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Am Fam Physician. 2015;92(6):430b-437

Incorrect algorithms. The article “Diagnosis and Management of Sodium Disorders: Hyponatremia and Hypernatremia” (March 1, 2015, p. 299) contained errors in Figure 1 (p. 301) and Figure 2 (p. 304). In Figure 1, the urinary sodium values for hypervolemic hyponatremia were transposed. The algorithm should have showed that urinary sodium < 20 mEq per L may indicate heart failure, cirrhosis, nephrosis, and hypoalbuminemia, whereas urinary sodium > 20 mEq per L may indicate renal failure. Figure 2 should have indicated that desmopressin 1 to 2 mcg every four to six hours should be considered only after the infusion of 3% saline (1 to 2 mL per kg per hour). The corrected figures are printed above and on p. 432, and the online version of the article has been corrected.

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