Effects of Three Different Positions on Central Venous Pressure of Patients with Normal Heart Function

Objective To compare the values of central venous pressure(CVP) measured in different positions of patients with normal heart function,to explore the relationships among CPV values and to provide methods for measuring the value of CVP for patients unable to lie down.Methods With open measurement of central venous pressure,the measurement of CPV was conducted in 0°,45° and 90° respectively for 116 patients,and randomized blocks analysis of variance,paired t test,correlation analysis and linear regression methods were used.Results Values of CVP measured in three positions all had a significant difference(F=9.303,P= 0.000) and values of CVP measured in 0° and 45° showed a significant difference(t=7.186,P=0.000) with the correlation coefficient of 0.895,the regression equation of =1.002X+0.713.Meanwhile,values of CVP measured in 0° and 90° revealed a significant difference(t=8.102,P=0.000),with the correlation coefficient of 0.864,the regression equation of =0.835X+2.725.Conclusion CPV measuring of patients with normal heart function can be conducted in not only 0°,but 45° and 90°,and the values of CVP measured in 45° and 90° should be transformed into the value in 0° through regression equations for clinical guiding,which is suitable for CVP measuring for patients unable to lie down.