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Test Code CD4RT CD4 T-Cell Recent Thymic Emigrants, Blood

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Whole Blood EDTA


Shipping Instructions


Testing is performed Monday through Friday. Specimens not received by 4 p.m. (CST) on Friday may be canceled.

 

Samples arriving on the weekend and observed holidays may be canceled.

 

Collect and package specimen as close to shipping time as possible. Ship specimen overnight in an Ambient Shipping Box-Critical Specimens Only (T668) following the instructions in the box.

 

It is recommended that specimens arrive within 24 hours of collection.



Necessary Information


Ordering healthcare professional name and phone number are required.



Specimen Required


Supplies: Ambient Shipping Box-Critical Specimens Only (T668)

Container/Tube: Lavender top (EDTA)

Specimen Volume: 3 mL

Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.


Specimen Minimum Volume

1.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole Blood EDTA Ambient 48 hours PURPLE OR PINK TOP/EDTA

Reference Values

CD4 Absolute

Males

1 month-17 years: 153-1745 cells/mcL

18-70 years: 290-1,175 cells/mcL

Reference values have not been established for patients that are younger than 30 days of age.

Reference values have not been established for patients that are older than 70 years of age.

 

Females

1 month-17 years: 582-1630 cells/mcL

18-70 years: 457-1,766 cells/mcL

Reference values have not been established for patients that are younger than 30 days of age.

Reference values have not been established for patients that are older than 70 years of age.

 

CD4 RTE %

Males

1 month-17 years: 19.4-60.9%

18-25 years: 6.4-51.0%

26-55 years: 6.4-41.7%

≥56 years: 6.4-27.7%

Reference values have not been established for patients that are younger than 30 days of age.

Reference values have not been established for patients that are older than 70 years of age.

 

Females

1 month-17 years: 25.8-68.0%

18-25 years: 6.4-51.0%

26-55 years: 6.4-41.7%

≥56 years: 6.4-27.7%

Reference values have not been established for patients that are younger than 30 days of age.

Reference values have not been established for patients that are older than 70 years of age.

 

CD4 RTE Absolute

Males

1 month-17 years: 50.0-926.0 cells/mcL

18-70 years: 42.0-399.0 cells/mcL

Reference values have not been established for patients that are younger than 30 days of age.

Reference values have not been established for patients that are older than 70 years of age.

 

Females

1 month-17 years: 170.0-1007.0 cells/mcL

18-70 years: 42.0-832.0 cells/mcL

Reference values have not been established for patients that are younger than 30 days of age.

Reference values have not been established for patients that are older than 70 years of age.

Day(s) Performed

Monday through Friday

CPT Code Information

86356

Report Available

3 to 4 days

Specimen Retention Time

4 days

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject