DIMENSION VISTA C3 AND C4 FLEX REAGENT CARTRIDGE, PROTEIN 1 CALIBRATOR, CONTROL LOW, MEDIUM, HIGH

K061852 · Dade Behring, Inc. · CZW · Sep 22, 2006 · Immunology

Device Facts

• Record ID: K061852
• Device Name: DIMENSION VISTA C3 AND C4 FLEX REAGENT CARTRIDGE, PROTEIN 1 CALIBRATOR, CONTROL LOW, MEDIUM, HIGH
• Applicant: Dade Behring, Inc.
• Product Code: CZW · Immunology
• Decision Date: Sep 22, 2006
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 866.5240
• Device Class: Class 2

Indications for Use

Dimension Vista™ C3 Flex® reagent cartridge: The C3 method is an in vitro diagnostic test for the quantitative measurement of complement C3 in human serum and heparinized plasma on the Dimension Vista™ System. Measurements of C3 are used as an aid in the diagnosis of immunologic disorders associated with complement C3 protein. Dimension Vista™ C4 Flex® reagent cartridge: The C4 method is an in vitro diagnostic test for the quantitative measurement of complement C4 in human serum and heparinized plasma on the Dimension Vista™ System. Measurements of C4 are used as an aid in the diagnosis of immunologic disorders associated with complement C4 protein. Dimension Vista™ Protein 1 Calibrator: Protein 1 Calibrator is an in vitro diagnostic product for the calibration of the C3 Complement (C3), C4 Complement (C4), Immunoglobulin A (IGA), Immunoglobulin G (IGG), and Immunoglobulin M (IGM) on the Dimension Vista™ System. Dimension Vista™ Protein 1 Control L, Dimension Vista™ Protein 1 Control M and Dimension Vista™ Protein 1 Control H: Protein 1 Control L/M/H are for use as an assayed intralaboratory quality controls for the assessment of precision and analytical bias in determination of C3 Complement (C3), C4 Complement (C4), Immunoglobulin A (IGA), Immunoglobulin G (IGG) and Immunoglobulin M (IGM) methods on the Dimension Vista™ System.

Device Story

Dimension Vista™ C3/C4 Flex® reagent cartridges are in vitro diagnostic reagents for use on the Dimension Vista™ System. System utilizes immunochemical reaction where proteins in human serum/plasma form immune complexes with specific antibodies; complexes scatter light beam passed through sample. Scattered light intensity is proportional to protein concentration. Results evaluated against known calibrator. System intended for clinical laboratory use. Calibrator and controls (L/M/H) are liquid human serum-based products used to calibrate assays and assess precision/analytical bias. Device aids clinicians in diagnosing immunologic disorders by providing quantitative protein measurements.

Clinical Evidence

No clinical data. Performance established via bench testing: precision (CLSI EP5-A2), linearity, analytical sensitivity, and interference studies. Method comparison performed against BN ProSpec system using 116 samples for C3 and 126 samples for C4, showing strong correlation (Passing-Bablock regression).

Technological Characteristics

Immunonephelometric assay; 840nm light source. Reagents: rabbit polyclonal antibodies. Cartridges: 12-well format with barcode identification. Calibrators/Controls: human serum-based. Connectivity: integrated with Dimension Vista System. Standards: CLSI EP5-A2, EP9-A2, EP7-A2; Traceability to CRM 470.

Indications for Use

Indicated for use as an aid in the diagnosis of immunologic disorders associated with complement C3 and C4 proteins in serum and heparinized plasma samples.

Regulatory Classification

Identification

A complement components immunological test system is a device that consists of the reagents used to measure by immunochemical techniques complement components C1q , C1r , C1s , C2 , C3 , C4 , C5 , C6 , C7 , C8 , and C9 , in serum, other body fluids, and tissues. Complement is a group of serum proteins which destroy infectious agents. Measurements of these proteins aids in the diagnosis of immunologic disorders, especially those associated with deficiencies of complement components.

