Methods:Plasma bactericidalpermeability increasing protein(BPI) levels and BPI levels released by PMN activation in vitro were detected by enzymelinked immunosorbent assay and both BPI/PMN ratio and BPI (in vivo)/BPI(in vitro) were calculated.

• 计算血浆BPI水平与循环血PMN数量的比值，以及BPI与PMN体外释放量间的比值。