The React™ 68 Catheter is indicated for the introduction of interventional devices into the peripheral and neuro vasculature.
Device Story
The React 68 Catheter is a single-lumen, variable-stiffness, percutaneous catheter designed for navigating peripheral and neurovascular anatomy. It features a nitinol-reinforced structure, a PTFE liner, and a hydrophilic coating to facilitate tracking. A radiopaque platinum-iridium markerband at the distal tip allows for fluoroscopic visualization. The device is introduced into the vasculature via a split y-introducer sheath. It is operated by a physician in a clinical setting (e.g., interventional suite) to serve as a conduit for delivering interventional devices. The catheter's design balances proximal stiffness for pushability with distal flexibility for navigation. By providing a stable pathway, it enables the delivery of therapeutic devices to target sites, potentially improving procedural outcomes in neurovascular and peripheral interventions.
Clinical Evidence
No clinical data. Substantial equivalence is supported by non-clinical bench testing, including biocompatibility (ISO 10993-1), mechanical performance (ISO 10555-1), and sterility/pyrogenicity testing (ISO 11737-1, ANSI/AAMI ST72).
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Image /page/0/Picture/0 description: The image contains the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health & Human Services logo. To the right of that is the FDA logo, which is a blue square with the letters "FDA" in white. To the right of the blue square is the text "U.S. FOOD & DRUG ADMINISTRATION" in blue.
July 4, 2018
Micro Therapeutics, Inc. d/b/a ev3 Neurovascular Ryan Kenney Senior Regulatory Affairs Specialist 9775 Toledo Wav Irvine, California 92618
Re: K180715
Trade/Device Name: React 68 Catheter Regulation Number: 21 CFR 870.1250 Regulation Name: Percutaneous Catheter Regulatory Class: Class II Product Code: DQY Dated: June 4, 2018 Received: June 6, 2018
### Dear Ryan Kenney:
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. 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 801); medical device reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820);
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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 http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm.
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/DeviceRegulationandGuidance/) and CDRH Learn (http://www.fda.gov/Training/CDRHLearn). 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 (http://www.fda.gov/DICE) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Image /page/1/Picture/6 description: The image shows the name "Xiaolin Zheng" in a large, bold font, followed by a hyphen. Below the name, there is a large, stylized FDA logo in a light gray color. To the left of the logo, there is a large letter "S".
for Carlos L. Peña, PhD, MS Director Division of Neurological and Physical Medicine Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K180715
Device Name React 68 Catheter
Indications for Use (Describe)
The React™ 68 Catheter is indicated for the introduction of interventional devices into the peripheral and neuro vasculature.
Type of Use (Select one or both, as applicable)
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: K180715
| 510(k) Owner: | Micro Therapeutics, Inc. d/b/a ev3 Neurovascular<br>9775 Toledo Way<br>Irvine, CA 92618<br>Establishment Registration No.: 2029214 |
|---------------------------|------------------------------------------------------------------------------------------------------------------------------------|
| Contact Person: | Ryan Kenney<br>Senior Regulatory Affairs Specialist<br>Telephone: (949) 297-5489<br>Email: ryan.j.kenney@medtronic.com |
| Date Summary<br>Prepared: | June 25, 2018 |
| Trade Name of<br>Device: | React™ 68 Catheter |
| Common Name of<br>Device: | Percutaneous Catheter |
| Review Panel: | Neurology |
| Product Code: | DQY |
| Regulation Number: | 21 CFR 870.1250 |
| Regulation Name: | Percutaneous Catheter |
| Device Classification: | Class II |
| Predicate Device(s): | AXS Catalyst™ Distal Access Catheter<br>510(k)#: K151667<br>ReFlex™ Guide Catheter<br>510(k)#: K110055 |
### Device Description:
The React™ 68 Catheter is a single lumen, flexible, variable stiffness composite catheter with a nitinol structure that is jacketed with a durable polymer outer layer. A lubricous, polytetrafluoroethylene liner is used to create a structure that has both proximal stiffness and distal flexibility, and an encapsulated radiopaque distal platinum-iridium markerband which is used for visualization under fluoroscopy. The React™ 68 Catheter is introduced into the vasculature through the split y-introducer sheath. The proximal end of the React™ 68 Catheter is designed with a thermoplastic elastomer strain relief and a clear hub. The React™ 68 Catheter is designed with a hydrophilic coating.
