(137 days)
The Ultraflex Esophageal NG Stent is intended for maintaining esophageal luminal patency in esophageal strictures caused by intrinsic and/or extrinsic malignant tumors only. The Ultraflex Esophageal NG Covered Stent System is also indicated for occlusion of concurrent esophageal fistula.
The WallFlex Esophageal Partially Covered and Fully Covered Stent System is intended for maintaining esophageal luminal patency in esophageal strictures caused by intrinsic malignant tumors, and occlusion of concurrent esophageal fistulas.
The Ultraflex Esophageal NG Stent System allows placement of a self-expanding metallic stent within the esophagus. The systems consist of a flexible delivery system preloaded with an expandable with or without a cover. The WallFlex Esophageal Stent System consists of a self-expanding esophageal metal stent and a delivery system.
The provided text is an FDA 510(k) clearance letter and a 510(k) summary for Boston Scientific's Ultraflex Esophageal NG Stent System and WallFlex Esophageal Stent System. This document explicitly states that the proposed devices are identical to their legally marketed predicate devices in design, material, chemical composition, fundamental technology, principle of operation, sterilization, packaging, shelf-life, and manufacturing process.
Therefore, the submission does not describe a study involving acceptance criteria and device performance based on a test set, expert ground truth, or AI assistance. The clearance is based on the substantial equivalence of the new devices to existing, already cleared devices.
Here's why the requested information cannot be extracted from this document:
- No new performance data is presented. The core argument for clearance is "identity" to predicates, not "improved performance" or meeting specific performance thresholds through new testing against a defined ground truth.
- The document states, "The testing performed on the proposed Ultraflex Esophageal Stent System and WallFlex Esophageal Stent System demonstrates the devices are substantially equivalent." This testing would likely be engineering or bench performance tests (e.g., stent radial force, deployment accuracy, material compatibility) to demonstrate the identity and safety of the new devices, not clinical performance against a diagnostic task or a clinical outcome. These tests are not detailed in the provided summary.
- The context is a 510(k) premarket notification for a Class II device. For such devices, especially those claiming identity to predicates with established performance, a comparative effectiveness study involving human readers with and without AI assistance is generally not required or performed.
- AI/Machine Learning is not mentioned. The document describes physical medical devices (stents), not AI-powered diagnostic or therapeutic tools.
In summary, the provided text does not contain the information requested regarding acceptance criteria, study design (test set, ground truth, experts, adjudication, MRMC, standalone), or training set details because the basis for clearance is substantial equivalence (identity) to existing devices, not a new performance claim for an AI/ML-driven device or a device requiring new clinical performance validation in the way described in your prompt.
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April 29, 2024
Boston Scientific Yanine Garcia-Quezada Principal Regulatory Affairs Specialist 300 Boston Scientific Wav Marlborough, Massachusetts 01752
Re: K233939
Trade/Device Name: Ultraflex Esophageal NG Stent System; WallFlex Esophageal Stent System Regulation Number: 21 CFR 878.3610 Regulation Name: Esophageal Prosthesis Regulatory Class: Class II Product Code: ESW Dated: January 29, 2024 Received: January 30, 2024
Dear Yanine Garcia-Quezada:
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 (the 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 available 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.
Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device" (https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download).
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Your device is also subject to, among other requirements, the Quality System (QS) regulation (21 CFR Part 820), which includes, but is not limited to, 21 CFR 820.30, Design controls; 21 CFR 820.90, Nonconforming product; and 21 CFR 820.100, Corrective and preventive action. Please note that regardless of whether a change requires premarket review. the OS regulation requires device manufacturers to review and approve changes to device design and production (21 CFR 820.30 and 21 CFR 820.70) and document changes and approvals in the device master record (21 CFR 820.181).
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); medical device reporting of medical device-related adverse events) (21 CFR Part 803) for devices or postmarketing safety reporting (21 CFR Part 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 Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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 medical devices and radiation-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).
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Sincerely,
Shanil P. Haugen -S
Shanil P. Haugen, Ph.D. Assistant Director DHT3A: Division of Renal, Gastrointestinal, Obesity and Transplant Devices OHT3: Office of GastroRenal, ObGyn, General Hospital and Urology Devices 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) K233939
Device Name Ultraflex Esophageal NG Stent System WallFlex Esophageal Stent System
Indications for Use (Describe)
The Ultraflex Esophageal NG Stent is intended for maintaining esophageal luminal patency in esophageal strictures caused by intrinsic and/or extrinsic malignant tumors only. The Ultraflex Esophageal NG Covered Stent System is also indicated for occlusion of concurrent esophageal fistula.
