surgical mask
Enable an AI agent to recognise a surgical mask, assess its documented capabilities and present condition, and determine whether it is suitable for an intended use, needs replacement or requires further evidence.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise a surgical mask, assess its documented capabilities and present condition, and determine whether it is suitable for an intended use, needs replacement or requires further evidence.
A loose-fitting, disposable medical face covering intended to act as a barrier between the wearer's mouth and nose and the immediate environment, primarily to limit droplet emission from the wearer and to reduce splash and spray reaching the wearer, rather than to provide a sealed, high-efficiency filtration of inhaled air.
It can be Identify the mask and retrieve instructions and evidence for its exact product reference.; Compare documented mask capabilities with externally supplied requirements for an intended task.; Inspect the body, attachments and packaging for conditions affecting use.; Guide orientation and adjustment using product instructions, and record observed coverage.; Flag replacement, withholding from use or evidence review when condition or suitability is unresolved.; Route a used mask to an applicable disposal process using its use context..
Distinguishing features
Check whether traceable labelling identifies the product for surgical or medical mask use; pleats, colour and ear loops alone do not establish that identity.
Distinguish documented surgical-mask performance from an unsupported claim that an item is merely a disposable face mask.
Check whether respirator approval is also claimed and verified; a product carrying both designations requires a linked respirator model.
Inspect for a mask body covering the nose and mouth with wearer attachments, distinguishing it from a transparent face shield.
Determine whether documented performance concerns the mask material or a tested product, rather than assuming it establishes a seal on the wearer.
Scope
+ Identification as a surgical mask from intended-use labelling and traceable product evidence
+ Mask body, filtering material, nose adjustment and attachment construction
+ Documented filtration, breathing resistance and fluid-barrier performance
+ Coverage, orientation and attachment on a particular wearer
+ Packaging, storage, use history and replacement condition
- Respirators and their respiratory-protection programmes
- Cloth face coverings and nonmedical disposable masks
- Face shields, protective eyewear and other protective equipment
- Clinical diagnosis, treatment and procedure-specific infection-control policy
- Manufacturing operations and laboratory test methods as independent systems
- Waste-management infrastructure and jurisdiction-wide disposal rules
Characteristics
- Product designation
- Exact labelled designation; verified surgical mask, ambiguous or unverified Establishes whether the item belongs to this model.
- Product and batch traceability
- Manufacturer, product reference, lot or batch and supporting records Connects an individual mask to the evidence and instructions that apply to it.
- Barrier-performance evidence
- Test reports and declarations with method, edition, tested sample and result Allows capability claims to be assessed without treating unlike tests as interchangeable.
- Reported filtration efficiency
- Percent, separately identified by challenge type and test method Records a specific test result without implying equivalent protection in every exposure.
- Reported breathing resistance
- Value and unit as reported, with airflow, test area and method where available Supports interpretation of airflow resistance under the documented test conditions.
- Reported fluid-barrier performance
- Challenge pressure and unit, method and pass/fail result; unknown if undocumented Distinguishes supported splash-barrier claims from assumptions.
- Attachment and nose adjustment
- Ear loops, ties or other attachment; adjustable nose element present, absent or unknown Determines how the mask can be positioned and retained.
- Wearer coverage
- Nose and mouth covered or uncovered; stable or slipping; observed edge gaps Captures the actual wearing condition separately from product test results.
- Mask condition
- Dry or damp; intact or damaged; visibly clean or soiled; contamination history known or unknown Supports a replacement decision under applicable instructions.
- Use and package status
- Unopened, opened-unused, worn or discarded; package intact or compromised; labelled expiry status Prevents an uncertain or previously used item from being treated as new.
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 17 findings · 29 questions.
Surgical-mask identity Establishes what the item is and which product claims apply to it.
Visually similar face coverings can have different intended uses and evidence.
Designation and boundaries
Separates surgical-mask identity from appearance and adjacent protective-device categories.
