[Analysis of an information network].

This study, performed in the Loire-Atlantique region, gives a full list of the positions responsible for the transfer of information and the methods of implementation. It demonstrates that mobile blood collection units and numerous blood donor associations, although in close contact with donors, represent the weak link in the information network. This weakness has its origins in a lack of communication with the central sources of information, and in the absence of participation in various projects. The study emphasizes the importance of communication in addition to the responsibilities of the members of the organization.