Hemoglobin inferred from donor blood type/donor red blood cell phenotype (qualitative screening)
This test uses blood drawn from a donor to estimate hemoglobin levels indirectly by analyzing red blood cell traits. It helps ensure compatible blood products are matched for transfusions.
["This screening helps match blood types safely for transfusions by assessing red blood cell characteristics."]
Key facts at a glance
- LOINC
- 92540-4
- Short code
- Hemoglobin S inferred Bld/T Donr Ql
- Synonyms
- Hemoglobin S inferred Bld/T Donr Ql
- Category
- hematology
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 12
- Ref high
- 17.5
- Critical range
- 7 N/A – 20 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- molgen
- CPT
- 85018
- SNOMED
- 900000000000003004
- 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 analyzes red blood cell traits (phenotype) from donor blood to infer hemoglobin concentration. While not a direct measurement, this approach supports blood compatibility in transfusion settings.
Why It Matters in Transfusions
Accurate hemoglobin estimation via red blood cell traits ensures safer blood transfusions by preventing mismatches that could cause reactions.
How the Test Works
Blood is collected from a donor, and specific red blood cell markers are evaluated to estimate hemoglobin indirectly. This method relies on genetic and phenotypic markers rather than direct measurement.
When You Might Need This Test
This test is typically performed during blood donation screening or pre-transfusion testing to verify donor blood compatibility for patients with specific hemoglobin-related conditions.
Reference range
Adult males: 13.5-17.5 g/dL; Females: 12.0-16.0 g/dLN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
While not a diagnostic test for hemoglobin disorders, it plays a critical role in transfusion safety by confirming donor blood suitability for patients with known hemoglobin traits (e.g., sickle cell disease, thalassemia).
Short name
Hemoglobin typing (donor blood)
Frequently asked questions
What does this test measure exactly?
Why is this test used for donors?
Can this test replace a standard hemoglobin blood 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 16, 2026. · Read our editorial policy