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Updated: Jun 21, 2026
05:18
A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering
Published on: December 7, 2016
Hemoglobin color scale a diagnostic dilemma.
Hema Anand1, Rashid Mir, Renu Saxena
1Department of Haematology, All India Institute of Medical Sciences, New Delhi, India.
Indian Journal of Pathology & Microbiology
|August 15, 2009
Summary
The Hemoglobin Color Scale (HCS) showed low sensitivity (30%) for anemia screening compared to Sahli's method, despite high specificity (100%). Sahli's method demonstrated better agreement with the gold standard autoanalyzer for hemoglobin estimation.
Area of Science:
- Hematology
- Clinical Diagnostics
Background:
- Anemia screening is crucial for public health.
- Laboratory-based hemoglobinometry is not always accessible.
- Hemoglobin Color Scale (HCS) offers a field-based screening alternative.
Purpose of the Study:
- To compare the efficacy of Hemoglobin Color Scale (HCS) against Sahli's method (SM) for hemoglobin estimation.
- To evaluate the sensitivity and specificity of HCS and SM using an autoanalyzer as the gold standard.
Main Methods:
- A comparative study involving 401 patients was conducted.
- Hemoglobin levels were measured using HCS, Sahli's method, and an autoanalyzer.
- Sensitivity and specificity were calculated for HCS and SM relative to the autoanalyzer.
Main Results:
- Sahli's method exhibited 98.2% sensitivity and 66.2% specificity.
- Hemoglobin Color Scale (HCS) demonstrated 30% sensitivity and 100% specificity.
- Sahli's method showed good agreement with the autoanalyzer results.
Conclusions:
- Hemoglobin Color Scale (HCS) is less efficacious for field-based hemoglobin estimation compared to Sahli's method.
- Sahli's method provides a more reliable screening tool for anemia in resource-limited settings.
- Further validation of HCS may be needed for accurate anemia detection.
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