The DYNALINK™ .035 Biliary Self-Expanding Stent System is indicated for the palliation of malignant strictures in the biliary tree.
Device Story
The DYNALINK™ .035 Biliary Self-Expanding Stent System is a catheter-based delivery system for a self-expanding nitinol stent. The system features a coaxial catheter design: an inner member compatible with a 0.035" guide wire and an outer member with a distal sheath to constrain the stent and a proximal handle for deployment. The stent is laser-cut from superelastic nitinol, heat-treated for stability, and electropolished with a titanium oxide surface finish. Used in the biliary tree, the device is operated by a physician to deploy the stent across malignant strictures to provide palliation. The system includes radiopaque markers to assist in positioning. The device is provided sterile.
Clinical Evidence
Bench testing only. Safety and effectiveness were demonstrated through in vitro bench tests and analyses.
Indicated for palliation of malignant strictures in the biliary tree. Not for use in the vascular system.
Regulatory Classification
Identification
A biliary catheter and accessories is a tubular flexible device used for temporary or prolonged drainage of the biliary tract, for splinting of the bile duct during healing, or for preventing stricture of the bile duct. This generic type of device may include a bile collecting bag that is attached to the biliary catheter by a connector and fastened to the patient with a strap.
Special Controls
*Classification.* Class II (special controls). The device, when it is a bile collecting bag or a surgical biliary catheter that does not include a balloon component, is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 876.9.
Predicate Devices
DYNALINK™ Biliary Self-Expanding Stent System (K002143)
Submission Summary (Full Text)
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# JUL 1 8 2001
Koll 881
#### 510(k) SUMMARY
The 510(k) Summary is submitted in accordance with 21 CFR Part 807, Section 807.92
| Submitter's Name: | Guidant Corporation<br>Advanced Cardiovascular Systems, Inc. |
|-----------------------------|--------------------------------------------------------------|
| Submitter's Address: | 3200 Lakeside Drive<br>Santa Clara, CA 95052 |
| Telephone:<br>Fax: | 408/845-1067<br>408/845-3743 |
| Contact Person: | Saba Modjarrad |
| Date Prepared: | June 15, 2001 |
| Device Trade Name: | DYNALINK™ .035 Biliary Self-Expanding Stent System |
| Device Common Name: | Biliary Stent |
| Device Classification Name: | Biliary Catheter |
Class II Device Classification:
## Summary of Substantial Equivalence:
The design, materials, method of delivery and intended use features of DYNALINK™ .035 Biliary Self-Expanding Stent System with stents in diameters of 5-10 mm and lengths of 28, 38, and 56 mm are substantially equivalent with regard to these features in the predicate device, the DYNALINK™ Biliary Self-Expanding Stent System (K002143, October 12, 2000).
#### Device Description:
The DYNALINK™ .035 Biliary Self-Expanding Stent System is a catheter designed to deploy a self-expanding nickel titanium (Nitinol) stent into the biliary tree.
The catheter body is constructed from two coaxial members. The inner member (IM) is compatible with a 0.035" guide wire in an over-the-wire configuration. The outer member (OM) is composed of a distal sheath that constrains the unexpanded stent, an outer shaft over most of the catheter length, and a proximal handle used to retract the assembly.
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Koll881 41
The distal end of the delivery system includes the DYNALINK™ Biliary Self-Expanding The distal end of the defreery by steath restraining sheath, a soft, low profile tip, Stellt neid in hs constramod state of the stories and distal ends of the stent. At the and two fault-opaque markers to muleate and present is composed of a pull-back handle proximal end of the dell rery byseeils) it thandle to slide axially, and a luer fitting that is rigidly fixed to the shaped housing.
The DYNALINK™ Biliary Self-Expanding Stent is fabricated from superelastic nickelthe DITATIER - Dimary - Biliary Self-Expanding Stent is comprised of a thamulif (intinor). Things that are aligned along a common longitudinal axis.
The stent is laser cut from a tube of superelastic nitinol. All of the stent diameters are cut rife sicil is its its from a table e stent is expanded and heat-treated to be stable at the with simmal stents patter. The stents are electropolished to obtain a smooth finish with a thin layer of titanium oxide on the surface.
The DYNALINK™ Biliary Self-Expanding Stent is available in diameters of 5-10 mm and in lengths of 28, 38, and 56 mm.
#### Intended Use:
The DYNALINK™ .035 Biliary Self-Expanding Stent System is indicated for palliation of malignant strictures in the biliary tree.
### Technological Characteristics:
Comparisons of the new and predicate devices show that technological characteristics such as materials, biocompatibility, performance properties, sterilization and packaging are substantially equivalent to the currently marketed predicate devices. The design modification of the new biliary stent system compared to that of the predicate biliary stent system is the length of the stent.
#### Performance Data:
The safety and effectiveness of the DYNALINK™ .035 Biliary Self-Expanding Stent System has been demonstrated through data collected from in vitro bench tests and analyses.
