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Published on: September 10, 2017
Random Assay in Radioimmunoassay: Feasibility and Application Compared with Batch Assay
Jung Min Lee1, Hwan Hee Lee1, Sohyun Park1
1Department of Nuclear Medicine, National Cancer Center, 323 Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769 Republic of Korea ; Department of Nuclear Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
The random assay technique is a viable alternative to traditional batch assays for CA-125 radioimmunoassay (RIA), offering improved flexibility and reduced turnaround times. This method demonstrates strong agreement with existing batch assays, making it suitable for daily practice.
Area of Science:
- Clinical Chemistry
- Immunoassay Technology
- Biomedical Diagnostics
Background:
- Radioimmunoassay (RIA) traditionally uses batch assays, known for robustness but limited by reporting time due to sequential sample processing.
- The need for faster results in clinical diagnostics drives the exploration of alternative immunoassay techniques.
- Limitations in batch assay turnaround time necessitate evaluating more efficient methods for routine diagnostics.
Purpose of the Study:
- To evaluate the feasibility and applicability of the random assay technique in routine CA-125 radioimmunoassay (RIA).
- To compare the performance of random assay versus conventional batch assay for CA-125 immunoradiometric assay (IRMA).
- To determine if random assay can enhance flexibility and reduce reporting time in RIA.
Main Methods:
- Calculated coefficients of variation (CVs) for standard curves within CA-125 IRMA kits.
- Obtained standard curves from multiple kits and lots (prospective and retrospective).
- Collected raw measurement data for control samples and patient sera, then compared batch and random assay results after normalization.
Main Results:
- Inter-kit CVs in the random assay were comparable to intra-kit CVs, indicating consistent performance across different kits and lots.
- Random assay showed similar CVs to batch assay for control samples, with high concordance (Intraclass Correlation Coefficients [ICCs] near 1.00) for patient sera.
- The random assay technique demonstrated robust performance and strong agreement with the established batch assay method.
Conclusions:
- The random assay technique is successfully applicable to conventional CA-125 IRMA kits.
- Random assay offers a viable alternative to batch assay, showing strong agreement and improved efficiency.
- Implementing random assay can increase operational flexibility and significantly decrease turnaround time in RIA procedures.
