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510(k) Data Aggregation

    K Number
    K983541
    Date Cleared
    1999-02-26

    (140 days)

    Product Code
    Regulation Number
    866.3305
    Reference & Predicate Devices
    N/A
    Why did this record match?
    Applicant Name (Manufacturer) :

    GULL LABORATORIES, INC.

    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use

    The HSV 1+2 IgG ELISA TEST is to be used manually or in conjunction with the Duet™ instrument in the testing of human serum specimens from individuals in whom the qualitative presence or absence of detectable IgG antibody to herpes simplex virus type 1 and type 2 is warranted in the determination of immunological experience pertaining to infection with herpes simplex virus type 1 and type 2 and as an aid in the diagnosis of herpes simplex virus associated disease.

    Device Description

    The HSV 1+2 IgG ELISA Test is an in vitro diagnostic medical device intended for the qualitative detection of IgG antibody to the herpes simplex virus (HSV) in human serum by the enzyme-linked immunosorbent assay (ELISA) method. The HSV 1+2 IgG ELISA Test is comprised of the following items: Antigen-Coated ELISA Plate, IgG Specimen Diluent, Conjugate, Substrate Buffer, p-NPP Tablets, Stopping Reagent, Positive Control and Negative Control, Reference Serum, 20X Wash Solution, ELISA Plate Sealer, Resealable Storage Bag, and ELISA Worksheet. When the HSV 1+2 IgG ELISA Test is employed, diluted patient serum is incubated with partially purified HSV antigen bound to the ELISA plate wells. If antibodies to herpes simplex virus are present, they bind to the antigen and do not rinse off. Subsequently when enzyme-labeled antihuman IgG is added to the reaction site it binds to the immobilized IgG antibodies. After washing and the addition of a chromogenic substrate and stopping reagent, specimens containing antibodies to herpes simplex virus produce a color endpoint reaction which can be read with a standard ELISA plate reader.

    AI/ML Overview

    Here's a breakdown of the acceptance criteria and the study that proves the device meets them, based on the provided text:

    1. Table of Acceptance Criteria and Reported Device Performance

    Performance MetricAcceptance Criteria (Implicit)Reported Device Performance (Comparative Study)Reported Device Performance (CDC Panel Study - Site 1 & 2)Reported Device Performance (CDC Panel Study - Site 3/Gull Labs)
    Relative Agreement with PredicateHigh agreement96.7% (95% CI: 92.5% to 98.9%)N/AN/A
    Relative Sensitivity with PredicateHigh sensitivity99.1% (95% CI: 95.2% to 100.0%)N/AN/A
    Relative Specificity with PredicateHigh specificity90.0% (95% CI: 75.3% to 97.2%)N/AN/A
    Total Agreement with CDC Ground TruthHigh agreementN/A96.0% (96/100)95.0% (95/100)
    Agreement for Positive Specimens (CDC Ground Truth)High agreement (positive predictive value)N/A100% (72/72)100% (72/72)
    Agreement for Negative Specimens (CDC Ground Truth)High agreement (negative predictive value)N/A85.7% (24/28)82.1% (23/28)

    Note on Acceptance Criteria: The document primarily focuses on demonstrating "substantial equivalence" rather than explicit, pre-defined numerical acceptance criteria for absolute performance. The implied acceptance criteria are a high level of agreement, sensitivity, and specificity when compared to a legally marketed predicate device (HERPELISA II Test Kit) and a characterized serum panel from the CDC.

    2. Sample Size Used for the Test Set and Data Provenance

    • Comparative Study (vs. Predicate Device):

      • Sample Size: 154 donors
      • Data Provenance: The study was conducted at Gull Laboratories, Inc. The country of origin for the samples is not explicitly stated but is implied to be within the US, given the company's location. The study is prospective in the sense that the new device was evaluated against existing samples, but the samples themselves could be either prospectively collected for this study or retrospectively gathered from a bank. The text "Blood samples from 154 donors were evaluated" suggests a specific collection for this comparison.
    • CDC Serum Panel Study:

      • Sample Size: 100 frozen clinical specimens (50 paired sera)
      • Data Provenance: The serum panel was obtained from the Centers for Disease Control (CDC). These were "characterized" specimens, indicating their properties were already known. The testing was conducted at three sites in the U.S.: a hospital in the Northeastern region, a clinical laboratory in the Northwestern region, and Gull Laboratories, Inc. This is a retrospective evaluation using a pre-characterized panel. The country of origin for the data is the USA.

