(208 days)
Immunoassay for the in vitro qualitative detection of antibodies to hepatitis C virus (HCV) in human adult and pediatric (ages 18 months through 21 years) serum and plasma (potassium EDTA, lithium heparin, sodium heparin, and sodium citrate). Assay results, in conjunction with other laboratory results and clinical information, may be used to aid in the presumptive diagnosis of HCV infection in persons with signs and symptoms of hepatitis and in persons at risk for hepatitis C infection. The test does not determine the state of infection or associated disease.
The electrochemiluminescence immunoassay "ECLIA" is intended for use on cobas e immunoassay analyzers.
Immunoassay for the in vitro qualitative detection of antibodies to hepatitis C virus (HCV) in human adult and pediatric (ages 18 months through 21 years) serum and plasma (potassium EDTA, lithium heparin, sodium heparin, and sodium citrate). Assay results, in conjunction with other laboratory results and clinical information, may be used to aid in the presumptive diagnosis of HCV infection in persons with signs and symptoms of hepatitis and in persons at risk for hepatitis C infection. The test does not determine the state of infection or associated disease.
The electrochemiluminescence immunoassay "ECLIA" is intended for use on cobas e immunoassay analyzers.
The Elecsys Anti-HCV II Immunoassay employs "ECLIA" technology and is a qualitative serologic, two step sandwich assay. The assay detects total antibodies to HCV in serum and plasma samples. The total duration of the assay is 18 minutes. The basic device methodology is as follows:
- 1st incubation: 50 µL of sample, 55 µL of a reagent containing biotinylated HCV antigens, and 55 µL of a reagent containing HCV antigens labeled with a ruthenium complex react to form a sandwich complex.
- 2nd incubation: After addition of streptavidin-coated microparticles, the complex becomes bound to the solid phase via interaction of biotin and streptavidin.
- The reaction mixture is aspirated into the measuring cell where the microparticles are magnetically captured onto the surface of the electrode. Unbound substances are then removed with ProCell. Application of a voltage to the electrode then induces chemiluminescent emission, which is measured by a photomultiplier.
- Results are determined automatically by the Elecsys software by comparing the electrochemiluminescence signal obtained from the sample with the cut-off value obtained by the anti-HCV calibration.
The provided text is a 510(k) summary for the Elecsys Anti-HCV II immunoassay, which is an in vitro diagnostic device used to detect antibodies to the Hepatitis C Virus (HCV). This document describes the device's technical updates and demonstrates its substantial equivalence to a previously cleared predicate device.
Here's an analysis based on your request:
1. Table of acceptance criteria and the reported device performance
The document does not explicitly present a table of "acceptance criteria" with corresponding "reported device performance" in the format typically seen for AI/ML device studies where metrics like sensitivity, specificity, or AUC are compared against predefined thresholds.
Instead, for this immunoassay device, performance is evaluated through various analytical studies. The document states that "All predefined acceptance criteria was met for the precision experiments." This implies that there were acceptance criteria for precision (e.g., CV% limits for repeatability and intermediate imprecision), but the specific numerical criteria and achieved performance values are not detailed in this summary.
Similarly, for biotin interference, the acceptance criterion implicitly appears to be that "No biotin interference was observed up to 2520 ng/mL." The reported performance is that this criterion was met.
For the method comparison, the acceptance criteria would be for Positive Agreement (PPA) and Negative Agreement (NPA) and are implicitly stated to have been met by the conclusion that "The resulting data support the equivalence of the current non-biotin and biotin-updated assay." No specific thresholds or calculated agreement percentages are provided.
For stability, the acceptance criteria would relate to maintaining performance for the stated shelf-life (12 months), on-board stability (31 days), and calibration stability (1 month). The document states, "The stability studies and acceptance criteria have been reviewed and found to be acceptable. The stability data supports Roche Diagnostic's claims as reported in the package labeling."
Therefore, while acceptance criteria were in place and met, the specific quantitative values for both the criteria and the device's performance against them are not explicitly tabulated in this 510(k) summary.
2. Sample size used for the test set and the data provenance
- Precision Study: "The protocol consisted of testing 2 aliquots of each of controls and 5 human serum samples per run, 2 runs per day for 12 days."
- This implies a total of (2 controls + 5 samples) * 2 aliquots/sample * 2 runs/day * 12 days = 336 measurements for the precision study, although the 'sample size' in terms of unique human serum samples is 5.
