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HelpTest Code LAB3002 Rh Immune Globulin Screen and Microdose
Useful For
Determining if a patient is a candidate for Rhogam and calculating the correct dose of Rhogam needed. Rhogam is administered to Rh-negative mothers who deliver Rh-positive (or unknown Rh) babies as an effective means of preventing Rh-alloimmunization. In most instances, D-negative mothers delivering D-positive infants can be protected from producing anti-D by the administration of Rhogam within 72 hours.
Methodology
Capture solid phase automation and manual blood banking methods
Profile Information
| Test Code | Test Name | Always Performed |
|---|---|---|
| LAB895 | ABO and Rh Type, Blood | Yes |
| LAB278 | Antibody Screen (Indirect Coombs), Blood | Yes |
Performing Laboratory
Bozeman Health Laboratory Services
Specimen Requirements
Specimen Type: EDTA whole blood
Container/Tube: Purple top or pink top (K2 EDTA)
Specimen Volume: 6 mL
Specimen Minimum Volume: 3 mL
Collection Instructions: Collect blood from mother at least 1 hour after delivery of all products of conception and collect as soon as possible thereafter. Do not centrifuge. Forward unprocessed whole blood promptly. Rhogam must be given within 72 hours.
Specimen Rejection:
1. Gel tubes will be rejected.
2. Specimen must be labeled properly.
3. This test is affected by gross hemolysis.
Specimen Transport Temperature
Ambient <24 hours/Refrigerated >24 hours
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood EDTA | Ambient | 24 hours |
| Refrigerated | 48 hours |
Reference Values
Type: A, B, O, AB, A2
Rh: Positive or Negative
Antibody Screen: Negative (reported as positive or negative)
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
86900-ABO
86901-Rh type
86850-Antibody screen