syringe
Enable an AI agent to recognise a syringe, assess its recorded condition and suitability for an intended task, and identify permitted actions and unresolved constraints.
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 syringe, assess its recorded condition and suitability for an intended task, and identify permitted actions and unresolved constraints.
A syringe is a piston-driven, typically disposable, medical device consisting of a calibrated barrel and a sliding plunger that draws, measures, and expels a liquid through a Luer or Luer-lock nozzle, most often into or from a hypodermic needle, catheter, or other fitting.
It can be Identify the syringe and retrieve its applicable markings and instructions.; Inspect the barrel, actuator, outlet, packaging and integral safety features.; Read or measure contents volume within documented scale and accuracy limits.; Check a proposed attachment or driving device against documented compatibility.; Represent authorised filling or expelling actions with their prerequisites and resulting contents state.; Flag, segregate or route the syringe for handling, reprocessing or disposal according to its designation and recorded condition..
Distinguishing features
Identify a fluid chamber connected to an outlet and a mechanism that changes chamber volume; record whether displacement uses a plunger, bulb or another mechanism.
Distinguish a syringe from a needle or cannula by the presence of the fluid chamber and displacement mechanism rather than merely a hollow conduit.
Distinguish a syringe from a passive vial or reservoir by its mechanism for actively drawing in or expelling contents.
For a cartridge, pipette or integrated injector, determine whether the registered object is the syringe component or the larger dispensing device; appearance and graduations alone do not settle the boundary.
Scope
+ Syringe identity, intended application and mechanism
+ Barrel capacity, graduations and relevant dimensional specifications
+ Outlet, seals, integral components and attachment compatibility
+ Packaging, cleanliness, sterility claims, damage and use history
+ Contents state, operating limits and reuse or disposal constraints
- Medication selection, prescribed dose and clinical treatment decisions
- Chemical or biological properties of the contained substance
- Detailed construction and condition of detachable needles and tubing
- Control logic and performance of syringe pumps or injectors
- Patient anatomy, injection-site selection and procedural technique
- Waste-management infrastructure and organisation-wide infection-control policy
Characteristics
- Intended application
- Manufacturer-stated application, such as injection, enteral delivery, irrigation, laboratory transfer or other; unknown Constrains suitable connections, substances and actions without inferring suitability from appearance.
- Displacement mechanism
- Plunger, bulb, other documented mechanism, unknown Determines recognition criteria and how filling and emptying are represented.
- Nominal capacity
- mL or µL, with manufacturer-stated meaning Establishes the labelled volume range without assuming it equals total physical chamber volume.
- Graduation scheme
- Labelled scale unit, smallest division and scale range; ungraduated; unreadable; unknown Determines how readings can be interpreted and prevents unsupported conversion of specialised scales.
- Specified volume accuracy
- Absolute or relative tolerance with applicable volume range, test conditions and source; unknown Separates readable divisions from substantiated measurement or delivery performance.
- Outlet interface
- Documented connector designation, geometry and locking method; integral needle; other; unknown Supports compatibility checks without treating physical attachment as proof of appropriate use.
- Connected component
- Reference to attached needle, cap, tubing, adapter or driving equipment, with connection state Makes the current assembly explicit while preserving neighbouring model boundaries.
- Residual volume
- mL or µL with assembly configuration, measurement method and conditions; unknown Allows retained contents to be distinguished from the indicated or displaced volume.
- Contents state
- Empty, filled, partially filled, residual contents or unknown, with substance reference and observed gas presence Supports identification and handling decisions without assuming that contents are known or suitable.
- Barrier and sterility evidence
- Packaging integrity, opening history, labelled sterility claim and applicable expiry; unknown where unsupported Prevents visual cleanliness or an intact-looking device from being treated as proof of sterility.
- Mechanical condition
- Observed barrel, outlet, seal and actuator condition, including defects, test results or unassessed Records evidence relevant to leakage, movement and structural suitability.
