Laboratory Services
Type and Screen, Prenatal
Print this pageUpdated Test Information:
| Test Description |
Type and Screen, Prenatal
|
|
|---|---|---|
| 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) of prenatal/postpartum patients. ABS detects antibodies directed against non-ABO red blood cell antigens during pregnancy. The Blood group, Rh type, and Antibody Screen of expectant mothers may indicate potential for hemolytic disease of the fetus/newborn. Rh typing is also used to determine Rh immune globulin candidacy for prenatal and postpartum patients. For blood grouping, Rh typing and antibody screening for any other patient population, please reach out directly to a local blood bank. |
|
| Specimen Type |
Whole Blood |
|
| Specimen Requirements |
2 Lavender |
|
| Alternate Specimen Type |
None |
|
| 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 |
|
| Stability |
Refrigerated 10 days |
|
| Unacceptable Specimen Conditions |
Grossly hemolyzed, icteric, or lipemic samples. Frozen samples. Bacterial contamination. Samples from patients other than prenatal. |
|
| Limitations |
Variable testing results may be observed with partial antigens, which are rare variants of the D antigen. Very weak expressions of the D antigen may not be detected. |
|
| Methodology |
Hemagglutination/gel filtration |
|
| Estimated TAT |
1-3 days |
|
| Testing Schedule |
Monday - Friday |
|
| Test Includes |
ABORH, ABS |
|
| CPT Code(s) |
86900 |
|
| 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 |