Predicate Devices

• Dade Behring N Antisera to Human Complement Factors (C3c, C4) (k050665)

Submission Summary (Full Text)

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# 510(k) SUBSTANTIAL EQUIVALENCE DETERMINATION DECISION SUMMARY

A. 510(k) Number:
k061852

B. Purpose for Submission:
New devices

C. Measurand:
Complement C3 and Complement C4

D. Type of Test:
Quantitative, Nephelometry

E. Applicant:
Dade Behring Inc

F. Proprietary and Established Names:
Dimension Vista™ C3 Flex® Reagent Cartridge
Dimension ™ Vista C4 Flex® Reagent Cartridge
Dimension Vista Protein 1 Calibrator
Dimension Vista Protein 1 Control L
Dimension Vista Protein 1 Control M
Dimension Vista Protein 1 Control H

G. Regulatory Information:

1. Regulation section:
21 CFR 866.5240, Complement Components Immunological Test System
21 CFR 862.1150 Calibrator
21 CFR. 862.1660 Quality Control Material

2. Classification:
Class II

3. Product code:
CZW, complement C3 antigen, antiserum, control
DBI, Complement C4 antigen, antiserum, control
JIX, Calibrator, Multi-Analyte Mixture
JJY, Multi-Analyte Controls, all kinds (assayed and unassayed)

4. Panel:
Immunology (82)
Chemistry (75)

H. Intended Use:

1. Intended use(s):
Dimension Vista™ C3 Flex® reagent cartridge is for quantitative measurement of complement C3 serum and heparinized plasma on the Dimension Vista™ System. Measurements of C3 are used as an aid in the diagnosis of immunologic disorders associated with C3 complement protein.

Dimension Vista™ C4 Flex® reagent cartridge is for quantitative measurement of complement C4 in serum and heparinized plasma on the Dimension Vista™ System. Measurements of C4 are used as an aid in the diagnosis of immunologic disorders

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associated with C4 complement protein.

Dimension Vista™ Protein 1 Calibrator is an in vitro diagnostic product for the calibration of the C3 complement (C3), C4 complement (C4), Immunoglobulin A (IgA), Immunoglobulin G (IgG) and Immunoglobulin M (IgM) on the Dimension Vista™ System.

Dimension Vista™ Protein 1 Control L, M and H are for use as an assayed intralaboratory quality controls for the assessment of precision and analytical bias in determination of C3 complement (C3), C4 complement (C4), Immunoglobulin A (IgA), Immunoglobulin G (IgG) and Immunoglobulin M (IgM) on the Dimension Vista™ System.

2. Indication(s) for use:
To aid in the diagnosis of immunologic disorders associated with complement C3 and C4 Proteins

3. Special conditions for use statement(s):
For prescription use only

4. Special instrument requirements:
For use with Dade Behring Dimension Vista™ System.

I. Device Description:
The Dade Dimension C3 and C4 devices are in the form of cartridges each with 12 wells: 1-8 contains reaction buffer, 9-12 contains antiserum to human C3 or C4. The cartridges hold all the reagents for a test method. A bar code label on the cartridge identifies the test method, lot number, expiration date, and the maximum number of tests for which the cartridge can supply reagents.

Dimension Vista Protein 1 Calibrator carton contains 6 vials of reagent with 2mL per vial. The calibrator is a liquid human serum based product containing multiple analytes namely C3, C4, IgA, IgM and IgG.

Dimension Vista Protein 1 Controls consist of three levels (low, medium and high). Each level contains 6 vials with 2 mL per vial. The controls are ready to use human serum based products containing C3, C4, IgA, IgM, IgG.

J. Substantial Equivalence Information:

1. Predicate device name(s):
Dade Behring N Antisera to Human Complement Factors (C3c, C4)

2. Predicate 510(k) number(s):
k050665 (C3 and C4)

3. Comparison with predicate:

| Similarities | | |
| --- | --- | --- |
| Item | Device | Predicate |
| Intended use | For quantitative determination of C3 and C4 protein as an aid in | Same |

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| Similarities | | |
| --- | --- | --- |
| Item | Device | Predicate |
| | the diagnosis of C3 and C4 associated immunological disorders | |
| Antibody | Rabbit polyclonal | Same |
| Methodology | Nephelometric | Same |
| Traceability | CRM 470 IFCC/BCR/CAP | Same |
| Differences | | |
| --- | --- | --- |
| Item | Device | Predicate |
| Instrument | Dimension™ Vista System | BN™System |
| Sample type | Serum and lithium heparin plasma | Serum and plasma (EDTA and heparin) |
| Reportable range | C3-0.16-4.1 g/L C4- 0.06-1.6g/L | C3c - 0.12 - 4.1g/L C4 - 0.06 - 1.9g/L |

# K. Standard/Guidance Document Referenced (if applicable):

CLSI EP5-A2, CLSI EP9-A2, CLSI EP7-A2.

