From the TSA website:
Children with Disabilities
Travelers with Disabilities and Medical Conditions
Parents or guardians of children with disabilities should...
* Inform the Security Officer if the child has any special needs or medical devices.
* Inform the Security Officer if you think the child may become upset during the screening process as a result of their disability.
* Offer suggestions on how to best accomplish the screening to minimize any confusion or outburst for the child.
* Ask the Security Officer for assistance during the process by helping you put your and the child's carry-on items on the X-ray belt.
* Know that at no time during the screening process will you be separated from your child.
* Know that if a private screening is required, you should escort and remain with your child during the private screening process.
* Tell the Security Officer what are your child's abilities are. For example: can the child stand slightly away from equipment to be handwanded, walk through the metal detector, or needs to be carried through the metal detector by the parent/guardian.
* Know that all no time should the Security Officer remove your child from his/her mobility aid (wheelchair or
scooter). You are responsible for removing your child from his/her equipment at your discretion to accomplish screening.
* Know that if your child is unable to walk or stand, the Security Officer will conduct a pat-down search of your child while he/she remains in their mobility aid, as well as a visual and physical inspection of their equipment.
And you never know what the TSA twits will do. See the following:
http://www.king5.com/video/featured-index.html?nvid=206446&shu=1