Traveling with vest

I'm just checking to see what everyone else's experience was flying with the vest machine in tow. It is for my 3 yr old, and wonder what obstacles I might face with TSA or the airport. I will be flying with my 3 and 5 yr old so I need to be prepared on what to expect.
Source: Cystic Fibrosis Airway Clearance Techniques Forum - Category: Respiratory Medicine Authors: Tags: Airway Clearance Techniques Source Type: forums