# L. Test Principle:

The method used for quantitative measurement of C3 and C4 is immunonephelometry. The samples when mixed with reagents (automatically done by the instrument) in the cartridge an immunological reaction results in forming an immune complexes with C3 or C4 contained in the sample. A light beam is passed through the complex and the intensity of light scattering is measured at $840\mathrm{nm}$ . The intensity of scattered light is proportional to the concentration of the respective analyte in the sample. C3 or C4 concentrations are automatically calculated by the instrument from the multiple calibration curves.

# M. Performance Characteristics (if/when applicable):

# 1. Analytical performance:

# a. Precision/Reproducibility:

Precision studies were performed according to CLSI EP5-A2. During each day of testing two separate samples for each test material were analyzed for 20 days. For C3, samples tested included 4 serum pools and 3 controls (low, medium and high). For C4, 3 controls (L, M, H), 2 plasma samples and 2 serum samples with different analyte concentrations. The acceptance criteria are shown below.

The maximum observed repeatability (SD)

| Analyte | Concentration | Acceptable SD Maximum |
| --- | --- | --- |
| C3 | 0.75g/L | 0.16g/L |
| | 1.2g/L | 0.18g/L |
| C4 | 0.15g/L | 0.02g/L |
| | 0.23g/L | 0.03g/L |

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The following table is a summary of the precision data:

| Material | Mean g/L | Within-run SD (%CV) | Run-to-Run SD (%CV) | Day-to-Day SD (%CV) | Total Precision SD (%CV) |
| --- | --- | --- | --- | --- | --- |
| C3 | | | | | |
| Protein1 Con L | 0.946 | 0.0321 (3.4) | 0.0172 (1.8) | 0.0107 (1.1) | 0.0380 (4.0) |
| Protein 1 Con M | 1.499 | 0.035 (2.3) | 0.009 (0.6) | 0.000 (0.0) | 0.036 (2.4) |
| Protein 1 Con H | 1.843 | 0.043 (2.3) | 0.000 (0.0) | 0.002 (0.1) | 0.043 (2.4) |
| Serum pool 1 | 1.993 | 0.030 (1.5) | 0.039 (2.0) | 0.028 (1.4) | 0.057 (2.9) |
| Serum pool 2 | 1.979 | 0.057 (2.9) | 0.018 (0.9) | 0.013 (0.7) | 0.061 (3.1) |
| Serum pool VL | 0.289 | 0.017 (5.9) | 0.000 (0.0) | 0.003 (1.1) | 0.017 (6.0) |
| Serum pool VH | 3.939 | 0.091 (2.3) | 0.078 (2.0) | 0.000 (0.0) | 0.120 (3.0) |
| C4 | | | | | |
| Protein 1 Con L | 0.1301 | 0.0048 (3.7) | 0.0000 (0.0) | 0.0017 (1.3) | 0.0051 (3.9) |
| Protein 1 Con M | 0.2052 | 0.0039 (1.9) | 0.0017 (0.8) | 0.0034 (1.7) | 0.0054 (2.6) |
| Protein 1 Con H | 0.3201 | 0.0051 (1.6) | 0.0042 (1.3) | 0.0015 (0.5) | 0.0068 (2.1) |
| Serum low | 0.1389 | 0.0047 (3.4) | 0.0033 (2.4) | 0.0000 (0.00) | 0.0057 (4.1) |
| Serum high | 1.4038 | 0.0449 (3.2) | 0.0094 (0.7) | 0.0000 (0.0) | 0.0459 (3.3) |
| Plasma low | 0.1272 | 0.0049 (3.8) | 0.0025 (1.9) | 0.0011 (0.9) | 0.0056 (4.4) |
| Plasma high | 0.4202 | 0.0131 (3.1) | 0.0206 (4.9) | 0.0000 (0.0) | 0.0244 (5.8) |

# b. Linearity/assay reportable range:

Linearity across the assay range was determined by testing serial dilutions of a high C3 and a high C4 sample over the assay measuring range. Each dilution was tested in replicates of five. Percent recovery was calculated as mean of observed/expected concentration x 100. The mean percents recovery for C3 and C4 were $94.9\%$ (ranged from $87.2\%$ to $100\%$ ) and $99.5\%$ (ranged from $92.7\%$ to $104.1\%$ ). Linear regression analysis showed for C3, the slope was 0.989, the intercept was -0.0332 and $\mathrm{r}^2$ of 0.999. For C4, the slope was 1.0108, intercept was -0.0019 and $\mathrm{r}^2$ 0.9996.

