The CXI TriForce is intended to be percutaneously introduced into blood vessels and support a wire guide while performing percutaneous peripheral intervention. The product is also intended for injection of radiopaque contrast media for the purpose of angiography.
Device Story
CXI TriForce Peripheral Crossing Set is an introducer set comprising a 5.0 French Flexor introducer sheath, a 4.0 French CXI Support Catheter, and a peel-away sheath; compatible with 0.035" wire guides. Used by physicians in clinical settings for percutaneous peripheral interventions. Device facilitates wire guide support and contrast media injection for angiography. Modified check-flo valve design provides improved hemostasis compared to predicate. Supplied sterile for single-use. Output is physical access and fluid delivery path for interventional procedures; assists clinicians in navigating vasculature and visualizing anatomy via contrast.
Clinical Evidence
Bench testing only. Testing included acute performance verification, check-flo valve liquid leakage testing, and flow rate testing with saline and contrast. Biocompatibility testing performed included cytotoxicity, sensitization, intracutaneous reactivity, acute systemic toxicity, material-mediated pyrogenicity, and hemocompatibility (PTT, SC5b-9, and C3a complement activation). All predetermined acceptance criteria were met.
Technological Characteristics
Introducer set consisting of 5.0F Flexor sheath, 4.0F CXI support catheter, and peel-away sheath. Compatible with 0.035" wire guides. Features modified check-flo valve for hemostasis. Sterile, single-use device. No electronic components or software.
Indications for Use
Indicated for patients undergoing percutaneous peripheral intervention requiring wire guide support and angiography via radiopaque contrast media injection.
Regulatory Classification
Identification
A continuous flush catheter is an attachment to a catheter-transducer system that permits continuous intravascular flushing at a slow infusion rate for the purpose of eliminating clotting, back-leakage, and waveform damping.
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November 13, 2017
Cook Incorporated Ms. Sarah Reeves Regulatory Affairs Manager 750 Daniels Wav, P.O. Box 489 Bloomington, Indiana 47402
Re: K170931
Trade/Device Name: CXI TriForce Peripheral Crossing Set Regulation Number: 21 CFR 870.1210 Regulation Name: Continuous Flush Catheter Regulatory Class: Class II Product Code: KRA Dated: October 24, 2017 Received: October 25, 2017
Dear Ms. Reeves:
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 (OS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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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 the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
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,
Kenneth J. Cavanaugh -S
for
Bram D. Zuckerman, M.D. Director Division of Cardiovascular Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K170931
Device Name
CXI TriForce Peripheral Crossing Set
Indications for Use (Describe)
The CXI TriForce is intended to be percutaneously introduced into blood vessels and support a wire guide while performing percutaneous peripheral intervention. The product is also intended for injection of radiopaque contrast media for the purpose of angiography.
Type of Use (Select one or both, as applicable)
| <div> <span> <span style="text-decoration: overline;">X</span> Prescription Use (Part 21 CER 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
### Submitted By:
Sarah Reeves, RAC Cook Incorporated 750 Daniels Way P.O. Box 489 Bloomington, IN 47402 Phone: (812) 335-3575 x175024 Fax: (812) 332-0281 Date Prepared: 31 October 2017
### Device:
Trade Name: Common Name: Classification: Product Code (Regulation): CXI™ TriForce Peripheral Crossing Set Continuous flush catheter Class II DYB (21 CFR §870.1340)
## Indications for Use:
The CXI™ TriForce is intended to be percutaneously introduced into blood vessels and support a wire guide while performing percutaneous peripheral intervention. The product is also intended for injection of radiopaque contrast media for the purpose of angiography.
### Predicate Device:
The device, subject of this submission, is substantially equivalent to the predicate device of identical name, the CXI™ TriForce Peripheral Crossing Set, cleared under 510(k) number K111263. Additionally, the Flexor Radial Hydrophilic Introducer Access Set (K152044) and the Flexor Check-Flo Introducer, Ansel Modification, Flexor Check-Flo Introducer, Balkin Up and Over Contralateral Design, Flexor Check-Flo Introducer, Raabe Modification and Flexor Check-Flo Performer Introducer (K142829) are considered reference devices for this submission.
COOK INCORPORATED 750 DANIELS WAY, P.O. BOX . LOOMINGTON, IN 47402-0489 812.339.2235 TOLLEREE: 800.45 WWW.COOKMEDICAL.CC
K170931 Page 1 of 3
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SO DANIELS WAY DO F
### Comparison to Predicate Device:
It has been demonstrated that the CXI™ TriForce Peripheral Crossing Set is comparable to the predicate device. The CXI™ TriForce Peripheral Crossing Set is identical in terms of intended use, principles of operation, basic technological characteristics, and materials of construction, with the exception of the modification to labeling and check-flo valve, to the predicate device. The check-flo valve material and design has been modified to provide more consistent hemostasis. The labeling has been updated to provide the user more accurate information for clinical use. The testing performed supports a determination of substantial equivalence to the predicate device.
## Device Description:
The CXI™ TriForce Peripheral Crossing Set is an introducer set, supplied with a 5.0 French Flexor introducer sheath, a 4.0 French CXI Support Catheter and a peel-away sheath. The sets are compatible with the supplied 0.035" wire guide. The sets are supplied sterile and intended for one-time use.
## Test Data:
The following tests were performed to demonstrate that the CXI™ TriForce Peripheral Crossing Set met applicable design and performance requirements and support a determination of substantial equivalence.
- . Acute Performance - Testing performed verified that performance parameters were acceptable for clinical use. The predetermined acceptance criterion was met.
- . Check-Flo valve liquid leakage testing -- Testing verified that the Check-Flo valve will not experience excessive leakage when utilized according to the device's intended use. The predetermined acceptance criteria were met.
- . Flow Rate Testing - Flow rates through the device were measured at designated injection pressures using saline and contrast.
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The following tests were leveraged to support a determination of substantial equivalence.
- . Biocompatibility testing – cytotoxicity, sensitization, intracutaneous reactivity, acute systemic toxicity, material mediated pyrogenicity and hemocompatibility, including partial thromboplastin time, SC5b-9 and C3a complement activation assay, testing have been completed. The predetermined acceptance criteria were met.
In conclusion, the results of these tests support a determination of substantial equivalence to the predicate device.
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1. Search: exact and fuzzy
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Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
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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.
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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.
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.
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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.
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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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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.
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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.
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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.
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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.