Aearo Surgical N95 Respirators, N9508C and N9511 are NIOSH approved N95 respirators intended for single use by operating room personnel and other health care workers to protect both the patients and the health care workers from transfer of microorganisms, blood and body fluids, and airborne particulate materials. This includes use as a procedure mask, isolation mask or dental face mask. This device also meets CDC Guidelines for TB Exposure Control.

Device Description

These masks are molded cup masks, with a center layer of polypropylene meltblown material sandwiched by inner and outer layers of nonwoven material. The mask has 2 elastic headbands. No fiberglass media is used in this product.

AI/ML Overview

Here's an analysis of the provided text regarding the Aearo Company N9508C and N9511C Surgical N95 Respirators, broken down into the requested sections:

1. Table of Acceptance Criteria and Reported Device Performance

Performance Characteristic	Test Method	Acceptance Criteria	Reported Device Performance (N9508C and N9511C)
Fluid Resistance Performance (mmHg)	ASTM F-1862 @ 80 mmHg	29 of 32 must pass (no fluid penetration)	32 of 32 passed (no fluid penetration)
Flammability Class	16 CFR 1610	Flame spread must be within upper and lower control limits; meets Class I	No flame spread on 10 of 10 samples, meets Class I
Filter Efficiency	NIOSH, 42CFR Part 84	>95% Efficient	PASS (>95% Efficient, due to NIOSH N95 approval)
Breathing Resistance (Exhalation)	NIOSH 42CFR Part 84	$\le$ 25 mm H2O @ 85 lpm	PASS ($\le$ 25 mm H2O @ 85 lpm, due to NIOSH N95 approval)
Breathing Resistance (Inhalation)	NIOSH 42CFR Part 84	$\le$ 35 mm H2O @ 85 lpm	PASS ($\le$ 35 mm H2O @ 85 lpm, due to NIOSH N95 approval)
Bacterial Filtration Efficiency	ASTM F2101-01	>99.9%	>99.9% on all samples tested
Biocompatibility: Cytotoxicity	ISO-10993-1 (Agar Overlay)	Cytotoxicity score of 2 or less	Score of 0 (no detectable reactivity)
Biocompatibility: Sensitization	ISO-10993-1 (Closed Patch)	No visible change, Score of 0	No visible change, Score of 0 (None of the patched animals had any visible change at the test site 48 hours after the challenge dose, using albino guinea pigs)
Biocompatibility: Primary Skin Irritation	ISO-10993-1 (Dermal Irritation, 16 CFR 1500 modified)	Negligible, Score of 0	Negligible, Score of 0 (No irritation evident on intact or abraded skin after 24 or 72 hours, using 3 rabbits)

2. Sample Size Used for the Test Set and Data Provenance

Fluid Resistance (ASTM F-1862): 32 masks tested. The provenance is not explicitly stated as retrospective or prospective, but due to it being part of a 510(k) submission for a new device, it would be considered prospective testing specifically for this device. The country of origin for the data is not specified beyond "Nelson Laboratories" which is a US-based lab.
Flammability (16 CFR 1610): 10 samples tested. (Prospective testing by Nelson Laboratories, US).
Filter Efficiency (NIOSH 42CFR Part 84): Not explicitly stated, but would be part of the NIOSH certification process for N95 respirators. The NIOSH approval numbers (TC-84A-4268 and TC-84A-4261) indicate the device has met these requirements. (Prospective testing, likely US-based for NIOSH certification).
Breathing Resistance (NIOSH 42CFR Part 84): Not explicitly stated, but part of NIOSH certification. (Prospective testing, likely US-based).
Bacterial Filtration Efficiency (ASTM F2101-01): "All samples tested," exact number not specified, but typically involves multiple replicates. (Prospective testing by Nelson Laboratories, US).
Biocompatibility (ISO-10993):
- Cytotoxicity: "None of the mask samples tested," exact number not specified. (Prospective testing by Nelson Laboratories, US).
- Primary Skin Irritation: 3 rabbits. (Prospective testing by AppTec Laboratory Services, US).
- Delayed Hypersensitivity/Sensitization: Albino guinea pigs (number not specified, but usually several for animal studies). (Prospective testing by Northview Pacific Laboratories, US).

3. Number of Experts Used to Establish the Ground Truth for the Test Set and Their Qualifications

For this type of device (Surgical N95 Respirators), the "ground truth" is established through standardized laboratory testing protocols (e.g., ASTM, NIOSH, ISO standards) rather than expert consensus on medical images or clinical outcomes.

