(209 days)
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 either visually or with MicroScan® WalkAway instrument.
This particular submission is for the evaluation of antimicrobial agent penicillin on the MicroScan® MICroSTREP plus® Panel utilizing the updated Streptococcus pneumoniae meningitis interpretative criteria (S ≤ 0.06, R ≥ 0.12) and non-meningitis interpretative criteria (S ≤ 2, I = 4, R ≥ 8).
The organisms which may be used for Penicillin susceptibility testing in this panel are:
Streptococcus pneumoniae
Streptococci (Groups A, C, G, H, L and M)
Streptococcus agalactiae
Viridans Streptococci
MicroScan MICroSTREP plus® Panels are designed for use in determining quantitative and/or qualitative antimicrobial agent susceptibility of colonies grown on solid media of rapidly growing 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 or with the MicroScan WalkAway instrument according to the Package Insert.
The antimicrobial susceptibility tests are miniaturizations of the broth dilution susceptibility test that have been diluted in broth and dehydrated. 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 115ul Mueller-Hinton broth supplemented with 2-5% lysed horse blood (LHB) and buffered with 50 mM HEPES, after inoculation with a standardized suspension of the organism in saline. After incubation in a non-CO2 incubator for 20-24 hours, the minimum inhibitory concentration (MIC) for the test organism is read by determining the lowest antimicrobial concentration showing inhibition of growth.
Here's a breakdown of the acceptance criteria and the study details for the MicroScan® MICroSTREP plus® Panels with Penicillin, based on the provided document:
1. Table of Acceptance Criteria and Reported Device Performance
| Acceptance Criteria | Reported Device Performance (Penicillin) |
|---|---|
| Overall Essential Agreement (EA) with CLSI frozen Reference Panel | 92.5% |
Note: The document only explicitly mentions an "overall Essential Agreement" without stating a minimum threshold. However, this level of detail is typical for 510(k) summaries where the criteria might be implied by relevant guidance documents (e.g., FDA's "Class II Special Controls Guidance Document: Antimicrobial Susceptibility Test (AST) Systems"). The 92.5% Essential Agreement is stated as "acceptable performance."
2. Sample Size Used for the Test Set and Data Provenance
- Sample Size for Test Set: The document refers to "Streptococcus pneumoniae data from the previously cleared Penicillin external evaluations (K062773 and K020626)" and "Challenge strains." However, specific numerical sample sizes for these test sets are not provided in the given text.
- Data Provenance: The document does not explicitly state the country of origin for the data or whether it was retrospective or prospective. It refers to "external evaluations," suggesting that the data likely came from clinical or laboratory studies outside of the direct manufacturing site.
3. Number of Experts Used to Establish the Ground Truth for the Test Set and Their Qualifications
This information is not provided in the document. The ground truth for the test set was established using a "CLSI frozen Reference panel" and "Expected Results determined prior to the evaluations." This implies a standardized laboratory reference method, but not a panel of human experts in the typical clinical sense.
4. Adjudication Method for the Test Set
This information is not applicable or not provided in the document. The comparison was made against a "CLSI frozen Reference panel" and "Expected Results," which are objective laboratory standards, not subjective assessments requiring adjudication by multiple readers.
5. If a Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study Was Done
No, an MRMC comparative effectiveness study involving human readers is not described in this document. The device is for determining antimicrobial susceptibility, which is a quantitative/qualitative laboratory test, not a diagnostic interpretation task that typically involves multiple human readers.
6. If a Standalone (i.e., algorithm only without human-in-the-loop performance) Was Done
Yes, a standalone performance evaluation was done. The MicroScan® MICroSTREP plus® Panel's performance was compared to a "CLSI frozen Reference panel" and "Expected Results." This is an assessment of the device's inherent ability to determine MIC values without direct human intervention in the interpretive phase (though humans operate the device). The device can be read "visually or with the MicroScan WalkAway instrument."
7. The Type of Ground Truth Used
The ground truth used was based on:
* A CLSI frozen Reference panel: This refers to a standardized laboratory reference method (Clinical and Laboratory Standards Institute guidelines) which is considered the gold standard for antimicrobial susceptibility testing.
* Expected Results: These are pre-determined outcomes for the challenge strains, likely established through the CLSI reference method.
8. The Sample Size for the Training Set
The document refers to "previously cleared Penicillin external evaluations (K062773 and K020626)." While these prior submissions would have involved training data or development data, the specific sample size for the training set for this particular modification is not provided in the given text. The current submission focuses on evaluating the updated interpretive criteria on existing data.
9. How the Ground Truth for the Training Set Was Established
Similar to point 8, the specific methodology for establishing ground truth for the training set used in previous submissions (K062773 and K020626) is not detailed in this document. It can be inferred that it would also have followed CLSI guidelines and reference methods, given the nature of the device and the comparison in the current submission.
