Just a quick note, which I should have mentioned earlier. There’s an occasional regional difference when you’re talking about anatomical and/or ergonomic crutch handles. “Anatomical” and “ergonomic” seem to be used interchangeably on US sites to describe the broad handle that’s molded for each hand — anatomical because of the shape, and ergonomic because said shape evens out how your pressure is distributed. So, for instance, my crutch would be considered both.
On a few UK sites, however, “ergonomic” doesn’t mean “anatomical,” but rather refers to standard round or handlebar-type handles. When these sites mention anatomical handles, they will specify “anatomical” or “anatomic.” (See, for an example, Chic Aid.)