Folks, please! You have got to start being more aggressive with screeners who refuse to comply with reasonable requests supported by policy. If this was MY medical device, I would have grabbed the device and/or the bag away from the screener and yelled for a supervisor - grabbing the bag or item away from them is the only way to get their attention and it truly drives them absolutely crazy, so be prepared for a fight....

....but if it was MY medical device, and I expected to put any portion of it or its contents in or through my body, rest assured I would maintain total control over where it goes and how it's handled.

Remember your escalation paths at the checkpoint!

1) supervisor
2) duty manager
3) FSD (if on site)
4) your airline's Ground Security Coordinator (GSC)
5) Airport Director's Office (if open)
6) local police if 5) is closed, AND you can trust the local police, which you often can't - so be careful with this one

The GSC can override the TSA and let you fly, while the Airport Director can override the TSA on customer service issues, getting the FSD involved or onsite, if necessary