Labelled mask role
Record the exact intended-use designation and any additional respirator designation without inferring either from shape.
- What exact wording identifies this product as a surgical or medical mask, and how does that wording map to this registry entry? definition
- Does the product also claim a respirator designation that requires a linked model and separate evidence? boundary
Mask evidence traceability
Connects the physical mask to the packaging, instructions and records supporting its identity.
Product-to-item link
Record how the mask is associated with a manufacturer, product reference and batch, including uncertainty for loose masks.
- Which packaging or supply record links this mask to its product reference and batch? provenance
- If the mask is loose or repackaged, which identity and performance claims can still be substantiated? boundary
Mask body and barriers Records construction and the evidence supporting filtration, airflow and fluid-barrier claims.
A surgical mask's relevant capabilities depend on its construction and documented tests, not its appearance alone.
Body construction
Describes the mask body and features relevant to coverage and integrity.
Body materials and geometry
Record documented materials, body dimensions, seams and shaping features, distinguishing documentation from inspection.
- What body dimensions, pleats or shaped features determine the mask's available coverage? measurement
- Which material and layer descriptions are documented for this product, and which remain unknown? provenance
Tested barrier capabilities
Keeps each performance claim attached to its test conditions and applicable product.
Filtration and airflow results
Record filtration and breathing-resistance results with enough context to interpret their limits.
- What filtration results are reported, with which challenge types, test methods and tested product references? measurement
- What breathing-resistance result is reported, in which units and under what airflow and test-area conditions? measurement
Fluid-barrier claim
Record whether resistance to fluid penetration is supported and what the evidence actually establishes.
- Which report supports the fluid-barrier claim for this exact product? provenance
- What challenge pressure, method and outcome are recorded, and what intended-use limits accompany them? measurement
Wearer interface Describes how the mask is oriented, attached and maintained over the wearer's nose and mouth.
Product-level test results do not establish the wearing condition of an individual mask.
Orientation and fastening
Records the features and instructions needed to position and secure this mask.
Correct placement
Identify the intended inner face, upper edge, fastening method and available adjustments.
- How do the manufacturer's instructions identify the inner face and upper edge without relying on an assumed colour convention? provenance
- How should this product's ties, loops and nose element be adjusted to obtain stable coverage? action
Coverage during use
Captures observed coverage and compatibility with the wearer's activity and other equipment.
Coverage and displacement
Record slipping, exposed nose or mouth, edge gaps and interference without equating visual inspection with a respirator fit test.
- Does the mask remain over the nose and mouth during the intended movement and speech? measurement
- Do eyewear or other equipment displace the mask or prevent its attachments from functioning? boundary
- If stable coverage cannot be obtained, what alternative size or product is allowed by the applicable instructions? action
Use readiness and retirement Tracks whether the mask can enter use, remain in use or should leave use.
A mask's suitability depends on its current condition and use history as well as its original specification.
Pre-use readiness
Assesses packaging, storage and physical condition against product instructions and task requirements.
Ready for intended task
Combine inspection and traceable instructions with externally defined requirements while preserving unresolved suitability questions.
- Are the mask body, seams, attachments and relevant packaging intact, and is labelled expiry information available? measurement
- Do storage history, any sterility claim and documented performance satisfy the supplied requirements for this task? boundary
- Which missing evidence or failed condition requires the mask to be withheld from use? action
Replacement and disposal
Records changes during use and connects removal to the applicable handling and waste process.
End-of-use decision
Track dampness, soiling, damage, handling and prior use against documented replacement and reuse restrictions.
