OIC..well it could be the syrinx causing the bladder issues too....TC does not always show on MRI's but can be detected by looking at bowel and bladder function with a urodynamics test, and the length of the brain stem, where the conus ends, and symptoms.......
I understand ur hesitation at listening to this dr...is goes against everything I have heard or read regarding chiari....
Chiari symptoms can be triggered by a fall, or even a bumpy car ride,even straining too much with a BM can trigger chiari symptoms.
We do have a list in the Health Pages as to what should be avoided, and it goes for b4 and after surgery.-
http://www.medhelp.org/health_pages/Neurological-Disorders/Activities-to-avoid-with-Chiari-and-Syringomyelia/show/986?cid=186
Brain slump can cause more issues most times, and is an indication of a redo being needed...I am confused by ur DD's condition and symptoms at this time too!!
"selma"