WILLSON ONE-FIT FLAT-FOLD HEALTHCARE PARTICULATE RESPIRATOR AND SURGICAL MASK, MODELS HC-NB095F AND HC-NB295F
K070782 · Survivair Respirators, LLC · MSH · Apr 11, 2007 · General, Plastic Surgery
Device Facts
Record ID
K070782
Device Name
WILLSON ONE-FIT FLAT-FOLD HEALTHCARE PARTICULATE RESPIRATOR AND SURGICAL MASK, MODELS HC-NB095F AND HC-NB295F
Applicant
Survivair Respirators, LLC
Product Code
MSH · General, Plastic Surgery
Decision Date
Apr 11, 2007
Decision
SESE
Submission Type
Abbreviated
Regulation
21 CFR 878.4040
Device Class
Class 2
Indications for Use
The Willson® ONE-Fit™ Flat-Fold™ Healthcare Particulate Respirator and Surgical Masks (Models HC-NB095F and HC-NB295F) are NIOSH-approved N95 single use respirators intended for use by healthcare personnel during medical/surgical procedures to protect both the wearer and the patient by protecting the wearer against the spatter of blood and other potentially infectious materials and reducing the transfer of microorganisms and other airborne particulate matter. The Willson ONE-Fit Flat-Fold masks also meet the CDC guidelines for TB exposure control within healthcare facilities and are intended for use as an isolation mask.
Device Story
Flat-fold style particulate respirator and surgical mask; single or dual strap configurations. Construction: inner/outer layers of spunbonded polypropylene; middle filtration layer of melt-blown polypropylene. Ultrasonically sealed facepiece halves and perimeter edges. Used by healthcare personnel in clinical settings to reduce transfer of microorganisms and protect against blood spatter/infectious materials. NIOSH-approved N95 (TC-84A-4372, TC-84A-4371).
Clinical Evidence
Bench testing only. Performance testing included fluid resistance, filter efficiency, bacterial filtration efficiency, flammability, and breathing resistance. Biocompatibility testing included cytotoxicity, sensitization, and skin irritation.
Indicated for healthcare personnel during medical/surgical procedures to protect wearer and patient from blood spatter, infectious materials, and airborne particulate matter; also indicated for TB exposure control and as an isolation mask.
Regulatory Classification
Identification
Surgical apparel are devices that are intended to be worn by operating room personnel during surgical procedures to protect both the surgical patient and the operating room personnel from transfer of microorganisms, body fluids, and particulate material. Examples include surgical caps, hoods, masks, gowns, operating room shoes and shoe covers, and isolation masks and gowns. Surgical suits and dresses, commonly known as scrub suits, are excluded.
Special Controls
*Classification.* (1) Class II (special controls) for surgical gowns and surgical masks. A surgical N95 respirator or N95 filtering facepiece respirator is not exempt if it is intended to prevent specific diseases or infections, or it is labeled or otherwise represented as filtering surgical smoke or plumes, filtering specific amounts of viruses or bacteria, reducing the amount of and/or killing viruses, bacteria, or fungi, or affecting allergenicity, or it contains coating technologies unrelated to filtration (e.g., to reduce and or kill microorganisms). Surgical N95 respirators and N95 filtering facepiece respirators are exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 878.9, and the following conditions for exemption:(i) The user contacting components of the device must be demonstrated to be biocompatible.
(ii) Analysis and nonclinical testing must:
(A) Characterize flammability and be demonstrated to be appropriate for the intended environment of use; and
(B) Demonstrate the ability of the device to resist penetration by fluids, such as blood and body fluids, at a velocity consistent with the intended use of the device.
(iii) NIOSH approved under its regulation.
(2) Class I (general controls) for surgical apparel other than surgical gowns and surgical masks. The class I device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 878.9.
