The Microcatheter is indicated for use in the selective placement of devices and/or fluids, such as contrast media, into the peripheral, coronary, and neuro vasculature during diagnostic and/or therapeutic procedures.
Device Story
Trevo Trak 21 Microcatheter is a single-lumen, braided shaft, variable stiffness catheter designed for navigation within peripheral, coronary, and neuro vasculature. It features a hydrophilic coating to reduce friction and radiopaque markers for fluoroscopic visualization. The device is advanced over a guide wire to a target location to facilitate the delivery of therapeutic devices or contrast media. It is intended for use by physicians in clinical settings. The device is supplied sterile for single use. The primary clinical benefit is enabling precise, minimally invasive access to complex vascular anatomy for diagnostic or therapeutic interventions.
Clinical Evidence
No clinical or animal studies were conducted. Substantial equivalence is supported by non-clinical bench testing, including simulated use/compatibility, particulate characterization, coating integrity, and track force testing. All tests met established acceptance criteria.
Indicated for selective placement of devices and/or fluids (e.g., contrast media) into peripheral, coronary, and neuro vasculature during diagnostic or therapeutic procedures. No specific age or gender restrictions.
Regulatory Classification
Identification
A percutaneous catheter is a device that is introduced into a vein or artery through the skin using a dilator and a sheath (introducer) or guide wire.
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November 26, 2021
Image /page/0/Picture/1 description: The image shows the logo of the U.S. Food and Drug Administration (FDA). The logo consists of two parts: the Department of Health & Human Services logo on the left and the FDA logo on the right. The FDA logo is in blue and includes the letters "FDA" followed by the words "U.S. FOOD & DRUG ADMINISTRATION".
Stryker Neurovascular Shivani H. Patel Senior Staff Regulatory Affairs Specialist 47900 Bayside Parkway Fremont, California 94538
Re: K211594
Trade/Device Name: Trevo Trak 21 Microcatheter Regulation Number: 21 CFR 870.1250 Regulation Name: Percutaneous Catheter Regulatory Class: Class II Product Code: QJP, DQY, DQO Dated: November 9, 2021 Received: November 10, 2021
Dear Shivani H. Patel:
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 requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part
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801); 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 (QS) 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 (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Naira Muradyan, Ph.D. Assistant Director DHT5A: Division of Neurosurgical, Neurointerventional and Neurodiagnostic Devices OHT5: Office of Neurological and Physical Medicine 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) K211594
Device Name Trevo Trak™ 21 Microcatheter
Indications for Use (Describe)
The Microcatheter is indicated for use in the selective placement of devices and/or fluids, such as contrast media, into the peripheral, coronary, and neuro vasculature during diagnostic and/or therapeutic procedures.
X Prescription Use (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (21 CFR 801 Subpart C)
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# 510(k) Summary K211594
| Trade/Proprietary Name: | Trevo Trak™ 21 Microcatheter |
|-------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------|
| Common Name: | Catheter, Percutaneous, Neurovasculature |
| Regulation Name: | Percutaneous Catheter, 21 CFR 870.1250 - Class II |
| Product Code: | QJP |
| Trade/Proprietary Name: | Trevo Trak™ 21 Microcatheter |
| Common Name: | Catheter, Intravascular, Diagnostic |
| Regulation Name: | Catheter, Intravascular, Diagnostic, 21 CFR 870.1200 - Class II |
| Product Code: | DQO |
| Trade/Proprietary Name: | Trevo Trak™ 21 Microcatheter |
| Common Name: | Percutaneous Catheter |
| Regulation Name: | Percutaneous Catheter, 21 CFR 870.1250 - Class II |
| Product Code: | DQY |
| Submitter: | Stryker Neurovascular<br>47900 Bayside Parkway<br>Fremont, CA 94538-6515<br>(FDA Registration Number: 3008853977) |
| Contact: | Shivani H. Patel<br>Senior Staff Regulatory Affairs Specialist<br>Phone: 341-465-2199<br>Fax: 510-413-2724<br>Email: Shivani.Pate12@stryker.com |
| Date Prepared: | November 18, 2021 |
# Legally Marketed Predicate Devices
| Name of Predicate Device | Name of<br>Manufacturer | 510(k)<br>Number |
|---------------------------------|--------------------------|------------------|
| Trevo Trak™ 21<br>Microcatheter | Stryker<br>Neurovascular | K192122 |
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# Device Description
The Trevo Trak 21 Microcatheter is a single-lumen, braided shaft, variable stiffness catheter with radiopaque marker(s) on the distal end and a Luer hub on the proximal end. The catheter shaft has a hydrophilic coating to reduce friction during use. The radiopaque shaft and distal marker(s) facilitate fluoroscopic visualization.
