Donatello had learned from a young age that it was always best to be prepared - especially where his brothers were concerned. If it wasn't Leo training until he collapsed from exhaustion, then it was Mikey coming home with a broken arm after falling off his skateboard. And then of course there was Raphael, the brother Donnie had patched up more times than he cared to count; the hot-headed title who always seemed to be coming home battered and bloody. He was the one Donnie always felt he had to prepare most for, and why it seemed he was always having to re-inventory and restock their medical supplies.
And since their most recent encounter, Donnie knew exactly what item he would be keeping plenty of stock of.
He sighed as he finished putting together the emergency field kit, "...Bandages, antiseptic, suture kit...and two rolls of duct tape."