(64 days)
To determine bacterial antimicrobial agent susceptibility. The MicroScan® MICroSTREP plus™ Panel is used to determine quantitative and/or qualitative antimicrobial agent susceptibility of colonies grown on solid media of aerobic streptococci, including Streptococcus pneumoniae. After inoculation, panels are incubated for 20 - 24 hours at 35°C +/- 1°C in a non-CO2 incubator, and read visually according to the Package Insert. This particular submission is for the addition of the antimicrobial Erythromycin at concentrations of 0.015 to 2 mcg/ml to the test panel. The organisms which may be used for Erythromycin susceptibility testing in this panel are: Streptococcus pneumoniae, Streptococcus pyogenes, viridans group streptococci.
The MicroScan® MICroSTREP plus™ Panel is used to determine quantitative and/or qualitative antimicrobial agent susceptibility of colonies grown on solid media of aerobic streptococci, including Streptococcus pneumoniae. After inoculation, panels are incubated for 20 - 24 hours at 35°C +/- 1°C in a non-CO2 incubator, and read visually according to the Package Insert. The antimicrobial susceptibility tests are miniaturizations of the broth dilution susceptibility test. Various antimicrobial agents are diluted in water. buffer or minute concentrations of broth to concentrations bridging the range of clinical interest. Panels are rehydrated with 115 ul Mueller-Hinton broth supplemented with 2-5% brsed horse blood (LHB) and buffered with 50 mM HEPES, after inoculation of the broth with a standardized suspension of the organism in saline. After incubation in a non-COincubator for 20-24 hours, the minimum inhibitory concentration (MIC) for the test organism is manually read by observing the lowest antimicrobial concentration showing inhibition of growth.
Here's a summary of the acceptance criteria and the study that proves the device meets them, based on the provided text:
Device: MicroScan® MICroSTREP plus™ Panel with Erythromycin
1. Table of Acceptance Criteria and Reported Device Performance
| Acceptance Criteria | Reported Device Performance |
|---|---|
| Overall Essential Agreement with NCCLS frozen Reference panel for Erythromycin | 94.5% Essential Agreement |
| Acceptable Reproducibility and Precision with Erythromycin | Demonstrated acceptable reproducibility and precision |
| Acceptable Quality Control results for Erythromycin | Demonstrated acceptable results |
2. Sample Size Used for the Test Set and Data Provenance
- Sample Size: The text states "Efficacy isolates" and "Challenge strains" were used, but does not provide specific numbers for the test set.
- Data Provenance: The external evaluation was conducted using "fresh and stock Efficacy isolates and stock Challenge strains." The country of origin is not specified, but the evaluation was external. The study was conducted on already isolated and characterized strains, indicating a retrospective nature for the "stock" strains, and potentially prospective collection for "fresh" isolates.
3. Number of Experts Used to Establish Ground Truth for the Test Set and Qualifications
The document does not specify the number of experts or their qualifications for establishing the ground truth. It refers to an "NCCLS frozen Reference Panel" as the comparator, implying that the reference method itself serves as the ground truth, rather than expert consensus on individual test cases.
4. Adjudication Method for the Test Set
The document does not describe an adjudication method involving multiple readers. The comparison was made against an "NCCLS frozen Reference Panel," which implies a direct comparison of results from the device to the reference standard, not a human reader adjudication process.
5. Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study
No, a multi-reader multi-case (MRMC) comparative effectiveness study was not explicitly mentioned or described. The study focuses on the standalone performance of the device against a reference method, not on the improvement of human readers with AI assistance.
6. Standalone (Algorithm Only Without Human-in-the-Loop Performance) Study
Yes, a standalone study was performed. The device, the MicroScan® MICroSTREP plus™ Panel, is intended to be read visually by a human, but the performance comparison outlined (Essential Agreement against an NCCLS frozen Reference panel) is evaluating the inherent accuracy of the device's determination of MIC, not the human interpretation of the device's output or any AI assistance for visual reading. The context refers to the device and its output, which is then read by a person according to a package insert. The "algorithm" in this case is the chemical and biological reaction within the panel that produces the visible growth inhibition, and its performance is evaluated in a standalone manner against the reference.
7. Type of Ground Truth Used
The ground truth used was the results obtained from an NCCLS frozen Reference Panel. This is a recognized standard method for antimicrobial susceptibility testing.
8. Sample Size for the Training Set
The document does not explicitly mention a separate "training set" or its sample size. The description focuses on an "external evaluation" against a reference panel. Given that this is a chemical/biological test panel rather than an AI/machine learning algorithm that requires explicit training, the concept of a "training set" in the common sense (e.g., for model development) is not applicable here. The assay development itself would have involved extensive optimization, but this wouldn't be referred to as a "training set" in this context.
9. How the Ground Truth for the Training Set Was Established
As noted in point 8, a "training set" in the conventional sense is not applicable. The device's performance is inherently tied to its design and manufacturing. The "ground truth" for the performance evaluation was established by a recognized standard: the NCCLS frozen Reference Panel.
