Hemoglobin S
- Sample Type
- Standard
- Fasting
- No
- Unit
- %
Hemoglobin S (HbS) is an abnormal variant of hemoglobin caused by a specific mutation in the beta-globin gene. This component is the hallmark of Sickle Cell Disease. On an electrophoresis panel, its presence confirms either Sickle Cell Trait (HbAS) or Sickle Cell Disease (HbSS). HbS causes red blood cells to take on a rigid, sickle shape under deoxygenated conditions, leading to microvascular occlusion, hemolytic anemia, and multi-organ damage.
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Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Recent blood transfusions (within 3-4 months) can mask the presence of HbS or lead to inaccurate percentages because the donor's normal HbA will predominate. A 'Sickle Prep' or 'Solubility Test' is a screen, but electrophoresis or HPLC is required for definitive quantification.
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 Hemoglobin S:
Official Sources
- Sickle cell anaemia therapy in 2025 - PMCpmc.ncbi.nlm.nih.gov
Research & Guidelines
- PubMed: Hemoglobin S Clinical GuidelinesNCBI / PubMed
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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