The Tranquil-C™ Interbody System is intended for use for anterior cervical interbody fusion in skeletally mature patients with cervical disc degeneration and/or cervical spinal instability, as confirmed by imaging studies (radiographs, CT, MRI), that results in radiculopathy, and/or pain at multiple contiguous levels from C2 – T1. The Tranquil-CTM Interbody System is also to be used with supplemental fixation systems that have been cleared for use in the cervical spine. The Tranquil-C™ Interbody System is designed for use with autogenous and/or allogeneic bone graft comprised of cancellous and/or corticocancellous bone graft to facilitate fusion.
Device Story
Cervical interbody fusion system; implants placed in cervical spine (C2-T1) to facilitate fusion. Used in conjunction with autogenous/allogeneic bone graft and supplemental fixation systems. Implants manufactured from titanium alloy; available in various angles, widths, heights, and lengths to match patient anatomy. Used by surgeons in clinical settings. Device provides structural support to the intervertebral space to promote fusion in patients with degenerative disc disease or instability. Modifications include expanded size range and geometry adjustments to existing cleared designs.
Clinical Evidence
No clinical data. Bench testing only; engineering analysis determined that modifications do not create a new worst-case condition, rendering previous performance testing applicable.
Technological Characteristics
Titanium alloy (Ti-6Al-4V ELI) per ASTM F3001. Interbody fusion implant. Provided non-sterile or sterile via gamma irradiation. Instruments provided clean/non-sterile for steam sterilization.
Indications for Use
Indicated for anterior cervical interbody fusion in skeletally mature patients with cervical disc degeneration and/or cervical spinal instability resulting in radiculopathy and/or pain at multiple contiguous levels from C2–T1. Must be used with supplemental cervical fixation and bone graft.
Regulatory Classification
Identification
An intervertebral body fusion device is an implanted single or multiple component spinal device made from a variety of materials, including titanium and polymers. The device is inserted into the intervertebral body space of the cervical or lumbosacral spine, and is intended for intervertebral body fusion.
Special Controls
*Classification.* (1) Class II (special controls) for intervertebral body fusion devices that contain bone grafting material. The special control is the FDA guidance document entitled “Class II Special Controls Guidance Document: Intervertebral Body Fusion Device.” See § 888.1(e) for the availability of this guidance document.(2) Class III (premarket approval) for intervertebral body fusion devices that include any therapeutic biologic (e.g., bone morphogenic protein). Intervertebral body fusion devices that contain any therapeutic biologic require premarket approval.
(c)
*Date premarket approval application (PMA) or notice of product development protocol (PDP) is required.* Devices described in paragraph (b)(2) of this section shall have an approved PMA or a declared completed PDP in effect before being placed in commercial distribution.
Predicate Devices
Nexus Spine, LLC Tranquil Interbody System (K181483)
Nexus Spine, LLC Tranquil Interbody System (K170297)
Nexus Spine, LLC – Stable L and Stable C Interbody System (K232530)
Submission Summary (Full Text)
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March 12, 2024
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Nexus Spine, LLC Christine Scifert MRC Global 9085 East Mineral Circle, Suite 110 Centennial. Colorado 80112
Re: K240416
Trade/Device Name: Tranquil-C Interbody System Regulation Number: 21 CFR 888.3080 Regulation Name: Intervertebral body fusion device Regulatory Class: Class II Product Code: ODP Dated: February 7, 2024 Received: February 12, 2024
Dear Christine Scifert:
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 QS 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 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 (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
# Katherine D. Kavlock -S
for
Brent Showalter, Ph.D. Assistant Director DHT6B: Division of Spinal Devices OHT6: Office of Orthopedic Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
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# Indications for Use
510(k) Number (if known) K240416
Device Name Tranquil-C Interbody System
#### Indications for Use (Describe)
The Tranquil-C™ Interbody System is intended for use for anterior cervical interbody fusion in skeletally mature patients with cervical disc degeneration and/or cervical spinal instability, as confirmed by imaging studies (radiographs, CT, MRI), that results in radiculopathy, and/or pain at multiple contiguous levels from C2 – T1. The Tranquil-CTM Interbody System is also to be used with supplemental fixation systems that have been cleared for use in the cervical spine. The Tranquil-C™ Interbody System is designed for use with autogenous and/or allogeneic bone graft comprised of cancellous and/or corticocancellous bone graft to facilitate fusion.