### Indications for Use
The Microcatheter is indicated for use in the selective placement of devices and/or fluids, such as contrast media, into the peripheral, coronary, and neuro vasculature during diagnostic and/or therapeutic procedures.
# Technological Characteristics and Product Feature Comnarison
Stryker Neurovascular has demonstrated the Trevo Trak™ 21 Microcatheter is substantially equivalent to the Predicate device, Trevo Trak 21 Microcatheter (K192122), based on the same materials, same design, and the same fundamental operating principles. A comparison of the Subject device with the Predicate device is summarized in Table 1 below.
| Detail | Subject Device | Predicate Device (K192122) |
|--------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------|
| Manufacturer | Stryker Neurovascular | Same |
| 510(k) Number | K211594 | K192122 |
| Device Trade Name | Trevo Trak™ 21<br>Microcatheter | Same |
| Regulation Number | 21 CFR 870.1250<br>21 CFR 870.1200 | Same |
| Regulation Name | Percutaneous Catheter | Same |
| Classification | II | Same |
| Product Code | QJP, DQO, DQY | DQO, DQY |
| Indication for Use | The Microcatheter is indicated for<br>use in the selective placement of<br>devices and/or fluids, such as<br>contrast media, into the | Same |
| Detail | Subject Device | Predicate Device (K192122) |
| | peripheral, coronary, and neuro<br>vasculature during diagnostic<br>and/or therapeutic procedures. | |
| Device Description | The Microcatheter is a single-<br>lumen, braided shaft, variable<br>stiffness catheter with radiopaque<br>marker(s) on the distal end and a<br>Luer hub on the proximal end.<br>The catheter shaft has a<br>hydrophilic coating to reduce<br>friction during use. The<br>radiopaque shaft and distal<br>marker(s) facilitate fluoroscopic<br> | Same |
| Accessory Devices<br>Provided (not in<br>direct contact with<br>patient) | Rotating Hemostasis Valve<br>(RHV) packaged within device | Same |
| Outer Jacket | Polymeric microcatheter | Same |
| Shaft Braid | Stainless Steel | Same |
| Strain Relief | Polyolefin | Same |
| Inner Layer | PTFE | Same |
| Catheter Hub | Polyurethane | Same |
| Marker Band | Platinum/Iridium | Same |
| Adhesive | Acrylic (Acrylated Urethane) | Same |
| Outer Jacket Coating | Hydrophilic Coating | Same |
| Detail | Subject Device | Predicate Device (K192122) |
| Labeled Shaft Outer<br>Diameter | 2.4F/2.0F | Same |
| Labeled Shaft Inner<br>Diameter | .021" | Same |
| Effective Length | 162 cm | Same |
| Packaging Materials<br>and Configuration | HDPE Packaging Hoop,<br>Tyvek/Film Pouch, SBS Carton | Same |
| Sterilization Method | EO Sterilization | Same |
| How Supplied | Single Use/Sterile | Same |
| Shelf-Life | 6 months | 2 years |
| Principles of<br>Operation | The device is advanced into the<br>vasculature over an appropriately<br>sized guide wire. Once the<br>microcatheter is inserted, the<br>catheter can be advanced through<br>the vasculature to the desired<br>location. | Same |
| Recommended<br>minimum<br>inner<br>diameter of guide<br>catheter | 0.046 inch inner diameter | 0.058 inch inner diameter |
#### Table 1. Product Feature Comparison of Subject Device to Predicate Device
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The differences between the devices do not raise new questions of safety and effectiveness.