### Indications for Use:
The React™ 68 Catheter is indicated for the introduction of interventional devices into the peripheral and neuro vasculature.
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| | AXS Catalyst™ Distal<br>Access Catheter<br>(K151667) | ReFlex™ Guide<br>Catheter<br>(K110055) | React™ 68 Catheter |
|---------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------|---------------------|
| Indication for Use<br>(IFU) Statement | The AXS Catalyst™<br>Distal Access Catheter<br>is indicated for the<br>insertion and guidance<br>of appropriately sized<br>interventional devices<br>into a selected blood<br>vessel in the peripheral<br>and neurovascular<br>systems. The AXS<br>Catalyst™ Distal<br>Access Catheter is also<br>indicated for use as a<br>conduit for retrieval<br>devices. | The ReFlex™ Guide<br>Catheter is indicated<br>for the introduction of<br>interventional devices<br>into the peripheral and<br>neuro vasculature. | Same as K110055 |
| Materials | | | |
| Hub | Nylon | Trogamid® | Same as K110055 |
| Strain Relief | Thermoplastic Rubber | Santoprene | DynaFlex® |
| Inner Layer | PTFE | Same | Same |
| Reinforcement | Stainless Steel with<br>Nitinol and Polymer<br>Fiber | Nitinol | Same as K110055 |
| Outer Jacket | Pebax® | Polymeric | Grilamid™<br>Pebax® |
| Markerband | Platinum/<br>Iridium | Same | Same |
| Adhesive | Cyanoacrylate | Same | Same |
| Coating | Hydrophilic | Same | Same |
| Dimensions | | | |
| Working Length | 132 cm | 130 cm | Same as K151667 |
| Inner Diameter (ID) | 0.060" | 0.072" | 0.068" |
| Proximal Outer<br>Diameter (OD) | 0.079" | 0.084" | 0.083" |
| Distal Outer<br>Diameter (OD) | 0.071" | 0.084" | 0.083" |
| Packaged Accessories | | | |
| Peelable Sheath | Yes | Same | Same |
| Rotating Hemostasis<br>Valve | Yes | No | Same as K110055 |
| Packaging | | | |
| Packaging Card | Polyethylene | Same | Same |
| Packaging Hoop | Polyethylene | Same | Same |
| | AXS Catalyst™ Distal<br>Access Catheter<br>(K151667) | ReFlex™ Guide<br>Catheter<br>(K110055) | React™ 68 Catheter |
| Other | | | |
| Sterilization | Ethylene Oxide (EO) | Same | Same |
# Device Comparison:
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Biocompatibility:
Biocompatibility was conducted for the React™ 68 Catheter. The React™ 68 Catheter is categorized as a limited exposure (< 24 hours), external communicating device contacting circulating blood. The following biocompatibility was conducted for the React™ 68 Catheter:
| Test Description | Results | Conclusions |
|-------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------|
| Cytotoxicity<br>(Elution Method) | The test article extract showed<br>no evidence of causing cell<br>lysis or toxicity and had a<br>grade of zero (no reactivity).<br>The test article extract met the<br>requirements of the test since<br>the grade was less than a grade<br>two (mild reactivity). | The ReactTM 68 Catheter is<br>considered non-cytotoxic. |
| Sensitization<br>(Guinea Pig Maximization Test) | The test article extracts<br>showed no evidence of<br>causing delayed dermal<br>contact sensitization in the<br>guinea pig. | The ReactTM 68 Catheter does<br>not elicit a sensitization<br>response. |
| Irritation<br>(Intracutaneous Reactivity) | The difference between each<br>test article extract overall<br>mean score and corresponding<br>control extract overall mean<br>score was 0.0 and 0.0 for the<br>sodium chloride and sesame<br>oil test article extracts,<br>respectively. | The ReactTM 68 Catheter is<br>considered a non-irritant. |
