Epic Code LAB107 Osmolality, Blood
Test Name Alias
Osmolality Serum | OSMO | 8286
Interface Order Alias
10213
Collection Instructions
Collection difference between Corewell Health West (CHW) and Corewell Health South (CHS) |
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Specimen Collection: Blood
Container(s):
- CHW: Mint Green Top (Lithium Heparin Gel) or Gold Top (Serum Separator-SST Gel)
- CHS: Gold Top (Serum Separator-SST Gel) or Red Top (Plain, No additive)
Preferred Volume to Collect: Full tube
Minimum Volume to Collect: 2.0 mL
Collection Instructions:
- Mint Green tube: Gently invert 8 – 10 times to mix lithium heparin anticoagulant with blood.
- Gold tube: Gently invert 8 – 10 times to mix clot activator with blood.
- Specimen should be processed within 2 hours, see processing instructions
Processing Instructions (Laboratory, Outpatient or Off-site collection)
- Processed Specimen: Plasma or Serum
- Centrifuge/Spin: Yes
- Aliquot: Yes
- Minimum volume plasma/serum:1.0 mL
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Processing Instructions:
- Plasma: Centrifuge after collection. Do not collect Mint Green
- Serum: Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.
- Transport Temperature: Refrigerated
Specimen Transport Temperature
Refrigerated
Specimen Stability
Ambient: 12 hours
Refrigerate: 72 hours
Frozen: aliquot plasma/serum for longer storage
Laboratory Retention: 72 hours
Test Frequency
Available 24 hours, usual TAT 1 day.
Reference Range
270 – 300 mOsm/kg H2O
Performing Department
Chemistry
Performing Department Laboratory Location
CHW
Corewell Health Reference Laboratory, Grand Rapids, MI
Corewell Health Blodgett Laboratory, Grand Rapids, MI
CHS
Corewell Health Lakeland St. Joseph Laboratory, St. Joseph, MI
Methodology
Freezing Point Depression
CPT
83930
CDM Code
3018393001
Epic Test ID
1230101000
LOINC
Osmolality: 2692-2
Mayo Access Code
SHO8286
Reviewed Date
3/7/2024
Updated Date
5/23/2025 - CHS info added