Boston Scientific Fighter™, Marvel™, and Samurai™ RC Guidewires are intended to facilitate the placement of balloon dilatation catheters or other interventional therapeutic devices during percutaneous transluminal coronary angioplasty (PTCA) or other intravascular interventional procedures. These guidewires are not intended for use in the cerebral vasculature. Attachment of the Stretch Extension Wire to a Boston Scientific extendable guidewire creates an extended guide wire that can be used to exchange out a percutaneous transluminal coronary angioplasty (PTCA) or percutaneous transluminal angioplasty (PTA) catheter without removing the original guide wire from the artery. When the exchange is complete, the Stretch Extension Wire can be detached and the original guide wire can be used in a conventional manner.
Device Story
Guidewires facilitate placement of interventional coronary devices (balloon catheters, stent delivery systems) during PTCA or intravascular procedures; Stretch Extension Wire allows for catheter exchange without removing the primary guidewire. Devices consist of stainless steel core wire with tapered distal end, proximal stainless steel coil, and distal platinum/nickel radiopaque coil for fluoroscopic visualization. Proximal end features PTFE coating; distal portion features hydrophilic coating. Used in clinical settings by physicians; output is physical guidance of interventional tools through vasculature. Benefits include streamlined catheter exchange and precise device delivery.
Clinical Evidence
No clinical data. Substantial equivalence supported by bench testing including dimensional evaluation, tip flexibility, tensile strength, torque response, coating lubricity/durability, radiodetectability, and extensive biocompatibility testing (cytotoxicity, sensitization, hemocompatibility, thrombogenicity).
Technological Characteristics
Stainless steel core wire; platinum/nickel radiopaque distal coil; PTFE proximal coating; hydrophilic distal coating. 0.014-inch diameter; 190 cm and 300 cm lengths. Straight or J-tip configurations. Sterilized. No software or electronic components.
Indications for Use
Indicated for patients undergoing percutaneous transluminal coronary angioplasty (PTCA) or other intravascular interventional procedures requiring the placement of balloon dilatation catheters or interventional therapeutic devices. Contraindicated for use in the cerebral vasculature.
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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Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo features a stylized depiction of three human profiles facing right, arranged in a cascading manner. The profiles are rendered in black and have a flowing, abstract design. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" is arranged in a circular fashion around the left side of the logo.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
December 16, 2015
Boston Scientific Corporation Nikki M. Wahlberg Senior Regulatory Affairs Specialist One Scimed Place Maple Grove, MN 55311-1566
Re: K151840
Trade/Device Name: Fighter™ Guidewire, Marvel™ Guidewire, Samurai™ Guidewire, Samurai™ RC Guidewire, Stretch™ Extension Wire Regulation Number: 21 CFR 870.1330 Regulation Name: Catheter Guide Wire Regulatory Class: II Product Code: DQX Dated: November 13, 2015 Received: November 16, 2015
Dear Nikki Wahlberg:
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" (21CFR 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,
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) K151840
#### Device Name
Fighter™ Guidewire, Marvel™ Guidewire, Samurai™ Guidewire, and Samurai™ RC Guidewire Stretch Extension Wire
#### Indications for Use (Describe)
Fighter™, Marvel™, Samurai™, and Samurai™ RC Guidewires:
Boston Scientific Fighter™, Marvel™, and Samurai™ RC Guidewires are intended to facilitate the placement of balloon dilatation catheters or other interventional therapeutic devices during percutaneous transluminal coronary angioplasty (PTCA) or other intravascular interventional procedures. These guidewires are not intended for use in the cerebral vasculature.
#### Stretch Extension Wire:
Attachment of the Stretch Extension Wire to a Boston Scientific extendable guidewire creates an extended guide wire that can be used to exchange out a percutaneous transluminal coronary angioplasty (PTCA) or percutaneous transluminal angioplasty (PTA) catheter without removing the original guide wire from the exchange is complete, the Stretch Extension Wire can be detached and the original guide wire can be used in a conventional manner.
