The Flexor® Radial Hydrophilic Introducer Access Set is intended to introduce diagnostic and interventional devices in radial artery access procedures.
Device Story
The Flexor Radial Hydrophilic Introducer Access Set is a sterile, single-use medical device used to facilitate radial artery access. The set includes an introducer sheath, dilator, wire guide, and access needle. It is operated by clinicians in a clinical setting to provide a conduit for diagnostic or interventional instruments. The device features a modified Check-Flo valve designed based on physician feedback to manage liquid leakage during procedures. The sheath is available in various French sizes (4.0-7.0 Fr) and lengths (7, 13, 23 cm). By providing a stable access point, the device enables the delivery of therapeutic or diagnostic tools into the arterial system, benefiting patients by allowing minimally invasive vascular interventions.
Clinical Evidence
Bench testing only. Testing included acute performance verification, Check-Flo valve liquid leakage testing, and comprehensive biocompatibility testing (cytotoxicity, sensitization, intracutaneous reactivity, systemic toxicity, pyrogen, hemocompatibility, complement activation, partial thromboplastin time, and thromboresistance) in conformance with ISO 10993-1:2009. All predetermined acceptance criteria were met.
Technological Characteristics
Introducer set consisting of sheath, dilator, wire guide, and access needle. Sizes: 4.0-7.0 French; lengths: 7, 13, 23 cm. Compatible with 0.018" wire guide. Features a modified Check-Flo valve. Biocompatibility per ISO 10993-1:2009. Sterile, single-use.
Indications for Use
Indicated for patients requiring radial artery access for the introduction of diagnostic and interventional devices.
Regulatory Classification
Identification
A catheter introducer is a sheath used to facilitate placing a catheter through the skin into a vein or artery.
Predicate Devices
Flexor® Radial Hydrophilic Introducer Access Set (K132592)
Submission Summary (Full Text)
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
August 14, 2015
Cook Incorporated Sarah Reeves Regulatory Engineer 750 Daniels Way, P.O. Box 489 Bloomington, IN, 47402
Re: K152044
Trade/Device Name: Flexor Radial Hydrophilic Introducer Access Set Regulation Number: 21 CFR 870.1340 Regulation Name: Catheter introducer Regulatory Class: II Product Code: DYB Dated: July 22, 2015 Received: July 23, 2015
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 (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); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638 2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. 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.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours,
M.A. Hillebrand
for Bram D. Zuckerman, M.D. Director Division of Cardiovascular Devices Office of Device Evaluation Center for Devices and Radiological Health
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#### Indications for Use
K152044 510(k) Number (if known):
Device Name: Flexor® Radial Hydrophilic Introducer Access Set
Indications for Use for the Flexor® Radial Hydrophilic Introducer Access Set:
The Flexor® Radial Hydrophilic Introducer Access Set is intended to introduce diagnostic and interventional devices in radial artery access procedures.
Prescription Use X (Part 21 CFR 801 Subpart D) OR
Over-the-Counter Use (21 CFR 801 Subpart C)
# (PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
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# 510(k) SUMMARY
### Submitted By:
Sarah Reeves Cook Incorporated 750 Daniels Way P.O. Box 489 Bloomington, IN 47402 Phone: (812) 335-3575 x105024 Fax: (812) 332-0281 Date Prepared: July 22, 2015
# Device:
Trade Name: Common Name: Classification Name: Flexor® Radial Hydrophilic Introducer Access Set Introducer Set Catheter, Introducer DYB (21 CFR §870.1340)
### Indications for Use:
The Flexor® Radial Hydrophilic Introducer Access Set is intended to introduce diagnostic and interventional devices in radial artery access procedures.
### Predicate Device:
The device, subject of this submission, is substantially equivalent to the predicate device of identical name, the Flexor® Radial Hydrophilic Introducer Access Set, cleared under 510(k) number K132592.
### Comparison to Predicate Device:
It has been demonstrated that the Flexor® Radial Hydrophilic Introducer Access Set is comparable to the predicate device. The Flexor® Radial Hydrophilic Introducer Access Sets are identical in terms of intended use, principles of operation, basic technological characteristics, and
COOK INCORPORATED
750 DANIELS WAY, P.O. BOX 48
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materials of construction, with the exception of the check-flo valve, to the predicate device. The check-flo valve has been modified in response to physician feedback. The safety and effectiveness of the modifications are supported by testing.
# Device Description:
The Flexor® Radial Hydrophilic Introducer Access Set is an introducer set, supplied with an introducer sheath, dilator, wire guide and access needle. The introducers are available in whole French sizes from 4.0 through 7.0 French and in lengths of 7, 13 and 23 centimeters. The sets are compatible with the supplied 0.018" wire guide. The sets are supplied sterile and intended for one-time use.
# Test Data:
The following tests were performed to demonstrate that the Flexor® Radial Hydrophilic Introducer Access 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.
- . Biocompatibility testing - Testing (i.e., cytotoxicity, sensitization, intracutaneous reactivity, systemic toxicity, pyrogen, hemocompatibility, complement activation, partial thromboplastin time, and thromboresistance) demonstrated the device as biocompatible. In conformance with the applicable sections of ISO 10993-1:2009, 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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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.
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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).
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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.
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.
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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.
What does the side-by-side PDF viewer mode do?
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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.
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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.
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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.