The HANAROSTENT LowAxTM Colon/Rectum (NNN) is indicated for the palliative treatment of colorectal strictures produced by malignant neoplasms and to relieve large bowel obstruction prior to colectomy in palignant structures. The HANAROSTENT LowAxTM Duodenum/Pylorus (NNN) is indicated for the palliative treatment of pyloric or duodenal obstructions caused by malignant neoplasms.
Device Story
Self-expanding tubular prosthesis; maintains patency of colorectal or duodenal obstructions caused by malignant tumors. Consists of Nitinol wire stent and polymeric delivery system. Used in clinical settings (endoscopy or fluoroscopy suites) by physicians. Stent loaded into distal delivery system; introduced via 0.035-inch guidewire to target location. Radiopaque markers facilitate placement accuracy. Upon deployment, stent exerts outward radial force on luminal surface to establish patency. Delivery system removed and discarded. Single-use device.
Clinical Evidence
Bench testing only. Performance data includes axial force, compression force, corrosion, deployment force/accuracy, dimensions, expansion force, repositioning force, stent separation, tensile strength, and trackability. New bench testing provided for MR compatibility.
Indicated for palliative treatment of colorectal strictures from malignant neoplasms and relief of large bowel obstruction prior to colectomy; also indicated for palliative treatment of pyloric or duodenal obstructions caused by malignant neoplasms.
Regulatory Classification
Identification
An esophageal prosthesis is a rigid, flexible, or expandable tubular device made of a plastic, metal, or polymeric material that is intended to be implanted to restore the structure and/or function of the esophagus. The metal esophageal prosthesis may be uncovered or covered with a polymeric material. This device may also include a device delivery system.
Special Controls
The special control for this device is FDA's “Guidance for the Content of Premarket Notification Submissions for Esophageal and Tracheal Prostheses.”
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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 logo. To the right of that is the FDA logo, which 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.
January 10, 2019
M.I. Tech Co., Ltd. % Beryl St. Jeanne Associate Regulatory Specialist NAMSA 400 Highway 169 South, Suite 500 Minneapolis, MN 55426
Re: K183616
Trade/Device Name: HANAROSTENT LowAxTM Colon/Rectum (NNN) HANAROSTENT LowAxTM Duodenum/Pylorus (NNN) Regulation Number: 21 CFR§ 878.3610 Regulation Name: Esophageal Prosthesis Regulatory Class: II Product Code: MQR, MUM Dated: December 21, 2018 Received: December 26, 2018
Dear Beryl St. Jeanne:
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 mav, 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 avare 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.
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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) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see
https://www.fda.gov/CombinationProducts/GuidanceRegulatoryInformation/ucm597488.html; 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 http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm.
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,
# Daniel G. Walter Jr -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)
#### K183616
Device Name
HANAROSTENT LowAxTM Colon/Rectum (NNN) HANAROSTENT LowAxTM Duodenum/Pylorus (NNN)
Indications for Use (Describe)
The HANAROSTENT LowAxTM Colon/Rectum (NNN) is indicated for the palliative treatment of colorectal strictures produced by malignant neoplasms and to relieve large bowel obstruction prior to colectomy in palignant structures.
The HANAROSTENT LowAxTM Duodenum/Pylorus (NNN) is indicated for the palliative treatment of pyloric or duodenal obstructions caused by malignant neoplasms.
| Type of Use (Select one or both, as applicable) | |
|------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------|
| <span style="font-size:10px">☒</span> Prescription Use (Part 21 CFR 801 Subpart D) | <span style="font-size:10px">☐</span> 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 M.I.Tech. The logo consists of the letters "MIT" in a stylized font, with a red dot above the "I". To the right of the letters is the text "M.I.Tech" in a bold, sans-serif font. Below the logo is the website address "www.mitech.co.kr".
