How fortunate you are with access to such a clinic.
I presume you like Chinese food - within my own experience with beansprouts - so long as they are fresh, i.e., super white, crisp, and have been properly washed and relieved of their seed husk [green bits] and they are stir-fried in a suitable oil [or even in a knob of butter] and one chews them thoroughly - then beansprouts are eaten and digested OK by most folk.
Water chestnuts - I have never prepared and cooked from fresh -- only tinned - where preserved within brine - again if they are not old and are still pure white - sliced or halved/quartered and properly stir-fried or baked - within other recipes or on their own - they are OK if well masticated!
I have had an ileostomy [following a panproctocolectomy] for nearly 45 years .....
It is only of recent date, following an excised novel TIES implant device, that reparative surgery has sadly - so far - failed to overcome the resultant hernias [2] that have transpired following the excision of the device that I now have symptoms of temporary [so far] blockage and pain following on from the most selective diet I am able to self-manage at the present time.
Hope this may help - others may of course have a different experience .... but these are likely to be the result of surgical or other concomitant factors - like extensive scar tissue or escape of bowel content etc.
On a diet-only related answer, I hope the above may be helpful.
BW
~ ~ ~ ~ ~ waves ~ ~ ~ ~ ~
from the UK
Jayne
edit:
BTW having just looked up your profile - ..... being within the medical profession - and given your own condition as described within your profile - I guess you are on top of some pretty interesting cutting-edge research concerning the vagus nerve [and nearby bundle of nerves] ..... guess you also practice certain yogic moves to help here too.
BW
J