Re: bladder spasm
I too have a atonic neurogenic bladder and have been self cathing for about 11 years. I deal with urethral spasms periodically and yes it is impossible to get the catheter in. My urethra will also spasm with every bowel movement, if there is anything in my bladder so I TRY to cath if at all possible before a bowel movement to avoid the spasm. This isn't an easy task when you have chronic diarreha so I do understand what your feeling.
My bladder never regained function after having a hysterectomy with bladder sling surgery at the age of 33. I delt with alot of spasms at that time. Ask your doctor about maybe perscribing you an "antispasmotic" to see if that may help your situation. I'm not sure the name of the one they had given me way back then but it was one you put under your tounge, like you would take a nitro for the heart. The idea was that you only took one and let it desolve under your tounge IF your bladder was spasming. So you didn't have to take a pill that worked systemically every day whether you needed it or not. This gives YOU some control as to when YOU need that extra help stopping the spasm. Just a thought.
I hope this helps some, and please let us know how you make out.
Take care, and God bless.