Scheme Information Sheets
UK NEQAS for Urine Chemistries
| Scheme Particulars | Indicative Details |
|---|---|
| Accreditation body | UKAS |
| ISO/IEC Accreditation status | ISO/IEC 17043:2023 |
| UKAS Accredited Proficiency Testing Provider No | 7860 |
| Objective of Scheme | Provides EQA coverage and analytical assessment for routine clinical chemistry analytes in urine. This Scheme is linked quarterly to the KFRE element of the UK NEQAS for Acute and Chronic Kidney Disease |
| Pre-, Analytical, Post- status | Analytical |
| Number of distributions per year (nominal) | 11 |
| Specimens per distribution | 3 |
| Number of Specimens per annum | 33 |
| Frequency of distribution | Monthly |
| Scoring system | ABC |
| Material distributed | Pooled, liquid human urine with or without exogenous added analyte |
| Programme Director(s) / Organiser(s) | Rachel Marrington |
| Criteria for participation | All, but overseas by courier |
| Nominal sample volume (mL) | 1.0 |
| Sample presentation TACs | All analytes in the same tube |
| Data in Chemistry on-line Dashboard | Yes |
| Analyte | Approx Range | Default Units | Target Value | B Score Limit (%) | C Score Limit (%) |
|---|---|---|---|---|---|
| ACR | 0 – 300 | mg/mmol | ALTM | 20.0 | 25.0 |
| Non-dipstick pH | 4 – 9 | pH | MED | 10.0 | 15.0 |
| PCR | 0 – 500 | mg/mmol | ALTM | 20.0 | 25.0 |
| Urinary (Total) Protein | 0 – 8 | g/L | ALTM | 25.0 | 30.0 |
| Urinary Albumin | 0 – 4000 | mg/L | ALTM | 20.0 | 25.0 |
| Urinary Amylase | 0 – 3000 | U/L | GLTM | 15.0 | 15.0 |
| Urinary Calcium | 0 – 5 | mmol/L | ALTM | 10.0 | 15.0 |
| Urinary Chloride | 10 – 200 | mmol/L | ALTM | 7.5 | 10.0 |
| Urinary Creatinine | 1 – 30 | mmol/L | ALTM | 7.5 | 10.0 |
| Urinary Glucose | 0 – 32 | mmol/L | ALTM | 15.0 | 20.0 |
| Urinary Magnesium | 0 – 5 | mmol/L | ALTM | 20.0 | 20.0 |
| Urinary Osmolality | 50 – 1000 | mmol/kg | ALTM | 5.0 | 5.0 |
| Urinary Phosphate | 0 – 30 | mmol/L | ALTM | 10.0 | 10.0 |
| Urinary Potassium | 5 – 120 | mmol/L | ALTM | 5.0 | 7.5 |
| Urinary Sodium | 10 – 160 | mmol/L | ALTM | 5.0 | 7.5 |
| Urinary Urate | 0 – 5 | mmol/L | ALTM | 15.0 | 20.0 |
| Urinary Urea | 30 – 800 | mmol/L | ALTM | 7.5 | 10.0 |
| Abbreviation | Expansion |
|---|---|
| ALTM | All Laboratory Trimmed Mean |
| GLTM | Group Laboratory Trimmed Mean – which is the Method Principle Mean |
| MLTM | Method Laboratory Trimmed Mean – usually a manufacturer system / analyser mean |
| XALTM | An external value that may be from a Reference Method System |
| OGLTM | A Method Principle Mean used as the target for all laboratories |
| OMLTM | A specific Method Mean used as a target for all laboratories |
| MED | Median |
