The Glidewire GT is designed to direct a catheter to the desired anatomical location in the peripheral vasculature during diagnostic or interventional procedures. This device is not intended for neurovascular or coronary interventions.
Device Story
Manual guide wire; directs catheters to anatomical locations in peripheral vasculature during diagnostic/interventional procedures. Core wire: Nickel-Titanium superelastic alloy; distal tip: flexible radiopaque gold coil. Available in straight/angled configurations; shapeable or preshaped. Used in clinical settings by physicians. Includes guide wire inserter, torque device, and mandrel (shapeable type). Facilitates navigation through vasculature; aids catheter placement. Benefits patient by enabling access to target peripheral sites for diagnosis or treatment.
Clinical Evidence
No clinical data. Bench testing only, including surface, radiodetectability, fracture, flexing, tensile force, torque strength, torqueability, tip flexibility, sliding resistance, and particulate evaluation per ISO 11070:2014 and FDA guidance.
Indicated for directing catheters to desired anatomical locations in the peripheral vasculature during diagnostic or interventional procedures. Not for neurovascular or coronary interventions.
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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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
September 15, 2017
Terumo Medical Corporation Ms. Monika McDole-Russell, MSRA, RAC Manager, Regulatory Affairs 265 Davidson Ave.. Suite 320 Somerset, New Jersey 08873
Re: K170417
Trade/Device Name: Glidewire GT Regulation Number: 21 CFR 870.1330 Regulation Name: Catheter Guide Wire Regulatory Class: Class II Product Code: DQX Dated: September 1, 2017 Received: September 5, 2017
Dear Ms. McDole-Russell:
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
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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.
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 (DICE) 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 (DICE) 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,
# 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) K170417
Device Name Glidewire GT
Indications for Use (Describe)
The Glidewire GT is designed to direct a catheter to the desired anatomical location in the peripheral vasculature during diagnostic or interventional procedures. This device is not intended for neurovascular or coronary interventions.
| Type of Use (Select one or both, as applicable) |
|-------------------------------------------------|
| Prescription Use (Part 21 CFR 201 Subpart D) |
| Over-The-Counter Use (21 CFR 201 Subpart C) |
> Prescription Use (Part 21 CFR 801 Subpart D)
| | Over-The-Counter Use (21 CFR 801 Subpart C)
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## 510(K) SUMMARY
# A. SUBMITTER INFORMATION (807.92(a)(1))
### Prepared by/
| Contact Person: Monika McDole-Russell, Manager, Regulatory Affairs |
|--------------------------------------------------------------------|
| Terumo Medical Corporation |
| 265 Davidson Avenue, Suite 320, Somerset NJ 08873 |
| Phone#: (732)302-4900, ext. 4273 FAX#: (410) 398-6079 |
| E-mail: monika.mcdolerussell@terumomedical.com |
# Prepared for: Owner/Operator Terumo Corporation 44-1, 2-Chome, Hatagaya, Shibuya-Ku, Tokyo, Japan 151-0072 Registration Number: 801 002 6
## Manufacturer and Sterilization Facility
Ashitaka Factory of Terumo Corporation 150 Maimaigi-cho, Fujinomiya, Shizuoka, Japan 418-0015 Registration No: 968 183 4
Date prepared: September 12, 2017
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#### B. DEVICE NAME (807.92(a)(2))
| Proprietary Name: | Glidewire® GT |
|-----------------------|-----------------------|
| Common Name: | Guide wire |
| Classification Name: | Wire, Guide, Catheter |
| Classification Panel: | Cardiovascular |
| Regulation: | 21 CFR 870.1330 |
| Product Code: | DQX |
| Classification: | Class II |
#### C. PREDICATE DEVICE (807.92(a)(3))
The legally marketed device to which substantial equivalence is claimed is:
K863138 – Terumo Radifocus Guide Wire, manufactured by Ashitaka Factory of Terumo Corporation
The reference predicate is:
K122590 - Radifocus Glidewire Advantage manufactured by Ashitaka Factory of Terumo Corporation.
#### D. REASON FOR 510(k) SUBMISSION
This premarket notification (510(k)) is being submitted for a new guide wire for peripheral use for the purpose of establishing substantial equivalence to a legally marketed predicate device.
## E. DEVICE DESCRIPTION (807.92(a)(4))
#### Principle of Operation Technology
The Glidewire® GT is operated by manual process.
#### Design/Construction
The Glidewire® GT is a guide wire which is designed to direct a catheter to the desired anatomical location in the peripheral vasculature during diagnostic or interventional procedures. It is provided sterile and is intended for single use only. The Glidewire® GT consists of a core wire of a Nickel Titanium superelastic alloy and has a flexible radiopaque gold coil around the distal tip of the core wire. The Glidewire® GT is offered with two distal tip types: Shapeable and Preshaped.
