Correlation between peripheral and central venous pressures in children with congenital heart disease

Area of Science:

• Pediatric Cardiology
• Critical Care Medicine
• Hemodynamics

Background:

• Central venous pressure (CVP) is crucial for assessing intravascular volume and cardiac function but is invasive, carrying risks like infection and pneumothorax.
• Congenital heart disease (CHD) in children often necessitates hemodynamic monitoring, including CVP.
• Alternative, less invasive methods for CVP estimation are needed in this population.

Purpose of the Study:

• To compare CVP measurements obtained via central catheters with peripheral venous pressure (PVP) in infants and children diagnosed with CHD.
• To determine if PVP can serve as a reliable surrogate for CVP in this specific pediatric cohort.
• To establish a predictive relationship between PVP and CVP for clinical application.

Main Methods:

• Simultaneous measurement of CVP and PVP in 45 pediatric patients with CHD undergoing right-sided heart catheterization.
• Analysis of the difference between central and peripheral measurements.
• Development of a linear regression model to correlate PVP with CVP.

Main Results:

• A mean difference of 8 +/- 4 cm H2O was observed between central and peripheral CVP measurements.
• A statistically significant linear regression equation was derived: CVP = 0.32 PVP + 3.8 (r = 0.67; p < 0.005).
• No significant influence on CVP measurement accuracy was found based on patient age, body metrics, or CHD type.

Conclusions:

• While peripheral venous pressure (PVP) measurement is less accurate than central venous pressure (CVP) in pediatric CHD patients, it offers a valuable estimation.
• The established linear regression equation provides a reliable method for estimating CVP using PVP in this population.
• This approach may reduce the need for more invasive central catheterization in certain pediatric cardiac patients.