What bladder constraints do you use for prostate cancer patients who have a completely empty bladder?

There are some situations where there really is no urine in the bladder for which empty bladder constraints are needed. However, the vast majority of the time empty bladder is due to incontinence after prostatectomy. This is an especially important situation since a portion of the bladder is in the ...

I recently treated a dialysis patient with 70/28. I discussed in consult a higher risk of GU toxicity due to the inability to do full bladder given his (nearly) anuric state.

He had worse bladder dosimetry than published guidelines due to his condition, but I would not sacrifice PTV coverage signifi...