In the last two decades, there has been intense interest in using perfluorochemicals (PFCS) as “artificial blood”.'Perfluorinated ethers and amines generally form mor3 stable PFCS- based emulsions than do perfluorinated alkanes. 2 However, previous animal studies have indicated that due to some kind of interaction with liver tissues, possibly baselike interactions, perfluorinated amines or ethers exhibit extremely long or infinite retention in ...