RhE/e (RHCE) Antigen Genotyping

3002003
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Example Reports
Positive Fetal
Positive Whole Blood

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Informed Consent for Genetic Testing (required for NY patients)

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Additional Technical Information

Ordering Recommendation

Assess risk for alloimmune hemolytic disease of the fetus and newborn (HDFN) or hemolytic transfusion reaction. May be ordered for parental or fetal genotyping.

Mnemonic

RHE GENO

Methodology

Polymerase Chain Reaction/Fluorescence Monitoring

Performed

Varies

Reported

3-10 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation
Collect

Fetal genotyping: Amniotic fluid.
Cultured amniocytes: Two T-25 flasks at 80 percent confluency.
If the client is unable to culture, order test Cytogenetics Grow and Send (ARUP test code 0040182) in addition to this test and ARUP will culture upon receipt (culturing fees will apply). If you have any questions, contact ARUP's Genetics Processing at 800-522-2787 ext. 3301.
WITH maternal cell contamination specimen (see Note): Lavender (K2EDTA), Pink (K2EDTA), or Yellow (ACD Solution A or B).
Parental genotyping: Lavender (K2EDTA), Pink (K2EDTA).

Specimen Preparation

Amniotic fluid: Transport 10 mL amniotic fluid in a sterile container. (Min: 5 mL).
Cultured amniocytes: Transport two T-25 flasks at 80 percent confluency filled with culture media. Backup cultures must be retained at the client's institution until testing is complete.
Maternal cell contamination specimen: Transport 3 mL whole blood (Min: 1 mL)
Whole blood (parental genotyping): Transport 3 mL whole blood. (Min: 1 mL)

Storage/Transport Temperature

Amniotic fluid, cultured amniocytes: CRITICAL ROOM TEMPERATURE. Must be received within 48 hours of shipment due to lability of cells.
Whole blood or maternal cell contamination specimen: Refrigerated.

Unacceptable Conditions

Plasma or serum. Specimens collected in sodium heparin tubes.

Remarks

Patient History Form is available on the ARUP Web site or by contacting ARUP Client Services.

Stability

Fetal specimens: Ambient: 48 hours; Refrigerated: Unacceptable; Frozen: Unacceptable
Whole blood or maternal cell contamination specimen: Ambient: 72 hours; Refrigerated: 1 week; Frozen: 1 month

Reference Interval

By report

Interpretive Data

Refer to report

Compliance Category

FDA

Note

Maternal specimen is recommended for proper test interpretation if contamination of the fetal specimen from the mother is suspected. Order Maternal Cell Contamination.

Hotline History

View Hotline History

 

Hotline History

Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
11/14/2022
X
X
09/07/2021
X
N/A

CPT Codes

0001U

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Components

Component Test Code* Component Chart Name LOINC
3002019 RHE GENO Specimen 31208-2
3002020 RhEe Genotype 48030-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • RHCE genotyping
RhE/e (RHCE) Antigen Genotyping