Measuring range (reportable range): for $\mathrm{C3} = 0.16 - 4.1\mathrm{g / L}$ for initial 1:20 dilution of samples that are automatically processed by the instrument. Samples with results in excess of $4.1\mathrm{g / L}$ can be repeated on a higher dilution (1:200). Samples with results less than $0.16\mathrm{g / L}$ can be repeated on a lower dilution (1:5). Samples with results less than $0.04\mathrm{g / L}$ will be reported as "less than $0.04\mathrm{g / L}$ " by the instrument.

For Compliment 4 the measuring range is $0.06 - 1.6\mathrm{g / L}$ . This is the measuring range for the initial 1:10 dilution of samples that are automatically processed by the instrument. Samples with excess of $1.6\mathrm{g / L}$ can be repeated on a higher dilution (1:100). Samples with results less than $0.06\mathrm{g / L}$ can be repeated on a lower dilution (1:2.5). Samples less than $0.015\mathrm{g / L}$ will be reported as "less than $0.015\mathrm{g / L}$ " by the instrument.

c. Traceability, Stability, Expected values (controls, calibrators, or methods): Reference standard used was ERM®-DA470 (CRM 470). C3 and C4 values of the master lots of the calibrator and controls are assigned against the reference standard.
d. Detection limit:

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The detection limits was determined by assaying the diluent and Cal 1 twenty times each. The analytical sensitivity for C3 was 0.047 g/L and 0.003 g/L for C4.

e. Analytical specificity:

Interferences by endogenous substances namely conjugated bilirubin (60 mg/dL), unconjugated bilirubin (60 mg/dL), creatinine (30 mg/dL), hemoglobin (1000 mg/dL), IgG (5 g/dL), albumin (6 g/dL), urea (500 mg/dL), cholesterol (500 mg/dL), uric acid (20 mg/dL) and triglycerides (924 mg/dL) were spiked into aliquots of a serum sample and assayed for C3 and C4. The spiked samples were compared to the unspiked sample and % recoveries were calculated. The acceptance criterion for % recovery was ±10%. Results showed no interference at the concentrations tested. Interference due to RF and total protein was also determined and no significant interference was observed.

In addition, drug interference was assessed. No observable interference with the drugs tested.

f. Assay cut-off:

Not applicable

2. Comparison studies:

a. Method comparison with predicate device:

Method comparison between Dimension Vista and BN ProSpec was performed on 116 samples for C3 (58 serum and plasma n=58). Passing-Bablock regression analysis yielded a slope of 0.960 (95% CI: 0.943, 0.975) and intercept of 0.041 (95%CI: 0.016, 0.069).

For C4, 66 serum samples and 60 plasma samples were tested. Passing-Bablock analysis of the results yielded a slope of 1.041 (95% CI: 1.025, 1.059) and intercept 0.006 (95%CI: 0.001, 0.016).

b. Matrix comparison:

Anti-coagulant effects were evaluated using 10 samples, comparing serum and plasma (lithium heparin and sodium heparin) with C3 concentrations ranging from 0.31-3.96 g/L. Linear regression analysis was performed and results are summarized below.

| Analyte | Matrix | Linear Regression Analysis | | |
| --- | --- | --- | --- | --- |
| | | Slope | Intercept | Correlation coefficient (r) |
| C3 | Serum vs. lithium plasma | 1.00 (95% CI: 0.99, 1.01) | -0.02 | 1.00 |
| | Serum vs. sodium plasma | 1.02 (95% CI: 0.99, 1.06) | -0.06 | 1.00 |
| C4 | Serum vs. lithium plasma | 1.08 (95% CI: 1.04, 1.11) | -0.04 | 1.00 |
| | Serum vs. sodium plasma | 1.08 (95% CI: 1.03, 1.14) | -0.05 | 1.00 |

3. Clinical studies:

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a. Clinical Sensitivity:
Not applicable

b. Clinical specificity:
Not applicable

c. Other clinical supportive data (when a. and b. are not applicable):
Not applicable

4. Clinical cut-off:
Not applicable

5. Expected values/Reference range:
The reference interval quoted is from literature for healthy subjects (same for both serum and plasma).
Expected values:
C3 = 0.9-1.8g/L
C4 = 0.1-0.4g/L

N. Proposed Labeling:
The labeling is sufficient and it satisfies the requirements of 21 CFR Part 809.10.

O. Conclusion:
The submitted information in this premarket notification is complete and supports a substantial equivalence decision.