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Updated: Jul 19, 2026
10:57
Fast and Sensitive Colloidal Coomassie G-250 Staining for Proteins in Polyacrylamide Gels
Published on: August 3, 2009
Role of gel based technique for Coomb's test
M Jaiprakash1, P K Gupta, Harsh Kumar
1Department of Transfusion Medicine, Armed Forces Medical College, Pune.
Indian Journal of Pathology & Microbiology
|September 28, 2006
Summary
Gel technology (GT) offers superior sensitivity and specificity for direct (DAT) and indirect antiglobulin tests (IAT) compared to conventional tube tests (CTT). This makes GT a recommended alternative for routine blood transfusion diagnostics.
Area of Science:
- Transfusion Medicine
- Immunology
- Clinical Diagnostics
Background:
- Direct antiglobulin test (DAT) and indirect antiglobulin test (IAT) are crucial for diagnosing immune-mediated disorders.
- Column technology, specifically gel technology (GT), has been introduced in transfusion laboratories.
- Comparison between conventional tube tests (CTT) and GT for Coomb's testing is needed.
Purpose of the Study:
- To compare the performance of gel technology (GT) with conventional tube tests (CTT) for DAT and IAT.
- To evaluate the sensitivity and specificity of GT versus CTT.
Main Methods:
- A total of 1656 samples were analyzed.
- 602 samples were tested for DAT using both CTT and GT.
- 1054 samples were tested for IAT using both CTT and GT.
Main Results:
- DAT: GT showed 97.5% concordance with CTT, detecting higher positivity (8.6% vs 6.1%). GT sensitivity was 100%, specificity 97.3%.
- IAT: GT showed 98.8% concordance with CTT, detecting higher positivity (6.6% vs 5.4%). GT sensitivity was 100%, specificity 97.7%.
Conclusions:
- Gel technology (GT) is a more sensitive and specific method than conventional tube tests (CTT) for both DAT and IAT.
- GT is recommended for routine implementation in blood transfusion centers.
- GT offers improved detection rates for immune-mediated hemolytic anemias.
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