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Endocrinology Emergency Medicine General Medicine Standard clinical practice

Corrected Sodium (Hyperglycaemia)

Corrects serum sodium for the dilutional effect of hyperglycaemia to reveal true sodium status.

Used in: Diabetes & DKA Hyponatraemia

Score interpretation

Hyponatraemia 0–134

Corrected Na⁺ < 135 mmol/L: True hyponatraemia even accounting for hyperglycaemia.

→ Address both hyperglycaemia and hyponatraemia. Cautious sodium correction. Endocrinology or nephrology review.

Normal 135–145

Corrected Na⁺ 135–145 mmol/L: Normal sodium once hyperglycaemia is corrected.

→ The apparent hyponatraemia on labs is due to hyperglycaemia (dilutional). Treat hyperglycaemia — sodium will normalise.

Hypernatraemia ≥ 146

Corrected Na⁺ > 145 mmol/L: True hypernatraemia. Volume depletion.

→ Patient is significantly dehydrated. Aggressive fluid replacement required. HHS (hyperosmolar hyperglycaemic state) should be considered.

Interpretation bands for the Corrected Na⁺. Apply clinical judgement and local guidance.

References

Related

Curated clinical cross-links plus same-class fallbacks.

📚 MRCEM Revision

Featured in these MRCEM clinical pathways

The Corrected Na⁺ is covered in detail — with RCEM/NICE evidence base, indications and pitfalls — in the following exam-focused pathways on our sister siteReviseMRCEM.

MRCEM Primary / Intermediate / OSCE candidates: each pathway includes exam-style questions, RCEM/NICE citations, and FAQ summaries.

Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.