Passengers with metal in their bodies.
Given the high incidence of elderly people having hip/knee replacement surgery these days and the problems associated with having metal inside one's person when travelling by air I was interested in what the protocols at airports, mainly in Australia, are when the scanner goes off. Obviously the passenger would inform security about their medical procedure but what do the security people do then? Do they, for example, do a search with a hand held scanner and establish that indeed the passenger does have a metal knee etc. or do they go straight to a full pat down procedure ?