| Acute Systemic Toxicity<br>(Systemic Toxicity) | There was no mortality or<br>evidence of systemic toxicity<br>from the extracts injected. All<br>animals were clinically normal<br>throughout the study. | The ReactTM 68 Catheter does<br>not indicate signs of toxicity. |
| Hemocompatibility<br>(Hemolysis) | The hemolytic index for the<br>test article in direct contact<br>with blood was 0.9%, and the<br>hemolytic index for the test<br>article extract was 0.0%. | The ReactTM 68 Catheter is<br>considered non-hemolytic. |
| Hemocompatibility<br>(Complement Activation) | The concentration of SC5b-9<br>in the sponsor provided<br>control sample was not | The control and test article<br>samples are not considered to |
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| Test Description | Results | Conclusions |
|----------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------|
| | statistically higher than the<br>activated normal human serum<br>control or the negative control. | be potential activators of the<br>complement system. |
| | The concentration of SC5b-9<br>in the test article sample was<br>not statistically higher than the<br>activated normal human serum<br>control, the negative control or<br>the sponsor provided control. | |
| Hemocompatibility<br>(Thrombogenicity) | The thrombogenic potential of<br>the control article was<br>evaluated in comparison to the<br>test article. Both the control<br>and test articles were<br>determined to have minimal<br>thrombus formation after four<br>(4) hours (±30 minutes)<br>without anticoagulation. | The React™ 68 Catheter<br>demonstrates minimal<br>thrombus formation. |
| Pyrogenicity<br>(Material Mediated) | Not a single animal showed a<br>temperature rise of 0.5°C or<br>more above its baseline<br>temperature. The total rise of<br>the temperature during three<br>(3) hours was 0.0°C. | The React™ 68 Catheter is<br>considered non-pyrogenic. |
The React™ 68 Catheter has been evaluated to meet requirements specified in ISO 10993-1.
# Performance Data – Bench:
Non-clinical bench testing was conducted to evaluate the performance of the React™ 68 Catheter. The following non-clinical bench testing was conducted for the React™ 68 Catheter:
| Test | Test Method Summary | Results |
|--------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------|
| Microbial | | |
| Ethylene Oxide Residual | The React™ 68 Catheter was evaluated per ISO 10993-7. | The React™ 68 Catheter met the acceptance criteria for ethylene oxide residual. |
| Ethylene Chlorohydrin Residual | The React™ 68 Catheter was evaluated per ISO 10993-7. | The React™ 68 Catheter met the acceptance criteria for ethylene chlorohydrin residual. |
| Bioburden | The React™ 68 Catheter was evaluated per ISO 11737-1. | The React™ 68 Catheter met the acceptance criteria for bioburden. |
| Test | Test Method Summary | Results |
| Bacterial Endotoxin | The ReactTM 68 Catheter was<br>evaluated per ANSI/AAMI<br>ST72 and USP <161>. | The ReactTM 68 Catheter met<br>the acceptance criteria for<br>bacterial endotoxin. |
| <i>Performance</i> | | |
| Visual Inspection | The ReactTM 68 Catheter was<br>inspected under x2.5<br>magnification. | The ReactTM 68 Catheter met<br>the acceptance criteria for<br>visual inspection. |
| Dimensional Measurements | The proximal ID, distal ID,<br>proximal OD, distal OD, usable<br>length, total length, coating<br>length, and distal tip length of<br>the ReactTM 68 Catheter were<br>measured. | The ReactTM 68 Catheter met<br>the acceptance criteria for<br>dimensional measurements. |
| Tip Buckling | The ReactTM 68 Catheter was<br>evaluated for the maximum<br>compressive force. | The ReactTM 68 Catheter met<br>the acceptance criteria for tip<br>buckling. |