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The wire distal segment comes in angled or straight configurations. Physicians choose the guide wire types depending upon their personal preference and the type of interventional procedure being performed. Other considerations may include: anatomy, difficulty of access, and the interventional device used for procedure. The device is packaged in a plastic holder that is contained within an individual package. A guide wire inserter, torque device and mandrel (Shapeable type only) are contained within the individual package to assist with the manipulation of the guide wire. Following the guide wire insertion, the guide wire inserter is removed from the proximal portion of guide wire.
#### Specifications
The specifications for the Glidewire® GT are provided in the table below.
| Part | Specification |
|---------------------------------|------------------------------------------------------------------------------------------------------------|
| Diameter of Guide Wire | 0.014", 0.016", 0.018" |
| Length of Guide Wire | 180 cm, 200 cm |
| Distal Shape Processing<br>Type | Preshaped, Shapeable |
| Tip configuration | Straight, Angled (Angled (45°, 90°),<br>Double Angled, Large curve) |
| Accessory Device | Guide Wire Inserter, Torque Device,<br>Mandrel*<br>*: Mandrel is only included with the<br>Shapeable type. |
| Table 5.1: Glidewire® GT Specifications | | | |
|-----------------------------------------|--|--|--|
|-----------------------------------------|--|--|--|
# F. INDICATIONS FOR USE (807.92(a)(5))
The Glidewire® GT is designed to direct a catheter to the desired anatomical location in the peripheral vasculature during diagnostic or interventional procedures. This device is not intended for neurovascular or coronary interventions.
## G. SUBSTANTIAL EQUIVALENCE COMPARISON (807.92(a)(6))
The Glidewire® GT, subject of this 510(k), is substantially equivalent in its intended use/indications for use, technology/principal of operation, materials, and performance to the Terumo Radifocus Guide Wire, cleared under K863138, manufactured by Ashitaka Factory of Terumo Corporation.
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A comparison of the technological characteristics is summarized on the table below.
| Device Characteristic | New Device:<br>Glidewire® GT | Predicate: Terumo<br>Radifocus Guide<br>Wire (K863138) | Reference predicate:<br>Radifocus Glidewire<br>Advantage<br>(K122590) |
|-----------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Manufacturer | Ashitaka Factory of<br>Terumo Corporation | Same | Same |
| Indication for Use | The Glidewire® GT is<br>designed to direct a<br>catheter to the desired<br>anatomical location in the<br>peripheral vasculature<br>during diagnostic or<br>interventional procedures.<br>This device is not<br>intended for<br>neurovascular or<br>coronary interventions. | The Glidewire is<br>designed to direct a<br>catheter to the desired<br>anatomical location in<br>the vasculature system<br>during diagnostic or<br>interventional<br>procedures. | The Radifocus Glidewire<br>Advantage is designed to<br>direct a catheter to the<br>desired anatomical<br>location in the peripheral<br>vasculature during<br>diagnostic or<br>interventional procedures. |
| Operation Principle | Manual | Same | Same |
| Design/Construction | Core wire is Nickel-<br>Titanium alloy<br><br>Fully hydrophilic coating<br>1) tungsten/polyurethane,<br>2) hydrophilic polymer | Same | Hydrophilic coating,<br>distal:<br>tungsten/polyurethane;<br>proximal: PTFE |
| | Gold coil radiopaque<br>maker | Not available | Same as the subject<br>device |
Table 5.2: Summary of Comparative Information
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| Device Characteristic | New Device:<br>Glidewire® GT | Predicate: Terumo<br>Radifocus Guide<br>Wire (K863138) | Reference predicate:<br>Radifocus Glidewire<br>Advantage<br>(K122590) |
|-----------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| Specifications | • O.D.: 0.014", 0.016",<br>0.018"<br>• Lengths: 180cm,<br>200cm<br>• Tip configuration:<br>Straight and Angled<br>(Angled (45°, 90°),<br>Double Angled, Large<br>curve)<br>• Distal shape<br>processing type:<br>Preshaped, Shapeable | • O.D.: 0.018"-0.052"<br>• Lengths: 30-300cm<br>• Tip configuration:<br>Straight and Angled<br>(including but not<br>limited to 45°, 90°,<br>Double Angled)<br>• Distal shape<br>processing type:<br>Preshaped,<br>Shapeable | • O.D.: 0.014"<br>• Lengths: 180cm,<br>300cm<br>• Tip configuration:<br>Angled (Angled (45°))<br>• Distal shape processing<br>type: Preshaped |
| Package Material | • Individual package<br>Polyester-<br>polyethylene<br>laminated film and<br>paper<br>• Unit box<br>• Shipping carton | Same | Similar<br>Polyester-polyethylene<br>laminated film and<br>Tyvek |
| Sterilization | Ethylene oxide | Same | Same |
| Shelf-life | 24 months | Same | Same |
## H. NON CLINICAL TESTS (807.92(b)(1))
#### Performance
Performance testing was conducted to evaluate the performance of the Glidewire® GT throughout the labeled shelf life, verify conformity to applicable standards and demonstrate substantial equivalence to the predicate devices. With the exception of the Radiodetectability1 test, the following performance tests were performed on nonaged and accelerated-aged Glidewire® GT samples. All samples tested met the applicable acceptance criteria, and no new issues of safety and effectiveness were raised by the testing performed.
