To be perfectly honest, I dont think it would make any significant difference.
It may mobilize a smidge more creatinine - so what …
And, it may mobilisze a little more muscle phosphate - all the better as that may allow more to be removed …
And, it shouldnt make material difference to the urea levels (for those who care a jot about Kt/V or PRU - which I don’t - at least, I don’t in the kind of dialysis you are accessing … which is home dialysis at an already far higher frequency and/or duration than most facility-based patients get and where, arguably, Kt/ or PRU may be more useful subsistance dialysis markers).
So … I think this post - though a good question that needs an answer - is really a storm in a tea-cup about nothing.
Massage helps patients. It makes them feel better. It makes their muscles, their joints, their bodies feel better. It helps to relieve cramp … though I would contend that cramp, in good dialysis, should be a minimal, if any, problem.
I really don’t have an issue with it - bloods or no bloods - and if the minimal effect of massage on bloods were to be significant in changing dialysis interpreatation, then it is not the massage that is wrong but the dialysis prescription and the dialysis delivery.
My view? … massage with neither fear nor anxiety.
If it helps - and it usually does (in many ways) … do it.