Stuff like that has been around since I was young and handso... OK, at least since I was young.
One of the varied duties I had when employed by the Dept. of Corrections was to do security audits. We'd load up with all sorts of contraband and see how far inside the facility we could get. (Yes, we would stop before we got deep into direct physical contact with the inmate population. No sense getting killed over a few toys.)
Knife, knife disguised as a pen, pen gun (no rounds), 100 cc of THC resin conjugate (phony stuff used for drug dog training), 20 g of cocaine conjugate, 20 g of PCP conjugate, 3 handcuff keys, 4" spring steel strip good as lock shim/jimmy, and a cell phone through the visitor's entrance, past the regular visiting room into the no-contact visiting area and into the inmate toilets. The only thing that was not "normal course of business" was that I was processed before any other visitors and before inmates were called to the visiting room. To say I have little faith in a hands-on search finding stuff would be an understatement. Heck, yes, I'm opting for a probulation as opposed to the nudiscope!
There is a common article of clothing (not underwear) that is almost never checked. Having a pacemaker/defibrilator (or at least the security notification card for one) makes it even less likely it will be checked. PM me if you want to know what it is.
stay safe.