The protocol for the blood volume monitor group included monitoring of oxygen saturation, control of intradialytic extracellular volume, and establishment of a normalized extracellular volume using plasma refilling rate
During haemodialysis, as fluid is removed from the intravascular space, fluid from the interstitial space moves into the intravascular space, known as the plasma refilling rate
(PRR) (Amato, et al.
This can cause an imbalance between the ultrafiltration (UF) rate and the plasma refilling rate
of the patient (Dasselaar, Huisman, deJong, & Franssen, 2005).