The Polypectomy Snares are used endoscopically in the removal of diminutive polyps, sessile polyps, and pedunculated polyps from within the GI tract.
Device Story
Polypectomy Snare is a sterile, single-use endoscopic device; consists of flexible wire cable and loop extending/retracting from flexible outer sheath via handle. Used by physicians during endoscopic procedures. Device passed through endoscope; loop placed around polyp; monopolar electrical current delivered to cut and cauterize tissue. Enables removal of polyps from GI tract; benefits patient by facilitating minimally invasive tissue excision. Eighteen specifications vary by dimension and loop rotation capability.
Clinical Evidence
No clinical data; bench testing only. Performance verified via non-clinical tests including electrode contact impedance, cutting, pushability, and tensile strength. Biocompatibility confirmed per ISO 10993-5, ISO 10993-10, and USP <151>. Sterilization validated to SAL 10^-6.
Technological Characteristics
Materials: Stainless steel SUS304 (with Dow Corning MDX4-4159 dispersion) and PTFE. Energy: Monopolar radio frequency. Form factor: Flexible wire cable/loop with outer sheath and handle. Connectivity: None. Sterilization: Ethylene Oxide (EO). Standards: ASTM F88, F1929, F1140, F1886, F1980; IEC 60601-2-18, 60601-2-2; ANSI/AAMI HF18, ES60601-1; ISO 11737-1, 10993-5, 10993-7, 10993-10; USP <71>, <85>.
Indications for Use
Indicated for endoscopic removal of diminutive, sessile, and pedunculated polyps within 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.
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
July 30, 2015
Micro-Tech (Nanjing) Co., Ltd. Becky Li Manager of Quality Department No. 10 Gaoke Third Road Nanjing, Jiangsu 210032 China
Re: K150316
> 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: June 15, 2015 Received: June 22, 2015
Dear Becky Li,
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. 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 (reporting of medical device
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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.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. 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.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours,
Benjamin R. Fisher, Ph.D. for 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) K150316
Device Name Polyhpectomy Snare
Indications for Use (Describe)
The Polypectomy Snares are used endoscopically in the removal of diminutive polyps, and pedunculated polyps within the GI tract.
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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Image /page/3/Picture/1 description: The image shows the logo for MICRO-TECH. The logo consists of the letters "MT" in a stylized, three-dimensional font, with the words "MICRO-TECH" written to the right of the letters. Below the words "MICRO-TECH" are two Chinese characters. The logo is blue and white.
## 510K Summary
This 510(k) Summary of 510(k) safety and effectiveness information is being submitted in accordance with requirements of SMDA 1990 and Title 21, CFR Section 807.92.
The assigned 510(k) Number: K150316
### 1. Date of Preparation: 01/16/2015
#### 2. Sponsor Identification
### Micro-Tech (Nanjing) Co., Ltd.
No.10 Gaoke Third Road, Nanjing National Hi-Tech, Industrial Development Zone, Nanjing, Jiangsu Province, PRC Establishment Registration Number: 3004837686 Contact Person: Becky Li Position: Manager of Quality Department Tel: +86-25-58646378 Fax: +86-25-58744269 Email: In@micro-tech.com.cn
### 3. Identification of Proposed Device
Product Name: Polypectomy Snare Common Name: Snare, Flexible Regulatory Information Classification Name: Endoscopic electrosurgical unit and accessories Classification: 2 Product Code: FDI Subsequent Product Code: FDI Regulation Number: 876.4300 Review Panel: Gastroenterology/Urology
#### 4. Predicate Devices:
GIP/MEDI-GLOBE POLYPECTOMY SNARES cleared under K943935
#### 5. Indications for Use
The Polypectomy Snares are used endoscopically in the removal of diminutive polyps, sessile polyps, and pedunculated polyps from within the GI tract.
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Image /page/4/Picture/1 description: The image shows the logo for MICRO-TECH. The logo consists of a blue stylized "MT" on the left, followed by the text "MICRO-TECH" in a sans-serif font. There is a thin line underneath the text, and below that are two Chinese characters. The logo is simple and modern, with a focus on the company's name.
#### 6. Device Description
The proposed device Polypectomy Snare is a sterile, single-use endoscopic device, intended to be used endoscopically in the removal diminutive polyps, sessile polyps, and pedunculated polyps from within the GI tract.
The Polypectomy Snares consists of a flexible wire cable and loop which can be extended and retracted from the snare's flexible outer sheath using a handle. When passed through an endoscope the snare can be activated to deliver a monopolar electrical current to cut and cauterize tissue with the loop. The proposed device has eighteen (18) specifications; the main differences of these specifications are dimension and if the loop can be rotatable with the rotation of the handle.
#### 7. Identification of Predicate Device
510(k) Number: K943935 Product Name: GIP/MEDI-GLOBE POLYPECTOMY SNARES
#### 8. Non-Clinical Test Conclusion
Non clinical tests were conducted to verify that the proposed device met all design specifications as was Substantially Equivalent (SE) to the predicate device. The test results demonstrated that the proposed device complies with the following standards:
ASTM F88/F88M-09, Standard Test Method For Seal Strength Of Flexible Barrier Materials.
ASTM F1929-12, Standard Test Method For Detecting Seal Leaks In Porous Medical Packaging By Dye Penetration.
ASTM F1140/F1140M-13, Standard Test Methods For Internal Pressurization Failure Resistance Of Unrestrained Packages.
