Provodine/iodine and a large syringe, without the needle.
Mix the povodine/iodine with water in your cook pot and use the syringe to irrigate the wound.
Several years ago I read a pretty good article on backcountry first aid, written by an ER/trauma doc who also served on search and rescue teams. When discussing backcountry first aid kids, he opined that you can makeshift just about anything, but that wound irrigation and splints were difficult (more difficult in the field than in your typical first aid class), and recommended a SAM splint and tape (duct or med) along with the irrigation tools mentioned.
