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Vanderbilt Pathology Laboratory Services

Test Directory



ANTI-HETEROLOGOUS PROTEIN (AHP)

Department: Reference
Test Synonym(s): AHP
CPT Codes: 83516
Methodology: Indirect, non-competitive ELISA (enzyme-linked immunosorbent assay)
Reference Range: Reportable ranges: IgM - 1:50 to 1:6400; IgG - 1:100 to 1:12,800
Tube Type: Red Top Tube spun down with serum removed
Specimen: Serum
Volume: 1 mL serum
Temperature: Freeze the serum at -20 degrees Celsius (Refrigeration at 2-8 degrees Celsius is acceptable but prefer frozen.)
Days Performed: Friday
Times Performed: Once a week
TAT: Test is usually performed once a week on Fridays. Give advance notice for ASAP specimens.
Significance: Neg IgM - <1:50; Neg IgG - <1:100; Low Positive - 1:100 to 1:400; Mid Positive - 1:800 to 1:1600; High Positive - >1:1600; Alert Values (notify client ASAP)>1:800
Special Instructions: SHIPPING: Ship sample overnight on dry ice in compliance with DOT regulations for diagnostic samples. If dry ice is not available, ship the serum frozen with frozen cold packs.


REQUISITION: Each sample must be accompanied by a requisition containing the patient's name, age, DOB, unique ID # and Physician's name, the requesting facility, collection date. Please include a contact phone number and a fax number.


RESULTS: Reports will be mailed to the facility. If reports need to be faxed, please notify the lab. Contact the lab with any questions: 615-255-5227.

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