- Has the mask become damp, soiled, damaged, displaced or otherwise reached a replacement condition in the applicable instructions? measurement
- What do the product instructions and applicable policy permit after removal, including any proposed reuse or processing? action
- Which removal and disposal process applies given the mask's use and contamination history? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Type I (EN 14683) - bacterial filtration for patients and others, not for clinical staff in high-risk procedures
- Type II (EN 14683) - higher bacterial filtration, general medical use by healthcare workers
- Type IIR (EN 14683) - Type II with splash resistance for procedures with fluid exposure
- ASTM Level 1 - low barrier, for procedures with low fluid exposure
- ASTM Level 2 - moderate barrier, for procedures with moderate fluid exposure
- ASTM Level 3 - high barrier, for procedures with high fluid exposure
- Procedure / isolation mask - often the same construction as a surgical mask, sold for patient or visitor use rather than sterile surgical fields
- Tie-on versus ear-loop - fastening variants of the same barrier class
- Which of these kinds and varieties hold for the sense of surgical mask this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q182749 - item 'surgical mask'
- GMDN - 35177 - Mask, surgical, single-use (verify against current GMDN term)
- UMDNS / ECRI - 12-454 - Masks, Surgical (historical UMDNS code; confirm against current ECRI Universal Medical Device Nomenclature)
- FDA product code - FXX - Mask, Surgical (21 CFR 878.4040)
- HS / CN - 6307.90 - textile made-up articles; medical masks commonly classified here or under 9018 depending on construction and jurisdiction
- Which of these identifiers and schemes hold for the sense of surgical mask this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- EN 14683 (CEN) - Medical face masks: requirements and test methods; Types I, II, IIR
- ASTM F2100 (ASTM International) - Performance of materials used in medical face masks; Levels 1, 2, 3
- ISO 22609 (ISO) - Clothing for protection against infectious agents - Medical face masks - Test method for resistance against penetration by synthetic blood
- ISO 10993 series (ISO) - Biological evaluation of medical devices (biocompatibility of materials contacting skin)
- 21 CFR 878.4040 (US FDA) - Surgical apparel; surgical masks as Class II medical devices, typically 510(k)
- NIOSH 42 CFR Part 84 (US CDC/NIOSH) - does not certify surgical masks; relevant because 'surgical N95' products must meet both NIOSH respirator and FDA surgical-mask requirements
- EU Medical Device Regulation (EU) 2017/745 - medical face masks as medical devices with CE marking under EN 14683
- YY 0469 / YY/T 0969 (NMPA, China) - surgical mask and disposable medical face mask requirements on the Chinese market
- Which of these standards and regulation hold for the sense of surgical mask this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Worn by surgeons and circulating staff in operating rooms as source control and splash protection, typically over a sterile field
- Worn by nurses, dentists, and clinic staff during examinations, wound care, and aerosol-adjacent but not respirator-required procedures
- Issued to infectious or coughing patients as source control in wards, waiting rooms, and transport
- Stocked as procedure masks in emergency departments, ambulances, and dental operatories
- Distributed to the public during epidemic waves as a medical-looking alternative to cloth coverings, often without fit testing
- Used in food processing, clean assembly, and some laboratory settings as a droplet/spit barrier rather than as PPE against airborne hazards
- Which of these real-world use hold for the sense of surgical mask this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Bacterial filtration efficiency (BFE) - ≥95 (Type I / ASTM Level 1) to ≥98 (Type II / IIR / ASTM Level 2-3) - %
- Particle filtration efficiency (PFE) at ~0.1 µm (ASTM) - ≥95 (Level 1) to ≥98 (Level 2-3) - %
- Differential pressure (breathability, EN 14683) - <40 (Type I) to <60 (Type II / IIR) per cm²; ASTM ΔP typically <5.0 mm H2O/cm² (Level 1) to <6.0 (Levels 2-3) - Pa/cm² or mm H2O/cm²
- Synthetic-blood splash resistance - Type IIR and ASTM Level 1 at 80 mmHg; Level 2 at 120 mmHg; Level 3 at 160 mmHg - mmHg
- Face coverage (nose-chin length of mask body) - approximately 90-120 adult, smaller for paediatric sizes - mm
- Intended duration of continuous wear - typically one procedure or up to about 2-4 hours; discarded when wet, soiled, or damaged - h