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X070782
## 5. 510(k) Summary
| Submitter/Contact<br>Person | Richard O. Wood<br>The Wood Burditt Group<br>FDA Regulatory Counseling<br>1025 W. Everett Rd., Suite 100<br>APR 11 2007<br>Lake Forest, IL 60045<br>(847) 234-7500 x 203<br>rowood@woodburditt.com<br>(847) 574-0728 (fax) |
|------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Applicant | Survivair Respirators LLC<br>3001 S. Susan St.<br>Santa Ana, CA 92704 |
| Manufacturer | Bacou Dalloz Plaintel (SAS)<br>Gare<br>22940 Plaintel, France |
| Device Name | Willson® ONE-Fit™ Flat-Fold™ Healthcare Particulate<br>Respirator and Surgical Masks, Models HC-NB095F and HC-<br>NB295F |
| Common Name | Surgical N95 NIOSH-certified Respirator |
| Classification | Class II<br>Procode MSH<br>21 C.F.R. §878.4040 |
| Identification of<br>Predicates and Summary<br>of Substantial<br>Equivalence | The Willson® ONE-Fit™ Flat-Fold masks are substantially<br>equivalent to Survivair's own and recently cleared Willson®<br>ONE-Fit™ HC-NB095 Cup-style Healthcare<br>Particle<br>Respirator and Surgical Mask (K070139). The Flat-Fold<br>masks have been performance tested in an identical manner to<br>the predicate, and passed standardized tests for fluid<br>resistance, filter efficiency, bacterial filtration efficiency,<br>flammability and breathing resistance. The materials used in<br>the mask are virtually identical to the ones used on the cited<br>predicate, and were also determined to be biocompatible by<br>cytotoxicity, sensitization and skin irritation testing. |
| Device Description | The Willson ONE-Fit Flat-Fold Healthcare Particulate<br>Respirator and Surgical Masks are flat-fold style particulate<br>respirator and surgical masks. The only difference between<br>the two models is the number of straps; one has a single strap,<br>the other a double strap.<br>The inner layer of the mask is constructed of spunbonded<br>polypropylene, the middle layer is a filtration layer made of<br>melt blown polypropylene and the outer layer is a covering of<br>spunbonded polypropylene. The two halves that comprise<br>the flat-fold facepiece are ultrasonically sealed together. The |
| | lower halves and is/are ultrasonically welded into the corners<br>of the mask. The perimeter edges of the mask that contact the<br>wearer's face are also ultrasonically sealed to provide<br>reinforcement of the edges. |
| | The Willson ONE-Fit Flat-Fold Healthcare Particulate<br>Respirator and Surgical Masks are approved by NIOSH in<br>accordance with 42 CFR 84 as N95 particulate respirators.<br>NIOSH has issued approvals TC-84A-4372 (single strap) and<br>TC-84A-4371 (dual strap). |
| Intended Use and<br>Indications | The Willson® ONE-Fit™ Flat-Fold™ Healthcare Particulate<br>Respirator and Surgical Masks (Models HC-NB095F and HC-<br>NB295F) are NIOSH-approved N95 single use respirators<br>intended for use by healthcare personnel during<br>medical/surgical procedures to protect both the wearer and the<br>patient by protecting the wearer against the spatter of blood<br>and other potentially infectious materials and reducing the<br>transfer of microorganisms and other airborne particulate<br>matter.<br>The Willson ONE-Fit Flat-Fold masks also meet the CDC<br>guidelines for TB exposure control within healthcare facilities<br>and are intended for use as an isolation mask. |
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510(k) -- Willson® ONE-Fit™ Flat Fold Healthcare Particle Respirator and Surgical Masks
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Image /page/2/Picture/1 description: The image shows the seal of the U.S. Department of Health and Human Services. The seal features a stylized eagle with three lines representing its wings and body. The eagle faces to the left. Encircling the eagle is the text "DEPARTMENT OF HEALTH AND HUMAN SERVICES - USA" in a circular arrangement.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Survivair Respirators, LLC C/O Mr. Richard O. Wood The Wood Burditt Group 1025 W. Everett Road Lake Forest, Illinois 60045
APR 1 1 2007
Re: K070782
Trade/Device Name: Willson® ONE-Fit Flat-Fold™ Healthcare Particulate Respirator and Surgical Mask, HC-NB095F & HC-NB295F Regulation Number: 21 CFR 878.4040 Regulation Name: Surgical Apparel Regulatory Class: II Product Code: MSH Dated: April 3, 2007 Received: April 4, 2007
Dear Mr. Wood:
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 misbrandi, no and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such 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, EDA coach publish further announcements concerning your device in the Federal Register.
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## Page 2 - Mr. Wood
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); 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.
This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Office of Compliance at (240) 276-0115. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours.
Chiu Lin, Ph.D.
Director Division of Anesthesiology, General Hospital, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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## Indications for Use
## 510(k) Number (if known);
Willson® ONE-Fit™ Flat-Fold™ Healthcare Particulate Device Name: Respirator and Surgical Masks, HC-NB095F & HC-NB295F
Indications For Use:
The Willson® ONE-Fit™ Flat-Fold™ Healthcare Particulate Respirator and Surgical Masks (HC-NB095F & HC-NB295F) are NIOSH-approved N95 single use respirators intended for use by healthcare personnel during medical/surgical procedures to protect both the wearer and the patient by protecting the wearer against the spatter of blood and other potentially infectious materials and reducing the transfer of microorganisms and other airborne particulate matter.
The Willson ONE-Fit Flat-Fold masks also meet the CDC guidelines for TB exposure control within healthcare facilities and are intended for use as an isolation mask.
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)
Sheila P. Murphy, MD
f Anesthesiology, General Hospital,
-ion Control, Central Services
Page 1 of 1
c(k) Number: K010/82
ದ್ದಾ
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.
