My home patient has a decub that just won't heal. He is a teen paraplegic and the wound is on his buttock. He's been on bedrest for 1+yrs (not totally compliant). It has almost healed but then just opens back up. It's been opened and sewn closed more that once. Silver nitrate has been tried....Wound vac, packing you name it. Any experience,insight, suggestions for this?