It has recently come to the attention of the Safety Committee of a potential issue regarding two different drug ampoules that look very similar. The drugs in question are Heparin and St. Thomas’s Cardioplegia. The Safety Committee would strongly recommend the use of double-checking for all drugs that are used by the Perfusionist. If you have experience of this or different drug ampoules causing potential confusion please use the Web Reporting form on this site to let us know.