Although transfusion is certainly a common practice in PCPs, there is a relative lack of literature on this topic. Publications are unconnected and hardly any prospective studies have been performed. A large part of the little literature available only concerns descriptive and very general aspects of the issue. As transfusional products and financial and human resources are finite, it would be desirable to establish clear research lines on the different aspects considered (clinical, infrastructure, and ethical) that can help clinicians, nurses, patients, and carers to make a decision.