I went through security 4 times on the GFMPH trip in September. Rochester had the fancy "hands in the air" tube.
Rochester and Atlanta both "saw" the pads and patted me down. The excitement generated by my stash of pads in the carry-on bag actually caused more chaos. I'm not sure what a dozen pads look like on an x-ray screen, but they didn't like it, and I had to open the bag. The poor TSA lady was embarrassed, the guys were sheepish (I reminded them to look around in the breakroom later, 1 in 6 would be packing the same way in a few years - offered to give them a sample, and they vanished).
Actually my Calypso markers seemed to set machines off that I have been through many times without issue. They couldn't figure out what they were "detecting", but once I explained it, they let me go on. In theory they shouldn't show up, but ....
I've not been overseas since surgery.