How do you approach rectal spacer for the patient with renal failure?

Have not come across this but I would presume it would be filtered with dialysis in pts with renal failure.

As I understand it, SpaceOAR (Polyethylene Glycol - a simple organic molecule) is hydrolyzed over about 14 weeks. Furthermore, recalling organic chemistry class from about a century ago, hydrolysis of such a molecule primarily creates CO2 and H2O . . As such, to my knowledge, this is a 100% NON-issu...