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6 2002 JUN
510(k) Summary Information:
| Device Manufacturer: | Dade MicroScan Inc. |
|---|---|
| Contact name: | Cynthia Van Duker, Regulatory Affairs Manager |
| Fax: | 916-374-3144 |
| Date prepared: | March 29, 2002 |
| Product Name: | Microdilution Minimum Inhibitory Concentration (MIC) Panels |
| Trade Name: | MicroScan® MICroSTREP plusTM Panel |
| Intended Use: | To determine bacterial susceptibility to Erythromycin |
| Indication for Use | For determining antimicrobic susceptibility with aerobic streptococci, includingStreptococcus pneumoniae |
| Predicate device: | MicroScan® Streptococcus MIC Panel (K963641) |
510(k) Summary:
The MicroScan® MICroSTREP plus™ Panel is used to determine quantitative and/or qualitative antimicrobial agent susceptibility of colonies grown on solid media of aerobic streptococci, including Streptococcus pneumoniae. After inoculation, panels are incubated for 20 - 24 hours at 35°C +/- 1°C in a non-CO2 incubator, and read visually according to the Package Insert.
The antimicrobial susceptibility tests are miniaturizations of the broth dilution susceptibility test. Various antimicrobial agents are diluted in water. buffer or minute concentrations of broth to concentrations bridging the range of clinical interest. Panels are rehydrated with 115 ul Mueller-Hinton broth supplemented with 2-5% brsed horse blood (LHB) and buffered with 50 mM HEPES, after inoculation of the broth with a standardized suspension of the organism in saline. After incubation in a non-COincubator for 20-24 hours, the minimum inhibitory concentration (MIC) for the test organism is manually read by observing the lowest antimicrobial concentration showing inhibition of growth.
The proposed MicroScan® MICroSTREP plus™ Panel demonstrated substantially equivalent performance with streptococcal isolates when compared with an NCCLS frozen Reference Panel, as defined in the FDA DRAFT document "Guidance on Review Criteria for Assessment of Antimicrobial Susceptibility Devices", dated March 8, 2000.
The Premarket Notification (510fk]) presents data in support of the new MICroSTREP plus™ Panel with Erythromycin.
The external evaluation was conducted with fresh and stock Efficacy isolates and stock Challenge strains. The external evaluations were designed to confirm the acceptability of the proposed MICroSTREP plus™ Panel by comparing its performance with an NCCLS frozen Reference panel. The MCroSTREP plus™ Panel demonstrated acceptable performance with an overall Essential Agreement of 94.5% for Erythromycin when compared with the frozen Reference panel.
Reproducibility testing demonstrated acceptable reproducibility and precision with Ervihromycin.
Quality Control testing demonstrated acceptable results for Erythromycin.
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DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/1/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo features a stylized eagle or bird design with three human profiles incorporated into its body. The words "DEPARTMENT OF HEALTH & HUMAN SERVICES USA" are arranged in a circular pattern around the bird symbol.
Food and Drug Administration 2098 Gaither Road Rockville MD 20850
JUN 6 2002
Ms. Cynthia Van Duker Regulatory Affairs Manager Dade Behring Inc. 1584 Enterprise Boulevard West Sacramento, CA 95691
Re: K021078
Trade/Device Name: MicroScan® MICroSTREP plus™ Panels Antimicrobial agent: Erythromycin 0.15-2μg/ml Regulation Number: 21 CFR 866.1640 Regulation Name: Antimicrobial Susceptibility Test System Regulatory Class: Class II Product Code: LTT Dated: March 29, 2002 Received: April 3, 2002
Dear Ms. Van Duker:
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. 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.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such 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 801); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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Page 2 - .
This letter will allow you to begin marketing your device as described in your 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed . predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801 and ' additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4588. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its internet address "http://www.fda.gov/cdrh/dsma/dsmamain.html".
Sincerely yours,
Steven Butman
Steven I. Gutman, M.D., M.B.A. Director Division of Clinical Laboratory Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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Indication for Use Statement
KO21078 510(k) No .: (To be assigned by FDA) MicroScan® MICroSTREP plus™ Panel Device Name: To determine bacterial antimicrobial agent susceptibility Intended Use The MicroScan® MICroSTREP plus™ Panel is used to determine Indications for Use: quantitative and/or qualitative antimicrobial agent susceptibility of colonies grown on solid media of aerobic streptococci, including Streptococcus pneumoniae. After inoculation, panels are incubated for 20 - 24 hours at 35°C +/- 1°C in a non-CO2 incubator, and read visually according to the Package Insert. This particular submission is for the addition of the antimicrobial Erythromycin at concentrations of 0.015 to 2 mcg/ml to the test panel The organisms which may be used for Erythromycin susceptibility testing in this panel are: Streptococcus pneumoniae Streptococcus pyogenes viridans group streptococci
PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Freddi M. Poole
(Division Sign-Off)
Division of Clinical Laboratory Devices
| 510(k) Number | K021078 |
|---|---|
| --------------- | --------- |
| Prescription Use | OR | Over-The-Counter Use | ||
|---|---|---|---|---|
| (Per 21 CFR 801.109) | (Optional Format 1-2-96) |
§ 866.1640 Antimicrobial susceptibility test powder.
(a)
Identification. An antimicrobial susceptibility test powder is a device that consists of an antimicrobial drug powder packaged in vials in specified amounts and intended for use in clinical laboratories for determining in vitro susceptibility of bacterial pathogens to these therapeutic agents. Test results are used to determine the antimicrobial agent of choice in the treatment of bacterial diseases.(b)
Classification. Class II (performance standards).