<sup>1</sup> Only baseline testing was performed since no change in the radiopacity of the gold markers is anticipated with aging.
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| Test Item | Reference |
|---------------------------------|----------------------------------------------|
| Surface | Sec. 4.3 of ISO 11070: 2014 |
| Radiodetectability2 | Sec. 4.5 of ISO 11070: 2014,<br>ASTM F640-12 |
| Fracture Test | Sec. 8.4 of ISO 11070: 2014 |
| Flexing Test | Sec. 8.5 of ISO 11070: 2014 |
| Peak Tensile Force of guidewire | Sec. 8.6 of ISO 11070: 2014 |
Table 5.3: Performance Testing per ISO Standard
Additionally, performance testing other than that recommended in the above ISO standard was performed on the device in accordance with FDA guidance documents and/or Terumo's in-house standards. The subject device complies with the acceptance criteria established based on the predicate device and/or the FDA guidance documents, as shown in the table below.
| In-house Standards | |
|--------------------------------------------------------------|----------------------------------------------------------------|
| Test Item | Reference |
| Peak Tensile Force of guidewire | 3.a of FDA Guidance3,<br>In-house Standard |
| Torque strength | 3.b of FDA Guidance3,<br>In-house Standard |
| Torqueability | 3.c of FDA Guidance3,<br>In-house Standard |
| Tip flexibility | 3.d of FDA Guidance3,<br>In-house Standard |
| Sliding resistance/Coating integrity<br>(Product appearance) | 3.e of FDA Guidance3,<br>In-house Standard |
| Particulate evaluation | VIII.A.13 of FDA Guidance4,<br>USP <788>,<br>In-house Standard |
| Product dimension | In-house Standard |
| Shaping test | In-house Standard |
Table 5.4: Performance Testing per FDA Guidance Documents and/or In house Standards
Performance testing demonstrated that the Glidewire® GT conformed to the
<sup>2</sup> Only baseline testing was performed since no change to the radiopacity of the gold markers is anticipated with aging.
<sup>3</sup> Coronary and Cerebrovascular Guidewire Guidance, January 1995
<sup>4</sup> Class II Special Controls Guidance Document for Certain Percutaneous Transluminal Coronary Angioplasty (PTCA) Catheters, September 8, 2010
{9}------------------------------------------------
recognized consensus ISO standards, FDA guidance documents or in-house standards, is substantially equivalent to the predicate device for its shelf life.
#### Biocompatibility
In accordance with ISO 10993-1: 2009, Biological evaluation of medical devices – Part 1: Evaluation and testing within a risk management process, the Glidewire® GT is classified as an Externally Communicating Devices, Circulating blood, Limited Contact (<24 hrs). This is the same classification as the predicate Terumo Radifocus Guide Wire (K863138) which is intended for vascular use.
All the blood contacting materials from the subject device are the same as the predicate Terumo Radifocus Guide Wire (K863138) and the Radifocus Glidewire (K152740) which are intended for vascular use. The subject and predicate devices have the same intended use, body contact, and contact duration classification, based on ISO 10993-1: 2009. Additionally, the predicate product lines have a demonstrated histories of safe and effective use in the clinical setting. Therefore, Terumo concludes that the Glidewire® GT is biocompatible for its intended use based on biocompatibility testing leveraged from the predicate device.
#### Sterilization
The device was adopted into an existing sterilization cycle that was validated in accordance with ISO 11135: 2014, Sterilization of health-care products - Ethylene Oxide - Requirements for development, validation and routine control of a sterilization process for medical devices, to provide a Sterility Assurance Level (SAL) of 10-6.
#### Risk Analysis
A Product Risk Analysis was conducted in accordance with ISO 14971: 2007, Medical devices- Application of risk management to medical devices, and no new risks were identified.
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## I. CLINICAL TESTS (807.92(b)(2))
This 510(k) does not include data from clinical tests.
# J. CONCLUSION (807.92(b)(3))
In summary, the Glidewire® GT, subject of this 510(k), is substantially equivalent in its intended use/indications for use, technology/principal of operation, materials, and performance to the predicate device:
- 1. Primary Predicate:
K863138 – Terumo Radifocus Guide Wire, manufactured by Ashitaka Factory of Terumo Corporation
- 2. Reference Predicate:
K122590 - Radifocus Glidewire Advantage manufactured by Ashitaka Factory of Terumo Corporation.
There are no significant differences that raise any new issues of safety and effectiveness.
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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.
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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.
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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?
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.
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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?
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 (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.