Great advice given. I've no experience with these medical conditions, so I'll refrain, but I do love Japanese bondage!
Here are a few pages in the library with some great links and information on japanese bondage:
http://www.bdsmlibrary.com/forums/sh...t=rope+bondage
http://www.bdsmlibrary.com/forums/showthread.php?t=4248
http://www.bdsmlibrary.com/forums/showthread.php?t=8832
good luck!