The Nasal/Epistaxis Pack is a sterile, single use device intended for use in patients undergoing nasal/sinus surgery as a space-occupying packing. The Nasal/Epistaxis Pack is indicated for use in patients undergoing nasal/sinus surgery as a space occupying packing to: - Separate tissue or structures compromised by surgical trauma; - Separate and prevent adhesions between mucosal surfaces during mesothelial cell regeneration in the nasal cavity; - Help control minimal bleeding following surgery or trauma; - Help control minimal bleeding following surgery or nasal trauma by tamponade effect, blood absorption and platelet aggregation; - Act as an adjunct to aid in the natural healing process. The Nasal/Epistaxis Pack is indicated for use as a nasal packing to treat epistaxis.
Device Story
Nasal/Epistaxis Pack is a sterile, single-use, dry co-polymer pack (polyethylene glycol and chitosan) measuring 4.0 cm x 2.4 cm x 0.3 cm. Upon placement in the nasal cavity by a clinician, the device absorbs fluids, swells, and conforms to mucosal surfaces. It functions as a space-occupying stent to separate tissues, prevent adhesions, and provide tamponade to control minimal bleeding. The device is intended for use following nasal/sinus surgery or trauma, or to treat epistaxis. It aids the natural healing process and is removed via natural elimination or aspiration by a physician.
Clinical Evidence
Bench testing only. No clinical data provided.
Technological Characteristics
Material: Co-polymer of polyethylene glycol (PEG) and chitosan. Form factor: 4.0 cm x 2.4 cm x 0.3 cm dry pack. Principle: Hygroscopic swelling upon fluid contact to conform to mucosal surfaces. Sterilization: Not specified. Biocompatibility: Complies with ISO 10993-1.
Indications for Use
Indicated for patients undergoing nasal/sinus surgery or experiencing epistaxis. Used as a space-occupying packing to separate tissues, prevent adhesions, control minimal bleeding via tamponade/absorption/platelet aggregation, and aid natural healing.
Regulatory Classification
Identification
An intranasal splint is intended to minimize bleeding and edema and to prevent adhesions between the septum and the nasal cavity. It is placed in the nasal cavity after surgery or trauma. The intranasal splint is constructed from plastic, silicone, or absorbent material.
MeroPack Bioresorbable Nasal Packing and Sinus Stent (K041381)
MeroGel™ Control Gel ENT Surgical Dressing (K002972)
Submission Summary (Full Text)
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K113585
## Section 5 - 510(k) Summary or 510(k) Statement
### General Information I.
Submitter:
ﺮ ﺍﻟ
CogENT Therapeutics, LLC 703 Sandoval Way Hayward, CA 94544 Telephone: 650-450-4956
Contact Person:
Glen Gong Principal Telephone: 650-450-4956 x 102
Summary Preparation Date:
April 3, 2012
- II. Names
Device Names:
Nasal/Epistaxis Pack
Intranasal splint, ENT polymer material, and Epistaxis Primary Classification Names: (packing)
### III. Predicate Devices
- Nasopore® manufactured by Polyganics BV (K052099) .
- Sepragel ENT Bioresorbable Packing/Stent manufactured by Genzyme Corporation . (K043035)
- Rhinocell® Nasal Packings manufactured by Boston Medical Products, Inc. . (K972459)
- MeroPack Bioresorbable Nasal Packing and Sinus Stent manufactured by Medtronic . Xomed Inc. (K041381)
- MeroGel" Control Gel ENT Surgical Dressing manufactured by Medtronic Xomed . Inc. (K002972)
### IV. Product Description
The Nasal/Epistaxis Pack is a sterile, single use, co-polymer of polyethylene glycol (PEG) and chitosan provided as a dry 4.0 cm x 2.4 cm x 0.3 cm pack. Upon placement, the Nasal/Epistaxis Pack absorbs fluids in the field and swells and conforms to the mucosal tissue/treatment site surfaces to separate tissues and prevent adhesions, control minimal bleeding following surgery or trauma, to treat epistaxis, and to act as an adjunct to aid in the natural healing process.
### V. Indications for Use
The Nasal/Epistaxis Pack is a sterile, single use device intended for use in patients undergoing nasal/sinus surgery as a space-occupying packing.
