Tests:Urate, Plasma: Difference between revisions
Tests:Urate, Plasma
Created page with "{{DISPLAYTITLE: Urate, Plasma}} Full Test List Biochemistry Tests {| class="wikitable" ! colspan="2" | === ''Overview'' === |- |Department |Biochemistry |- |Test Code |PURT |- |Synonyms |Uric acid |- |Turnaround Time |2 hrs |- |Stability – Add test | |- ! colspan="2" | === ''Specimen Requirements'' === |- |Specimen Type |Plasma Serum |- |Specimen Transportation | |- |Preferred |6 mL Plain <span style="background:#e30022"> Red-Top</span> |-..." |
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{| class="wikitable" | {| class="wikitable" | ||
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== | == Overview == | ||
|- | |- | ||
|Department | |Department | ||
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|Synonyms | |Synonyms | ||
|Uric acid | |Uric acid | ||
|- | |||
|Test Availability | |||
|Monday - Sunday, testing routinely available out of hours | |||
|- | |- | ||
|Turnaround Time | |Turnaround Time | ||
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|- | |- | ||
! colspan="2" | | ! colspan="2" | | ||
== | == Specimen Requirements == | ||
|- | |- | ||
|Specimen Type | |Specimen Type | ||
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Serum | Serum | ||
|- | |- | ||
|Preferred | |Preferred | ||
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|Acceptable | |Acceptable | ||
|4 mL Li-Hep <span style="background:#3cb371"> Green-Top </span> | |4 mL Li-Hep <span style="background:#3cb371"> Green-Top </span> | ||
|- | |||
|Unacceptable | |||
| | |||
|- | |||
|Specimen Transportation | |||
| | |||
|- | |- | ||
|Paediatric Requirements | |Paediatric Requirements | ||
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|- | |- | ||
! colspan="2" | | ! colspan="2" | | ||
== | == Aliquot Requirements == | ||
|- | |- | ||
|Sample Type | |Sample Type | ||
| | |||
|- | |||
|preferred Volume | |||
| | | | ||
|- | |- | ||
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! colspan="2" | | ! colspan="2" | | ||
== | == Clinical Information == | ||
|- | |- | ||
|Reference Intervals | |Reference Intervals | ||
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! colspan="2" | | ! colspan="2" | | ||
== | == Comments == | ||
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| colspan="2" |Changes with the reference range may be significant in pregnancy. | | colspan="2" |Changes with the reference range may be significant in pregnancy. | ||
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The risk of developing gout is three times greater if the plasma urate levels are consistently above 0.42 mmol/L. | The risk of developing gout is three times greater if the plasma urate levels are consistently above 0.42 mmol/L. | ||
Plasma urate levels often fall during an acute attack so a normal plasma urate does NOT exclude the diagnosis of gout at this time. | Plasma urate levels often fall during an acute attack, so a normal plasma urate does NOT exclude the diagnosis of gout at this time. | ||
A raised plasma urate level is not sufficient to make the diagnosis of gout, which requires: | A raised plasma urate level is not sufficient to make the diagnosis of gout, which requires: | ||
Revision as of 11:18, 18 March 2025
Overview | |
|---|---|
| Department | Biochemistry |
| Test Code | PURT |
| Synonyms | Uric acid |
| Test Availability | Monday - Sunday, testing routinely available out of hours |
| Turnaround Time | 2 hrs |
| Stability – Add test | |
Specimen Requirements | |
| Specimen Type | Plasma
Serum |
| Preferred | 6 mL Plain Red-Top |
| Acceptable | 4 mL Li-Hep Green-Top |
| Unacceptable | |
| Specimen Transportation | |
| Paediatric Requirements | 600 µL Li-Hep Microtainer |
Aliquot Requirements | |
| Sample Type | |
| preferred Volume | |
| Minimum Volume | |
| Aliquot Transportation | |
Clinical Information | |
| Reference Intervals | 0 – 11 years 0.08 - 0.34 mmol/L
Male 0.20 - 0.42 mmol/L Female 0.15 - 0.36 mmol/L |
| Test Method | Ci8200 analyser, Abbott, Enzymatic. |
| Advanced Notice | |
| Patient Preparation | |
Comments | |
| Changes with the reference range may be significant in pregnancy.
The risk of gout (and probability of diagnosis) is low if the plasma urate levels are repeatedly below 0.42 mmol/L. The risk of developing gout is three times greater if the plasma urate levels are consistently above 0.42 mmol/L. Plasma urate levels often fall during an acute attack, so a normal plasma urate does NOT exclude the diagnosis of gout at this time. A raised plasma urate level is not sufficient to make the diagnosis of gout, which requires: 1. Classical history of podagra; 2. Identification of urate crystals in joint fluid; or (in late cases), typical x-ray changes | |