IEC60601-2-18:2009 Medical electrical equipment Part 2-18: Particular requirements for the safety of endoscopic equipment
ANSI/AAMI HF18:2001 Electrosurgical devices
AAMI ANSI ES60601-1:2005/(R)2012 And C1:2009/(R)2012 Medical Electrical
Equipment Part 1: General requirements for safety
IEC60601-2-2:2009 Medical electrical equipment Part 2-2: Particular requirements for the safety of high frequency surgical equipment
ISO 11737-1 Second Edition 2006-04-01 Sterilization of medical devices -
Microbiological methods—Part 1: Determination of a population of microorganisms on products
ASTM F1886/F1886M - 09 Standard Test Method for Determining Integrity of Seals for
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Image /page/5/Picture/1 description: The image shows the logo for Micro-Tech. The logo consists of the letters "MT" in a stylized, three-dimensional font on the left. To the right of the letters is the text "MICRO-TECH" in a sans-serif font, with a thin line underneath. Below the line are two Chinese characters.
Flexible Packaging by Visual Inspection
ASTM F1929-12, Standard Test Method For Detecting Seal Leaks In Porous Medical Packaging By Dye Penetration
ASTM F1980 - 07:2011 Standard Guide for Accelerated Aging of Sterile Barrier Systems for Medical Devices
AAMI ANSI ST72:2011 bacterial endotoxins - test methods, routine monitoring, and alternatives to batch testing.
ASTM F88/F88M-09, Standard Test Method For Seal Strength Of Flexible Barrier Materials.
ISO 10993-5:2009/(R) 2014, Biological Evaluation Of Medical Devices -- Part 5: Tests For In Vitro Cytotoxicity.
ISO 10993-7:2008(R) 2012, Biological Evaluation Of Medical Devices - Part 7:
Ethylene Oxide Sterilization Residuals.
ISO 10993-10:2010, Biological Evaluation Of Medical Devices - Part 10: Tests For Irritation And Skin Sensitization.
USP <71> Sterility Tests.
USP 37-NF 32: 2014 <85> BACTERIAL ENDOTOXINS TEST
## 9. Clinical Test Conclusion
No clinical study is included in this submission.
#### 10. Substantially Equivalent (SE) Comparison
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Image /page/6/Picture/0 description: The image contains a logo for MICRO-TECH. The logo consists of a stylized blue "MT" monogram on the left, followed by the text "MICRO-TECH" in blue. Below the text, there are two Chinese characters in a lighter shade of blue.
510K Summary
| Item | Proposed Device | Predicate Device | Substantial Equivalence |
|-------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|
| Product Code | FDI | FDI | Same |
| Regulation No. | 876.4300 | 876.4300 | Same |
| Class | 2 | 2 | Same |
| Indications for Use | The Polypectomy Snares are used<br>endoscopically in the removal diminutive<br>polyps, sessile polyps, and pedunculated<br>polyps from within the GI tract. | The Polypectomy snare is intended to<br>remove polyps and small tumors from<br>the gastrointestinal tract with high<br>frequency current. | Similar |
| Single Use | Yes | Yes | Same |
| Configuration | Configuration Loop, outer tube,<br>High-Frequency, and Handle | Loop, outer tube, High-Frequency,<br>and Handle | Same |
| Energy used/ Delivered | Monopolar Radio Frequency Current | Monopolar Radio Frequency Current | Same |
| Loop Shape | Oval | Oval, Hexagonal, Asymmetric | Similar |
| Loop Diameter | Oval: 10mm, 15mm, 20mm, 24mm, 30mm,<br>36mm | Oval: 15mm, 20mm, 25mm, 35mm,<br>50mm;<br>Hexagonal: 15mm, 25mm, 35mm;<br>Asymmetric: 15mm, 25mm | Similar |
| Outer Tube Diameter | 2.3mm | 2.5mm | Similar |
| Minimal Working Channel | 2.8mm | 2.8mm | Same |
| Working Length | 2300mm | 1800mm, 2300mm | Similar |
# Table 1 Comparison of Technology Characteristics
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Image /page/7/Picture/0 description: The image shows the logo for MICRO-TECH. The logo consists of the letters "MT" in a stylized, three-dimensional font. Below the word MICRO-TECH is the Chinese characters "微 创".
# 510K Summary
| | | | 510K Summary |
|-----------------------------|-----------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------|--------------|
| Electrode contact impedance | $13.46\pm0.68$ | $13.64\pm0.90$ | Similar |
| Cutting | $23.75\pm1.14$ | $23.42\pm1.62$ | Similar |
| Pushability | $3.08\pm0.64$ | $3.38\pm0.81$ | Similar |
| Performance | Electrode contact impedance, Cutting, Pushability and Tensile Strength | Electrode contact impedance, Cutting, Pushability and Tensile Strength | Same |
| Patient-contact Material | Stainless steel SUS304 (With Dow Corning® MDX4-4159, 50% Medical Grade Dispersion) and Polytetrafluoroethylene (PTFE) | Stainless steel SUS304 (With Dow Corning® MDX4-4159, 50% Medical Grade Dispersion) and Polytetrafluoroethylene (PTFE) | Same |
| Biocompatibility | Comply with ISO 10993-5, ISO 10993-10 and USP <151>. | Comply with ISO 10993-5, ISO 10993-10, and USP <151>. | Same |
| Sterilization | EO Sterilized, SAL: 10-6 | EO Sterilized, SAL: 10-6 | Same |
| Shelf Life | Three years | Five years | Similar |
| Labeling | Conforms to 21 CFR part 801 | Conforms to 21 CFR part 801 | Same |
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Image /page/8/Picture/1 description: The image shows the logo for MICRO-TECH. The logo consists of a blue stylized "MT" on the left, followed by the words "MICRO-TECH" in blue, with a line underneath. Below the line are two Chinese characters, also in blue.
#### Substantially Equivalent (SE) Conclusion 11.
Based on the comparison and analysis from the nonclinical tests, the proposed devices is safe and effective, perform is as well as the predicate devices. It determined to be Substantially Equivalent (SE) to the predicate devices.
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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.