Perfectly understand your concern. However, the RAI Manual
does not specifically exclude dialysis AV shunt sites.
The difference is that a dialysis shunt
is PLACED SURGICALLY--and, obviously, requires different observations and can have far different complications. A central IV line, a PICC line, and a peripheral IV are NOT placed surgically (though a surgeon may place the line, and an x-ray may be taken to confirm proper placement.)

Hopefully, MDS 3.0 will provide more clarity in each item so that we do not have to "guess" or presume the item intent.
Nursing News