Polypectomy Snare is used endoscopically in the removal of diminutive polyps, pedunculated polyps and tissue from within the GI tract.
Device Story
Polypectomy snare is a single-use endoscopic instrument; consists of handle, sheath, flexible wire, and electrode. Used by clinicians during endoscopic procedures to remove GI tract polyps. Device passed through endoscope; electrode extends/retracts from sheath to capture tissue. Monopolar RF energy delivered via electrode to cut and cauterize tissue. Rotary models feature handle-based rotation actuator for cable/snare positioning. Available in five electrode shapes: Oval, Polygon, Duck Bill, Hexagonal, and Round. Sterile, single-use device; no animal/human origin substances.
Clinical Evidence
No clinical data. Bench testing only, including biocompatibility (ISO 10993-5, ISO 10993-10) and performance testing (appearance, size, material, usability, electrical properties).
Technological Characteristics
Components: handle, sheath, flexible wire, electrode. Energy: Monopolar RF. Electrode shapes: Oval, Polygon, Duck Bill, Hexagonal, Round. Features: Rotary and non-rotary specifications. Biocompatibility: ISO 10993-1, ISO 10993-5, ISO 10993-10. Sterilization: Sterile, single-use.
Indications for Use
Indicated for endoscopic removal of diminutive, sessile, and pedunculated polyps and tissue from the GI tract.
Regulatory Classification
Identification
An endoscopic electrosurgical unit and accessories is a device used to perform electrosurgical procedures through an endoscope. This generic type of device includes the electrosurgical generator, patient plate, electric biopsy forceps, electrode, flexible snare, electrosurgical alarm system, electrosurgical power supply unit, electrical clamp, self-opening rigid snare, flexible suction coagulator electrode, patient return wristlet, contact jelly, adaptor to the cord for transurethral surgical instruments, the electric cord for transurethral surgical instruments, and the transurethral desiccator.
Predicate Devices
Captivator II, Single-Use Polypectomy Snares (K133987)
Submission Summary (Full Text)
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May 21, 2018
Hangzhou AGS MedTech CO., Ltd % Ethan Liu RA Specialist Shanghai Thinkwell Consulting Co., Ltd. Xin Ling Road, 211/6F Shanghai, 201100 China
Re: K172729
Trade/Device Name: Polypectomy Snare Regulation Number: 21 CFR§ 876.4300 Regulation Name: Endoscopic electrosurgical unit and accessories Regulatory Class: II Product Code: FDI Dated: April 13, 2018 Received: April 20, 2018
Dear Ethan Liu:
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)
K172729
Device Name Polypectomy Snare
Indications for Use (Describe)
Polypectomy Snare is used endoscopically in the removal of diminutive polyps, pedunculated polyps and tissue from within the GI tract.
| Type of Use (Select one or both, as applicable) | <span> <span style="margin-right: 5px;">☑</span> Prescription Use (Part 21 CFR 801 Subpart D) </span> <span> <span style="margin-right: 5px;">☐</span> Over-The-Counter Use (21 CFR 801 Subpart C) </span> |
|-------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|-------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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#### 510(k) Summary
This summary of 510(k) safety and effectiveness information is being submitted in accordance with requirements of 21 CFR Part 807.92.
# 5.1 Submitter
| Submitted by: | Hangzhou AGS MedTech CO., Ltd.<br>Building 6, Kangxin Road No.597, Qianjiang<br>Economic Development Area , Hangzhou ,<br>Zhejiang , 311106, China |
|---------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------|
| Establishment<br>Registration Number: | 3010288205 |
| Owner/Operator<br>Number: | 10052959 |
| Contact Person: | Ethan Liu<br>Phone:0086-15216699240<br>Fax: 0086-21-60732022<br>Email:xtdeepwater@126.com |
| Date Prepared: | Jan 18, 2017 |
#### 5.2 Device
| Device Name: | Polypectomy Snare |
|--------------------|-------------------------------------------------|
| Common Name: | Polypectomy Snare |
| Regulatory Class: | Class II |
| Regulation Number | 876.4300 |
| Product Code Name: | Snare, Flexible |
| Regulation Name: | Endoscopic electrosurgical unit and accessories |
| Product Code: | FDI |
# 5.3 Predicate Device
| Device Name: | Single Use Polypectomy Snares<br>Captivator II, Single-Use Polypectomy Snares<br>K133987 |
|--------------------|------------------------------------------------------------------------------------------|
| Common Name: | Polypectomy Snare |
| Regulatory Class: | Class II |
| Regulation Number | 876.4300 |
| Product Code Name: | Snare, Flexible |
| Regulation Name: | Endoscopic electrosurgical unit and accessories |
| Product Code: | FDI |
# 5.4 Device Description
The polypectomy snare consists of handle, sheath, flexible wire and electrode that is used to remove polys utilizing monopolar RF energy under endoscopic visualization.