- Biotin Interference Study: "three serum samples (negative, low positive and moderate positive)" were used. Each sample was further divided and subjected to a "series of 17 dilution steps."
- This indicates a sample size of 3 unique serum samples (negative, low positive, moderate positive), from which multiple measurements were taken across 17 dilutions.
- Method Comparison Study: "A total of 219 samples were measured."
- Data Provenance: The document does not specify the country of origin of the data. Given it's a Roche Diagnostics submission, the samples typically originate from multiple sites, often worldwide, but this is not stated. The studies are described as non-clinical/analytical studies, meaning they are laboratory evaluations of the device's performance characteristics rather than studies on patient outcomes in a clinical setting (which would determine retrospective or prospective). Therefore, the "retrospective or prospective" designation is not directly applicable in the same way it would be for a clinical trial. These are laboratory-based characterization studies.
3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts
This information is not applicable to this type of device and study. The Elecsys Anti-HCV II is an immunoassay designed to detect antibodies to HCV. The "ground truth" for this device's analytical performance (precision, interference, method comparison) is based on:
- Known concentrations/statuses of analytes: For precision, controls and spiked samples with known HCV antibody levels are used.
- Reference methods: For method comparison, it refers to "current Elecsys Anti-HCV II assay," which serves as the reference.
- Spiking experiments: For interference studies, known interfering substances (biotin) are spiked into samples.
There are no human experts "establishing ground truth" in the diagnostic interpretation sense for these analytical performance studies. The studies evaluate the device's ability to accurately measure or detect analytes under controlled laboratory conditions.
4. Adjudication method for the test set
This information is not applicable. Adjudication methods (like 2+1, 3+1) are typically used in clinical studies involving interpretation by multiple readers (e.g., radiologists reviewing images) to resolve discrepancies and establish a consensus ground truth. For an immunoassay, the result is a quantitative or qualitative output from the instrument based on chemical reactions.
5. If a multi-reader multi-case (MRMC) comparative effectiveness study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance
This information is not applicable. The Elecsys Anti-HCV II is an immunoassay, not an AI-powered diagnostic device that assists human readers in interpreting complex data like medical images. It directly measures bio-markers. Therefore, MRMC studies and the concept of "human readers improving with AI assistance" are irrelevant to this device.
6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done
The device itself is a "standalone" system in the sense that the immunoassay analyzes the sample and provides a result (qualitative detection of HCV antibodies). There isn't an "algorithm only" performance study in the context of AI/ML, but rather the analytical performance of the entire assay system (reagents, analyzer, software) is evaluated. The studies described (precision, interference, method comparison, stability) demonstrate the standalone performance of the device.
7. The type of ground truth used
The ground truth used for these analytical studies is based on:
- Known states/concentrations: For precision and interference, this involves using certified reference materials, quality controls, and samples spiked with known concentrations of HCV antibodies or interfering substances.
- Predicate device's performance: For method comparison, the "current Elecsys Anti-HCV II assay" (the predicate device) serves as the reference standard against which the updated device's performance is compared to demonstrate equivalence.
- Expected assay behaviors: For stability, the ground truth is the expectation that the device should continue to perform within specified limits over time under various storage and operational conditions.
It is not based on expert consensus, pathology, or outcomes data, as those are typically relevant for clinical diagnostic accuracy studies or AI-driven image analysis.
8. The sample size for the training set
This information is not applicable. The Elecsys Anti-HCV II is a traditional immunoassay, not a machine learning or AI-driven device that requires a "training set" in the computational sense. The device's mechanism is based on established biochemical reactions (electrochemiluminescence immunoassay, ECLIA). Its performance characteristics are determined by the design and manufacturing of its components rather than by a model trained on a dataset.
9. How the ground truth for the training set was established
This information is not applicable for the same reason as point 8. There is no training set for this type of device.
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January 4, 2023
Image /page/0/Picture/1 description: The image shows the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health & Human Services logo. To the right of that is the FDA logo, which is a blue square with the letters "FDA" in white. To the right of the blue square is the text "U.S. FOOD & DRUG ADMINISTRATION" in blue.