The experts involved are the qualified laboratory personnel performing these rigorous, standardized tests. Their qualifications are inherent in their ability to correctly execute these specific test methods and interpret their results according to the standards. No specific number or individual qualifications are provided for these lab personnel in the document, as the focus is on the adherence to established test methodologies.

4. Adjudication Method for the Test Set

Not applicable for this type of device testing. The results are quantitative measurements or direct observations (e.g., presence/absence of fluid penetration, flame spread, irritation) that either meet or do not meet predefined criteria. There is no subjective interpretation requiring an adjudication process.

5. If a Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study was done

No, an MRMC comparative effectiveness study was not done. This type of study is relevant for diagnostic devices that rely on human interpretation, often with AI assistance, rather than for performance testing of physical protective equipment.

6. If a Standalone (i.e. algorithm only without human-in-the loop performance) was done

This question is not applicable. The device is a physical N95 respirator, not an algorithm or AI system. The performance tests are themselves "standalone" in the sense that they measure the physical properties and performance of the respirator without a human-in-the-loop component for interpreting the device's function.

7. The Type of Ground Truth Used

The ground truth used for these performance tests is based on:

Standardized Test Methodologies: The acceptance criteria and performance measurements are derived directly from established international and national standards (ASTM, NIOSH, ISO, CFR) for the performance of medical devices and personal protective equipment.
Physical Measurements and Chemical/Biological Assays: The ground truth is confirmed through objective laboratory measurements and assays (e.g., measuring pressure drop, bacterial filtration efficiency, observing fluid penetration, analyzing cellular reactions).

8. The Sample Size for the Training Set

Not applicable. This device is a physical product (respirator), not an AI or machine learning model that requires a training set.

9. How the Ground Truth for the Training Set was Established

Not applicable, as there is no training set for a physical device.

Summary

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K072359

Abbreviated 510(K) For Aearo Company N9508C and N9511C Surgical N95 Respirators

ll 510(k) Summary

NOV 0 8 2007

Company Name and Address

Aearo Company 90 Mechanic Street Southbridge, MA 01550

Contact Person

Ann Phillips Quality Assurance Manager Telephone 508-764-5713 Fax 508-764-5242 E-Mail ann phillips@aearo.com

Manufacturing Facility

Available from Company

Date Prepared

August 14, 2007

Device Name

Trade Name - N9508C and N9511C N95 Respirators Common Name - Surgical Mask or Surgical N95 Respirator

Classification

CFR Section - 21 CFR 878.4040 Device Class - Class II Product Code - MSH - Surgical N95 Respirator

Device Description

Intended Use

These masks are intended for single use by operating room personnel or general health care workers for protection against microscopic organisms, body fluids and particulates. This would include use as a procedure mask, isolation mask or dental face mask.

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Abbreviated 510(K) For Aearo Company N9508C and N9511C Surgical N95 Respirators

ll 510(k)Summary (cont.)

N95 Respirators, N9508C and N9511C have been used in the industrial setting for over a year. They are NIOSH approved N95 respirators, approval numbers TC-84A-4268 and TC-84A-4261. OSHA requlations and the concerns relating to exposure of health care personnel to bloodborne pathogens have brought these types of products into the medical and dental care arenas.

Risk analysis was conducted as recommended in the Guidance Document for Surgical Masks. Adequacy of the fluid resistance was evaluated using ASTM-F 1862-00a. Testing was conducted at 80 mmHg. Acceptance criteria for this test is that 29 of 32 show no fluid penetration. Test results for these masks showed 32 of the 32 masks tested had no fluid penetration. Adequacy of the Mask for air exchange and as a respiratory barrier for bacteria were evaluated at the time of NIOSH certification. In addition, we conducted tests according to ASTM F2101-01, Test Method for Evaluating the Bacterial Filtration Efficiency (BFE) of Medical Face Mask Materials, Using a Biological Aerosol of Staphylococcus aureas at Nelson Laboratories which showed a percent BFE of greater than 99.9% on all samples tested. Assessment of flammability of the mask was conducted according to 16 CFR 1610 and it met Class I requirements showing no flame spread in the tests conducted by Nelson Laboratories. This conforms to the recommendation in the Guidance Document that only class I and class II flammability materials be used in surgical masks intended for use in the operating room. Finally, since surgical masks have parts that come into contact with the skin, biocompatibility was evaluated as described in ISO-10993. Three tests were conducted. Cytotoxicity was evaluated by Nelson Laboratories using the agar overlay method. None of the mask samples tested showed any detectable reactivity. Primary skin irritation was evaluated by AppTec Laboratory Services using rabbits, according to 16 CFR 1500 modified to use 3 animals instead of 6. No irritation was evident on intact or abraded skin after 24 or 72 hours. Delayed Hypersensitivity was evaluated by Northview Pacific Laboratories using the closed patch test NV SOP 16G-60. Albino guinea pigs were used for the test as required by ISO 10993-10, 2002. None of the Pleats Plus patched animals had any visible change at the test site 48 hours after the challenge dose.

