Transfusion
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Although blood utilization has been under considerable scrutiny for the past two decades, particularly for surgery, studies comparing perioperative blood transfusion practices between countries are rare, and the evolution of international standards remains unknown. Therefore, the objective of this evaluation was to compare the perioperative transfusion of blood components in cardiac surgery in multiple centers in different countries. ⋯ In cardiac surgical patients, marked variability in transfusion practice exists between centers in various countries and suggests differences in perioperative practice patterns as well as possible inappropriate use. International standardization of perioperative practice patterns as well as transfusion regimes appears necessary.
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Pediatric patients may require small-volume transfusions necessitating splitting of red cell (RBC) units. This process usually involves temporary storage of aliquots in pediatric blood bags or, in some cases, plastic syringes, until they are transfused. While many studies have been published on the efficacy of storage in blood bags, there is little evidence to show that RBCs are safe and effective for transfusion after separation into plastic syringe aliquots. ⋯ Irradiation and storage of aliquoted RBCs demonstrated expected but not significant changes in the in vitro variables. Storage for up to 24 hours in syringes does not have a greater detrimental effect on RBCs than storage in transfer bags, making products stored in either container safe for transfusion to pediatric patients.
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The surgical toolbox is expanding, and newer products are being developed to improve results. Reducing blood loss so that bloodless surgery can be performed may help minimize morbidity and length of stay. As patients, hospital administrators, and government regulators desire less invasive procedures, the surgical technical challenge is increasing. ⋯ In some cases, these materials may be stored in the blood bank, and their appropriate use may reduce demand for other transfusion components. The product classification used in this review includes hemostats as represented by product categories that include mechanical agents, active agents, flowables, and fibrin sealants; sealants as represented by fibrin sealants and polyethylene glycol hydrogels; and adhesives as represented by cyanoacrylates and albumin cross-linked with glutaraldehyde. Only those agents approved by the Food and Drug Administration (FDA) and presently available (February 2008) for sale in the United States are discussed in this review.
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The use of fresh red blood cells (RBCs) is recommended for critically ill patients and patients undergoing surgery, although there is no conclusive evidence that this is beneficial. In this follow-up study, the short-term and the long-term recovery of irradiated, leukoreduced RBCs transfused after either a short storage (SS) or a long storage (LS) period were compared. By consecutive transfusion of RBCs with a SS and LS period, a direct comparison of their survival within the same patient was possible. ⋯ The mean 24-hour PTR of both SS and LS RBCs complies with the guidelines, even in a compromised patient population. The 24-hour PTR of SS RBCs, however, is significantly higher than that of LS RBCs. The remaining population of SS and LS RBCs has a nearly identical long-term survival. Therefore, depletion of the removal-prone RBCs before transfusion may be an efficient approach for product improvement.
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Letter Case Reports
Streptococcus pneumoniae septicemia associated with red blood cell transfusion.