• Gregory A Nuttall, Linda C Stehling, Christopher M Beighley, Ronald J Faust, and American Society of Anesthesiologists Committee on Transfusion Medicine.
• Division of Biostatistics, Mayo Clinic, Rochester, Minnesota 55905, USA. nuttall.gregory@mayo.edu
• Anesthesiology. 2003 Dec 1;99(6):1433-43.

BackgroundThe last published survey of transfusion practices among members of the American Society of Anesthesiologists (ASA) was conducted in 1981. The ASA Committee on Transfusion Medicine conducted a new transfusion survey in 2002.MethodsThe survey was mailed to 2,500 randomly selected active ASA members. The previous survey was modified to incorporate questions based on the ASA Practice Guidelines for Blood Component Therapy. The chi-square test was used for comparisons. Two-tailed P values of 0.05 or less were considered as nonchance differences.ResultsA total of 862 survey responses were completed by anesthesiologists who provided or directly supervised anesthesia for patients who may have required transfusion. In a given week, 62% rarely or never transfused 3 or more units of blood to the same patient. The percentage of anesthesiologists who responded that it is never or rarely (1% or less of the time) necessary to cancel elective surgery because of unavailability of blood products was 96% in 2002. In 1981, 92% responded that it was rarely necessary, and 8% said that it was occasionally necessary. The percentage of anesthesiologists who required patients undergoing elective surgery to have a hemoglobin concentration of at least 10 g/dl decreased from 65% to 9% (P < 0.001). Before intraoperative erythrocyte transfusion, 89% of respondents performed hemoglobin or hematocrit determinations routinely or sometimes. Intraoperative autologous transfusion equipment availability increased from 39% to 95% (P < 0.001). Awareness of the ASA Guidelines was 72%.ConclusionsTransfusion practices have changed considerably since 1981. Current transfusion practices are, in general, consistent with the ASA Guidelines.

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