Figure 2.

Relative blood volume patterns Linear flat line in a patient who is substantially volume overloaded and no change with ultrafiltration (Green line). Patient with stable downward trend so plasma refill is being compensated during ultrafiltration (Brown line). Initial fall in relative blood volume because of reaction with dialyzer, and then stabilization (Black line). Patient decompensating as sudden steep fall in relative blood volume, as plasma refill does not keep pace with ultrafiltration (Purple line).