"Failed" means that circulation could not be established to the tissue graft, so it had to be removed. I have had three surgeries this week.
Right now, you may be either flinching or whimpering. You are probably on the verge of saying something like "oh, honey!" Please get that out of your system at home. When you see me, I will want to talk about other things, like Sleepy Hollow or sock knitting.
Please consider that an order.