Sensititre 18-24 hour MIC or Breakpoint Susceptibility System with Cefiderocol in the dilution range of 0.03-64 ug/ml

K203741 · Thermo Fisher Scientific · JWY · Dec 20, 2021 · Microbiology

Device Facts

• Record ID: K203741
• Device Name: Sensititre 18-24 hour MIC or Breakpoint Susceptibility System with Cefiderocol in the dilution range of 0.03-64 ug/ml
• Applicant: Thermo Fisher Scientific
• Product Code: JWY · Microbiology
• Decision Date: Dec 20, 2021
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 866.1640
• Device Class: Class 2

Intended Use

The Sensititre 18-24 hour MIC or Breakpoint Susceptibility System is an in vitro diagnostic product for clinical susceptibility testing of non-fastidious isolates. This 510(k) is for Cefiderocol in the dilution range of 0.03-64 ug/mL for testing non-fastidious gram negative organisms on the Sensititre 18-24 hour MIC panel. Cefiderocol has been shown to be active both clinically and in vitro against the following organisms according to the FDA drug label: Escherichia coli, Enterobacter cloacae complex, Klebsiella pneumoniae, Proteus mirabilis, Pseudomonas aeruginosa, Acinetobacter baumannii, Serratia marcescens.

Device Story

System performs in vitro antimicrobial susceptibility testing (AST) for non-fastidious gram-negative bacteria. Uses miniaturized broth microdilution method in multi-well microtiter plates containing dried stabilized Cefiderocol (0.03–64 µg/mL). Organism suspension prepared in cation-adjusted Mueller-Hinton broth; inoculated via AutoInoculator/AIM; incubated 18-24 hours at 34-36°C. Growth detected via visual inspection (Vizion reader) or automated fluorescence monitoring (ARIS/Autoreader/OptiRead). Fluorescence generated by bacterial surface enzymes cleaving fluorogenic substrate. Results provide quantitative MIC values. Used in clinical microbiology laboratories to guide antibiotic therapy decisions. Limitations include retesting requirements for A. baumannii (1 µg/mL) due to Vizion read errors and unknown resistance detection for certain species.

Clinical Evidence

Bench testing only. The device performance was evaluated through comparative studies against reference methods to establish MIC agreement and essential agreement for Cefiderocol.

Technological Characteristics

Multi-well microtiter plates with dried stabilized Cefiderocol. Fluorescence-based detection of bacterial surface enzyme activity. Incubation 34-36°C. Automated inoculation (AIM) and reading (ARIS/Autoreader/OptiRead) or visual (Vizion). Media: Cation-adjusted Mueller-Hinton broth with TES buffer. Connectivity: Standalone instrument integration.

Indications for Use

Indicated for clinical susceptibility testing of non-fastidious gram-negative isolates (E. coli, E. cloacae complex, K. pneumoniae, P. mirabilis, P. aeruginosa, A. baumannii, S. marcescens) to Cefiderocol. Rx only.

Regulatory Classification

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.

Predicate Devices

• Sensititre 18-24 hour MIC or Breakpoint Susceptibility System with Cefiderocol in the dilution range of 0.03-64 µg/ml (K193538)

Submission Summary (Full Text)

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December 20, 2021

Thermo Fisher Scientific Cynthia Knapp Director of AST/PHARMA R&D 1 Thermo Fisher Way Oakwood Village, Ohio 44014-6

Re: K203741

Trade/Device Name: Sensititre 18-24 hour MIC or Breakpoint Susceptibility System with Cefiderocol in the dilution range of 0.03-64 ug/ml Regulation Number: 21 CFR 866.1640 Regulation Name: Antimicrobial Susceptibility Test Powder Regulatory Class: Class II Product Code: JWY, LRG, LTT Dated: December 18, 2020 Received: December 22, 2020

Dear Cynthia Knapp:

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

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requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 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 (OS) 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 ([e-mail]) or phone [phone] or 301-796-7100).

Sincerely,

Ribhi Shawar, Ph.D. (ABMM) Chief General Bacteriology and Antimicrobial Susceptibility Branch 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

510(k) Number (if known)

Device Name

Indications for Use (Describe)

| 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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