- CPT Code: To be determined by tests performed
This profile will be initiated most often by the RCRL if the forward and reverse ABO typing on a sample are inconsistent. Without a confirmed ABO type, group specific RBC units cannot be issued. ABO testing discrepancies must be resolved but the range of testing required can vary greatly. ABO discrepancies can result from marrow / stem cell transplants which can be easily diagnosed and resolved when an accurate patient history is provided. They can be found in geriatric, malnourished or immunosuppressed patients. These cases may take longer to resolve and require more complex testing. Testing performed may range from repeating the ABO forward and reverse typing to increasing the ratio of reagent to sample, altering the incubation temperature, increasing incubation times, absorptions, elutions, inhibitions and determination of secretor status or a family study in the case of a very rare subgroup. Communication with the facility caring for the patient will determine the necessity for complex testing and the urgency for provision of blood components. When necessary, Group O, Rh compatible units will be issued until the ABO type is confirmed.
- Sample Required: 7 mL EDTA (saliva will be requested only if secretor studies are necessary-RCRL will call)
- Normal Test Values: Group A, O, B or AB
- Analytic Time: 24 hours if weekday, 72 hours if weekend
- Days Test is Set Up: Monday through Sunday
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