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Potential reasons for invalid NAT assay results
| Error type | Example |
|---|---|
| Sample inhibitory substances | Cadaveric blood specimens, when tested neat, may be invalid due to inhibitory substances within the specimen |
| Chemistry error | Internal Control Signal lower than the Internal Control cutoff |
| Assay processing error | Clot detected in sample |
| Reagent dispensing error | |
| Results processing error | RLU value outside of software range |
| Invalid calibrator |