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The Nasal/Epistaxis Pack is indicated for use in patients undergoing nasal/sinus surgery as a space occupying packing to:
- Separate tissue or structures compromised by surgical trauma; ●
- Separate and prevent adhesions between mucosal surfaces during mesothelial cell . regeneration in the nasal cavity;
- Help control minimal bleeding following surgery or trauma; .
- Help control minimal bleeding following surgery or nasal trauma by tamponade ● effect, blood absorption and platelet aggregation; and
- Act as an adjunct to aid in the natural healing process. .
The Nasal/Epistaxis Pack is indicated for use as a nasal packing to treat epistaxis.
#### VI. Rationale for Substantial Equivalence
The Nasal/Epistaxis Pack shares the same indications for use, device operation, overall technical and functional capabilities, and therefore is substantially equivalent to the predicate devices for use as a space-occupying stent/packing for nasal/sinus use.
In addition, comparative performance test data demonstrated adequate device performance.
## VII. Safety and Effectiveness Information
The review of the indications for use and technical characteristics provided demonstrates that the Nasal/Epistaxis Pack is substantially equivalent to the predicate devices (see Table on following page).
### VIII. Conclusion
The Nasal/Epistaxis Pack was found to be substantially equivalent to the predicate devices.
The Nasal/Epistaxis Pack shares identical indications for use, similar design features, and functional features with, and thus is substantially equivalent to, the predicate devices.
יר
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| Devices<br>↓ | Characteristic | K052099<br>Nasopore®<br>Polyganics BV | K043035<br>Sepragel ENT<br>Bioresorbable<br>Packing/Stent<br>Genzyme Corp. | K972459<br>Rhinocell® Nasal<br>Packings<br>Boston Medical<br>Products, Inc. | K041381<br>MeroPack Bioresorbable<br>Nasal Packing and Sinus<br>Stent<br>Medtronic Xomed Inc. | K002972<br>MeroGel™ Control Gel<br>ENT Surgical Dressing<br>Medtronic Xomed Inc. | |
|--------------|---------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| | Product<br>Codes | LYA = Intranasal splint | KHJ = ENT Synthetic<br>Polymer Material | EMX = Epistaxis balloon | LYA = Intranasal Splint | KHJ = ENT Synthetic<br>Polymer Material | |
| | Regulations | 21 CFR 874.4780 | 21 CFR 874.3620 | 21 CFR 874.4100 | 21 CFR.874.4780 | 21 CFR 874.3620 | |
| | Indications<br>For Use | | See Section V above | | | | |
| | Ingredients | Crosslinked Polyethylene<br>Glycol (PEG) and Chitosan | Fragmentable<br>poly(DL-lactide-co-ε-<br>caprolactone) urethane | Derivative of<br>hyaluronic acid | Polyvinyl alcohol (PVA)<br>sponge using a patented<br>formula. | Esterfied hyaluronic acid<br>(HYAFF®) and Collagen | Esterfied hyaluronic acid<br>(HYAFF®) |
| | Method of<br>action/<br>removal | • Hygroscopic, forms<br>gelatinous mass in contact<br>w/ fluids<br>• Natural elimination,<br>aspiration or gentle<br>irrigation of residues<br>• Upon application device<br>swells and conforms to<br>mucosal surfaces. | • Hygroscopic,<br>fragments in contact<br>with fluids<br>• Fragments within<br>several days after<br>insertion in the nasal<br>cavity<br>• Drained from the nasal<br>cavity via the natural<br>mucus flow. | • Fills nasal/sinus<br>cavities<br>• Leaves placement<br>site by natural<br>elimination, or may<br>be aspirated from<br>the cavity earlier at<br>physician's<br>discretion | • The packings will<br>expand as fluid is<br>introduced, giving the<br>surgeon time for<br>accurate positioning. | • Hygroscopic, forms<br>gelatinous mass in<br>contact with fluids.<br>• Absorbent >10 times<br>weight of device<br>• The stent gradually<br>degrades over time and<br>is slowly absorbed<br>within 14 days, or it<br>may be aspirated from<br>the cavity earlier at the<br>discretion of the<br>physician. | • Hygroscopic, forms<br>gelatinous mass in<br>contact with fluids.<br>• Absorbent >6 times<br>weight of device<br>• Dressing may be<br>compressed/ shaped by<br>surgeon as needed<br>• Gel eventually<br>dissolves, or it may be<br>aspirated from the<br>cavity earlier at the<br>discretion of the<br>physician. |
| | Sterility | Sterile by E-Beam<br>Irradiation | Sterile by EO gas | Sterile | Sterile by Gamma<br>Irradiation | Sterile by Gamma<br>Irradiation | Sterile by Gamma<br>Irradiation |
| | Biocompat | Complies with ISO 10993-1 | Complies with<br>ISO 10993-1 | Unknown - not<br>specified | Unknown - not specified | Complies with<br>ISO 10993-1 | Complies with<br>ISO 10993-1 |
| | How<br>Supplied | • 4.0 cm x 2.4 cm x 0.3 cm<br>pack<br>• Single use<br>• Single barrier Foil pouch<br>• Sterile, ready to use | • Single use<br>• Single barrier Tyvek<br>pouch | • Single use<br>• Transparent<br>viscoelastic gel | • Variety of shapes and<br>sizes to choose from,<br>both with and without<br>integral airways<br>• Sterile, ready to use | • Single use<br>• Lyophilized (freeze<br>dried) and compressed<br>dressing | • Single use |
.
