The device is intended for endoscopic removal of biliary stones. The device is supplied sterile and intended for single use only.
Device Story
Stone Retrieval Balloon is a sterile, single-use endoscopic device for biliary stone removal. It consists of a latex balloon mounted on a 2000mm Pebax catheter with three internal lumens (balloon inflation, wire guide, injection). Radiopaque bands at the balloon ends allow fluoroscopic visualization. The device is operated by a physician during endoscopic procedures. The clinician inserts the catheter, inflates the balloon to a specific diameter (8.5mm to 18mm depending on model) via a proximal stopcock, and uses the inflated balloon to retrieve stones from the bile duct. Rapid exchange models feature a side hole for guide wire insertion. The device facilitates stone extraction, potentially reducing the need for more invasive surgical interventions.
Clinical Evidence
No clinical data included. Substantial equivalence is supported by bench performance testing, including balloon diameter, deflation, and strength testing, alongside biocompatibility (ISO 10993-5, ISO 10993-10) and sterility (ISO 11135) validation.
Indicated for endoscopic removal of biliary stones in patients requiring biliary stone extraction.
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
Tri-Ex Extraction Balloon With Multiple Sizing (K170292)
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Image /page/0/Picture/0 description: The image contains the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health & Human Services USA seal. To the right of the seal is a blue square with the letters "FDA" in white. To the right of the blue square is the text "U.S. FOOD & DRUG ADMINISTRATION" in blue.
May 1, 2020
Hangzhou AGS MedTech Co., Ltd. Chunqi Han R&D Director Building 5, Building 6, No.597 Kangxin Road Yuhang District Hangzhou, 311106 CHINA
K200173 Re: Trade/Device Name: Stone Retrieval Balloon Regulation Number: 21 CFR 876.5010 Regulation Name: Biliary catheter and accessories Regulatory Class: II Product Code: GCA Dated: January 21, 2020 Received: January 23, 2020
Dear Chunqi Han:
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. 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
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(21 CFR Part 801); medical device reporting (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 G. Walter, Jr. 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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# Indications for Use
510(k) Number (if known) K200173
Device Name Stone Retrieval Balloon
Indications for Use (Describe)
The device is intended for endoscopic removal of biliary stones. The device is supplied sterile and intended for single use only.
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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## 510(k) Summary
We submit this 510(k) Summary as per 21 CFR 807.92, it meets the content and format regulatory requirements.
## 5.1 Submitter
| Submitted by/Owner: | Hangzhou AGS MedTech Co., Ltd.<br>Building 5, Building 6, NO.597 Kangxin Road Yuhang<br>District, Hangzhou, Zhejiang 311106 China |
|---------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------|
| Establishment<br>Registration Number: | 3010288205 |
| Registration Status: | Active |
| Contact Person: | Yanping Fu<br>Phone: 0086-15958493282<br>Fax: 0086-0571-87671225<br>Email: fuyp@bioags.com |
| Date Prepared: | July 18, 2019 |
## 5.2 Proposed Device
| Trade Name: | / |
|-------------------------|-------------------------------------------------------------------------------------------------|
| Device Name: | Stone Retrieval Balloon |
| Common Name: | Stone Retrieval Balloon |
| Regulation class: | Class II |
| Regulation Number: | 876.5010 |
| Regulation Description: | Biliary Catheter and Accessoriess |
| Review Panel: | Gastroenterology/Urology |
| Product Code: | GCA |
| Product Code Name: | Biliary Catheter For Stone Removal That May Also<br>Allow For Irrigation And Contrast Injection |
# 5.3 Predicate Device
| Trade Name: | Tri-Ex Extraction Balloon With Multiple Sizing |
|-------------------------|-------------------------------------------------------------------------------------------------|
| Device Name: | Tri-Ex Extraction Balloon With Multiple Sizing |
| Common Name: | Extraction Balloon With Multiple Sizing |
| 510(k) Number: | K170292 |
| Regulation class: | Class II |
| Regulation Number: | 876.5010 |
| Regulation Description: | Biliary Catheter and Accessoriess |
| Review Panel: | Gastroenterology/Urology |
| Product Code: | GCA |
| Product Code Name: | Biliary Catheter For Stone Removal That May Also Allow<br>For Irrigation And Contrast Injection |
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| Trade Name: | Single Use 3-Lumen Extraction Balloon V |
|-------------------------|---------------------------------------------------------------------------------|
| Device Name: | Single Use 3-Lumen Extraction Balloon V |
| Common Name: | 3-Lumen Extraction Balloon |
| 510(k) Number: | K091495 |
| Regulation class: | Class II |
| Regulation Number: | 876.5010 |
| Regulation Description: | Biliary Catheter and Accessoriess |
| Review Panel: | Gastroenterology/Urology |
| Product Code: | FGE/LQR |
| Product Code Name: | Stents, Drains And Dilators For The Biliary Ducts/<br>Dislodger, Stone, Biliary |
### 5.4 Device Description
The subject Stone Retrieval Balloon is comprised of a latex balloon mounted at the distal end of a Pebax catheter with three internal lumens. For some models, the balloon can be inflated to 8.5mm, 12mm, 15mm and 18mm only. But for some models, the balloon can be inflated to three sizes, 8.5 mm, 12 mm and 15 mm diameters, or 13mm, 15mm and 18mm. Radiopaque bands placed at the distal and proximal ends of the balloon provide fluoroscopic visualization of the balloon location. The catheter length is 2000mm with a outer diameter of 2.4mm. The three lumens correspond to a balloon inflation port, a wire guide port and an injection port. A stopcock is included at the proximal end of the balloon inflation port to control air movement into or out of the balloon. For rapid exchange models, there is a small hole on the catheter which is about 200mm far away from the distal end, it is used to insert the guide wire rapidly. EO Sterilization and use for single use only.
