Ordering Recommendation

Use to confirm unstable nature of hemoglobins. Test cannot be used on infants <6 months of age due to physiologically elevated Hb F levels.

Mnemonic
HGB UNSTAB
Methodology

Visual Identification

Performed

Mon-Fri

Reported

1-5 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation

Test results are unreliable in infants younger than 6 months of age.

Collect

Lavender (EDTA) or pink (K2EDTA).

Specimen Preparation

DO NOT FREEZE. Transport 5 mL whole blood. (Min: 2 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Samples more than 7 days old. Specimens collected on infants less than 6 months old.

Remarks
Stability

Ambient: Unacceptable; Refrigerated: 7 days; Frozen: Unacceptable

Reference Interval

Negative

Interpretive Data



No compliance statements are in use for this test.

Note
Hotline History
N/A
Components
Component Test Code* Component Chart Name LOINC
0049020 Hemoglobin, Unstable 4639-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Hb Heat Sensitivity
  • Heat Stability Test
  • Isopropanol Stability Test
  • RBC Heat Stability Test
  • Unstable Hemoglobin
Hemoglobin, Unstable