K172985 · Leo Medical Co., Ltd. · FHN · Jun 14, 2018 · Gastroenterology, Urology
Device Facts
Record ID
K172985
Device Name
Ligation Device
Applicant
Leo Medical Co., Ltd.
Product Code
FHN · Gastroenterology, Urology
Decision Date
Jun 14, 2018
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 876.4400
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The device is designed to be used with an Endoscope to deliver a Ligation Loop designed to prevent or control bleeding following polypectomy of pedunculated polyps.
Device Story
Sterile, single-use endoscopic ligation device; consists of ligation loop and delivery system. Used with endoscope to deliver loop to site of pedunculated polyp post-polypectomy. Operated by physician in clinical setting. Loop deployed to mechanically ligate tissue to control or prevent bleeding. Benefits patient by providing immediate hemostasis during endoscopic procedures.
Clinical Evidence
No clinical data. Bench testing only. Compliance with ISO 10993 (biocompatibility) and ASTM F88/F88M-15 (seal strength) verified. Sterilization validated per ISO 11135.
Technological Characteristics
Single-use endoscopic ligation system. Materials evaluated per ISO 10993. Sterilization: Ethylene Oxide (ISO 11135, SAL 10^-6). Dimensions: 15-40mm open width, 1650-2300mm working length, 2.8mm minimal working channel. Mechanical actuation via delivery system.
Indications for Use
Indicated for patients undergoing polypectomy of pedunculated polyps to prevent or control bleeding.
Regulatory Classification
Identification
A hemorrhoidal ligator is a device used to cut off the blood flow to hemorrhoidal tissue by means of a ligature or band placed around the hemorrhoid.
Special Controls
*Classification.* Class II (special controls). Except for a hemostatic metal clip intended for use in the gastrointestinal tract, the device 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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June 14, 2018
Leo Medical Co., Ltd. Yunpeng Ma Quality and Registration Director 2 Floor, 10 Building 18 Huashan Road Changzhou City, 213022 Jiangsu Province CHINA
Re: K172985 Trade/Device Name: Ligation Device Regulation Number: 21 CFR 876.4400 Regulation Name: Hemorrhoidal ligator Regulatory Class: Class II Product Code: FHN, MND Dated: May 16, 2018 Received: May 18, 2018
Dear Yunpeng Ma:
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
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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 comprehensive regulatory information about medical devices and radiation-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,
# Glenn B. Bell -S
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)
K172985
Device Name Ligation Device
Indications for Use (Describe)
The device is designed to be used with an Endoscope to deliver a Ligation Loop designed to control bleeding following polypectomy of pedunculated polyps.
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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## Tab #2 510(k) Summary
This 510(k) Summary is being submitted in accordance with requirements of Title 21, CFR Section 807.92.
The assigned 510(k) Number: K172985
- 1. Date of Preparation: 04/28/2018
- 2. Sponsor Identification
#### Leo Medical Co., Ltd.
2 Floor, 10 Building, 18 Huashan Road, Changzhou City, 213022, Jiangsu Province, China
Establishment Registration Number: Not yet registered.
Contact Person: Yunpeng MA Position: Quality and Registration Director Tel: +86-519-85150750-620 Fax: +86-519-85150790 Email: ypma@leomed.cn
- 3. Identification of Proposed Device
Trade Name: Ligation Device Common Name: Ligator Device
Regulatory Information
Regulation Name: Hemorrhoidal ligator Classification: 2 Product Code: FHN Subsequent Product Code: MND Regulation Number: 876.4400 Review Panel: Gastroenterology/ Urology
Intended Use Statement:
The device is designed to be used with an Endoscope to deliver a Ligation Loop designed to prevent or control bleeding following polypectomy of pedunculated polyps.
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Device Description
The Ligation Device is sterile and single-use, which consists of two main components, ligation loop and delivery system. And these two components provided in different sizes to consist different specifications of ligation device.
- 4. Identification of Predicate Device
510(k) Number: K964661 Product Name: Olympus HX-20-1 Endoscopic Ligator
- 5. 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-15, Standard Test Method for Seal Strength of Flexible Barrier Materials.
- > ISO 10993-1:2009+AC2010 Biological evaluation of medical device- Part 1: Evaluation and testing within a risk management process [Including: Technical Corrigendum 1 (2010)]
- A ISO 10993-5:2009, Biological Evaluation of Medical Devices -- Part 5: Tests For In Vitro Cytotoxicity.
- > ISO 10993-6:2016 Biological Evaluation Of Medical Devices -- Part 6: Tests For Local Effects After Implantation
- > ISO 10993-7:2008+AC:2009, 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.
- > ISO 10993-11: 2006, Biological Evaluation Of Medical Devices - Part 11: Tests For Systemic Toxicity
- A ISO 11135:2014 Sterilization of health-care products-Ethylene Oxide- requirements for the development, validation and routine control of a sterilization process for medical devices
- Clinical Test Conclusion 6.
No clinical study is included in this submission.
- 7. Substantially Equivalent (SE) Comparison
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| Item | Proposed Device | Predicate Device | |
|-------------------------|--------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------|
| Product Code | MND and FHN | MND and FHN | |
| Regulation Number | 876.4400 | 876.4400 | |
| Class | 2 | 2 | |
| Intended Use | The ligation device is intended to prevent or control bleeding following polypectomy of pedunculated polyps. | The Olympus HX-20-1 Endoscopic Ligator has been designed to be used with Olympus endoscopes in delivering a MAJ-254 Standard Ligation Loop or MAJ-340 Small ligation Loop, designed to prevent or control bleeding following polypectomy of pedunculated polyps. | |
| Single Use | Yes | Not | |
| Configuration | Ligation loop<br>Delivery system | Loop<br>FG Handle<br>Coil sheath | |
| Open width | 15, 20, 30, 40mm | 13~30mm | |
| Minimal working channel | 2.8mm | 2.8mm | |
| Working length | 1650, 1950, 2300mm | 1650~2300mm | |
| Performance | Release force, tensile strength, clamping strength | Release force, tensile strength, clamping strength | |
| Biocompatibility | Cytotoxicity | No cytotoxicity | Comply with ISO 10993 requirements |
| | Sensitization | No sensitization | |
| | Irritation | No irritation | |
| | Acute Systemic Toxicity | No acute systemic toxicity | |
| | Subchronic Systemic Toxicity | No subchronic systemic toxicity | |
| | Subcutaneous Implantation | The histological responses around the test sample were similar to the control sample. | |
| | Pyrogenicity | No pyrogenicity | |
| Sterilization | EO sterilized, SAL 10-6 | Moist heat, SAL 10-6 | |
| Shelf life | Two years | No requirement | |
| Labeling | Conform to 21 CFR part 801 | Conform to 21 CFR part 801 | |
| | | | Table 1 Comparison of Technology Characteristics |
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|--|--|--|--------------------------------------------------|
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The proposed device and predicate device share similar intended use and performance. The proposed device is single-use, which is sterilized by the manufacturer, and the sterilization cycle has been validated per ISO 11135. The coil sheath and FG handle of predicate device is reusable, and sterilized by user. Because of the re-sterilization, the safety and performance of the predicate devices would be influenced and reduced, and this condition would not be occur to the proposed device, the difference will not affect substantially equivalency.
#### 8. Substantially Equivalent (SE) Conclusion
Based on the comparison and analysis above, the proposed devices are determined to be Substantially Equivalent (SE) 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.