Rhogam Screen (Fetal Screen)

SIM

LAB896

CPT

85461 

Synonyms

Fetal Screen; Rh Immune Globulin Screen; RhIg Screen

Specimen Type

Whole Blood 

Container

6.0 ml Pink – EDTA (preferred) 
4.0 ml Lavender – EDTA 

Collection Instructions

This specimen must be collected Post Partum.   Recommended to be drawn 1-3 hour post partum to catch the largest number of circulating fetal cells within the maternal circulation.  Test is ordered as a timed test 2 hours post delivery.    
 

Volume

Max:  6.0 ml whole blood EDTA 
Min:  1.0 ml whole blood EDTA          
 

Additional Information

This test is ordered when an admission Type & Screen was ordered/performed prior to delivery.  It only orders the post partum Rhogam Screen. 
 

Patient Preparation

None.

Specimen Processing Instructions

None.

Transport Requirements

Refrigerated.

Specimen Stability

N/A 

Rejection Criteria

Missing patient identification.  
Not a post partum specimen. 
Patient is not Rh negative. 
Patient has already been isoimmunized. 
 

Reference Range

N/A

Critical Value

N/A 

Test Includes

Fetal bleed screen with reflex quantitation (Fetaldex) if positive. 

Methodology

Rosetting method. 

Testing Frequency

Daily, Monday-Sunday 

Reviewed By

Michele Earley

Reviewed Date

3/22/23

Supplemental