This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.
Sodium correction rate
Actual change in sodium from two measurements – compared with the guideline limits
Scientific basis
Children
The formulas come mainly from studies in adults and are applied unchanged in children; where total body water is involved (water and sodium deficit), the age-appropriate body water fraction is used. According to the European guideline, the sodium correction limits (10 mmol/l per 24 h) also apply to children.
Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.
Frequently asked questions
Sodium correction rate: What does this calculator compute?
Calculates the correction rate in mmol/l per hour and per 24 hours from two sodium values and the time interval and compares it with the upper limits for hyponatraemia (10 mmol/l in 24 h, 8 on following days; Spasovski 2014) and hypernatraemia (0.5 mmol/l/h, 10 mmol/l/day; Adrogué & Madias 2000) and with the paediatric limits of the Royal Children's Hospital Melbourne (hyponatraemia ≤ 8 mmol/l per 24 h, hypernatraemia ≤ 0.5 mmol/l/h).
Sodium correction rate: Which sources is this calculator based on?
Adrogué HJ, Madias NE: Hypernatremia (N Engl J Med 342:1493–1499) (2000); Spasovski G, Vanholder R, Allolio B, et al. – Hyponatraemia Guideline Development Group (ESE/ESICM/ERA-EDTA): Clinical practice guideline on diagnosis and treatment of hyponatraemia (Eur J Endocrinol 170:G1–G47) (2014); The Royal Children's Hospital Melbourne: Clinical Practice Guideline: Hyponatraemia (2023); The Royal Children's Hospital Melbourne: Clinical Practice Guideline: Hypernatraemia (2020)