Pneumocystis carinii in bronchoalveolar lavage fluid and bronchial washings

Secondly, all hospitals should establish clear and coordinated managerial responsibility for the transfusion process.Thirdly, transfusion laboratories should be required to have a procedure for recording all transfusion errors and the corrective action taken and to report regularly to the proposed national scheme.Fourthly, statistics on the number of blood units transfused and the number of patients who receive transfusions should be collected and reported nationally to provide denominators for any reporting scheme.Finally, pilot projects should be set up to identify and report cost effective ways of improving the safety ofthe clinical transfusion process.We thank the organisers of the national external quality assurance scheme in haematology, which distributed the questionnaire and the final report to all hospital transfusion laboratories in Britain.