#### 5.5 Indication for use statement
The device is intended for endoscopic removal of biliary stones. The device is supplied sterile and intended for single use only.
#### 5.6 Comparison of Technology Characteristics
Our proposed device Stone Retrieval Balloon is substantially equivalent to the predicate devices. The differences between the Stone Retrieval Balloon and the predicate devices do not raise any questions regarding its safety and effectiveness. The differences are listed in the table below
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| Difference Item | | Proposed device | Predicate device | Comparison |
|--------------------------------------------------|---------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Common name | | Stone Retrieval Balloon | Tri-Ex Extraction Balloon with<br>Multiple Sizing | / |
| Trade name | | / | Tri-Ex Extraction Balloon with<br>Multiple Sizing | / |
| Model number | | 5051 series, 5053 series, 5451series, 5453 series | TXR-8.5-12-15-A | / |
| 510(k) submitter | | Hangzhou AGS MedTech Co., Ltd. | Wilson-Cook Medical, Inc. | / |
| 510(k) number | | / | K170292 | / |
| Technical | Balloon<br>Max outer<br>diameter | 8.5/12/15/18/8.5-12-15/13-15-18mm | 8.5 mm, 12 mm and 15mm | Different.<br>Our balloon outer diameter includes a range from 8.5mm to<br>18mm, the predicate device includes a range from 8.5mm to<br>15mm. For the 18mm balloon, we provide the following<br>support evidence to demonstrate that it will not raise different<br>questions regarding its safety and effectiveness.<br>First, we searched in the FDA 510k Premarket Notification<br>database for other similar retrieval<br>balloon catheter, and we found Olympus's 3-Lumen<br>Extraction Balloon (K091495), maximum diameter of the<br>balloon(mm) is 20mm, it is shown in the 510(k) summary:<br>Second, there is a literature that retrieval balloon catheter is<br>used to remove stones in the bile duct which the mean<br>common bile duct (CBD) dilation was 19.2mm±3.9 and the<br>mean size of stones 15.8±2.9. |
| Difference Item | Proposed device | Predicate device | Comparison | |
| Recommended<br>Wire<br>Guide<br>Diameter<br>inch | 0.035 /0.025ich | 0.035ich | Different. Our proposed device has another option for wire<br>guide, the difference don't raise question about safety and<br>effectiveness. | |
| Performance | Balloon Diamater, Balloon Deflation, Balloon<br>Strength, etc. | Balloon Diameter, Balloon Deflation,<br>Balloon Strength, etc. | Different.<br>We conduct bench performance for our proposed device and<br>the predicate device, please refer to Section 18 of this<br>submission, the test results show that our proposed device is<br>substantial equivalence with the predicate device. | |
| Biological | Materials<br>or<br>substances<br>in contact<br>with the<br>same<br>human<br>tissue or<br>body<br>fluids | Sheath: Pebax;<br>Radiopaque band: Tal;<br>Bind wire: PET;<br>Latex balloon: Natural latex;<br>Binder: UV-curing adhesive;<br>Marker: Polyurethane ink. | Catheter: nylon;<br>Balloon: Latex. | Different.<br>Biocompatibility tests have been done for the difference.<br>Biological risks are acceptable. |
| | Biocompatibility | In Vitro Cytotoxicity Test : ISO 10993-5: 2009;<br>Skin sensitization Test : ISO 10993-10: 2010;<br>Intracutaneous Reactivity Test: ISO 10993-10: 2010; | Unknown | |
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5.7 Applicable Guidance Document NA
#### 5.8 Performance Data
The Stone Retrieval Balloon meets all design specifications and medical for biocompatibility (ISO 1099) and sterility (ISO 11135). The non-clinical performance meets the design specification and shows substantial equivalence to the predicated device.
### 5.9 Clinical Test
No Clinical test is included in this submission.
#### 5.10 Conclusion
In accordance with the Federal Food, Drug and Cosmetic Act, 21 CFR Part 807, Based on the information provided in this premarket notification, Hangzhou AGS Medtech Co., Ltd has demonstrated that proposed device Electrosurgical System is substantially equivalent to the predicate devices.
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.