T cell subsets CD4/CD8 only, counts

General Information

Lab Name

T cell subsets CD4/CD8 only, counts

Lab Code

TCS48

Epic Name

T Cell Subsets - CD4 & CD8 Only

Description

This assay provides absolute cell counts and percentages for CD4 and CD8 T cell subsets.

All lymphocyte subset panels offered:
T cell subsets CD4/CD8 only, counts [TCS48] - CD4, CD8
T cell subsets CD3/CD4/CD8, counts [TCSA] - CD4, CD8, CD3
Lymphocyte subsets, T and B cell counts [TCSP] - CD4, CD8, CD3, CD19
Lymphocyte subsets, T, B, NK cell counts [TCSNK] - CD4, CD8, CD3, CD19, CD56
CD19+ B Cell Count [BCS19] - CD19 only

References

https://onlinelibrary.wiley.com/doi/full/10.1002/cyto.b.21360

Components

Code Name
CD4P % CD4
CD4A Abs CD4 Lymphocyte Cnt
CD8P % CD8
CD8A Abs CD8 Lymphocyte Cnt
CD4CD8 CD4/CD8 Ratio
NFDA4 Test Comment

Interpretation

Method

This is a single platform lymphocyte subset assay and has been approved by the U.S. Food and Drug Administration.

Reference Range

See individual components

Ref. Range Notes

%CD4 [33-61]
Abs CD4 [0.730-2.250] Thou/ul
%CD8 [14-35]
Abs CD8 [0.250-1.240] Thou/ul
CD4/CD8 [1.00-3.78]

Interferences and Limitations

The stability limit for this FDA approved assay is 24 hours.

Guidelines

Ordering & Collection

Specimen Type

Blood

Collection

3 or 4 mL LAVENDER TOP tube.
Unacceptable: Any gel tube.

Handling Instructions

Specimens must be tested within 24 hours of collection for this FDA assay. For samples received > 24 hours after collection, test will be canceled and a re-draw will be requested. Specimens can be transported at room temperature.

Quantity

requested: 3-4 ml
minimum: 1 ml

Processing

Stability: 24 hours @Room Temperature

SPS: SPS: Sample can be shared with CBC. Do not add on test if sample will be received in the Hematopathology lab outside the 24-hour stability limit. If sample is approaching 24 hour stability limit, contact hematopathology lab (206-606-7060) to notify them that a specimen is coming and send immediately.

Outside Laboratories: Specimens must be tested within 24 hours of collection. For samples received > 24 hours after collection, test will be canceled and a re-draw will be requested. Contact Lab Med Call Center 206-685-6066 to discuss transportation options. Specimens can be sent directly to the hematopathology lab as well (include contact info).

Performance

LIS Dept Code

Hematopathology (HP)

Performing Location(s)

Other Hematopathology
206-606-7060

UW Hematopathology Laboratory, G7-800
Seattle Cancer Care Alliance
825 Eastlake Avenue E.
Seattle, WA 98109

Frequency

Monday-Sunday. For same day testing, sample must arrive in Hematopathology lab by 5pm Monday - Saturday and 2:30pm on Sunday. Testing is offered on the following holidays: Veteran's Day, MLK, Day after Thanksgiving. NOT offered on: President's day, Memorial day, 4th of July, Labor day, Thanksgiving, Christmas, or New Year’s Day.

Available STAT?

No

Billing & Coding

CPT codes

LOINC

65759-3