Interpretation of Rh Typing Immunohematology Review 451
ANTI-D CONTROL Rh TYPE+ 0 Pos0 0 Neg*+ + Invalid*Test for weak D if donor or infant of mother being evaluated for RhIG.
FALSE POSITIVE FALSE NEGATIVE
Warm or cold autoagglutininsRouleauxPolyagglutinable RBCsNonspecific agglutination due to ingredient in reagent,
e.g., dye, preservativeContaminated or incorrect reagentFailure to add reagentRBC suspension too heavyResuspending cell button too vigorouslyContaminated or incorrect reagentBlocking of ag sites by abs, e.g., severe HDFN due to anti-D