Section 5: 510(k) Summary - Page 5-3
CogENT Therapeutics, LLC 510(k) Submission for:
Nasal/Epistaxis Pack
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# DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/3/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is a stylized image of an eagle with its wings spread, representing the department's mission to protect the health of all Americans.
### Public Health Service
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room-WO66-G609 Silver Spring, MD 20993-0002
CogENT Therapeutics, LLC % Ms. Anne Worden Regulatory Consultant 703 Sandoval Way Hayward, CA 94544
APR 2 5 2012
Re: K113585
Trade Name: Nasal/Epistaxis Pack Regulation Number: 21 CFR 874.4780 Regulation Name: Intranasal splint Regulatory Class: I Product Code: LYA, EMX Dated: April 3 2012 Received: April 4, 2012
Dear Ms. Worden:
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 that I Dr mas intact and regulations administered by other Federal agencies. You must or any I 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-related adverse events) (21 CFR 803); good manufacturing practice requirements as set
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Page 2-Ms. Anne Worden
forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic form in the quality systems (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 If you desire specific advice for your a vite soffices/CDRHOffices/ucm115809.html for go to mightwww.ida.gov/About Bril Sellers's (CDRH's) Office of Compliance. Also, please the Center for Devices and Radionagiou. Heath of (con" (2) Children (2) (CFR Patt note the regulation entitied, "Misolanding of reference events under the MDR regulation (21 CFR Part 803), please go to
CFK Part 803), prease go to nttp://www.raa.governers/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the You may obtain other general informations on your Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
(800) 030-2041 01 (50%) ical Devices/Resourcesfor You/Industry/default.htm.
Sincerely yours,
Malvina B. Eydelman, M.D.
Director Division of Ophthalmic and Ear, Nose and Throat Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use Statement
510(k) Number (if known): K11
#### Nasal/Epistaxis Pack Device Name:
Indications for Use:
The Nasal/Epistaxis Pack is a sterile, single use device intended for use in patients undergoing nasal/sinus surgery as a space-occupying packing.
The Nasal/Epistaxis Pack is indicated for use in patients undergoing nasal/sinus surgery as a space occupying packing to:
- Separate tissue or structures compromised by surgical trauma; .
- Separate and prevent adhesions between mucosal surfaces during mesothelial cell . regeneration in the nasal cavity;
- Help control minimal bleeding following surgery or trauma; .
- Help control minimal bleeding following surgery or nasal trauma by tamponade effect, blood . absorption and platelet aggregation;
- Act as an adjunct to aid in the natural healing process. .
The Nasal/Epistaxis Pack is indicated for use as a nasal packing to treat epistaxis.
イ Prescription Use (Part 21 CFR 801 Subpart D)
AND/OR
Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
| Concurrence of CDRH, Office of Device Evaluation (ODE) |
|--------------------------------------------------------|
|--------------------------------------------------------|

*(Division Sign-Off)*
Division of Ophthalmic, Neurological and Ear, Nose and Throat Devices
510(k) Number k 113585
Page: 1 of 1
CogENT Therapeutics, LLC 510(k) Submission for: Nasal/Epistaxis Pack
Section 4: Indications for Use - Page 4-2
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.