Sodium tests (numerical value)

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Codelist metadata

Coding system

SNOMED CT

Coding system release

39.2.0

Organisation

OpenSAFELY

Codelist ID

opensafely/sodium-tests-numerical-value

Version ID

1f50a646

Versions

  1. 1f50a646 Created: 24 Feb 2025 at 15:59
  2. 32bff605 Created: 20 Apr 2021 at 09:43

About

Description

A SNOMED CT codelist for patients receiving monitoring of sodium levels, with a numerical value.

Methodology

We identified the full set of sodium level codes (see sodium tests codelist), and excluded any codes which did not have at least 10 thousand codes in EMIS and SystmOne recorded in 2020, where a reasonable proportion had numerical values attached.

Original signoff [32bff605] by Richard Croker and Brian Mackenna (April 2021) Updated version [1f50a646] by Richard Croker and Andrew Brown (Feb 2025)

Signed off by

  • Richard Croker, (Feb. 24, 2025)
  • Brian MacKenna, (April 21, 2021)

Codelists are developed by a broad community of users for individual study purposes, which may or may not meet the needs of other studies. They should not be thought of as universal definitions of a particular condition.

We don't offer any guarantees about what they do or don't identify. Users should carefully check that any codelist meets their needs, and seek clinical input where appropriate.

code term
1000661000000107 Serum sodium level
1012681000000101 Blood sodium level
1017381000000106 Plasma sodium level

Codes not in the full codelist are in faint grey.

This page shows the search terms that were used to build the codelist. Concepts that match the search terms, but which were excluded, are in faint grey.

sodium level

Included 3 out of 62 matching concepts.

Show matching concepts
  • 24 hour urine sodium output (1019851000000101)
  • 24 hour urine sodium output measurement (313691004)
  • Acute hyponatremia (4575002)
  • Blood sodium level (144344001)
  • Blood sodium level (167105002)
  • Blood sodium level (1012681000000101)
  • Blood sodium measurement (312469006)
  • CSF sodium level (115991000000109)
  • CSF sodium level (120571000000101)
  • Cerebral hyponatremia (84937002)
  • Cerebrospinal fluid sodium level (1016161000000102)
  • Cerebrospinal fluid sodium measurement (412885005)
  • Chronic hyponatremia (50327002)
  • Dialysis fluid sodium level (121031000000104)
  • Dialysis fluid sodium level (116451000000100)
  • Dialysis fluid sodium level (991611000000107)
  • Dialysis fluid sodium measurement (413023009)
  • Dilutional hyponatremia (307201006)
  • Drug-induced hyponatremia (237844003)
  • Finding of sodium level (365761000)
  • Fluid sample sodium (993611000000106)
  • Fluid sample sodium measurement (269919009)
  • Fractional excretion of sodium (1005601000000102)
  • Hyponatremia (89627008)
  • Hyponatremia with decreased serum osmolality (237842004)
  • Hyponatremia with excess extracellular fluid volume (42669007)
  • Hyponatremia with extracellular fluid depletion (74185008)
  • Hyponatremia with normal extracellular fluid volume (74003001)
  • Paraneoplastic hyponatremia (405566004)
  • Plasma sodium level (1017381000000106)
  • Plasma sodium level (389632006)
  • Plasma sodium level (390364001)
  • Plasma sodium measurement (390958001)
  • Pseudohyponatremia (237843009)
  • Serum sodium above reference range (1153565002)
  • Serum sodium below reference range (1153567005)
  • Serum sodium level (1000661000000107)
  • Serum sodium level outside reference range (166693005)
  • Serum sodium level within reference range (166692000)
  • Sodium level (168901000000107)
  • Sodium level (173491000000105)
  • Sodium level (1020681000000107)
  • Sodium level setting on haemodialysis machine (517561000000106)
  • Sodium measurement, serum (104934005)
  • Sodium measurement, urine (104935006)
  • Substance concentration of sodium in 24 hour urine (4491000237108)
  • Substance concentration of sodium in blood (54381000237109)
  • Substance concentration of sodium in cerebrospinal fluid (16851000237108)
  • Substance concentration of sodium in fluid (15411000237103)
  • Substance concentration of sodium in haemodialysis fluid (14091000237101)
  • Substance concentration of sodium in plasma (1107861000000100)
  • Substance concentration of sodium in serum (1107871000000107)
  • Substance concentration of sodium in sweat (461000237100)
  • Substance concentration of sodium in urine (1107881000000109)
  • Substance concentration of sodium in vitreous fluid (2242781000000108)
  • Sweat sodium level (1009091000000102)
  • Sweat sodium measurement (271279007)
  • Transitory neonatal hyponatremia (206490007)
  • Transurethral resection of prostate syndrome (303087003)
  • Urine sodium above reference range (108301000119103)
  • Urine sodium level (1003241000000100)
  • Water intoxication syndrome (71785001)

code: 1000661000000107

Included 1 out of 2 matching concepts.

Show matching concepts
  • Serum sodium level (1000661000000107)
  • Substance concentration of sodium in serum (1107871000000107)

code: 1017381000000106

Included 1 out of 2 matching concepts.

Show matching concepts
  • Plasma sodium level (1017381000000106)
  • Substance concentration of sodium in plasma (1107861000000100)