The Accoat Guide Wire is intended to facilitate placement of devices during diagnostic and interventional procedures. It is not intended for use in the coronary vasculature or neurovasculature.
Device Story
Accoat Guide Wire is a stainless-steel guide wire used to facilitate placement of diagnostic/interventional devices in peripheral vasculature; excludes coronary/neurovasculature. Device features flexible stainless-steel coil and core; optional hydrophobic PTFE coating. Available in lengths 20-450cm; diameters 0.018-0.038"; various shaft stiffnesses; straight or J-tips (1.5-15mm radius). Variants include double-ended tips and moveable core (stiffness adjustable via proximal handle). Supplied sterile (ethylene oxide) in dispenser with luer lock and straightener. Operated by clinicians during percutaneous procedures; provides mechanical guidance for catheter/device navigation. Benefits include improved device delivery and procedural flexibility.
Clinical Evidence
Bench testing only. Performance testing included visual examination, dimensional verification, simulated use, tensile strength, tip pull, torque strength/torqueability, coating integrity, particulate evaluation, lubricity, corrosion resistance, kink resistance, tip flexibility, and radiopacity. Biocompatibility testing per ISO 10993-1 for limited duration (<24 hours) contact with circulating blood included cytotoxicity, sensitization, intracutaneous reactivity, pyrogenicity, acute systemic toxicity, PTT, complement activation, hemolysis, and platelet/leukocyte counts. Sterility, transportation, and packaging integrity testing also performed.
Technological Characteristics
Materials: Stainless steel, optional PTFE coating. Dimensions: 20-450cm length, 0.018-0.038" diameter. Features: Flexible coil, variable shaft stiffness, straight/J-tips, moveable core, double-ended options. Sterilization: Ethylene oxide. Packaging: Dispenser with luer lock and straightener in peel pouch. Biocompatibility: ISO 10993-1 compliant. No software or electronic components.
Indications for Use
Indicated for facilitating placement of devices during diagnostic and interventional procedures in the peripheral vasculature. Contraindicated for use in coronary or neurovasculature.
Regulatory Classification
Identification
A catheter guide wire is a coiled wire that is designed to fit inside a percutaneous catheter for the purpose of directing the catheter through a blood vessel.
Special Controls
*Classification.* Class II (special controls). The device, when it is a torque device that is manually operated, non-patient contacting, and intended to manipulate non-cerebral vascular guide wires, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 870.9.
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**FDA** U.S. FOOD & DRUG
ADMINISTRATION
July 14, 2026
SP Medical A/S
Philip Davenport
Regulatory Specialist
Møllevej 1
Karise, DK-4653
Denmark
Re: K253667/S001
Trade/Device Name: Accoat Guide Wire
Regulation Number: 21 CFR 870.1330
Regulation Name: Catheter Guide Wire
Regulatory Class: Class II
Product Code: DQX
Dated: November 6, 2025
Received: June 12, 2026
Dear Philip Davenport:
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.
U.S. Food & Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993
www.fda.gov
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K253667 - Philip Davenport
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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).
Your device is also subject to, among other requirements, the Quality Management System Regulation (QMSR) (21 CFR Part 820), which includes, but is not limited to, ISO 13485 clause 7.3 (Design controls), ISO 13485 clause 8.3 (Nonconforming product), ISO 13485 clause 8.5.2 (Corrective action), and ISO 13485 clause 8.5.3 (Preventative action). Please note that regardless of whether a change requires premarket review, the QMSR requires device manufacturers to review and approve changes to device design and production (ISO 13485 clause 7.3 and ISO 13485 clause 7.5) and document changes and approvals in the Medical Device File (ISO 13485 clause 4.2.3).
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 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-reporting-combination-products); good manufacturing practice requirements as set forth in the Quality Management System Regulation (QMSR) (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.
All medical devices, including Class I and unclassified devices and combination product device constituent parts are required to be in compliance with the final Unique Device Identification System rule ("UDI Rule"). The UDI Rule requires, among other things, that a device bear a unique device identifier (UDI) on its label and package (21 CFR 801.20(a)) unless an exception or alternative applies (21 CFR 801.20(b)) and that the dates on the device label be formatted in accordance with 21 CFR 801.18. The UDI Rule (21 CFR 830.300(a) and 830.320(b)) also requires that certain information be submitted to the Global Unique Device Identification Database (GUDID) (21 CFR Part 830 Subpart E). For additional information on these requirements, please see the UDI System webpage at https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory-assistance/unique-device-identification-system-udi-system.