Roche Diagnostics Bin Sun Regulatory Affairs Program Manager 9115 Hague Road Indianapolis, Indiana 46250
Re: K221693
Trade/Device Name: Elecsys Anti-HCV II (08837031190) Regulation Number: 21 CFR 866.3169 Regulation Name: Hepatitis C Virus Antibody Tests Regulatory Class: Class II Product Code: MZO Dated: June 9, 2022 Received: June 10, 2022
Dear Bin Sun:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part
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801 and Part 809); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Maria Garcia, Ph.D. Assistant Director Division of Microbiology Devices OHT7: Office of In Vitro Diagnostics and Radiological Health Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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Indications for Use
Submission Number (if known)
Device Name
Elecsys Anti-HCV II (08837031190)
Indications for Use (Describe)
lmmunoassay for the in vitro qualitative detection of antibodies to hepatitis C virus (HCV) in human adult and pediatric (ages 18 months through 21 years) serum and plasma (potassium EDTA, lithium heparin, sodium heparin, and sodium citrate). Assay results, in conjunction with other laboratory results and clinical information, may be used to aid in the presumptive diagnosis of HCV infection in persons with signs and symptoms of hepatitis and in persons at risk for hepatitis C infection. The test does not determine the state of infection or associated disease.
The electrochemiluminescence immunoassay "ECLIA" is intended for use on cobas e immunoassay analyzers.
Type of Use (Select one or both, as applicable)
Prescription Use (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (21 CFR 801 Subpart C)
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510(k) Summary
Prepared on: 2022-06-09
Contact Details
21 CFR 807.92(a)(1)
| Applicant Name | Roche Diagnostics |
|---|---|
| Applicant Address | 9115 Hague Road Indianapolis IN 46250 United States |
| Applicant Contact Telephone | 317-292-3781 |
| Applicant Contact | Mr. Bin Sun |
| Applicant Contact Email | bin.sun.bs2@roche.com |
Device Name
21 CFR 807.92(a)(2)
| Device Trade Name | Elecsys Anti-HCV II (08837031190) |
|---|---|
| Common Name | Hepatitis C virus antibody tests |
| Classification Name | Assay, Enzyme Linked Immunosorbent, Hepatitis C Virus |
| Regulation Number | 866.3169 |
| Product Code | MZO |
Legally Marketed Predicate Devices
21 CFR 807.92(a)(3)
| Predicate # | Predicate Trade Name (Primary Predicate is listed first) | Product Code |
|---|---|---|
| P140021 | Elecsys Anti-HCV II Immunoassay | MZO |
Device Description Summary 21 CFR 807.92(a)(4)
Immunoassay for the in vitro qualitative detection of antibodies to hepatitis C virus (HCV) in human adult and pediatric (ages 18 months through 21 years) serum and plasma (potassium EDTA, lithium heparin, sodium heparin, and sodium citrate). Assay results, in conjunction with other laboratory results and clinical information, may be used to aid in the presumptive diagnosis of HCV infection in persons with signs and symptoms of hepatitis and in persons at risk for hepatitis C infection. The test does not determine the state of infection or associated disease.
The electrochemiluminescence immunoassay "ECLIA" is intended for use on cobas e immunoassay analyzers.
The Elecsys Anti-HCV II Immunoassay employs "ECLIA" technology and is a qualitative serologic, two step sandwich assay. The assay detects total antibodies to HCV in serum and plasma samples. The total duration of the assay is 18 minutes. The basic device methodology is as follows:
- 1st incubation: 50 µL of sample, 55 µL of a reagent containing biotinylated HCV antigens, and 55 µL of a reagent containing HCV antigens labeled with a ruthenium complex react to form a sandwich complex.
- 2nd incubation: After addition of streptavidin-coated microparticles, the complex becomes bound to the solid phase via interaction of biotin and streptavidin.
- The reaction mixture is aspirated into the measuring cell where the microparticles are magnetically captured onto the surface of the electrode. Unbound substances are then removed with ProCell. Application of a voltage to the electrode then induces chemiluminescent emission, which is measured by a photomultiplier.
- Results are determined automatically by the Elecsys software by comparing the electrochemiluminescence signal obtained from the sample with the cut-off value obtained by the anti-HCV calibration.
