Web II Memory Extraction Basket or Memory II Double Lumen Extraction Basket, Memory 5 Fr. Soft Wire Baskets or Memory Helical Stone Extractor, Memory Eight Wire Baskets or Memory Hard Wire Baskets, Fusion Wire Guided Extraction Basket, Non-Lithotripsy Extraction Basket
K171969 · Wilson-Cook Medical, Inc. · LQR · Mar 28, 2018 · Gastroenterology, Urology
Device Facts
Record ID
K171969
Device Name
Web II Memory Extraction Basket or Memory II Double Lumen Extraction Basket, Memory 5 Fr. Soft Wire Baskets or Memory Helical Stone Extractor, Memory Eight Wire Baskets or Memory Hard Wire Baskets, Fusion Wire Guided Extraction Basket, Non-Lithotripsy Extraction Basket
Applicant
Wilson-Cook Medical, Inc.
Product Code
LQR · Gastroenterology, Urology
Decision Date
Mar 28, 2018
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 876.5010
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
Endoscopic removal of stones in the biliary system and foreign bodies.
Device Story
Non-Lithotripsy Extraction Basket is a sterile, single-use device for endoscopic removal of biliary stones and foreign bodies. Device comprises a basket, catheter, and handle. Basket, made of monofilament or multifilament metal wires, is advanced from and retracted into a polytetrafluoroethylene (PTFE) catheter sheath via a handle-mounted actuator. Used in clinical settings by physicians during endoscopic procedures. Device is inserted through the accessory channel of an endoscope. Physician manipulates the handle to deploy the basket, capture the stone or foreign body, and withdraw it. Benefits include minimally invasive retrieval of biliary obstructions. Device is not compatible with mechanical lithotripters.
Clinical Evidence
Bench testing only. Testing included stone and foreign body capture, tensile testing, flexibility testing, and post-aging functional testing. Biocompatibility, sterilization, and shelf-life validation were also performed.
Technological Characteristics
Sterile, single-use biliary catheter. Components: metal wire basket (monofilament/multifilament), PTFE catheter sheath, handle actuator. Mechanical operation via manual handle manipulation. Dimensions and materials vary by model. Not compatible with mechanical lithotripsy. No software or electronic components.
Indications for Use
Indicated for endoscopic removal of stones in the biliary system and foreign bodies in patients requiring such procedures.
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.
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March 28, 2018
Wilson-Cook Medical, Inc. Ashley Howard Specialist I - Regulatory Affairs 4900 Bethania Station Road Winston-Salem, NC 27105
Re: K171969
Trade/Device Name: Web II Memory Extraction Basket or Memory II Double Lumen Extraction Basket, Memory 5 Fr. Soft Wire Baskets or Memory Helical Stone Extractor, Memory Eight Wire Baskets or Memory Hard Wire Baskets, Fusion Wire Guided Extraction Basket. Non-Lithotripsy Extraction Basket Regulation Number: 21 CFR§ 876.5010 Regulation Name: Biliary Catheter and Accessories
Regulatory Class: II Product Code: LOR Dated: February 13, 2018 Received: February 14, 2018
Dear Ashley Howard:
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.
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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 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.
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.
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/MedicalDevices/DeviceRegulationandGuidance/) and CDRH Learn (http://www.fda.gov/Training/CDRHLearn). 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 (http://www.fda.gov/DICE) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Joyce M. Whang -S
for
Benjamin R. Fisher, Ph.D. Director Division of Reproductive, Gastro-Renal, and Urological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use
#### 510(k) Number (if known)
K171969
#### Device Name
Web II Memory Extraction Basket or Memory II Double Lumen Extraction Basket, Memory 5 Fr. Soft Wire Baskets or Memory Helical Stone Extractor, Memory Eight Wire Baskets or Memory Hard Wire Guided Extraction Basket, Non-Lithotripsy Extraction Basket
#### Indications for Use (Describe)
Endoscopic removal of stones in the biliary system and foreign bodies.
| Type of Use (Select one or both, as applicable) | |
|-------------------------------------------------|--|
| | |
X | Prescription Use (Part 21 CFR 801 Subpart D)
| | Over-The-Counter Use (21 CFR 801 Subpart C)
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# Non-Lithotripsy Extraction Basket
510(k) Premarket Notification June 30, 2017
# Applicant Information
| Applicant: | Wilson-Cook Medical, Inc. / Cook Endoscopy<br>4900 Bethania Station Road<br>Winston-Salem, North Carolina 27105 |
|------------|-----------------------------------------------------------------------------------------------------------------|
| Contact: | Ashley Howard, Specialist I – Regulatory Affairs |
| Phone: | (336) 744-0157 ext. 6174 |
| Fax: | (336) 201-5994 |
### Device Information
| Trade Name: | Web II Memory Extraction Basket or Memory II Double Lumen Extraction Basket, Memory 5 Fr. Soft Wire Baskets or Memory Helical Stone Extractor, Memory Eight Wire Baskets or Memory Hard Wire Baskets, Fusion Wire Guided Extraction Basket, Non-Lithotripsy Extraction Basket |
|----------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Common Name: | Dislodger, Stone, Biliary |
| Classification Name: | Biliary Catheter and Accessories |
| Regulation Number: | 21 CFR 876.5010 |
| Product Code: | LQR |
| Device Class: | Class II |
| Review Panel: | Gastroenterology-Urology |
### Predicate Device
| Name: | Wilson-Cook Stone Extractor |
|----------------|-----------------------------|
| 510(k) Number: | K851965 |
| Date: | Cleared July 29, 1985 |
### Device Description
The Non-Lithotripsy Extraction Basket is a sterile, single use device compatible with the accessory channel of endoscopes. The device consists of basket, catheter, and handle components. The basket component is constructed of monofilament or multifilament metal wires joined at the distal and proximal ends, and is advanced out of and retracted into the single or double lumen polytetrafluoroethylene catheter sheath using the handle component's actuator. The device is not compatible with any mechanical lithotripter.
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K171969
### Intended Use
Endoscopic removal of stones in the biliary system and foreign bodies.
# Comparison to Predicate Device
The Non-Lithotripsy Extraction Basket has the same principles of operation and fundamental technologies as the predicate device. Changes to the subject device include labeling to incorporate the addition of Instructions for Use with contraindications, dimensions, materials, handle configuration, and an expanded indication for use. These changes do not raise new questions of safety or effectiveness.
# Performance Data and Non-Clinical Testing
Performance testing consisting of sterilization, shelf life, biocompatibility, and nonclinical bench testing demonstrate that the Non-Lithotripsy Extraction Basket meets the performance criteria required to fulfill the intended use of the device. The following summarizes the non-clinical bench testing conducted:
- Stone and Foreign Body Capture Testing ●
- . Tensile Testing
- Flexibility Testing
- Post-Aging Functional Testing ●
### Conclusion
We believe the risks associated with the modifications to the subject device were adequately addressed through our Design Control Processes and do not affect safety or effectiveness of the device. The information and data contained in this notification supports a determination of substantial equivalence.
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.