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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. Ship to the attention of: TRANSPLANT DRUG MONITORING.

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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