Whenever a medical item such as a syringe or rag/bandage is ruined and used to create something such as a splint or a filled syringe, it'll give you a "Such and such is ruined" message but still create the splint or filled syringe, as well as keep the original ruined item.

Because of this, it is possible to repeatedly use the same ruined rag on wooden sticks to create an infinite number of splints, and the same goes for ruined syringes and vials. {F29002}