Laboratory Services

  1. Laboratory Services
  2. Test Directory

Type and Screen

Print this page

Updated Test Information:

Test Description
Type and Screen
Synonym(s)

Blood Group, Blood Type, Antibody Screen
Test ID
TAS
General Information

ABO/Rh determines the blood group (ABO) and Rh type (pos or neg). ABS detects antibodies directed against red blood cell antigens. The Blood group, Rh type, and Antibody Screen of expectant mothers may indicate potential for hemolytic disease of the fetus/newborn. Rh typing is used to determine Rh immune globulin candidacy for prenatal and postpartum patients.
Specimen Type

Whole Blood
Alternate Specimen Type

None
Specimen Requirements

2 Lavender or 1 Pink (EDTA)
Specimen Collection / Processing Instructions

Lavender - The specimen should be tested as soon as possible after collection. If testing is delayed, EDTA specimens should be stored at 2 to 8°C. Draw an extra lavender tube in case of Antibody ID reflex
Minimum Sample Volume

6 ml
Pediatric Min. Volume (if applicable)

6 ml
Stability

Refrigerated 10 days
Unacceptable Specimen Conditions

Grossly hemolyzed, icteric, or lipemic samples. Frozen samples. Bacterial contamination.
Limitations

Individuals younger than four months may not have developed sufficient antibody to allow for detection in reverse typing test.
Variable testing results may be observed with partial antigens, which are rare variants of the D antigen.
Abnormal plasma proteins, cold autoagglutinins, positive direct antiglobulin test, and, in some cases, bacteremia may interfere with test interpretation.
Methodology

Hemagglutination/gel filtration
Estimated TAT

1-3 days
Testing Schedule

Monday - Saturday
Test Includes

ABORH, ABS
CPT Code(s)

86900
86901
86850
Reflex Conditions

If antibody screen is positive, antibody identification and titer will be performed. Please allow additional time for testing to be completed.
Performing Lab

Incyte Diagnostics
LOINC Code(s)

34532-2