Other Hemoglobin Variants
- Sample Type
- Standard
- Fasting
- No
- Unit
- %
This component identifies and quantifies non-standard hemoglobins during High-Performance Liquid Chromatography (HPLC). Normal adult hemoglobin is primarily HbA (>95%), HbA2 (<3.5%), and trace HbF. 'Other' variants include HbS (Sickle Cell), HbC, HbE, or HbD. Detecting these is vital for diagnosing hemoglobinopathies and thalassemias, which affect red blood cell stability, oxygen-carrying capacity, and lifespan.
Why Context Matters
Recent blood transfusions (within the last 3-4 months) can introduce donor HbA and dilute the patient's actual variant percentage, leading to false negatives. Severe iron deficiency can also suppress the levels of certain variants like HbA2, potentially masking a co-existing beta-thalassemia trait.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Other Hemoglobin Variants:
Official Sources
- Hemoglobinopathy Evaluation - Testing.comTesting.com
- Hemoglobin Test: MedlinePlus Medical TestMedlinePlus
Research & Guidelines
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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