New method using ⁵¹Cr for continuous monitoring of fluid shift between vascular space and perivascular space during cardipulmonary bypass

Abstract

Continuous monitoring of circulating blood volume become possible using ⁵¹Cr. Adding that, intracorporeal volume and extracorporeal volume are respectively measured. We can also measure hematocrit, using impedance method, and plasma colloid osmotic pressure, using semipermeable membrane. It is well known that edema occurs after cardiopulmonary bypass. Edema can be explained fluid shift from intravascular space to perivascular space. And this driving force is summarized by the Starling's hypothesis. According to this new method, we can measure the intravascular Starling's force continuously, and also actual volume of fluid shift.