This product meets the requirements of the tests recommended for evaluation and risk analysis outlined in the Guidance Document for Surgical Masks. Summary tables with test results for Pleats Plus and the predicate device (including acceptance criteria) and a comparison of the construction of Pleats Plus vs. the predicate device can be found on page 5. Copies of the test reports are in the appendix.

These N95 Respirators are substantially equivalent to the N9504C and N9514C. Surgical N95 Respirators, 510(k) K070168, which are marketed for use as a Surgical Mask.

Aearo Company 510(k) revised 10/18/07

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Abbreviated 510(K) N9508C and N9511C Surgical N95 Respirators

ll 510(k) Summary (cont.)

Devi e and Predicate Device Descriptions/Comparisons

Description	N9508C and N9511C Type N95 Masks	N9504C, N9504CS and N9514C Type N95 Masks, 510(k) K070168
Fabrics	White nonwoven polyester, meltblown polypropylene	White nonwoven polyester, meltblown polypropylene
Nosepiece	Aluminum	Aluminum
Headband	White braided Elastic	Yellow Elastic
Specification and Dimensions	N9508C 4.7" diameterN9511C 5.0" diameter	Small 5.0" diameterLarge 5.5" diameter
Mask Style	Cup	Cup
Design Features	Dual elastic head strap	Dual elastic head strap
NIOSH Certification #	TC-84A-4268 (N9508C)TC-84A-4261 (N9511C)	TC-84A-3715 (N9504C & N9504CS)TC-84A-4272 (N9514C)

Risks to Health

PerformanceCharacteristics	Test Method	Acceptance Criteria/ Results	Predicate DeviceResults
		N9504C, N9504CS and N9514CType N95 Masks	N9504C, N9504CS andN9514C Type N95Masks, 510(k)K070168
Fluid resistancePerformance ( mmHg)	ASTM F-1862@ 80 mmHg	29 of 32 must pass/32 of 32 pass	32/32 pass
Flammability class	16 CFR 1610	Flame spread must be within upperand lower control limits/No flamespread on 10 of 10 samples, meetsClass I	Meets Class I
Filter efficiency	NIOSH, 42CFR Part84	>95% Efficient /PASS	PASS
Breathing resistance:	NIOSH 42CFR Part84	$≤$ 25 mm H20@85 lpm(exhalation)$≤$ 35 mm H2O@85 lpm(inhalation/PASS	PASS
Bacterial FiltrationEfficiency	ASTM F2101-01	>99.9%	>99.9%
Biocompatibility	ISO-10993-1	Cytotoxicity, score of 2 or less/score of 0	Cytotoxicity, score of 2or less/ score of 0
		Sensitization, / No visible change,Score of 0	Sensitization, / Novisible change, Scoreof 0
		Primary Skin Irritation/ Negligible,Score of 0	Primary Skin Irritation/Negligible, Score of 0

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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 AND HUMAN SERVICES - USA" around the perimeter. Inside the circle is a stylized representation of a caduceus, a symbol often associated with medicine and healthcare. The caduceus is depicted with three intertwined strands.

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

NOV 0 8 2007

Ms. Ann L. Phillips Quality Assurance Manager Acaro Company 90 Mechanic Street Southbridge, Massachusetts 01550

Re: K072359

Trade/Device Name: Surgical N95 Respirators N9508C and N9511C Regulation Number: 21 CFR 878.4040 Regulation Name: Surgical Apparel Regulatory Class: II Product Code: MSH Dated: October 4, 2007 Received: October 9, 2007

Dear Ms. Phillips:

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.

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, FDA may publish further announcements concerning your device in the Federal Register.

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Page 2 - Ms. Phillips

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,

Neil Ro. Ogl
Chiu Lin, Ph.D., fyc

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):

Device Name: _________________________________________________________________________________________________________________________________________________________________

Indications For Use:

Prescription Use (Part 21 CFR 801 Subpart D) AND/OR

Over-The-Counter Use x (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 Anesthesiology, General Hospital Infection Control, Dental Devices

677 354 510(k) Number:

Page 1 of 1

Aearo Company 510(k)

8/14/07

Page 6

Regulation Number and Section

§ 878.4040 Surgical apparel.

(a)
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.(b)
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.