Heteroagglutinins and their significance in baboon hepatic xenotransplantation

The role of preformed xenoreactive antibodies in xenograft recipients is unknown. Humans and baboons possess red cell agglutinating activity associated with isohemagglutinins and heteroagglutinins (HA). We examined the role of HA in two patients who received ABO-identical baboon livers. Human antibaboon HA were assessed by correlating serial titers with studies for rejection. Serial direct antiglobulin testing (DAT) was used to detect baboon antihuman HA, potentially produced by transplanted passenger lymphocytes. Patient 1 survived 70 days. The human antibaboon HA titers remained essentially unchanged from preoperative values. Although hyperacute rejection did not occur, and there was only mild cellular rejection, liver function was suboptimal. Postreperfusion immunoglobulin and complement deposition and histologic changes suggested complement-mediated injury. DAT testing was negative except for passively acquired anti-A from transfusion. At autopsy there was marked bile stasis, but no rejection. Patient 2 survived 26 days with essentially unchanged HA titers until preterminal. Although there was no hyperacute rejection and only mild humoral rejection (without cellular rejection), suboptimal liver function and bile stasis were again noted. Postreperfusion immunoglobulin and complement deposition again suggested com-plement-mediated injury. DAT testing was negative. At autopsy there was no rejection. Human antibaboon HA do not appear to be associated with hyperacute or cellular rejection, but their role in the complement-mediated injury, suspected in both cases, cannot be definitively excluded. Baboon antihuman HA were not detected in either patient. © 1995 by Williams and Wilkins

A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

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Trends in red blood cell transfusion and 30-day mortality among hospitalized patients

Background Blood conservation strategies have been shown to be effective in decreasing red blood cell (RBC) utilization in specific patient groups. However, few data exist describing the extent of RBC transfusion reduction or their impact on transfusion practice and mortality in a diverse inpatient population

Trends in red blood cell transfusion and 30-day mortality among hospitalized patients

Background Blood conservation strategies have been shown to be effective in decreasing red blood cell (RBC) utilization in specific patient groups. However, few data exist describing the extent of RBC transfusion reduction or their impact on transfusion practice and mortality in a diverse inpatient population