Sensible would be nice.
After an incident a few years ago our policy is ridiculously over the top.
I posted an explanation but deleted it as it was going to be too long.
Suffice to say we have:
Coloured rods
Coloured padlocks - only techs have the key
Coloured labels
A laminated sign
Electronic notification of isolation with names of staff (and patient if required) and reasons.
Electronic de-isolation requests.
Don't get me started on machines with blood spillages