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Image /page/4/Picture/0 description: The image contains a logo with a circular design on the left and text on the right. The circular design consists of three curved shapes in blue and green, arranged in a triangular pattern. To the right of the logo, there is text in two lines, with the first line reading "AGS MEDTECH" in English. The second line contains Chinese characters, which translate to "An Jie Si Medical".
K172729 Page 2 of 3
The rotary snares' cable and polypectomy can be rotated using the rotation actuator on the handle.
Polypectomy snare is sterile for single use with no delayed hypersensitivity and no intracutaneous reactivity, have no animal or human origin substance.
The electrode of polypectomy snare has five shapes to be used in clinical practice: Oval, Polygon, Duck Bill, Hexagonal and Round, and the electrode can extend, retract from the snare's flexible outer sheath.
#### 5.5 Indication for Use:
Polypectomy Snare is used endoscopically in the removal of diminutive polyps, sessile polyps, pedunculated polyps and tissue from within the GI tract.
#### 5.6 Technology Characteristics
The polypectomy snare consists of handle, sheath, flexible wire and electrode, which are used endoscopically in the removal of diminutive polyps, sessile polyps, pedunculated polyps and tissue from within the GI tract. When passed through an endoscope and activated, the snare delivers a monopolar electrical current to cut and cauterize tissue with the electrode.
The proposed device contain both rotary and non-rotary specifications, the rotary snares' cable and polypectomy can be rotated using the rotation actuator on the handle, the main differences of these specifications are dimension.
# 5.7 Applicable Guidance Document
Guidance for the Content of Premarket Notifications for Biopsy Devices Used in Gastroenterology and Urology
# 5.8 Substantial Equivalence
Captivator II, Single-Use Polypectomy Snare(Boston Scientific Corporation, K133987) is used as predicate device compared to proposed device Polypectomy Snare manufactured by Hangzhou MedTech Co., Ltd.
#### 5.9 Performance Data
# 5.9.1 Biocompatibility Testing
The biocompatibility evaluation for this device was conducted in accordance with the FDA Bluebook Memorandum G95-1 "Use Of International Standard ISO-10993, 'Biological Evaluation Of Medical Devices Part 1: Evaluation And Testing.'" and the International Standard ISO 10993-1 Fourth Edition 2009-10-15, Biological Evaluation Of Medical Devices - Part 1: Evaluation And Testing Within A Risk Management Process [Including: Technical Corrigendum 1 (2010)], as recognized by FDA.
| Biocompatibility<br>Test | Standards | Test Result | Verdict |
|--------------------------|-----------|-------------|---------|
|--------------------------|-----------|-------------|---------|
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Section 5 510(k) Summary Polynectomy Snari
| In<br>Cytotoxicity | Vitro ISO 10993-5:2009 | No cytotoxicity observed. | Pass |
|----------------------------------|------------------------|------------------------------|------|
| Delayed-type<br>Hypersensitivity | ISO 10993-10:2010 | No hypersensitivity observed | Pass |
| Irritation | ISO 10993-10:2010 | No irritation observed | Pass |
# 5.8.2 Performance Testing
The following bench tests were performed on Polypectomy snare: Appearance, Size, Material, Usability, Electric property. The results of all testing were passing.
# 5.9 Clinical Test Conclusion
No Clinical Study is included in this submission.
#### 5.11 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 Polypectomy Snare is substantially equivalent to Boston Scientific Corporation's currently marketed Captivator II, Single-Use Polypectomy Snares(K133987).
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.