ROCHE DIAGNOSTICS TINA-QUANT IGG GEN.2

K040434 · Roche Diagnostics Corp. · DEW · Mar 10, 2004 · Immunology

Device Facts

• Record ID: K040434
• Device Name: ROCHE DIAGNOSTICS TINA-QUANT IGG GEN.2
• Applicant: Roche Diagnostics Corp.
• Product Code: DEW · Immunology
• Decision Date: Mar 10, 2004
• Decision: SESE
• Submission Type: Special
• Regulation: 21 CFR 866.5510
• Device Class: Class 2
• Attributes: Pediatric

Intended Use

Immunoturbidimetric assay for the quantitative in vitro determination of IgG in human serum and plasma on Roche automated clinical chemistry analyzers. Measurement aids in the diagnosis of abnormal protein metabolism and the body's lack of ability to resist infectious agents.

Device Story

Tina-quant IgG Gen.2 is an in vitro diagnostic immunoturbidimetric assay for quantitative IgG measurement in serum and plasma. It serves as a modification of the previously cleared Tina-quant IgG assay (K955906). Modifications include reagent formulation changes to mitigate hook effect and lipemic sample interference, an expanded measuring range (40-28100 mg/dL with rerun), and updated pediatric reference ranges (0-19 years). The device operates on Roche/Hitachi clinical chemistry analyzers. It is intended for use by laboratory professionals to assess IgG levels, which may be relevant in diagnosing or monitoring conditions associated with IgG deficiency or elevation. The output is a quantitative concentration value used by clinicians to inform patient management.

Clinical Evidence

No clinical data provided. Substantial equivalence is based on analytical performance comparisons, including measuring range and reference value updates.

Technological Characteristics

Immunoturbidimetric assay; utilizes anti-IgG antibodies for antigen-antibody complex formation; measured via turbidimetry on automated clinical chemistry analyzers. No specific materials or software architecture details provided.

Indications for Use

Indicated for the quantitative in vitro determination of IgG in human serum and plasma to aid in the diagnosis of abnormal protein metabolism and immune deficiency. For use in clinical laboratory settings on Roche automated chemistry analyzers.

Regulatory Classification

Identification

An immunoglobulins A, G, M, D, and E immunological test system is a device that consists of the reagents used to measure by immunochemical techniques the immunoglobulins A, G, M, D, an E (serum antibodies) in serum. Measurement of these immunoglobulins aids in the diagnosis of abnormal protein metabolism and the body's lack of ability to resist infectious agents.

Predicate Devices

• Tina-quant IgG (K955906)

Submission Summary (Full Text)

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SPECIAL 510(k): Device Modification ODE Review Memorandum

To: THE FILE

RE: DOCUMENT NUMBER K040434

This 510(k) submission contains information/data on modifications made to the SUBMITTER'S own Class II, Class III or Class I devices requiring 510(k). The following items are present and acceptable (delete/add items as necessary):

1. Roche Diagnostics Tina-quant IgG assay previously cleared K955906
2. Submitter's statement that the INDICATION/INTENDED USE of the modified device as described in its labeling HAS NOT CHANGED along with the proposed labeling which includes instructions for use, package labeling, and, if available, advertisements or promotional materials.
3. A description of the device MODIFICATION(S), including clearly labeled diagrams, engineering drawings, photographs, user's and/or service manuals in sufficient detail to demonstrate that the FUNDAMENTAL SCIENTIFIC TECHNOLOGY of the modified device has not changed.

The modifications to the assay include:
- Changes in reagent formulation
- Broadening the measuring range
- Changing the name of the assay to Tina-quant IgG Gen.2

4. Comparison Information (similarities and differences) to applicant's legally marketed predicate device including, labeling, intended use, physical characteristics, additional expected value ranges for children 0-19 years and change in measuring range as follows:

| Tina-quant IgG (K955906) | Tina-quant IgG Gen.2 |
| --- | --- |
| Roche/Hitachi 902 | Roche/Hitachi 902 |
| 300-3100 mg/dL | 300-3500 mg/dL |
| Roche/Hitachi | Roche/Hitachi |
| 904/911/912/917/Modular | 904/911/912/917/Modular |
| 300-3500 mg/dL | 300-3500 mg/dL |
| 100-19300 mg/dL with rerun | 40-28100 mg/dL with rerun |
| Expected values | Expected values |
| Adults: 700-1600 mg/dL | Adults: 700-1600 mg/dL |
| | Additional ranges for children |
| | 0-19 years |

5. A Design Control Activities Summary which includes:
a) Identification of Risk Analysis method(s) used to assess the impact of the modification on the device and its components, and the results of the analysis- FMEA (Failure mode and effects analysis) see section IV, p.25.
b) Based on the Risk Analysis, an identification of the verification and/or validation activities required, including methods or tests used and acceptance criteria to be applied (see section IV pages 26-27).
c) A declaration of conformity with design controls (see section IV, p.28). The declaration of conformity should include:
i) A statement signed by the individual responsible, that, as required by the risk analysis, all verification and validation activities were performed by the designated individual(s) and the results demonstrated that the predetermined acceptance criteria were met, and

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ii) A statement signed by the individual responsible, that the manufacturing facility is in conformance with design control procedure requirements as specified in 21 CFR 820.30 and the records are available for review.

6. A Truthful and Accurate Statement, a 510(k) Summary or Statement and the Indications for Use Enclosure (and Class III Summary for Class III devices).

The labeling for this modified subject device has been reviewed to verify that the indication/intended use for the device is unaffected by the modification. In addition, the submitter's description of the particular modification(s) and the comparative information between the modified and unmodified devices demonstrate that the fundamental scientific technology has not changed. The submitter has provided the design control information as specified in The New 510(k) Paradigm and on this basis, I recommend the device be determined substantially equivalent to the previously cleared (or their preamendment) device.

Comments

The sponsor provided information on why modifications were made in reagent formulation, the utility of the sensitive application and why sample stability changed in the modified devices.

The reagent modifications were made to reduce the hook effect and interference caused by lipemic samples. The changes in assay performance due to these modifications were validated and acceptance criteria for assay performance were met.

The sensitive application is used to measure analytes below the expected range. Decreased levels of IgA and IgM can be seen in congenital and acquired deficiency diseases, protein-losing gastroenteropathies, and burns.

The sample stabilities were updated to reflect the latest recommendations from WHO. The acceptable anticoagulants did not change. The labeling was updated to include the cationic component of each anticoagulant instead of only the anticoagulant name.

Reference values for pediatric were derived from CRM 470 Protein Standardization. A reference regarding pediatric ranges was provided. The need for a laboratory to investigate transferability of the expected values to one's own patient population is stated in the package insert.