Colloid Osmotic Pressure in Patients With Fontan Circulation

Children born with univentricular heart will go through step surgery and end up with a Fontan circulation. A circulation with cause problems with body fluid balance.This project will evaluate changes in interstitial colloid osmotic pressure in patients 10 year after completion of a three step Fontan surgery. This project will evaluate whether increased micro vascular leakage and change in interstitial colloid osmotic pressure are present in patients after ten years with a Fontan circulation.