Alkali Denaturation Test (APT and Downey)
Test code
CPT code(s)*
Test resources
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Details
Methodology
Colormetric (C)
Assay category
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Alternative name(s)
APT Test
Specimen requirements | |
|---|---|
| Patient preparation | None Specified |
| Preferred specimen(s) | 2 mL of a random, bloody stool submitted in a plastic leak-proof container |
| Alternative specimen(s) | 2 mL bloody vomitus or bloody mucus, submitted in a plastic leak-proof container or bloody diaper submitted in a plastic leak-proof container |
| Minimum volume | 1 mL |
| Collection instructions | Note: The specimen requirement for this test is a grossly bloody (red) non-tarry stool (or bloody vomitus, bloody mucus or blood-stained diaper from newborn within 1 day of birth). If the specimen submitted was not bloody and we were unable to elute any red color from it, the test cannot be performed and will be cancelled |
| Transport container | Plastic leak-proof container |
| Transport temperature | Room temperature |
| Specimen stability | Room temperature: 7 days Refrigerated: 7 days Frozen: Unacceptable |
| Reject criteria | Received frozen |
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
*The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.
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