Clinical Utilities

CPT Codes
87449

Reference Range
  EIA UNITS   (RESULT INTERPRETATION)
     -----------------------------------
     Equivocal:  Result inconclusive after repeated testing
     <1.0:        Negative
     1.0 - 2.0:  Weak positive;suggest repeat
     2.1 - 4.0:  Positive; repeat if inconsistent with
                      clinical findings
     4.1 - 10.0  Moderate Positive
     >10.0:      High positive
                

     FOLLOW-UP TESTING ONLY (comparing to previous
                                                                    specimen tested in the
                                                                     same assay):                   
----------------------------------------------------------------

     Increase:
            < or = 2.0:    Stable*
             2.1 - 4.0:    Mild increase; possible failure;
                                suggest repeat
             >4.0:          Moderate to Marked increase; probable
                                failure
                          

     Decrease: Current specimen having >2.0 unit
                           decrease compared to result of prior
                           specimen tested in the same assay is
                           interpreted as having a decreased
                           antigen level.
                          

     *No Change: Increases or decreases < 2.0 units are
                               considered no change.

Component Information