HEAD OFFICE
174, HABUK2-GIL, JilNWHMYEON, PYEONGTAEK-SI, GYEONGGI-DO,
17706, REPUBLIC OF KOREA
TEL +82 31 662 5645 FAX +82 31 662 5648
# 5 510(k) Summary
| 510(k) Number | K183616 | Intended Use /<br>Indications for Use: | The HANAROSTENT® LowAx™ Colon/Rectum (NNN) is indicated<br>for the palliative treatment of colorectal strictures produced by<br>malignant neoplasms and to relieve large bowel obstruction prior to<br>colectomy in patients with malignant structures. | |
|-------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Preparation Date: | December 21, 2018 | | The HANAROSTENT® LowAx™ Duodenum/Pylorus (NNN) is<br>indicated for the palliative treatment of pyloric or duodenal obstructions<br>caused by malignant neoplasms. | |
| Submitter: | M.I. Tech Co., Ltd.<br>174 Habuk 2-gil, Jinwi-myeon,<br>Pyeongtaek-si, Gyeonggi-do<br>17706, Republic of Korea<br>Phone: 82-31-662-5645<br>Fax: 82-31-662-5648 | Device Description: | This self-expanding tubular prosthesis designed to maintain patency of<br>colorectal or duodenal obstructions caused by malignant tumors. It<br>consists of a self-expandable metal stent and a delivery system. The<br>self-expandable metal stent is made of nickel titanium alloy (Nitinol)<br>wire and the delivery system is made of polymeric materials. The stent<br>is loaded into the distal part of the delivery system. The<br>HANAROSTENT® LowAx™ Colon/Rectum (NNN) and<br>HANAROSTENT® LowAx™ Duodenum/Pylorus (NNN) are intended<br>for single use only. | |
| Primary Contact: | Inae Kim<br>Medical Affairs Team Manager<br>M.I. Tech Co., Ltd.<br>174 Habuk 2-gil, Jinwi-myeon,<br>Pyeongtaek-si, Gyeonggi-do<br>17706, Republic of Korea<br>Email: inae116@mitech.co.kr<br>Phone: 82-70-4304-7450<br>Fax: 82-2-3473-4702 | Predicate Device: | HANAROSTENT® LowAx™ Colon/Rectum (NNN);<br>HANAROSTENT® LowAx™ Duodenum/Pylorus (NNN)<br>510(k) Number: K180180<br>Decision Date: 11/02/2018 | |
| Subject Device: | Trade Name:<br>Common Name:<br>Classification Regulation:<br>Classification Name:<br>Regulatory Class:<br>Product Code:<br>Classification Panel:<br><br>Trade Name:<br>Common Name:<br>Classification Regulation:<br>Classification Name:<br>Regulatory Class:<br>Product Code:<br>Classification Panel: | HANAROSTENT® LowAx™<br>Colon/Rectum (NNN)<br>Colon/Rectum Stent<br>21 CFR 878.3610<br>Esophageal Prosthesis<br>Class II<br>MQR<br>Gastroenterology/Urology<br><br>HANAROSTENT® LowAx™<br>Duodenum/Pylorus (NNN)<br>Duodenum/Pylorus Stent<br>21 CFR 878.3610<br>Esophageal Prosthesis<br>Class II<br>MUM<br>Gastroenterology/Urology | Mechanism of<br>Action: | The delivery system is supplied for either endoscopic or fluoroscopic<br>delivery. The delivery system for use with endoscopes is mostly used<br>at the department of internal treatment. The stent and delivery system<br>are inserted through the channel of endoscopes and the stent is<br>expanded and deployed at the target region. The fluoroscopic delivery<br>device is used for inserting the device at the target position during<br>fluoroscopic procedures. |
| | The stent is loaded by the delivery system and upon deployment of the<br>stent it imparts an outward radial force on the luminal surface of the<br>colon to establish patency. The stent is constrained and loaded between<br>the two sheaths. Through the use of a 0.035 inch guidewire, the delivery<br>system and stent are introduced to the intended target location.<br>Radiopaque markers allow visualizing and measuring placement<br>accuracy. After deployment of the stent the delivery system is removed<br>and discarded | | | |
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| Technological<br>Characteristics: | The subject device in this Traditional 510(k) submission is the exact same, identical device as predicate device K180180. M.I. Tech intends to leverage the identical technological characteristics provided with K180180. There have been no changes to the fundamental technological characteristics since K180180 received clearance. Therefore, the subject and predicate device have identical technological characteristics: - Biocompatible materials - Stent design - Delivery device design - Radiopaque markers - Single use - Method of placement - Method of deployment - Sterilization method - Packaging configuration and materials - Shelf life The only difference in technological characteristics between the subject and predicate device is that M.I. Tech is providing MR compatibility testing with this submission to support MR conditional labeling for the subject device. |
|-----------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Performance Testing: | The subject device in this Traditional 510(k) submission is the exact same, identical device as predicate device K180180. M.I. Tech intends to leverage the performance testing provided with K180180: - Axial force - Compression force - Corrosion - Deployment force - Deployment accuracy - Dimensions - Expansion force - Repositioning force - Stent separation - Tensile strength - Trackability M.I. Tech is providing new bench testing with this Traditional 510(k) in support of its subject device: - MR compatibility |
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Image /page/6/Picture/1 description: The image shows the logo for M.I.Tech. The logo is blue and features the company name in a stylized font. Below the logo is the company's website address, www.mitech.co.kr.
HEAD OFFICE
174, HABUK2-GIL, JilNWHMYEON, PYEONGTAEK-SI, GYEONGGI-DO,
17706, REPUBLIC OF KOREA
TEL +82 31 662 5645 FAX +82 31 662 5648
| Substantial | The subject device in this Traditional 510(k) submission is the exact |
|--------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Equivalence: | same, identical device as predicate device K180180. There are no<br>differences between the subject device and the predicate device with<br>respect to indications and intended use. The only difference in<br>technological characteristics between the subject and predicate device<br>is that M.I. Tech is providing MR Compatibility testing with this<br>submission to support MR Conditional labeling for the subject device.<br>Therefore, the subject device and the predicate device are identical<br>devices, and support M.I. Tech's claim of substantial equivalence. |
| Conclusion: | The subject and predicate devices have the identical intended<br>use/indications for use, device description, mechanism of action,<br>technological characteristics, and performance testing.<br><br>The only difference in technological characteristics between the subject<br>and predicate device is that M.I. Tech is providing MR Compatibility<br>testing with this submission to support MR Conditional labeling for the<br>subject device.<br><br>Performance data supports the safety of the subject device and<br>demonstrates that the HANAROSTENT® LowAx™ Colon/Rectum<br>(NNN) and the HANAROSTENT® LowAx™ Duodenum/Pylorus<br>(NNN) are safe and effective and will perform as intended in the<br>specified use conditions. |
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.