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on Saturday, February 21, 3:00 pm through Tuesday, March 03, 9:00 pm (PST), 2026

Ordering can continue through fax and phone.

Acquire your EV samples and explore the power of “OR” thresholding

Step 3: Apply proper controls, calibration and thresholding strategy

Use MiFlowCyt-EV framework for publication to guide you on assay controls and SP SSC and fluorescence calibration
Use “OR” thresholding for SP SSC and relevant fluorescent parameters for maximum information
Consider running serial dilution series to check for absence of swarming

3.1 Buffy only*	3.5 Single-stained controls*
3.2 Buffer with reagents*	3.6 Procedural controls*
3.3 Unstained controls*	3.7 Serial dilution*
3.4 Isotype controls	3.8 Detergent-treated EV samples

Welsh JA, et al. Journal of Extracellular Vesicles. 20209;(1):1713526.

Overview

Flow cytometry is widely used for disease-specific assessments and immunophenotyping of immune cell populations. This evaluation help in diagnosis of immune deficiencies. Determining lymphocyte subsets can generate more insights of the immune system than a complete blood count (CBC).

Learn more on solutions to diagnose primary immune deficiencies Learn more on secondary immune deficiencies

BD Multitest™ 6-Color TBNK reagent with optional BD Trucount™ Tubes is a six-color direct immunofluorescence reagent for use in identifying and determining the percentages and absolute counts of T, B, and natural killer (NK) cells, as well as the CD4+ and CD8+ subpopulations of T cells, in peripheral blood on a BD flow cytometer.

Determining percentages or absolute counts of CD3+CD4+ T lymphocytes is used in monitoring human immunodeficiency virus (HIV)-infected individuals. Individuals with HIV typically exhibit a steady decrease of CD3+CD4+ T-lymphocyte absolute counts as the infection progresses.1

Determining percentages or absolute counts of CD3+, CD3+CD4+, or CD3+CD8+ T lymphocytes or CD19+ B lymphocytes is used to characterize or monitor some forms of immune deficiency and autoimmune diseases.1,2 Determining percentages or absolute counts of CD3– and CD16+ and/or CD56+ NK lymphocytes is used in immunological assessment of hematologically-normal subjects or patients having, or suspected of having, immune deficiency or other immune-mediated diseases.1,3

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Why BD Multitest™ 6-color
TBNK Kit?

Performs lymphocyte enumeration of mature T, B and NK cells in a single tube
Provides the option of absolute counts when paired with BD Trucount™ Tubes
Works in a fully integrated system with BD FACSDuet™ Sample Preparation System for automated sample preparation allwoing a complete automated workflow from sample to answer, reducing hands-on time and error-prone steps.
Can be used with BD FAC™ Universal Loader for automated sample acquisition on BD FACSLyric™
CE-IVD assay modules with built-in templates and automated gating to work on BD FACSLyric™ instrument software for setup, QC, acquisition analysis and reporting. Seamless integration of data reporting of test and patient results through bidirectional LIS connectivity.

Features

The BD Multitest™ 6-Color TBNK Kit Simplifies Your Workflow and Increases Productivity

An easy-to-use Solution
With its single-tube format, the BD Multitest™ 6-Color TBNK reagent decreases cost by reducing the number of tubes and sample processing time. The reagent includes a cocktail of multiple fluorescently labeled monoclonal antibodies, premixed at the appropriate titer to ensure quality staining.
Accurate cell counts with BD Trucount™ Tubes
BD Trucount™ Tubes help to ensure more accurate cell counts - requires no additional pipetting steps, precise and reproducible. The tubes contain a lyophilized pellet of fluorescent beads that serves as an internal standard. BD FACSuite™ Clinical Application automatically calculates lymphocyte absolute counts and subset percentages.
Improve safety, reduce hands-on time
The BD Multitest™ 6-Color TBNK reagent employs a no-wash formula that reduces tube handling. Processing fewer tubes in less time may decrease potential exposure to biohazardous material, improving safety for laboratory personnel.
Increase productivity

Together with the BD FACSLyric™ cell analyzer and BD FACSuite™ software, the BD FACS™ Universal Loader option and the BD FACSDuet™ Sample Preparation System, the BD Multitest™ 6-Color TBNK reagent provides a fully automated, standardized and efficient workflow for lymphocyte enumeration to best suit your routine immunophenotyping needs.

Applications

The BD Multitest™ 6-Color TBNK reagent with Trucount™ tube for accurate and reliable enumeration of mature T, B and NK cells.

A single tube, single platform CE- IVD assay utilizing BD Trucount™ Tube technology

A hematological normal adult sample with BD Multitest™ 6 Color TBNK in a BD Trucount™ Tube wasacquired on a BD FACSLyric™ Flow Cytometer.

BD FACSLyric™ laboratory report showing data collected with BD Trucount™ Tubes. See the BD FACSLyric™ Clinical Reference System, which provides information on gating and troubleshooting.