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Image /page/2/Picture/1 description: The image is a seal for the Department of Health & Human Services - USA. The seal is circular and contains the words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. In the center of the seal is an image of an eagle with three heads. The eagle is facing to the right and has its wings spread.
#### Public Health Service
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
JUL 1 8 2001
Ms. Saba Modjarrad Regulatory Affairs Coordinator Guidant Corporation Vascular Intervention Group 3200 Lakeside Drive Santa Clara, California 95054
Re: K011881
DYNALINK™ .035 Biliary Self-Expanding Stent System Regulatory Class: II 21 CFR §876.5010 Product Code: 78 FGE Dated: June 15, 2001 Received: June 18, 2001
Dear Ms. Modjarrad:
We have reviewed your Section 510(k) notification of intent to market the device referenced We have reviewed your Section - rots) notifications in the indications for use above and we nave delemined the uevices marketed in interstate comments on to devices th stated in the enclosure) to legally marked precised in one of the Amendments, or to devices that prox to May 26, 1970, the chaolinen date of the Federal Food, Drug, and Cosmetic Act (Act). You may, therefore, market the device, subject to the general controls provisions Cosmetic Act (Act). You may, defectors, marited below. The general cools provisions of the provisions of the Act and the minutures stoons of devices, good manufacturing practice,
Act include requirements for annual registration, list in Act merade requireritions against misbranding and adulteration.
The Office of Device Evaluation has determined that there is a reasonable likelihood that this I he Office of Device Evaluation has detectified in the proposed labeling and that such use device will be used for an michded as the racitiation 513(i)(1)(E) of the Act, the following Could Cause nami." Ear in the Warnings section of the device's labeling:
The safety and effectiveness of this device for use in the vascular system have not been established.
Furthermore, the indication for biliary use must be prominently displayed in all labeling. Furthermore, the Indication for othary ase mast of promotional materials, in
including pouch, box, and carton labels, instructions for use, and other promotional materials, i meluding pouch, oox, and carvere, of a similar point size, and in bold print.
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Page 2 – Ms. Saba Modjarrad
If your device is classified (see above) into either class II (Special Controls) or class III
ng major reass If your device is classified (see above) into cities in controls. Existing major regulations
(Premarket Approval), it may be subject to such additions (Designal Rights Repro (Premarket Approval), it may be subject to such as a such the 21, Parts 800 to 895.
affecting your device can be found in the Code of Federal Regulations, Current Good affecting your device can be found intinues compliance with the Current Good A substantially equivalent decemmants, as set forth in the Quality System Regulation (OS) for Manufacturing Practice requirences, as our 820) and that, through periodic QS
Medical Devices: General regulation (21 CFR Part 820) and that, the accumptions Medical Devices: General regulation (21 CFR Far 020) will verify auch and on mptions. Failure to inspections, the Food and Drug Auministration in addition, FDA may publish .
comply with the GMP regulation may result in regulation. Recess note: this comply with the GMP regulation may result in the Federal Register. Please note: this further announcements concenting your arrants inn does not affect any obligation you might
response to your premarket notification submission the Flectronic Product response to your premarket nonmoution bac.Act for devices under the Electronic Product
have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or regulations.
Radiation Control provisions, of other Federal laws of regard to the market . This The FDA finding of substantial equivalence or your device to proceed to the market. This results in a classification for your device as described in your 510(k) premarket
letter will allow you to begin marketing your device as described letter will anow you to begin marketing your above is added to your labeling, as described.
Please note that the above labeling limitations are required by Section 513(i)(1)(2) of the Act. Please note that the above labeling innitations are required by and the modified in any way or removed from the device's labeling.
If you desire specific information about the application of other labeling requirements to your If you desire specific information about the upplied to the vitro diagnostic devices on the promotion and device (21 CFR Part 801 and additionally 807.10 for questions on the promotion and the Office of Compliance at (301) 394-4010. I Idalaof Compliance at (301) 594-4639. Also,
advertising of your device, please contact the Office of Compliance at (301) 594-46 advertising of your device, prease contier and on by reference to premarket notification's please note the regulation entition, "Albertainments" on the Act may be (21 CFK 9007.97). Other general Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address "http://www.fda.gov/cdrh/dsma/dsmamain.html".
Sincerely yours,
Bernard E. Statland, M.D., Ph.D. Director Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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Page 1 of 1
510(k) Number (if known): K011881
Device Name: DYNALINK™ .035 Biliary Self-Expanding Stent System
FDA's Statement of the Indications For Use for device:
The DYNALINK™ .035 Biliary Self-Expanding Stent System is indicated for the palliation of malignant strictures in the biliary tree.
Brom
(Division Sign-Off)
Division of Reproductive, Abdominal,
and Radiological Devices
510(k) Number
kol1881
Prescription Use V OR (Per 21 CFR 801.109)
Over-The-Counter Use_
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.