Is pulmonary endothelial permeability increased by fluid from packed red blood cell units but not by fluid from clinically-available washed units?
Fluid from stored PRBC units contains a soluble, transferable factor that directly increases endothelial permeability. Fluid from washed PRBC units, currently available for patients with immunoglobulin A allergies, does not. This study complements previous work of others that demonstrated that neutrophil priming by PRBC fluid is abrogated by washing. Now that two cell types have been shown to respond more favorably to washed PRBC in vitro, clinical studies should be initiated to investigate whether use of washed PRBC reduces ARDS following transfusions in trauma patients.
Modest time intervals from imaging to surgery are not significantly associated with change in tumor size; thus, patients may undergo preoperative work-up without experiencing significant disease progression.