setup, and you need discipline to keep following it. Preventing surgical instruments is easier the more expensive the tool is. Anything over $5 can easily get a RFID tag and you can simply scan the patent then the work area to get accountability. The hard part is with gauze and other cheap items that can’t easily be tagged, and will be going inside the body, so they have very high biocompatibility requirements (eg: inks in spectrum transparent to blood might be too toxic to use).