    3. Number of Experts Used to Establish the Ground Truth for the Test Set and Qualifications of Those Experts

    • Comparative Study (vs. Predicate Device):

      • The ground truth was established by the HERPELISA II Test Kit, which is a legally marketed predicate device. This isn't based on human expert consensus for this specific study, but rather on the established performance of the predicate device.
    • CDC Serum Panel Study:

      • The serum panel was "characterized at the CDC using both an enzyme immunoassay (EIA) and an in-house Western Blot method for HSV type specific antibody detection." While not explicitly stated as "experts," the CDC's characterization methods imply the involvement of highly qualified personnel with expertise in virology and serological testing. The number of individuals involved in the CDC's ground truth establishment is not specified.

    4. Adjudication Method for the Test Set

    • Comparative Study (vs. Predicate Device): Not applicable. The comparison was directly between the new device and the predicate device. Equivocal results were excluded from calculations, implying a binary (positive/negative) comparison.

    • CDC Serum Panel Study:

      • The "ground truth" was already established by the CDC using EIA and Western Blot. The results from the three testing sites were then compared to this pre-established truth.
      • For the device's own internal consistency: "All three sites produced the same qualitative results for all but one sample which gave negative results at the hospital... and the clinical laboratory... but equivocal results at Gull Laboratories, Inc." This indicates a comparison across sites, but no formal adjudication process to resolve discrepancies other than noting the difference.

    5. If a Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study was Done

    No, a Multi-Reader Multi-Case (MRMC) comparative effectiveness study was not done. The device is an in vitro diagnostic (IVD) ELISA test, which is an automated or semi-automated laboratory assay, not an imaging device or AI algorithm requiring human reader interpretation in the same way. Therefore, the concept of "human readers improve with AI vs without AI assistance" does not apply here.

    6. If a Standalone (i.e., algorithm only without human-in-the-loop performance) was Done

    Yes, the performance studies described are essentially standalone evaluations of the device (the HSV 1+2 IgG ELISA Test). While human technicians perform the assay, the "performance" metrics (agreement, sensitivity, specificity) reflect the device's ability to correctly classify samples based on its biochemical reactions, independent of human interpretive influence on the result itself (beyond correct assay execution).

    7. The Type of Ground Truth Used

    • Comparative Study (vs. Predicate Device): The ground truth was the results from a legally marketed predicate device (HERPELISA II Test Kit). This is a form of "reference standard" from another diagnostic test.
    • CDC Serum Panel Study: The ground truth was established by expert-characterized reference methods (EIA and in-house Western Blot) from the CDC. This leans towards a form of "expert consensus/reference method" ground truth.

    8. The Sample Size for the Training Set

    The document does not mention a training set. This is a characteristic of traditional IVD devices like ELISAs, which are developed based on biochemical principles and validation rather than machine learning algorithms that require explicit training data.

    9. How the Ground Truth for the Training Set Was Established

    Not applicable, as no training set is mentioned for this type of device.

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    K Number
    K971857
    Date Cleared
    1997-11-04

    (168 days)

    Product Code
    Regulation Number
    866.3380
    Reference & Predicate Devices
    Why did this record match?
    Applicant Name (Manufacturer) :

    GULL LABORATORIES, INC.

    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use

    The MUMPS IgG ELISA TEST is to be used in the testing of human serum specimens from asymptomatic and symptomatic children and adults for whom quantitation of the presence or the qualitative presence or absence of detectable IgG antibody to mumps virus is warranted in the determination of immunological experience pertaining to infection with mumps virus and as an aid in the diagnosis of mumps infection.

