Actually, it was only stated it must have been repaired before because it was apparently old, but then the very same dude that said this changes his mind and thinks even construction may count as a repaired wound. It's also pretty directly implied both her and Gagamaru were directly responsible for the destruction of the Hanokiwa General Hospital for which we have no timeframe of it existing, but they were there 3 years after the farthest point in time we know the hospital was operational. That's not enough time for any building to get so much damage it would be completely crumbled into pieces. And perhaps, I don't know... they didn't pass out and fall unconscious because they had never done that from any of the wounds they got all across the series? That's just an stamina feat for them, not proof that Accelerator won't be affected like this.
Yes, slowly tire himself out with all the mental and physical wounds he has ever been inflicted, including a head wound that left him unconscious and requiring special equipment to compensate for his motor and verbal skills months later.
And again, that still needs a CRT.