Browse hierarchy: [Immunology (IM)](/submissions/IM) → [Subpart F — Immunological Test Systems](/submissions/IM/subpart-f%E2%80%94immunological-test-systems) → [21 CFR 866.5550](/submissions/IM/subpart-f%E2%80%94immunological-test-systems/866.5550) → DFH — Kappa, Antigen, Antiserum, Control # DFH · Kappa, Antigen, Antiserum, Control _Immunology · 21 CFR 866.5550 · Class 2_ **Canonical URL:** https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH ## Overview - **Product Code:** DFH - **Device Name:** Kappa, Antigen, Antiserum, Control - **Regulation:** [21 CFR 866.5550](/submissions/IM/subpart-f%E2%80%94immunological-test-systems/866.5550) - **Device Class:** 2 - **Review Panel:** [Immunology](/submissions/IM) - **3rd-party reviewable:** yes ## Identification An immunoglobulin (light chain specific) immunological test system is a device that consists of the reagents used to measure by immunochemical techniques both kappa and lambda types of light chain portions of immunoglobulin molecules in serum, other body fluids, and tissues. In some disease states, an excess of light chains are produced by the antibody-forming cells. These free light chains, unassociated with gamma globulin molecules, can be found in a patient's body fluids and tissues. Measurement of the various amounts of the different types of light chains aids in the diagnosis of multiple myeloma (cancer of antibody-forming cells), lymphocytic neoplasms (cancer of lymphoid tissue), Waldenstrom's macroglobulinemia (increased production of large immunoglobulins), and connective tissue diseases such as rheumatoid arthritis or systemic lupus erythematosus. ## Classification Rationale Class II (performance standards). ## Recent Cleared Devices (20 of 63) Showing 20 most recent of 63 cleared devices. | Record | Device Name | Applicant | Decision Date | Decision | | --- | --- | --- | --- | --- | | [K253358](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K253358.md) | Diazyme Human Kappa (k) Free Light Chain Assay; Diazyme Human Lambda (¿) Free Light Chain Assay | Diazyme Laboratories, Inc. | Dec 19, 2025 | SESE | | [K250549](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K250549.md) | Optilite® Freelite Mx Kappa Free Kit; Optilite® Freelite Mx Lambda Free Kit | The Binding Site Group , Ltd. | May 23, 2025 | SESE | | [K231601](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K231601.md) | FLC Kappa, FLC Lambda,FLC Control Level 1, FLC Control Level 2 | Sebia | Feb 23, 2024 | SESE | | [K231290](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K231290.md) | Optilite® Freelite® Kappa Free Kit, Optilite® Freelite® Lambda Free Kit | The Binding Site, Ltd. | Jan 24, 2024 | SESE | | [K210623](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K210623.md) | FLC Kappa, FLC Lambda, FLC Control Level 1, FLC Control Level 2 | Sebia | Nov 18, 2022 | SESE | | [K211648](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K211648.md) | Diazyme Human Kappa Free Light Chain Assay, Diazyme Human Lambda Free Light Chain Assay | Diazyme Laboratories, Inc. | Sep 8, 2022 | SESE | | [K220001](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K220001.md) | Diazyme Human Kappa Free Light Chain Assay, Diazyme Human Lambda Free Light Chain Assay | Diazyme Laboratories, Inc. | Aug 4, 2022 | SESE | | [K212379](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K212379.md) | N Latex FLC kappa, N Latex FLC lambda | Siemens Healthcare Diagnostics Products GmbH | Mar 2, 2022 | SESE | | [K201496](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K201496.md) | N Latex FLC kappa, N Latex FLC lambda | Siemens Healthcare Diagnostics Products GmbH | Oct 29, 2021 | SESE | | [K193047](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K193047.md) | N Latex FLC kappa, N Latex FLC lambda | Siemens Healthcare Diagnostics Products GmbH | Jul 14, 2021 | SESE | | [K190879](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K190879.md) | N Latex FLC kappa, N Latex FLC lambda | Siemens Healthcare Diagnostics Products GmbH | May 3, 2019 | SESE | | [K182098](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K182098.md) | N Latex FLC kappa assay, N Latex FLC lambda assay | Siemens Healthcare Diagnostics Products GmbH | Nov 1, 2018 | SESE | | [K173732](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K173732.md) | Optilite Freelite Mx Kappa Free Kit, Optilite Freelite Mx Lambda Free Kit | The Binding Site Group , Ltd. | Aug 23, 2018 | SESE | | [K181438](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K181438.md) | Diazyme Human Kappa Free Light Chain Assay; Diazyme Human Lambda Free Light Chain Assay | Diazyme Laboratories, Inc. | Jun 26, 2018 | SESE | | [K171742](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K171742.md) | N Latex FLC kappa assay, N Latex FLC Lambda assay, N FLC Standard SL, N FLC Control SL1 & SL2 | Siemens Healthcare Diagnostics Products GmbH | Nov 17, 2017 | SESE | | [K153394](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K153394.md) | Diazyme Human Kappa Free Light Chain Assay, Diazyme Human Lambda Free Light Chain Assay, Diazyme Human Kappa/Lamda Free Light Chain Calibrator, Diazyme Human Kappa/Lamda Free Light Chain Calibrator | Diazyme Laboratories | Nov 18, 2016 | SESE | | [K150658](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K150658.md) | Optilite FreeLite Kappa Free Kit, Optilite Freelite Lambda Free Kit | The Binding Site Group , Ltd. | Aug 26, 2015 | SESE | | [K120056](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K120056.md) | HUMAN KAPPA AND LAMBDA FREE KITFOR USE ON THE SPA PLUS ANALYSER | The Binding Site Group , Ltd. | Apr 1, 2013 | SESE | | [K083602](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K083602.md) | KAPPA LIGHT CHAINS | SENTINEL CH. SpA | Sep 3, 2009 | SESE | | [K082503](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH/K082503.md) | DIMENSION VISTA LG LIGHT CHAINS, TYPE KAPPA, DIMENSION VISTA LG LIGHT CHAINS, TYPE LAMBDA, DIMENSION VISTA PROTEIN 1 CAL | Siemens Healthcare Diagnostics | Dec 19, 2008 | SESE | ## Top Applicants - Amico Lab, Inc. — 14 clearances - The Binding Site, Ltd. — 8 clearances - Siemens Healthcare Diagnostics Products GmbH — 6 clearances - The Binding Site Group , Ltd. — 4 clearances - Diazyme Laboratories, Inc. — 4 clearances --- **Source:** [https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH](https://fda.innolitics.com/submissions/IM/subpart-f%E2%80%94immunological-test-systems/DFH) **Published by [Innolitics](https://innolitics.com)** — a medical-device software consultancy. We help companies design, build, and clear FDA-regulated software and AI/ML devices. 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