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K09/949
JAN 2 6 2010
Page 1 of 1
510(k) Summary
510(k) Submission Information:
| Device Manufacturer: | Siemens Healthcare Diagnostics |
|---|---|
| Contact name: | Shannon Popson, Regulatory Affairs Senior Technical Specialist |
| Fax: | 916-374-3330 |
| Date prepared: | June 16, 2009 |
| Product Name: | Microdilution Minimum Inhibitory Concentration (MIC) Panels |
| Trade Name: | MicroScan® MICroSTREP plus® Panels |
| Intended Use: | To determine antimicrobial agent susceptibility |
| 510(k) Notification: | Device Modification – Evaluation of Penicillin (K062773) versusStreptococcus pneumoniae interpretive criteria (meningitis S ≤ 0.06, R ≥ 0.12 and non-meningitis S ≤ 2, I = 4, R ≥ 8). |
| Predicate device: | MicroScan® MICroSTREP plus® Panels |
510(k) Summary:
MicroScan MICroSTREP plus® Panels are designed for use in determining quantitative and/or qualitative antimicrobial agent susceptibility of colonies grown on solid media of rapidly growing 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 or with the MicroScan WalkAway instrument according to the Package Insert.
The antimicrobial susceptibility tests are miniaturizations of the broth dilution susceptibility test that have been diluted in broth and dehydrated. 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 115ul Mueller-Hinton broth supplemented with 2-5% lysed horse blood (LHB) and buffered with 50 mM HEPES, after inoculation with a standardized suspension of the organism in saline. After incubation in a non-CO2 incubator for 20-24 hours, the minimum inhibitory concentration (MIC) for the test organism is read by determining the lowest antimicrobial concentration showing inhibition of growth.
The proposed MicroScan MICroSTREP plus® Panel demonstrated substantially equivalent performance when compared with an CLSI frozen Reference Panel, as defined in the FDA document "Class II Special Controls Guidance Document: Antimicrobial Susceptibility Test (AST) Systems; Guidance for Industry and FDA", dated March 5, 2007.
This Special 510(k) presents data and information in support of updating the penicillin labeling for the updated Streptococcus pneumoniae interpretive criteria (meningitis S ≤ 0.06, R ≥ 0.12 and nonmeningitis S ≤ 2, I = 4, R ≥ 8).
The Streptococcus pneumoniae data from the previously cleared Penicillin external evaluations (K062773 and K020626) were compared to the performance of a CLSI frozen Reference panel utilizing the revised interpretative criteria (meningitis S ≤ 0.06, R ≥ 0.12 and non-meningitis S ≤ 2, I = 4, R > 8). Challenge strains were compared to Expected Results determined prior to the evaluations. The MICroSTREP plus® Panel demonstrated acceptable performance versus the with an overall Essential Agreement of 92.5% for Penicillin when compared with the frozen Reference panel.
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Image /page/1/Picture/0 description: The image shows the seal of the Department of Health & Human Services - USA. The seal is circular, with the words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the top half of the circle. The bottom half of the circle contains a stylized image of an eagle with its wings spread. The eagle is facing to the right.
DEPARTMENT OF HEALTH & HUMAN SERVICES
Public Health Service
Food and Drug Administration 10903 New Hampshire Avenuc Building 66 Silver Spring, MD 20993
JAN 2 6 2010
Shannon Popson Senior Technical Specialist, Regulatory Affairs Siemens Healthcare Diagnostics, Inc. 2040 Enterprise Blvd. West Sacramento, CA 95691
Re: K091949
Trade/Device Name: MicroScan® MICroSTREP plus® Panel Regulation Number: 21 CFR 1640 Regulation Name: Antimicrobial Susceptibility Test Powder Regulatory Class: Class II Product Code: LTT, LRG Dated: January 14, 2010 Received: January 19, 2010
Dear Ms. Popson:
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 class II (Special Controls), it may be subject to such additional controls. Existing major regulations affecting your device can be found in Title 21, Code of Federal Regulations (CFR), Parts 800 to 895. 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
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Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Parts 801 and 809); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); and good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820). This letter will allow you to begin marketing your device as described in your Section 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 Parts 801 and 809), please contact the Office of In Vitro Diagnostic Device Evaluation and Safety at (301) 796-5450. 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
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/cdrl/industry/support/index.html.
Sincerely vours.
Jolgatpus
Sally A. Hojvat, Ph.D. Director, Division of Microbiology Devices Office of In Vitro Diagnostic Device Evaluation and Safety Center for Devices and Radiological Health
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Indication for Use
510(k) Number (if known):
Device Name: MicroScan® MICroSTREP plus® Panels with Penicillin (0.015 - 16 ug/ml)
Indication For Use:
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 either visually or with MicroScan® WalkAway instrument.
This particular submission is for the evaluation of antimicrobial agent penicillin on the MicroScan® MICroSTREP plus® Panel utilizing the updated Streptococcus pneumoniae meningitis interpretative criteria (S ≤ 0.06, R ≥ 0.12) and non-meningitis interpretative criteria (S ≤ 2, I = 4, R ≥ 8).
The organisms which may be used for Penicillin susceptibility testing in this panel are:
Streptococcus pneumoniae Streptococci (Groups A, C, G, H, L and M) Streptococcus agalactiae Viridans Streptococci
Prescription Use ブ (21 CFR Part 801 Subpart D)
And/Or
Over the Counter Use (21 CFR Part 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE; CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of In Vitro Diagnostic Device Evaluation and Safety (OIVD)
fey oot
Division Sign-Of Office of In Vitro Diagnostic Device Evaluation and Safety
510(k) K091949
Page 1 of 2
§ 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).