| Type of Use (Select one or both, as applicable) | |
|--------------------------------------------------------|--|
| <div style="display:inline-block; width:30px;">☒</div> | |
| <div style="display:inline-block; width:30px;">☐</div> | |
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
per 21 CFR §807.92
| Sponsor: | Boston Scientific Corporation<br>300 Boston Scientific Way<br>Marlborough, Massachusetts 01752<br>USA | | |
|---------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------|---------|-------------|
| Contact Name and<br>Information | Nikki M Wahlberg<br>One Scimed Place<br>Maple Grove, MN 55311-1566<br>Phone: 763-494-2381<br>Fax: 763-494-2981<br>e-mail: Nikki.Wahlberg@bsci.com | | |
| Prepared | 01 July 2015 | | |
| Proprietary Name | Fighter™ Guidewire<br>Marvel™ Guidewire<br>Samurai™ Guidewire<br>Samurai™ RC Guidewire<br>Stretch Extension Wire | | |
| Common Name | Catheter Guide Wire | | |
| Product Code | DQX | | |
| Classification | Class II, 21 CFR Part 870.1330 | | |
| Primary Predicate<br>Device | CholCE™ Guidewire | K143587 | 15 Jan 2015 |
| | AddWire™ Extension Wire | K030617 | 21 May 2003 |
| Reference<br>Device(s) | ASAHI SION blue Guide Wire | K122468 | 08 Mar 2013 |
| | ASAHI X-TREME Guide Wire | K072431 | 26 Sep 2007 |
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## Device Description
The Fighter™, Marvel™, Samurai™, and Samurai™ RC Guidewires are designed to facilitate the placement of interventional coronary devices such as dilating balloon catheters, stent delivery systems and other coronary artery diagnostic or therapeutic devices. The guide wires are available in a nominal diameter of 0.014 inches and nominal lengths of 190 cm and 300 cm. The 190 cm quide wires are compatible exclusively with the Stretch Extension Wire which can extend the quide wire length allowing for exchange of Over-The-Wire systems. The guide wires are composed of a stainless steel core wire which tapers at the distal end. The tapered distal end of the quide wire is covered with a proximal stainless steel coil and a distal platinum/nickel radiopaque coil that allows for visualization while using fluoroscopy. The proximal end of the guide wire contains a polytetrafluoroethylene (PTFE) coating and the distal portion of the wire is coated with a hydrophilic coating. All wires are available in a straight tip configuration. The Marvel and Samurai wires are available in an additional J-tip configuration.
The Stretch Extension Wire is composed of a stainless steel core wire coated with PTFE and contains a hypotube that is compatible with the 190 cm Fighter, Marvel, Samurai, and Samurai RC Guidewires.
## Indications for Use / Intended Use Guide Wire
Boston Scientific Fighter™, Marvel™, Samurai™, and Samurai™ RC Guidewires are intended to facilitate the placement of balloon dilatation catheters or other interventional therapeutic devices during percutaneous transluminal coronary angioplasty (PTCA) or other intravascular interventional procedures. These quidewires are not intended for use in the cerebral vasculature.
## Indications for Use / Intended Use Extension Wire
Attachment of the Stretch Extension Wire to a Boston Scientific extendable quidewire creates an extended guide wire that can be used to exchange out a percutaneous transluminal coronary angioplasty (PTCA) or percutaneous transluminal angioplasty (PTA) catheter without removing the original guide wire from the artery. When the exchange is complete, the Stretch Extension Wire can be detached and the original guide wire can be used in a conventional manner
## Comparison of Technological Characteristics
The Fighter™, Marvel™, Samurai™, and Samurai™ RC Guidewires incorporate substantially equivalent device materials and design, packaging materials and design, fundamental technology, manufacturing processes, sterilization process and intended use as the ChoICE™ Guidewire (K143587).
The Stretch Extension Wire incorporates substantially equivalent device materials and design, packaging materials and design, fundamental technology, manufacturing processes, sterilization process and intended use as the AddWire™ Extension Wire (K030617).
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# Performance Data
Design verification testing was performed to support a determination of substantial equivalence according to Coronary & Cerebrovascular Guide Wire Guidance January 1995 and EN INO 11070. The result of the test provides reasonable assurance that the proposed devices have been designed and tested to assure conformance to the requirements for its intended use. No new safety or performance issues were raised during the testing.
The following performance tests were completed:
| Dimensional Evaluation | Coating Durability | Radiodetectability |
|----------------------------------|----------------------------------|---------------------------------|
| Tip Flexibility | Wire Flex | Particulate Evaluation |
| Tensile | Combined Load | Corrosion Testing |
| Device Compatibility | Torque Response | Exchange Connect |
| Coating Lubricity | Wire Fracture | Exchange Tensile |
| Master Shipping Carton/Condition | Pouch Seal Strength | Carrier Tube Assembly |
| Label Adhesion and Print Quality | Shelf Carton Condition | Withdrawal from Carrier<br>Tube |
| Sterile Barrier Integrity | Visual Sterile Barrier Integrity | |
The following biocompatibility tests were completed:
| Cytotoxicity | Ames Mutagenicity | In vitro Hemocompatibility |
|---------------------------|-----------------------------|-----------------------------------------|
| Sensitization | Mouse Lymphoma | Materials Mediated Pyrogen |
| Intracutaneous Reactivity | Hemolysis Direct Contact | In Vivo Thrombogencity |
| Acute Systemic Injection | Hemolysis Extract Method | USP Physicochemical |
| Natural Rubber Latex | Partial Thromboplastin Time | Complement Activation C3a and<br>SC5b-9 |
{6}------------------------------------------------
## Clinical Testing
Clinical evaluation was not required for this device.
#### Conclusion
Based on the indications for use, technological characteristics, safety and performance testing, the Fighter, Marvel, Samurai, and Samurai RC Guide Wires are appropriate for the stated intended uses and are considered to be substantially equivalent to the ChoICE Guide Wire (K143587) and the Stretch Extension Wire is considered to be substantially equivalent to the AddWire Extension Wire (K030617).
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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.