血气分析参数.doc

12附录计算值计算值尽可能和有意识地按NCCLS标准。AVL Compact3中有以下计算值。方程式碳酸氢根浓度血浆中碳酸氢根浓度CHCO3- = PCO2 10pH-7.608mmol/l血中CO2总量血浆中CO2浓度是溶解的CO2与碳酸氢盐之和CtCO2 = CHCO3 + 0.0307 PCO2 mmol/l血液中碱液 BEactBEact =(1-0.014 cHb )cHCO3-24.26+(1.63cHb+9.5)(pH-7.4)-0.2cHb(1-SO2)mmol/l剩余碱BE = (1-0.014 cHb)cHCO3-24.8+(1.43cHb+7.7)(pH-7.4)mmol/l细胞外液碱 BEecfBEecf = cHCO3-24.8+16.2(pH-7.4)mmol/l缓冲碱BB = BE+41.7+0.42 cHbmmol/l标准 pH-值pHst =pH+(0.8262-0.01296 cHb+0.006942 BE)*lg(0.025 PCO2)pH-unit标准碳酸氢根cHCO3-st = mmol/l氧饱和度(有效的) SO2=cO2Hb/(cO2Hb+cHHb)No COOX-data present:O2sat= withlg Q = 2.9 lg PO2k + F1 -F3lg PO2k = lgPO2 + 0.48(pH - F4) - lg(P50/F5) + 0.0013 BEadult: F1 = 1.661F2 = 0.074F3 = 4.172F4 = 7.4F5 = 26.7fetal: F1 = 1.3632F2 = 0.0533F3 = 4.113F4 = 7.2F5 = 25.0氧含量 (动脉)COOX-data present:O2cont= O2ct (Oxi) + 0.00314 PO2ml/dLNo COOX-data present:O2cont = 1.39 cHb O2sat + 0.003 PO2ml/dLSO2=f(PO2, pH, P50, a/f, BE)肺胞氧分压AaDO2t=PAO2t-PaO2tPAO2t = (Baro-pH2Ot) FIO2 - PACO2tFIO2+(1-FIO2)/RQfor pAO2 PO2, otherwise pAO2 = PO2pH2Ot=47*10exp(t-37)(0.0237-0.0001(t-37)PACO2t=PaCO2tmmHg氢离子浓度cH+ = 10(9-pH)nmol/l标准离子钙nCapH=7.4 = Ca*10expF5(pH-7.4) 0.22 血 AVL Compact3 仅计算血参数F5= 0.24 血清/血浆mmol/l病人体温的PO2 PO2t = PO2 10exp(t-37)(5.49*10exp(-11)*PO2exp(3.88)+0.071)/(9.72*10exp(-9)*PO2exp(3.88)+2.3)mmHg病人体温的PCO2 PCO2t = PCO2 mmHg病人体温的pH pHt = pH-(t-37) (0.0147+0.0065 (pH-7.4)pH-unit下列方程式的测量值和输入值单位: pHpH-unitP50mmHgPCO2mmHga/f-PO2mmHgRQ-tHbg/dlFIO2-单位的转换O2cont1 vol% = 0,4464 mmol/ltHb1 g/dl = 10 g/l = 0.6206 mmol/l Baro1 mmHg = 1.3333 mbar = 0.1333 kPa名词缩写a:arterial-d动脉v:venous-静脉A:alveolar-肺胞t:patient temp