Acute kidney injury (AKI) is a potential complication of cardiac surgery. In animal models,
excess exogenous Cl- ion in the bloodstream is associated with AKI. Normal saline IV fluid
has higher levels of Cl- ion than the blood usually carries. An alternative IV fluid sold
under the name Isolyte has lower Cl- ion levels. There is no literature comparing AKI
outcomes in cardiac patients between patients receiving normal saline vs. Isolyte. The
investigators propose to recruit and randomize 30 trial-completing cardiac surgery patients
(up to 40 enrolled) into 2 study arms and compare renal outcomes.