The Stonetome Stone Removal Device is indicated for use in diagnostic or therapeutic endoscopic retrograde cholangiopancreatography (ERCP), transendoscopic sphincterotomy of the Papilla of Vater and/or the Sphincter of Oddi, to remove stones from the biliary system, and to facilitate injection of contrast medium while occluding the duct with the balloon.
Device Story
Triple-lumen catheter (200 cm, 7F to 5.5F) incorporating sphincterotome and latex retrieval balloon; used during ERCP. Physician operates device through duodenoscope. Guidewire inserted into one lumen; balloon inflated via second lumen. Monopolar electrosurgical generator delivers current to cutting wire to incise Papilla of Vater/Sphincter of Oddi. Balloon passed beyond biliary stone, inflated, and withdrawn to facilitate stone removal. Enables contrast medium injection while occluding duct. Benefits patient by providing minimally invasive method for biliary stone extraction and sphincterotomy.
Clinical Evidence
Bench testing only. Testing included balloon inflation (OD and leakage), simulated stone retrieval, and balloon distensibility. Biocompatibility testing (cytotoxicity, irritation, sensitization, acute systemic toxicity) performed per ISO 10993-1:2009. All acceptance criteria met.
Technological Characteristics
Triple-lumen catheter (7F to 5.5F); latex retrieval balloon; monopolar electrosurgical cutting wire. Compatible with 0.035 in guidewire. Biocompatibility per ISO 10993-1. Sterilization method not specified.
Indications for Use
Indicated for patients undergoing diagnostic or therapeutic ERCP requiring transendoscopic sphincterotomy of the Papilla of Vater or Sphincter of Oddi, biliary stone removal, or ductal occlusion for contrast injection.
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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July 25, 2019
Boston Scientific Corporation Laura Kuroski Senior Regulatory Affairs Specialist 100 Boston Scientific Way Marlborough, Massachusetts 01752
Re: K191789
Trade/Device Name: Stonetome Stone Removal Device Regulation Number: 21 CFR 876.5010 Regulation Name: Biliary Catheter and Accessories Regulatory Class: Class II Product Code: LQR Dated: July 2, 2019 Received: July 3, 2019
# Dear Laura Kuroski:
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. 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 located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. However, you are responsible to determine that the medical devices you use as components in the kit have either been determined as substantially equivalent under the premarket notification process (Section 510(k) of the act), or were legally on the market prior to May 28, 1976, the enactment date of the Medical Device Amendments. Please note: If you purchase your device components in bulk (i.e., unfinished) and further process (e.g., sterilize) you must submit a new 510(k) before including these components in your kit/tray. 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.
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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 of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; 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 https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-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/medicaldevices/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-device-advice-comprehensive-regulatoryassistance/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,
Daniel Walter Assistant Director DHT3A: Division of Renal, Gastrointestinal, Obesity and Transplant Devices OHT3: Office of Gastrorenal, ObGyn, General Hospital and Urology Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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| DEPARTMENT OF HEALTH AND HUMAN SERVICES | Form Approved: OMB No. 0910-0120 |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------|
| Food and Drug Administration | Expiration Date: 06/30/2020 |
| Indications for Use | |
| 510(k) Number (if known) | |
| Device Name | |
| Stonetome Stone Removal Device | |
| Indications for Use (Describe) | |
| The Stonetome Stone Removal Device is indicated for use in diagnostic or therapeutic endoscopic retrograde cholangiopancreatography (ERCP), transendoscopic sphincterotomy of the Papilla of Vater and/or the Sphincter of Oddi, to remove stones from the biliary system, and to facilitate injection of contrast medium while occluding the duct with the balloon. | |
| Type of Use (Select one or both, as applicable) | |
| <label><input checked="true" type="checkbox"/> Prescription Use (Part 21 CFR 801 Subpart D)</label> | <label><input type="checkbox"/> Over-The-Counter Use (21 CFR 801 Subpart C)</label> |
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FORM FDA 3881 (7/17) WITH THE STONETOME STONE REMOVAL DEVICE. THE CHECKBOX FOR PRESCRIPTION USE IS CHECKED. THE CHECKBOX FOR OVER-THE-COUNTER USE IS NOT CHECKED.
