Freelancer:
ydimoulis
Nature's Way
Considering the design is intended as a medical device, I decided to take a biologically/anatomically aware route. The back is curved to fit the spine ergonomically, with the seat fitting to the same curvature. Incidentally, the curve on the seat serves to force the user's knees upward, into an anatomically ideal position for defecating. The bottom of the toilet also comes out a few inches, allowing for the user to place their feet in an elevated position, further raising the knees and allowing for a more comfortable experience.