Red Blood Cell Proportion by Autoanalyzer (Qualitative)
This test evaluates the relative distribution of red blood cells (RBCs) in a blood sample, often used to assess conditions affecting RBC count or morphology.
["This qualitative test helps identify if RBC proportions are abnormal, which may signal underlying blood disorders or conditions."]
Key facts at a glance
- LOINC
- 57843-5
- Short code
- RBC # Prt Auto
- Synonyms
- RBC # Prt Auto
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 4.2
- Ref high
- 5.9
- Critical range
- 2 N/A – 7 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- automated-count
- CPT
- 85041
- SNOMED
- 900000000000003001
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test analyzes the proportion of red blood cells in whole blood, typically using automated methods to categorize RBC populations. It may not provide exact counts but helps determine if RBC distribution is consistent with normal or pathological patterns.
Common Uses
This test may be used in cases where abnormal RBC morphology (e.g., spherocytosis, elliptocytosis) or suspected polycythemia/anemia is suspected. It can also support diagnostic workup for conditions affecting blood cell composition.
How the Test Works
The sample is processed through an automated analyzer that separates and evaluates RBC populations. Qualitative results indicate whether RBC proportions are within expected ranges or deviate significantly.
What Abnormal Results Might Mean
Abnormal RBC proportions could indicate conditions such as inherited blood disorders (e.g., hereditary spherocytosis), acquired hemolytic anemia, or other hematologic abnormalities. Your healthcare provider will interpret results in context with your symptoms and lab findings.
Reference range
Adult males: 4.2-5.9; Females: 3.8-5.1 x 10^12/LN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
RBC Proportion (Qualitative)
Frequently asked questions
Why might my doctor order this test?
What does a positive or abnormal result mean?
How often should I expect this test?
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 17, 2026. · Read our editorial policy