T3+ or poor KPS, we don't use SpaceOAR.

At the time, I use Hydrogel for brachytherapy patients, after evaluation of the space between the prostate and rectum.

Good mix of responses (including my own) in this similar thread: https://www.themednet.org/question/14074   In regards to brachy (not extensively discussed in other thread) - it is generally easy enough to place it immediately after the seeds (if LDR) or needles (if HDR) have been placed with...

Those on next generation anticoagulants (i.e., not ASA) or those with inflammatory bowel disease (those are the indications that CCO pays for the kit).