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-devices/medical-device-safety/medical-device-reporting-mdr-how-report-medical-device-problems.
For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medical-devices/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-devices/device-advice-comprehensive-regulatory-
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K253667 - Philip Davenport
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assistance/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,

Lydia Glaw
Assistant Director
DHT2C: Division of Coronary and Peripheral Intervention Devices
OHT2: Office of Cardiovascular Devices
Office of Product Evaluation and Quality
Center for Devices and Radiological Health
Enclosure
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DEPARTMENT OF HEALTH AND HUMAN SERVICES
Food and Drug Administration
# **Indications for Use**
Form Approved: OMB No. 0910-0120
Expiration Date: 07/31/2026
See PRA Statement below.
510(k) Number (if known)
K253667
Device Name
Accoat Guide Wire
Indications for Use (Describe)
The Accoat Guide Wire is intended to facilitate placement of devices during diagnostic and interventional procedures. It is not intended for use in the coronary vasculature or neurovasculature.
Type of Use (Select one or both, as applicable)
☑ Prescription Use (Part 21 CFR 801 Subpart D)
☐ Over-The-Counter Use (21 CFR 801 Subpart C)
**CONTINUE ON A SEPARATE PAGE IF NEEDED.**
This section applies only to requirements of the Paperwork Reduction Act of 1995.
**\*DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW.\***
The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to:
Department of Health and Human Services
Food and Drug Administration
Office of Chief Information Officer
Paperwork Reduction Act (PRA) Staff
PRAStaff@fda.hhs.gov
*"An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number."*
FORM FDA 3881 (8/23)
Page 1 of 1
PSC Publishing Services (301) 443-6740 EF
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SP Medical
510(k) Summary
Accoat Guide Wire
GWACUS-REP-05.v02
510(k) Summary for K253667
Date Prepared: June 10, 2026
Submitted by:
Philip Davenport
Regulatory Specialist
Manufacturer:
SP Medical A/S
Møllevej 1, Karise, DK-4653 Denmark
+45 56 76 60 00
info@sp-medical.dk
Device information:
| Trade name: | Accoat Guide Wire |
| --- | --- |
| Common name: | Guide wire |
| Classification name: | Wire, Guide, Catheter |
| Regulatory Class: | Class II |
| Product code: | DQX |
| Regulation: | 21 CFR 870.1330 |
| Classification Panel: | Cardiovascular |
Predicate device:
The Cook Fixed Core Wire Guide (K171764) is a fixed core guide wire intended to facilitate placement of devices during diagnostic and interventional procedures. It is cleared under regulation 21 CFR 870.1330.
Reference devices:
Reference devices are the Cook Double Flexible Tipped Wire Guides (K171912) and the Amplatz Moveable Core Guidewire (K864058). These are cleared under regulation 21 CFR 870.1330.
Device description:
The Accoat Guide Wire is a guide wire with a flexible stainless-steel coil and a stainless-steel core. It is optionally available with a hydrophobic PTFE coating. It is available in lengths from 20cm to 450cm. It is available in a range of diameters from 0.018" to 0.038". Shaft stiffnesses may be standard, stiff, extra stiff or super stiff. Wire tips may be straight, or with a J-Tip with a radius of 1.5mm to 15mm.
A double-ended variant is available where either the distal and proximal end of the wire may be introduced into the patient. A moveable core variant is available where the stiffness at the distal end may be adjusted in the procedure by withdrawing or advancing a handle at the proximal end.
The guide wire is supplied in a dispenser with a luer lock and straightener, placed within a peel pouch. The product is supplied sterile, via ethylene oxide sterilization. The device is supplied in a product box containing 10 peel pouches and an IFU. The peel pouch and product box are labelled.
Intended use
The Accoat Guide Wire is intended to facilitate placement of devices during diagnostic and interventional procedures. It is not intended for use in the coronary vasculature or neurovasculature.
Indications for use:
The Accoat Guide Wire is intended to facilitate placement of devices during diagnostic and interventional procedures. It is not intended for use in the coronary vasculature or neurovasculature.