Special 510(k) Premarket Notification Stonetome™ Stone Removal Device
Proprietary and Confidential Information of Boston Scientific Corporation
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Boston Scientific Corporation 300 Boston Scientific Way Marlborough, MA 01752-1234 (508) 683-4000
www.bostonscientific.com
## 1. Submitter
Boston Scientific Corporation 100 Boston Scientific Way Marlborough, MA 01752
Laura Kuroski Contact: Sr. Regulatory Affairs Specialist Telephone: (508) 683-4406 Laura.Kuroski@bsci.com E-mail:
Date Prepared: July 2, 2019
#### 2. Proposed Device
| Trade Name: | Stonetome Stone Removal Device |
|----------------------------|------------------------------------|
| Common Name: | Biliary Stone Dislodger |
| Product Code: | LQR |
| Device Class and Panel: | Class II, Gastroenterology/Urology |
| Classification Regulation: | 21 CFR 876.5010 |
#### 3. Predicate Device
| Trade Name: | Endoscopic Biliary Catheter |
|----------------------------|------------------------------------|
| Manufacturer: | Boston Scientific Corporation |
| Clearance Number: | K946358 |
| Common Name: | Biliary Stone Dislodger |
| Product Code: | LQR |
| Device Class and Panel: | Class II, Gastroenterology/Urology |
| Classification Regulation: | 21 CFR 876.5010 |
### 4. Device Description
The Stonetome Stone Removal Device is a 200 cm tapered 7F (2.3 mm) to 5.5F (1.8 mm) triple lumen catheter that incorporates a sphincterotome with a latex retrieval balloon. The Stonetome Stone Removal Device is available in several configurations: (1) with the latex balloon mounted distal or proximal to the cutting wire, (2) with a 20- or 30-mm wire, and (3) with a 5 mm or 20 mm distal tip. See Stonetome Stone Removal Device configuration summary table below:
| UPN* | Mounted Balloon Location | Distal Tip Length | Cut Wire Length | | |
|-----------|---------------------------|-------------------|-----------------|--|--|
| M00535110 | Above Cut Wire (Distal) | 20mm Long Nose | 20mm Cut Wire | | |
| M00535130 | Above Cut Wire (Distal) | 20mm Long Nose | 30mm Cut Wire | | |
| M00535150 | Below Cut Wire (Proximal) | 5mm Short Nose | 20mm Cut Wire | | |
| M00535170 | Below Cut Wire (Proximal) | 20mm Long Nose | 20mm Cut Wire | | |
| M00535190 | Below Cut Wire (Proximal) | 5mm Short Nose | 30mm Cut Wire | | |
| M00535210 | Below Cut Wire (Proximal) | 20mm Long Nose | 30mm Cut Wire | | |
#### Stonetome Stone Removal Device Configurations Table
*Note: Bolded numbers within UPN are Catalog Numbers referenced within predicate 510(k), K946358
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The Stonetome Stone Removal Device is capable of accepting a 0.035 in (0.89 mm) guidewire in one lumen while inflating the balloon via a second lumen. When connected to a monopolar electrosurgical generator, passed through a duodenoscope and activated, it will deliver a monopolar current to incise the Papilla of Vater and/or the Sphincter of Oddi. After sphincterotomy, the balloon may be passed beyond the stone, inflated, and withdrawn to remove the stone.
# 5. Indications for Use
The Stonetome Stone Removal Device is indicated for use in diagnostic or therapeutic endoscopic retrograde cholangiopancreatography (ERCP), transendoscopic sphincterotomy of the Papilla of Vater and/or the Sphincter of Oddi, to remove stones from the biliary system, and to facilitate injection of contrast medium while occluding the duct with the balloon.
# 6. Technological Characteristics
The modified Stonetome Stone Removal Device shares the same intended use, indications for use, and fundamental scientific technology as the predicate Endoscopic Biliary Catheter (K946358), (the current trade name had not been finalized at the time of the original submission). The modified device and the predicate device share nearly identical technological characteristics, with the modified device incorporating new retrieval balloon material.
## 7. Performance Data
Non-clinical testing was successfully performed on the modified Stonetome Stone Removal Device.
Performance testing (bench) was successfully completed to establish substantial equivalence between the modified Stonetome Stone Removal Device and the predicate device. This testing included the following:
- Balloon Inflation (OD) ●
- Balloon Inflation (Leakage)
- Simulated Stone Retrieval ●
- . Balloon Distensibility
Biocompatibility of the Stonetome Stone Removal Device was evaluated in accordance with a risk management process. ISO 10993-1:2009 Biological evaluation of medical devices Part 1: Evaluation and the FDA Guidance for Industry and Food and Drug Administration Staff titled Use of International Standard ISO 10993-1. "Biological evaluation of medical devices - Part 1: Evaluation and testing within a risk management process" dated June 16, 2016. The following tests were performed: Cytotoxicity, Irritation, Sensitization, and Acute Systemic Toxicity. All acceptance criteria were met.
The results of non-clinical testing demonstrate that the modified Stonetome Stone Removal Device is considered safe and effective for its intended use.
## 8. Conclusion
The modified Stonetome Stone Removal Device met all acceptance criteria for design verification as specified by applicable standards, guidance, and test protocols. Boston Scientific has demonstrated that the modified Stonetome Stone Removal Device is substantially equivalent to the predicate Endoscopic Biliary Catheter (K946358).
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.