Intended Use/Indications for Use 21 CFR 807.92(a)(5)lmmunoassay for the in vitro qualitative detection of antibodies to hepatitis C virus (HCV) in human adult and pediatric (ages 18 months
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through 21 years) serum and plasma (potassium EDTA, lithium heparin,
sodium heparin, and sodium citrate). Assay results, in conjunction with other laboratory results and clinical information, may be used to aid in the presumptive diagnosis of HCV infection in persons with signs and
symptoms of hepatitis and in persons at risk for hepatitis C infection. The test does not determine the state of infection or associated disease.
The electrochemiluminescence immunoassay "ECLIA" is intended for use on cobas e immunoassay analyzers.
Indications for Use Comparison
Elecsys Anti-HCV II (updated assay, Mat. No. 08837031190) is substantially equivalent to Elecsys Anti-HCV II, approved under P14021.
The intended use of Elecsys Anti-HCV II was updated to remove analyzers that are no longer supported for use with Roche assays. The indications for use of updated Elecsys Anti-HCV II assay did not change from the predicate device.
Technological Comparison
Roche Diagnostics has updated the current Elecsys Anti-HCV II assay in order to improve the biotin tolerance from ≤ 44 ng/mL to ≤ 1200 ng/mL and to reduce streptavidin interference. A technical solution was implemented by adding an the reagents, which allows depletion of biotin in patient samples by binding a streptavidin interference reducing agent to enhance the streptavidin tolerance. No other technological characteristics were changed. The information submitted in this Premarket Notification supports a substantial equivalent decision.
Non-Clinical and/or Clinical Tests Summary & Conclusions
1. Precision
The precision of the Elecsys Anti-HCV II assay was evaluated on one cobas e 601 immunoassay analyzer with one reagent lot. The protocol consisted of testing 2 aliquots of each of controls and 5 human serum samples per run, 2 runs per day for 12 days. The samples were run in randomized order on the analyzer. Repeatability and Intermediate imprecision were calculated according to CLSI EP05-A3 including the 95% confidence interval. All predefined acceptance criteria was met for the precision experiments.
2. Biotin Interference
The effect on measuring of analyte in the presence of biotin using the Elecsys Anti-HCV I assay was determined using three serum samples (negative, low positive and moderate positive) with three lots according to CLSI EP07-A3 Appendix A.
Unique negative serum was used for negative and moderate positive samples were each prepared from unique negative serum spiked with unique anti-HCV positive serum. Samples were divided, and one part of each sample was spiked with the interfering endogenous substance and used as the "interference pool." Another part of the same volume of solvent as the interfering endogenous substance (without interfering substance) and used as the related "dilution pool." A series of 17 dilution steps were prepared by mixing the interference pools and the related dilution pools.
The mean recovery (absolute deviation or percent recovery) was calculated for each sample compared to the expected value. No biotin interference was observed up to 2520 ng/mL. The biotin claim in the method sheet will be set to 1200 ng/mL.
3. Method Comparison to Predicate
A method comparison study was performed to demonstrate equivalency between the performance of the current Elecsys Anti-HCV II assay and the biotin-updated Elecsys Anti-HCV II assay on one cobas e 601 analyzer.
A total of 219 samples were measured with one reagent lot of the current Elecsys Anti-HCV II assay and three different reagent lots of the biotin-updated Elecsys Anti-HCV II assay in single determination on the cobas e 601 analyzer. Results are presented in a 3x3 table. Positive Agreement and Negative Agreen the current and updated assay were calculated. The resulting data support the equivalence of the current non-biotin and biotin-updated assay.
4. Stability
The stability studies and acceptance criteria have been reviewed and found to be acceptable. The stability data supports Roche Diagnostic's claims as reported in the package labeling.
On-board reagent stability for the Elecsys Anti-HCV II assay was tested on one cobas e 601 analyzer. Elecsys Anti-HCV II reagent kits can be stored on-board the analyzers for up to 31 days.
Lot calibration frequency for the Elecsys Anti-HCV II was tested on one cobas e 601 analyzer. The study confirm calibration stability of one month (28 days) with multiple kits from the same reagent lot. Calibrations of an Elecsys Anti-HCV I reagent lot is recommended every 4 weeks when using the same reagent lot.
Real-time stability was tested on one cobas e 601 analyzer. Data supporting a shelf-life of 12 months.
Not Applicable
21 CFR 807.92(a)(5)
21 CFR 807.92(a)(6)
21 CFR 807.92(b)
N/A