Chemistry Specimen Processing: Difference between revisions
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!Collection Notes | !Collection Notes | ||
!Reference Interval | !Reference Interval | ||
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| rowspan="2" |Glucose | |||
|Fasting | |||
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|4.1 - 5.6 mmol/L | |||
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|Random | |||
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| rowspan="2" |Creatinine | | rowspan="2" |Creatinine | ||
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|Blood serum | |Blood serum | ||
|Lithium heparin | |Lithium heparin | ||
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|Fresh samples <2h old | |Fresh samples <2h old | ||
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Revision as of 12:47, 30 January 2025
Separate serum/plasma from blood cells within 2 hours
- For serum, need to wait for specimen to clot first (20-30 min)
Store samples at 4C when not being run
For longer-term storage, store at minimum -20C
| Analyte | Specimen Type | Collection Media | Collection Notes | Reference Interval |
|---|---|---|---|---|
| Glucose | Fasting | 4.1 - 5.6 mmol/L | ||
| Random | ||||
| Creatinine | Urine, 24 hour | |||
| Blood serum | Lithium heparin | |||
| Urea | Blood serum or plasma | Lithium heparin | 2.1 - 7.1 mmol/L | |
| Urine, random | Use thymol preservative and refrigerate | |||
| Urine, 24 hour | Use thymol preservative and refrigerate | 430 - 710 mmol/day | ||
| Uric Acid | Blood serum or plasma | Lithium heparin | ||
| Urine, 24 hour | ||||
| Urinalysis | Urine, first morning midstream clean-catch preferred | Fresh samples <2h old | ||
Special Samples:
- Keep on ice
- Blood gases
- Ammonia
- Protect from light
- Bilirubin
- Vitamin B12