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HelpTest Code PREX Exchange Transfusion, Neonatal
Specimen Required
| Patient Preparation: |
|
| Container Type: |
Optimal: Pink Top (EDTA)--mother Lavender microtainer (EDTA)--infant
Acceptable: Lavender mother |
| Optimal Collection Volume: |
Whole Blood Mother 6mL Infant 1.5mL |
| Collection Instructions: |
Collect specimen and gently invert several times to mix. Label the specimen, in the presence of the patient, with full name, date of birth and patient medical record number. |
| Processing Instructions: |
1. Collect sample in pink top or lavender container. 2. Label per policy in the presence of the patient. 3. Send whole blood sample to Blood Bank for testing. |
Useful For
The treatment of excessively high levels of unconjugated bilirubin (hyperbilirubinemia) and the prevention of irreversible damage due to kernicterus.
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| MIW | Mother Infant Workup | Yes | Yes |
Method Name
Fresh, washed red cells are combined with fresh frozen plasma
to
yield a 45% to 55% hematocrit unit of requested volume.
Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Refrigerated | 3 days | |
| Ambient | 1 day |
Rejection Due To
| Hemolysis | Mild OK; Moderate OK; Gross Reject |
| Lipemia | Mild OK; Moderate OK; Gross Reject |
| Icterus | Mild OK; Moderate OK; Gross Reject |
| Other | N/A |
Specimen Minimum Volume
Collecting minimum volumes can result in a need for sample recollection, and/or a delay in results. Minimum volumes are subjective and cannot account for all aspects of specimen and testing needs. Refer to the Specimen Required section for optimal volumes for laboratory specimens. Contact the Bronson Laboratory if complex collection exceptions occur that require more information.
| Minimum Volume: | 1.0 mL whole blood |
| Neonate Volume: | 0.5 mL whole blood |
Performing Laboratory
Bronson Laboratory, Blood Bank-Kalamazoo
Day(s) Performed
24/7
Specimen Retention Time
Blood Bank specimens (other than Cord Blood) are retained in the Blood Bank for 30 days. Pretransfusion testing should be completed on specimens within 2 days of collection.