- Which of these typical measurements hold for the sense of surgical mask this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Leakage around the unsealed edges: most inhaled and exhaled air bypasses the filter media, so performance is not equivalent to a fitted respirator
- Wetting and saturation from breath, sweat, or splash reduces filtration and increases breathing resistance
- Ear-loop or tie failure, nosepiece deformation, and gaping at the cheeks after talking or movement
- Touching the contaminated outer surface then the face or eyes (self-inoculation)
- False sense of protection against airborne pathogens (measles, tuberculosis, SARS-CoV-2 aerosols) when a respirator is indicated
- Flammability in oxygen-enriched or laser/electrosurgery environments if the mask is not rated for that use
- Counterfeit or substandard lots that fail BFE, splash, or bioburden claims
- Skin irritation, acne, and pressure marks from prolonged wear; rare latex or other material allergy depending on construction
- Which of these failure modes and hazards hold for the sense of surgical mask this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Europe and much of the world label medical face masks Type I / II / IIR under EN 14683; Type I is not intended for clinical staff
- United States uses ASTM F2100 Levels 1-3 and FDA 510(k) clearance; 'surgical mask' and 'procedure mask' are often used interchangeably in hospitals
- China distinguishes YY 0469 surgical masks from YY/T 0969 disposable medical face masks, with different splash and filtration requirements
- In public and retail speech, 'surgical mask' is often used for any pleated 3-ply disposable mask, including non-medical commodity masks
- Japan and Korea commonly use ear-loop 'medical' or 'hygiene' masks in daily life; regulatory classes still separate medical devices from general-use masks
- Some health systems require tie-on masks in sterile theatres and allow ear-loops only as procedure masks
- Which of these regional variation hold for the sense of surgical mask this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- N95 / FFP2 / KN95 filtering facepiece respirator - A respirator is designed to seal to the face and be certified for inward leakage and particle filtration of inhaled air (NIOSH 42 CFR 84, EN 149); a surgical mask is not fit-tested and is primarily source control plus splash barrier.
- Surgical N95 (medical respirator) - Meets both NIOSH respirator certification and FDA surgical-mask (fluid resistance, flammability, biocompatibility) requirements; a plain surgical mask meets only the latter class of claims.
- Cloth / community face covering - Not a medical device under EN 14683 or 21 CFR 878.4040; typically washable textile without claimed BFE/PFE or splash rating.
- Barrier face covering (ASTM F3502) - A US consumer/workplace covering with specified leakage and filtration tests, explicitly not a surgical mask or respirator.
- Respirator with exhalation valve - Protects the wearer but can emit unfiltered exhaled droplets; a surgical mask is intended as source control and has no exhalation valve.
- Face shield - A visor for splash to the eyes and face; it does not cover the mouth and nose as a filtration barrier and is complementary, not a substitute, for a mask.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of surgical mask this model covers, and on what evidence? provenance
Sources
- EN 14683: Medical face masks - Requirements and test methods - European classification Type I / II / IIR, BFE, splash resistance, and intended medical use
- ASTM F2100 Standard Specification for Performance of Materials Used in Medical Face Masks - US performance levels 1-3 (BFE, PFE, differential pressure, fluid resistance, flammability)
- N95 Respirators, Surgical Masks, Face Masks, and Barrier Face Coverings - Regulatory distinction among surgical masks, N95 respirators, face masks, and barrier face coverings in the United States
- Respirators and surgical masks: A comparison - Fit, filtration, and intended-use differences between surgical masks and NIOSH-approved respirators
What the second pass must settle
- Does the registry intend surgical mask to include every product labelled medical or procedure mask, or only a narrower designation?
- How should products with both surgical-mask and respirator designations link to neighbouring models while preserving one source of truth?
- Which current standards and jurisdiction-specific designations should be recognised, and how should their differing test results be represented without implying equivalence?
- What minimum evidence is sufficient to identify a loose mask and associate it with product-level performance claims?
- Which replacement, reuse, storage and sterility conditions can be generalised, and which must remain specific to product instructions and local policy?