The WallFlex Esophageal Partially Covered and Fully Covered Stent System is intended for maintaining esophageal luminal patency in esophageal strictures caused by intrinsic malignant tumors, and occlusion of concurrent esophageal fistulas.
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
21 CFR 807.92(a)(1)
Prepared on: 2023-12-14
Contact Details
21 CFR 807.92(a)(1)
| Applicant Name | Boston Scientific | |
|---|---|---|
| Applicant Address | 300 Boston Scientific Way Marlborough MA 01752 United States | |
| Applicant Contact Telephone | 508-382-0240 | |
| Applicant Contact | Yanine Garcia-Quezada | |
| Applicant Contact Email | yanine.garcia-quezada@bsci.com | |
| Device Name | 21 CFR 807.92(a)(2) | |
| Device Trade Name | Ultraflex™ Esophageal NG Stent SystemWallFlex™ Esophageal Stent System | |
| Common Name | Esophageal prosthesis | |
| Classification Name | Prosthesis, Esophageal | |
| Regulation Number | 878.3610 | |
| Product Code | ESW | |
| Legally Marketed Predicate Devices 21 CFR 807.92(a)(3) | ||
| Predicate # | Predicate Trade Name (Primary Predicate is listed first) | Product Code |
| K130004 | Ultraflex Esophageal NG Stent System | ESW |
| K091510 | WallFlex Esophageal Stent System | ESW |
| Device Description Summary 21 CFR 807.92(a)(4) |
The Ultraflex Esophageal NG Stent System allows placement of a self-expanding metallic stent within the esophagus. The systems consist of a flexible delivery system preloaded with an expandable with or without a cover. The WallFlex Esophageal Stent System consists of a self-expanding esophageal metal stent and a delivery system.
Intended Use/Indications for Use
21 CFR 807.92(a)(5)
The Ultraflex Esophageal NG Stent System is intended for maintaining esophageal strictures caused by intrinsic and/or extrinsic malignant tumors only. The Ultraflex Esophageal NG Covered Stent System is also indicated for occlusion of concurrent esophageal fistula.
The WallFlex Esophageal Partially Covered Stent System is intended for maintaining esophageal luminal patency in esophageal strictures caused by intrinsic and/or extrinsic malignant tumors, and occlusion of concurrent esophageal fistulas.
Indications for Use Comparison
21 CFR 807.92(a)(5)
The indications for use of the proposed Ultraflex™ Esophageal NG Stent System and WallFlex™ Esophageal Stent System devices are identical to their respective predicate devices.
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Technological Comparison
21 CFR 807.92(a)(6)
The proposed Ultraflex Esophageal Stent System and WallFlex Esophageal Stent System devices are identical to the predicate device in design, material, chemical composition, fundamental technology, principle of operation, sterilization, packaging, shelf-life and manufacturing process.
Non-Clinical and/or Clinical Tests Summary & Conclusions 21 CFR 807.92(b)
Boston Scientific Corporation has demonstrated that the proposed Ultraflex Esophageal Stent System and WallFlex Esophageal Stent System are substantially equivalent to the previously cleared and currently marketed predicate Ultraflex Esophageal Stent System (K130004) and WallFlex Esophageal Stent System (K091510), respectively.
The proposed Ultraflex Esophageal Stent System and WallFlex Esophageal Stent System are identical to the predicate Ultraflex Esophageal Stent System (K13004) and WallFlex Esophageal Stent System (K091510) in intended use, indications for use, classification, principles of operation, technical characteristics, performance, and materials. The labeling changes do not raise different questions of safety and effectiveness. The testing performed on the proposed Ultraflex Esophageal Stent System and WallFlex Esophageal Stent System demonstrates the devices are substantially equivalent.
The substantial equivalence of the subject device was determined as per the FDA quidance document, "The 510(k) Program: Evaluating Substantial Equivalence in Premarket Notifications [510(k)]."
§ 878.3610 Esophageal prosthesis.
(a)
Identification. An esophageal prosthesis is a rigid, flexible, or expandable tubular device made of a plastic, metal, or polymeric material that is intended to be implanted to restore the structure and/or function of the esophagus. The metal esophageal prosthesis may be uncovered or covered with a polymeric material. This device may also include a device delivery system.(b)
Classification. Class II. The special control for this device is FDA's “Guidance for the Content of Premarket Notification Submissions for Esophageal and Tracheal Prostheses.”