Difference of central venous pressure measured by femoral vein and subclavian vein

Central venous catheterization methods: internal jugular vein (commonly used), external jugular vein (with coagulation dysfunction), subclavian vein and femoral vein. (It is generally believed that the pressure measurement of superior vena cava is more accurate than that of inferior vena cava.)

Venous pressure is influenced by many factors, such as the distance between vein and right atrium, posture, respiratory movement, muscle movement, etc., which can increase or decrease venous pressure.

There was a linear positive correlation between femoral venous pressure and central venous pressure in the same patient (r=0.720, P < 0.01). The linear regression equation: y (central venous pressure) =0. 132+0.557X (femoral venous pressure), and the regression coefficient was t-tested, P < 0.05.