#### Risk Assessment
A risk assessment of the Trevo Trak 21 Microcatheter has been conducted in accordance with EN ISO 14971. Stryker Neurovascular has determined that the labeling changes to the Trevo Trak 21 Microcatheter raise no new questions of safety and effectiveness. The results of testing demonstrate that the Trevo Trak 21 Microcatheter with the modified labeling is substantially equivalent to the legally marketed Predicate device.
# Testing Summary
#### Performance Data – Bench Testing
Stryker Neurovascular performed the following non-clinical bench testing to assess the compatibility of the Trevo Trak 21 Microcatheter with 0.046 inch inner diameter (ID) guide catheters. The bench testing is summarized in Table 2 below.
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| Test | Test Method Summary | Conclusions |
|---------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------|
| Simulated<br>Use/Compatibility | User will assess Trevo Trak™ 21 Microcatheter<br>with a worst case compatible guide catheter in the<br>in vitro simulated use model. | Simulated Use<br>testing met<br>acceptance criteria. |
| Particulate<br>Characterization | Use light obscuration particle counting to<br>measure the total number of particulates<br>generated during simulated use. | Particulate<br>generation was<br>acceptable and<br>comparable to<br>the predicate<br>device. |
| Coating Integrity | Use visual inspection to identify the location,<br>size, and number of occurrences of anomalies on<br>the coated surface of the Trevo Trak™ 21<br>Microcatheter before<br>and after simulated use. | Coating integrity<br>was acceptable both<br>before and after<br>simulated use. |
| Track Force Testing | Use a Track Tester Model to measure the Trevo<br>Trak™ 21 Microcatheter track force through a<br>guide catheter during simulated use. | Track Testing<br>results met<br>acceptance criteria. |
Table 2. Performance Data - Bench Testing
#### Performance Data – Animal Study. Clinical Study
No animal study or clinical study was conducted as bench testing was determined sufficient for verification and validation purposes.
#### Shelf Life Testing
The labeled shelf life for the Trevo Trak 21 Microcatheter is six-months. Product shelf-life testing was performed on the Subject device and the results met established criteria. The packaging shelf-life and Distribution Shipping Challenge Conditioning and testing was performed on the Predicate device and test results were reviewed and cleared in K192122.
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# Sterilization
The sterilization evaluation previously conducted for the Trevo Trak 21 Microcatheter was used to support the subject device and can be found in K192122. The Trevo Trak 21 Microcatheter is sterilized with 100% Ethylene Oxide. The Trevo Trak 21 Microcatheter and accessory are provided sterile. A sterility assurance level (SAL) of 106 has been demonstrated. The Trevo Trak 21 Microcatheter and accessory meet EO residuals per EN ISO 10993-7 for a limited contact delivery system – externally communicating. The Trevo Trak 21 Microcatheter and accessory are for single use only.
#### Biocompatibility
The biocompatibility testing previously conducted for the Trevo Trak 21 Microcatheter was used to support the subject device and can be found in K192122. The results of biocompatibility testing and biological safety evaluation of the Trevo Trak 21 Microcatheter demonstrate that the device meets the biological safety requirements per EN ISO 10993-1, "Biological evaluation of Medical Devices – Part 1: Evaluation and Testing within a Risk Management Process" for an externally communicating medical device with circulating blood contact for less than 24 hours. Therefore, the Trevo Trak 21 Microcatheter, accessory, and primary packaging are considered biocompatible for their intended use.
#### Conclusion
Stryker Neurovascular has demonstrated the Trevo Trak 21 Microcatheter is substantially equivalent to the Predicate device (K192122) based on same intended use / indications for use, same materials, same fundamental design, and the same operating principles. The conclusions drawn from the risk assessment and the bench testing results summarized above demonstrate that the benefits of the device outweigh any residual risks when used in accordance with the device Instructions for Use. Stryker Neurovascular has demonstrated that the Trevo Trak 21 Microcatheter is substantially equivalent to the legally marketed Predicate device.
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
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.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
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.
What does the AI Performance sub-table show, and why is it useful?
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.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
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.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
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.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
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.