| Kink Resistance | The ReactTM 68 Catheter was<br>evaluated for the maximum<br>kink diameter. | The ReactTM 68 Catheter met<br>the acceptance criteria for kink<br>resistance. |
| Particulate | The ReactTM 68 Catheter was<br>evaluated per USP <788>. | The ReactTM 68 Catheter met<br>the acceptance criteria for<br>particulate evaluation. |
| Coating Lubricity | The ReactTM 68 Catheter was<br>evaluated for the average<br>friction forces. | The ReactTM 68 Catheter met<br>the acceptance criteria for<br>coating lubricity. |
| Tensile Strength | The ReactTM 68 Catheter was<br>evaluated per ISO 10555-1.<br>Annex B. | The ReactTM 68 Catheter met<br>the acceptance criteria for<br>tensile strength at the hub and<br>shaft. |
| Liquid Leak | The ReactTM 68 Catheter was<br>evaluated per ISO 10555-1.<br>Annex C. | The ReactTM 68 Catheter met<br>the acceptance criteria for<br>liquid leak. |
| Corrosion Resistance | The ReactTM 68 Catheter was<br>evaluated per ISO 10555-1.<br>Annex A. | The ReactTM 68 Catheter met<br>the acceptance criteria for<br>corrosion resistance. |
| Hub Aspiration Resistance | The ReactTM 68 Catheter was<br>evaluated per ISO 10555-1.<br>Annex D. | The ReactTM 68 Catheter met<br>the acceptance criteria for hub<br>air aspiration. |
| Compatibility | The ReactTM 68 Catheter was<br>inspected for visual damage of<br>the catheter when delivering<br>and retrieving interventional<br>devices | The ReactTM 68 Catheter met<br>the acceptance criteria for<br>delivering and retrieving<br>interventional devices. |
| Test | Test Method Summary | Results |
| Radiopacity | The markerband length and<br>wall thickness of the React™ 68 Catheter were measured. In<br>addition, radiopacity was<br>confirmed via fluoroscopy. | The React™ 68 Catheter met<br>the acceptance criteria for<br>radiopacity. |
| Luer Standards | The React™ 68 Catheter was<br>evaluated per ISO 594-1 and<br>ISO 80369-7. | The React™ 68 Catheter met<br>the acceptance criteria for luer<br>standards. |
| Torque Strength | The React™ 68 Catheter was<br>evaluated for transmission of<br>proximal torque to the distal<br>tip. | The React™ 68 Catheter was<br>able to withstand torsional<br>forces that are typical of<br>clinical use. |
| Dynamic Pressure | The React™ 68 Catheter was<br>evaluated for the amount of<br>pressure it can withstand. | The React™ 68 Catheter was<br>able to withstand pressures that<br>are typical of clinical use. |
| Coating Integrity | The React™ 68 Catheter was<br>evaluated for coating coverage<br>and lubricity. | The React™ 68 Catheter<br>remained coated and lubricous. |
| Usability | The React™ 68 Catheter and<br>predicate device were evaluated<br>for maneuverability and<br>flexibility. | The React™ 68 Catheter met<br>the acceptance criteria for<br>usability. |
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## Performance Data - Animal:
Not Applicable. A determination of substantial equivalence is based upon successful completion of non-clinical bench testing as there is no change to the intended use or fundamental scientific technology.
### Performance Data - Clinical:
Not Applicable. A determination of substantial equivalence is based upon successful completion of non-clinical bench testing as there is no change to the intended use or fundamental scientific technology.
### Conclusion:
The design modifications incorporated do not alter the intended use or fundamental scientific technology.
Non-clinical bench testing supports a determination that the subject React™ 68 Catheter is substantially equivalent to the 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.