| Type of Use (Select one or both, as applicable) | |
|-------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------|
| <div> <span> <span style="text-decoration: overline;">X</span> Prescription Use (Part 21 CFR 801 Subpart D) </span> </div> | <div> <span> Over-The-Counter Use (21 CFR 801 Subpart C)</span> </div> |
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#### 510(k) Summary
# Tranquil-C Interbody System February 23, 2024
| Company: | Nexus Spine, LLC<br>2825 East Cottonwood Parkway Suite 330<br>Salt Lake City, UT 84121 |
|----------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Primary/Secondary Contact: | Christine Scifert - Partner<br>MRC Global<br>9085 E. Mineral Cir., Suite 110<br>Centennial, CO 80112<br>Phone: (901) 831-8053<br>Email: christine.scifert@AskMRCGlobal.com<br><br>Jen McBride - Regulatory Consultant<br>(901) 481-5902<br>Email: jen.mcbride@askmcrglobal.com |
| Company Contact: | Jared Crocker<br>Vice President of Quality and Regulatory Affairs<br>Nexus Spine, LLC<br>Phone: (801) 702-8592<br>jared.crocker@nexusspine.com |
| Trade Name: | Tranquil-C Interbody System |
| Common Name: | Intervertebral Fusion Device With Bone Graft, Cervical |
| Classification: | Class II |
| Regulation: | 21 CFR 888.3080 (Intervertebral Fusion Device) |
| Panel: | Orthopedic |
| Product Code: | ODP |
| Primary Predicate: | Nexus Spine, LLC Tranquil Interbody System – K181483 |
#### Device Description:
The Tranquil-C™ Interbody System is a cervical interbody fusion system. Implants are manufactured from titanium alloy (Ti-6Al-4V ELI) per ASTM F3001. The implants are offered in various angles, widths, heights, and lengths to meet patient anatomy for the cervical spine. Implants are provided non-sterile or
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sterile via gamma irradiation. Instruments are provided clean and non-sterile for steam sterilization at the user's facility.
The purpose of this special 510(k) is to gain clearance for modifications to existing cervical implants and the size range offered.
# Indications for Use:
The Tranquil-C™ Interbody System is intended for use for anterior cervical interbody fusion in skeletally mature patients with cervical disc degeneration and/or cervical instability, as confirmed by imaging studies (radiographs, CT, MRI), that results in radiculopathy, and/or pain at multiple contiguous levels from C2 – T1. The Tranquil-C™ Interbody System is also to be used with supplemental fixation systems that have been cleared for use in the cervical spine. The Tranquil-C™ Interbody System is designed for use with autogenous and/or allogeneic bone graft comprised of cancellous and/or corticocancellous bone graft to facilitate fusion.
# Substantial Equivalence:
The subject Nexus Spine Tranquil-C™ Interbody System is substantially equivalent to the following predicate devices:
# Primary Predicate:
- Nexus Spine, LLC, Tranquil™ Interbody System - K181483
# Additional Predicates:
- . Nexus Spine, LLC, Tranquil Interbody System – K170297
- . Spinal Elements, Ventana™ C - K222833
- Nexus Spine, LLC – Stable L and Stable C Interbody System – K232530
There are insignificant differences between the subject Tranquil-C™ Interbody System and the predicate Tranquil-C devices (K181483; K170297). Materials and indications of the subject device are identical to those of the predicate devices. There are slight geometry differences between the subject and predicate devices but the extended size range of the subject device falls within the size range of the previously cleared devices. Thus, it can be concluded that the subject does not raise new questions about safety and effectiveness.
# Performance Testing:
Engineering analysis has determined that the subject changes do not create a new worst case condition. Therefore, previously conducted testing remains applicable an no additional performance testing is required.
# Conclusion:
The subject device is determined to be substantially equivalent to the predicate devices.
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1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
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Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
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Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
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Reading rule for every project: how many summaries do you read in full?
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Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
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Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
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A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
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The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.