    Device Description

    The Mumps IgG ELISA Test is an in vitro diagnostic medical device intended for the qualitative and semi-quantitative detection of IgG antibody to the mumps virus in human serum by the enzyme-linked immunosorbent assay (ELISA) method. The Mumps IgG ELISA Test is comprised of the following items: Mumps Antigen-Coated ELISA Plate; IgG Specimen Diluent; Conjugate; Substrate Buffer; p-NPP Tablets; Stopping Reagent; Calibrator 1 and 2; Positive Control and Negative Control; Reference Serum; 20X Wash Solution; ELISA Plate Sealer; Resealable Storage Bag; ELISA Worksheet; Activity Units Graph Paper. When the Mumps IgG ELISA Test is employed, diluted patient serum is incubated with purified mumps virus antigen bound to the ELISA plate wells. If antibodies to the mumps virus are present, they bind to the antigen and do not rinse off. Subsequently when enzyme-labeled antihuman IgG is added to the reaction site it binds to the immobilized IgG antibodies. After washing and the addition of a chromogenic substrate and stopping reagent, specimens containing antibodies to the mumps virus produce a color endpoint reaction which can be read with a standard ELISA plate reader.

    AI/ML Overview

    I am sorry, but the provided text does not contain typical acceptance criteria and reported device performance in a structured format suitable for direct extraction into the requested table. The document describes a 510(k) submission for an in vitro diagnostic medical device (Mumps IgG ELISA Test) and focuses on demonstrating substantial equivalence to a predicate device.

    Instead of explicit acceptance criteria, the document presents results from comparative studies against a predicate device, focusing on agreement, relative sensitivity, and relative specificity. These are measures of how well the new device performs compared to an existing, approved device, rather than against predefined absolute clinical performance benchmarks.

    Therefore, I cannot generate the table as requested with "Acceptance Criteria" and "Reported Device Performance" in the traditional sense of a clinical trial's primary and secondary endpoints.

    However, I can extract the performance data presented in the document by comparing the Mumps IgG ELISA Test to the Mumps Stat Test Kit (predicate device).

    Here is the information extracted from the document based on your request, formatted to the best of my ability given the content:


    Device Performance Information: Mumps IgG ELISA Test

    The document describes several studies comparing the Mumps IgG ELISA Test to its predicate device, the Mumps Stat Test Kit. The performance is reported in terms of agreement, relative sensitivity, and relative specificity when compared to the predicate device.

    1. Table of Acceptance Criteria and Reported Device Performance

    As noted above, explicitly defined "acceptance criteria" for the Mumps IgG ELISA Test were not provided in the document. The studies aimed to demonstrate "substantial equivalence" to the predicate device. The reported performance metrics are presented below:

    Performance Metric (vs. Mumps Stat Test Kit)Blood Bank Study (N=144)Hospital Study (Northeastern region) (N=123)Hospital Study (Southwestern region) (N=123)
    Overall Agreement97.9% (139/142)96.6% (114/117)93.2% (109/117)
    Relative Sensitivity (95% CI)97.5% (119/122) (93.0% - 99.5%)98.0% (96/98) (92.8% - 99.8%)94.3% (99/110) (88.0% - 97.9%)
    Relative Specificity (95% CI)100% (20/20) (83.2% - 100%)94.7% (18/19) (74.0% - 99.9%)83.3% (10/13) (51.6% - 97.9%)
    Excluded Equivocal Samples2 samples6 samples6 samples

    Note: The reported performance is relative to the predicate device, not an absolute measure against a true gold standard. The 95% Confidence Intervals (CI) were determined by the Exact Method.

