If Rh (BigD) is negative, may reflex to Weak D (Du) test

• Detection of the D (RH1) antigen on red blood cells.
• May be used in the determination of the mother's candidacy for Rh immune globulin therapy.
  
  

• Testing should be performed within 7 days of collection
• Very weak expressions of the Rh D antigen may not be detected using traditional serologic methodologies

Lavender (EDTA), 4mL

Immediately after collection, mix tube thoroughly by gentle inversion, 8 - 10 times, to prevent clotting

Labelling instructions:

Excellian sites:
Tube must be labeled with the patients first and last name and Excellian MRN, date and time of collection and phlebotomist’s A#

Non-Excellian sites:
Tube must be labeled with the patient's first and last name and date of birth, date and time of collection and phlebotomist’s initials.

Lavender (EDTA), 4mL

Refrigerated - 7 days

• Improper label (unlabeled or mislabeled)
• Hemolysis

Agglutination

Column-agglutination

A positive test indicates the presence of the D antigen.

The Rh blood group system is the second most important blood group system, after the ABO blood group system