Abstract
BackgroundThe hyperchloremic metabolic acidosis triggered by the infusion of normal saline (NS) significantly increases the level of extracellular potassium. In this study we assessed the influence of proportion of NS administered in the perioperative period of renal transplantation on potassium levels in usual clinical practice. MethodsThis study was a retrospective cohort analysis of patients undergoing renal transplantation during a 24-month period (2015–2016). To determine the influence of NS on K+ levels, simple linear regression and multiple linear regression analyses were performed, adjusted for the total volume of fluids administered, establishing the difference in serum K+ levels for each 20% increase in the proportion of NS. ResultsAs the proportion of NS administered increased, K+ levels at 24 hours were significantly increased (P = .026) (0.69 mEq/L K+ increase per 20% increase in NS ratio). Mean K+ values at 24 hours (adjusted for total volume of fluids administered) ranged from 4.17 mEq/L (95% confidence interval [CI] 3.7–4.56) in patients who did not receive NS to 4.85 mEq/L (95% CI 4.56–5.15) in those administered exclusively NS. ConclusionThe risk of developing hyperkalemia in patients who receive a balanced solution with potassium in its formulation compared with NS in the perioperative period of renal transplantation is not increased, but the volume of NS administered is significantly associated with increases in K+ levels at 24 hours.
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