I work for HemCon Medical Technologies and I wanted to take a moment to clear a couple of things up. As for the shellfish allergy issue, there really is not one. It is true that the active ingredient, chitosan, is derived from shrimp shells, but the iodine and shrimp proteins have been removed. In over 2 million deployments of the bandage, there has never been a reported case of shellfish allergy. The original bandage was a wafer style, but you might want to check out the Chitogauze product. It is a gauze substrate with chitosan baked onto it.
If I can answer any future questions, please let me know. You can reach me at email@example.com.