Relationship between end-tidal pressure of CO2,transcutaneous partial pressure of CO2 and arterial par-tial pressure of CO2 in pediatric patients with congenital heart disease / 临床麻醉学杂志

ABSTRACT

Objective To evaluate the relevance of PET CO 2 ,TcPCO 2 and PaCO 2 in pediatric patients with congenital heart disease.Methods Eighty pediatric patients with congenital heart disease were scheduled for elective cardiac operation with cardiopulmonary bypass,aged 1 month to 5 years, 42 male and 38 female,were divided into 4 groupsgroup N1,cyanotic type congenital heart disease with severe pulmonary hypertension;group N2,cyanotic type congenital heart disease without pul-monary hypertension;group N3,non-cyanotic congenital heart disease with severe pulmonary hyper-tension;group N4,non-cyanotic congenital heart disease with mild pulmonary hypertension or normal of pulmonary artery pressure,20 cases in each group.The same anesthesia methods were selected in each group.PET CO 2 ,TcPCO 2 and PaCO 2 before operation were recorded,and the relevance among them was analyzed.Results In groups N1,N2 and N3,the differences of PET CO 2 and PaCO 2 were significant,,while the difference was relatively small in group N4;the difference of TcPCO 2 and PaCO 2 were relatively small between the four groups.In Groups N1,N2 and N3,the values of TcP-CO 2-PaCO 2 value were significantly less than that of PET CO 2-PaCO 2 ;in group N4,TcPCO 2-PaCO 2 value was obviously higher than that of PET CO 2-PaCO 2 values (P 0.05,0.02

analysis of TcPCO 2 with PaCO 2 revealed R2 in the N1,N2,N3,N4 group were 0.750,0.827,0.835 and 0.691 (P <0.01).Conclusion The relevance of PET CO 2 and PaCO 2 is poor in pediatric patients with congenital heart diseases,either increased blood flow to the lungs or right to left shunt,except for children with congenital heart disease of left to right shunt.TcPCO 2 used in monitoring children with congenital heart disease is well correlated with PaCO 2 and is more suitable for the noninvasive monito-ring of CO 2 with congenital heart disease in children.