I am not sure what you aleady have in place, but the first step is to define the types of band aids (plasters in the UK) that you will permit, and these are commonly the blue metal detectable variety.
The next thing to do is to ensure that only this type is purchased which will involve explaining the policy to whoever buys them.
For some Food Safety Standards there is a requirement to pass one of the plasters from each batch through a
metal detector if you have one.
The plasters will need to be located where they are accessible when needed and most companies have a first aid cabinet or similar. These should be kept locked and only nominated individuals having the key. I don't know the situation in th US but in the UK there needs to be a minimum number of trained first aiders depending upon the size of the workforce and the keys should ideally be restricted to these first aiders.
You obviously need to make the plasters available when needed, but the thing to avoid is allowing everybody free access to the plasters.
The plasters are only intended for minor cuts, anything more serious and the individual should go to hospital. When somebody gets a cut they will need treatment from the first aider, and where appropriate a plaster applied. The first aider should make a record of the injury and the treatment given as part of your Health & Safety obligations and this is where the issue of a plaster can be recorded, including a log of the number used.
Finding somebody else's used plaster in your food is probably the most unpleasant foreign body complaint you could come across, and believe me it happens. Your staff need to be trained to report the loss of a plaster and an appropriate search and action implemented. One technique I have used is to write the individual's name on the plaster. That way, when you find it on the floor or it comes back as a complaint you know who to fire!