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SP Medical
510(k) Summary
Accoat Guide Wire
GWACUS-REP-05.v02
Technological comparison to predicate and reference devices:
| Feature | Accoat Guide Wire | Cook Fixed Core Wire Guide | Cook Double Flexible Tinned Wire Guides | Amplatz Moveable Core Guidewire | Comment |
| --- | --- | --- | --- | --- | --- |
| Device | Subject device | Predicate device | Reference Device | Reference Device | N/A |
| Product code | DQX | DQX | DQX | DQX | No difference |
| Regulation | 870.1330 | 870.1330 | 870.1330 | 870.1330 | No difference |
| Class | 2 | 2 | 2 | 2 | No difference |
| 510(k) reference | K253667 | K171764 | K171912 | K864058 | N/A |
| Intended use | Intended to facilitate placement of devices during diagnostic and interventional procedures. | Intended to facilitate placement of devices during diagnostic and interventional procedures. | Intended to facilitate placement of devices during diagnostic and interventional procedures. | intended for use in the percutaneous introduction of catheters. | Substantially equivalent. No difference to predicate device. All devices are intended to enable percutaneous introduction of vascular devices. |
| Area of use | Peripheral vasculature. Coronary and neurovascular use excluded. | Peripheral vasculature. Coronary and neurovascular use excluded. | Peripheral vasculature. Coronary and neurovascular use excluded. | Angiographic use. | Substantially equivalent. No difference to predicate device. Narrower definition than reference device. |
| Wire Length | 20cm – 450cm | 15cm – 480cm | 30cm – 260cm | 125cm - 150cm | Substantially equivalent. Within subset of predicate and reference devices. |
| Wire Diameter | 0.018" – 0.038" | 0.018" – 0.038" | 0.015" – 0.038" | 0.035" – 0.038" | Substantially equivalent. Within subset of predicate and reference devices. |
| Tip type | Straight 1.5mm – 15mm J Tip | Straight 3mm – 15mm | Straight 3mm J Tip | Straight 3mm – 15mm J Tip | Substantially equivalent. Similar in size and function to predicate and reference devices. |
| Wire material | Stainless steel | Stainless steel | Stainless steel | Stainless steel | No difference |
| Coating | Uncoated or PTFE | Uncoated or PTFE | Uncoated or PTFE | Uncoated or PTFE or Heparin | Substantially equivalent. No difference to predicate. Within range of reference device. |
| Packaging | Dispenser in a peel pouch. | Dispenser in a peel pouch. | Dispenser in a peel pouch. | Dispenser in a peel pouch. | No difference |
| Sterilization | Ethylene oxide | Ethylene oxide | Ethylene oxide | Ethylene oxide | No difference |
| Shelf life | 5 years | 5 years | 5 years | 5 years | No difference |
The differences of the subject device in comparison to the predicate device are Accoat Guide Wire is available in a double ended tip configuration and a movable core configuration.
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SP Medical
510(k) Summary
### Accoat Guide Wire
GWACUS-REP-05.v02
#### Performance testing:
The Accoat Guide Wire has been tested to demonstrate that the relevant design and performance requirements have been met, and the results support a determination of substantial equivalence to the predicate device. The following tests have been performed:
• Visual examination
• Dimensional verification
- Simulated use
- Tensile strength
- Tip pull
- Torque strength
- Torqueability
- Coating integrity
• Particulate evaluation
- Lubricity
• Corrosion resistance
- Kink resistance
- Tip flexibility
- Radiopacity
#### Additional testing:
Additional testing has also been carried out to demonstrate the effective use of the subject device. These include:
- Sterility testing
• Transportation testing
• Peel pouch seal strength and seal integrity testing
#### Biocompatibility testing:
The Accoat Guide Wire is considered an external-communicating device, in contact with circulating blood for a limited duration (<24 hours) according to ISO 10993-1. Accordingly, the following biocompatibility testing was performed:
- Cytotoxicity
- Sensitization
• Intracutaneous reactivity
• Material-mediated pyrogenicity
• Acute systemic toxicity
• Partial thromboplastin time
• Complement activation
- Hemolysis
• Platelet and leukocyte count
• Comparative surface assessment
#### Conclusion:
The results of the tests performed support the conclusion that the Accoat Guide Wire met the design input requirements based on the stated intended use, and that these devices do not raise new issues of safety or effectiveness. They support determination that the subject device is substantially equivalent to the predicate device.
Page 3 of 3
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.