Hemoglobin Unstable Red Blood Cell Fraction Quantification (by Lipid Profile Screening)
This test measures the proportion of red blood cells that may break down improperly due to abnormal lipid content, which can affect blood health.
["Abnormal lipid-related RBC instability may signal underlying metabolic or genetic conditions requiring further evaluation."]
Key facts at a glance
- LOINC
- 41619-8
- Short code
- Hgb Unstab RBC Ql IPS
- Synonyms
- Hgb Unstab RBC Ql IPS
- Category
- hematology
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 7
- Ref high
- 20
- Critical range
- 7 N/A – 20 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- isopropanol-stability
- CPT
- 84520
- SNOMED
- 2739004
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test assesses a subset of red blood cells (RBCs) that may contain unstable lipids, which can contribute to premature RBC destruction. This is often evaluated as part of broader lipid screening to identify potential risks for hemolytic anemia or other blood disorders.
Why It Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like fatigue, pale skin, or if you have a family history of conditions linked to RBC instability (e.g., certain lipid disorders). It may also be used in research or specialized clinical settings to monitor lipid-related RBC health.
How the Test Works
Blood is drawn and analyzed to separate RBCs based on their lipid stability. Advanced techniques (such as high-performance liquid chromatography or immunoassay) detect unstable RBC fractions that may be linked to abnormal lipid profiles.
What the Results Mean
Results indicate the percentage of RBCs with unstable lipid content. Elevated levels may suggest conditions affecting RBC integrity, while normal results indicate stable RBC lipid profiles.
Reference range
Adult: 7-20 mg/dLN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
How common is this test?
What are the typical symptoms if results are abnormal?
Does this test require fasting?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy