I realise that you can make a saline solution this way but would you still be worried about any pyrogenic effect due to residual bacterial cellular material after lysing the cells?
Obviously its not being used intravenously but even so would there be an effect on the healing of the wound?
I can't see it being clinically significant! It's still going to be better than being held down and hosed with Dettol.
I have used bog standard tap water and table salt intravenously to no ill effect in cows