    2. Sample Size and Data Provenance for Test Set

    • Sample Sizes:
      • Study 1 (Blood Bank): 144 donors. After excluding 2 equivocal samples, 142 samples were used for calculations (e.g., 122 positive and 20 negative for relative sensitivity/specificity).
      • Study 2 (Hospital, Northeastern region): 123 patient specimens. After excluding 6 equivocal samples, 117 samples were used for calculations (e.g., 98 positive and 19 negative for relative sensitivity/specificity).
      • Study 3 (Hospital, Southwestern region): 123 patient specimens. After excluding 6 equivocal samples, 117 samples were used for calculations (e.g., 110 positive and 13 negative for relative sensitivity/specificity).
    • Data Provenance:
      • Study 1: Blood samples from a regional blood bank. Location not specified, but the submitter (Gull Laboratories, Inc.) is based in Salt Lake City, Utah, USA.
      • Study 2: Clinical specimens from a hospital in the Northeastern region of the United States.
      • Study 3: Clinical specimens from a hospital in the Southwestern region of the United States.
    • Retrospective/Prospective: Not explicitly stated, but the description "Blood samples from 144 donors were evaluated" and "Clinical specimens from 123 patients were tested" suggests these were retrospective analyses of collected samples.

    3. Number of Experts and Qualifications for Ground Truth

    • Ground Truth Establishment: The ground truth for the test sets was established by comparing the results of the Mumps IgG ELISA Test directly against a predicate device, the "Mumps Stat Test Kit". This is a comparative study, not one where an independent "expert ground truth" was established.
    • Number/Qualifications of Experts: The document does not mention the involvement of independent experts to establish a "ground truth" for the test set. The predicate device itself served as the reference standard for comparison.

    4. Adjudication Method for the Test Set

    • Adjudication Method: "Discordant samples were retested using the same two tests." This implies a re-testing mechanism for cases where the Mumps IgG ELISA Test and the Mumps Stat Test Kit initially disagreed. However, the reported results ("Without incorporating the results of retesting the discordant samples") do not include these retest results in the primary statistical calculations for agreement, sensitivity, and specificity. This means the initial read was used for the primary statistics. The document does not specify further adjudication if the retests remained discordant or what criteria were used to resolve discrepancies if the retest results were to be used.

    5. Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study

    • No MRMC Study: This is an in vitro diagnostic test (ELISA). MRMC studies, which involve multiple human readers interpreting cases with and without AI assistance, are not applicable to this type of device. The device itself performs the detection of antibodies.

    6. Standalone (Algorithm Only) Performance

    • Standalone Performance: Yes, the described studies represent the standalone performance of the "Mumps IgG ELISA Test" device. It is an "algorithm only (device only)" performance in the sense that the device delivers a result (qualitative or semi-quantitative detection of IgG antibody) without real-time human intervention in the result generation process itself, beyond standard laboratory procedures for running an ELISA. The comparison is between two such standalone diagnostic tests.

    7. Type of Ground Truth Used

    • Type of Ground Truth: The ground truth was established by comparison to a predicate device (Mumps Stat Test Kit). The predicate device itself serves as the reference for determining relative performance. This is a common approach for demonstrating "substantial equivalence" for in vitro diagnostic devices under 510(k) pathway, rather than comparison to a definitive clinical or pathological gold standard.

    8. Sample Size for the Training Set

    • Training Set Sample Size: The document does not mention a "training set" in the context of developing the Mumps IgG ELISA Test. ELISA tests are typically developed and optimized through laboratory experiments and verification studies using characterized samples, but these are generally not referred to as "training sets" in the same way as machine learning algorithms. The provided text focuses on the performance evaluation of the finalized device.

    9. How Ground Truth for Training Set was Established

    • Not Applicable: As there is no mention of a "training set" in the machine learning sense, the method for establishing its ground truth is not described. The device's components (antigen, controls, etc.) would have been validated through standard analytical performance studies during development, but this is distinct from establishing ground truth for a dataset used to "train" an algorithm.
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    K Number
    K962343
    Date Cleared
    1997-03-24

    (279 days)

    Product Code
    Regulation Number
    866.3780
    Reference & Predicate Devices
    N/A
    Why did this record match?
    Applicant Name (Manufacturer) :

    GULL LABORATORIES, INC.

    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use
    Device Description
    AI/ML Overview
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