- Use designation and history
- Labelled single-use or reusable designation; unused, previously used, reprocessed or unknown history Keeps manufacturer designation separate from actual history and supports handling restrictions.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.syringe
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 28 questions.
Identity and device boundary Establishes what syringe is present and which components belong to the modelled object.
Syringes can appear alone, prefilled or embedded in larger devices, and their intended applications cannot reliably be inferred from shape.
Recognition and application
Records evidence that identifies the syringe and its intended role.
Mechanism and labelled purpose
Record the chamber, outlet and displacement mechanism together with the stated application and identification evidence.
- What chamber and displacement mechanism establish that this object is a syringe? definition
- Which markings or manufacturer documentation establish its identity and intended application? provenance
Assembly boundary
Separates integral syringe parts from contents, attachments and enclosing devices.
Integral and associated components
Record whether a needle, cap, safety mechanism or actuator is integral, detachable or part of another device.
- Which components belong to this syringe instance, and which require references to separate objects? boundary
- If supplied prefilled or inside an injector, where does the syringe boundary end? boundary
Volume and delivery evidence Captures what the syringe scale and displacement can substantiate about volume.
Capacity, indicated volume, expelled volume and residual volume must remain distinguishable.
Capacity and scale
Records labelled capacity and the interpretation of any graduations.
Readable volume range
Record scale units, range, divisions, legibility and the documented reference point used for reading.
- What are the nominal capacity, scale units and smallest marked division, or is the syringe ungraduated? measurement
- What documented reading convention and tolerance apply to this syringe and volume range? provenance
Displacement and retention
Relates chamber readings to transfer and retained contents under stated conditions.
Delivered and residual volume
Record delivery or residual-volume evidence with the tested syringe configuration and method.
- What residual volume is specified or measured for the syringe with its current outlet attachments? measurement
- What evidence supports relating the indicated volume to the volume actually transferred under the intended conditions? measurement
Connections and operating fit Records outlet compatibility and constraints imposed by materials, attachments and driving equipment.
A connection that physically fits does not by itself establish application compatibility or acceptable operation.
Outlet and attachments
Identifies the outlet and the evidence for using it with a proposed component.
Connection compatibility
Record connector designation, attachment identity, engagement state and documented compatibility.
- What outlet designation and locking or engagement mechanism does this syringe have? definition
- What documentation establishes compatibility with the proposed needle, tubing, cap or adapter for this application? provenance
Materials and driving constraints
Captures application-specific material and mechanical limits.
Supported operating configuration
Record relevant wetted materials and any specified constraints for manual or equipment-driven operation.
- Which documented material-compatibility and operating limits apply to the intended contents and conditions? provenance
- If driven by a pump or injector, what evidence confirms support for this syringe model and configuration? action
Contents and condition Records the syringe's current contents and evidence about its physical and contamination-related state.
An apparently intact syringe may still have unknown contents, compromised packaging or an undocumented use history.
Fill and identification
Tracks contents identity, amount and observable chamber state.
Current contents evidence
Separate observed fill state from substantiated substance identity and preparation history.
- What contents volume, residual contents and visible gas are observed, and how were they assessed? measurement
- What label, preparation record or other evidence identifies the contents and when they entered this syringe? provenance
Integrity and barrier state
Records mechanical defects and the evidence supporting cleanliness or sterility claims.
Condition evidence and unknowns
Record barrel, seal, outlet and actuator observations alongside packaging status, labelled claims and relevant dates.
- What cracks, leakage, deformation, seal defects or abnormal actuator movement have been observed or tested? measurement
- What packaging, opening-history and expiry evidence supports the recorded sterility status, and what remains unknown? provenance
Use controls and end state Connects device designation and current state to permitted handling and final disposition.
Use restrictions and safety mechanisms affect which transitions remain available after opening, filling or use.
Action prerequisites
Records prerequisites for proposed syringe actions without prescribing a clinical procedure.
Permitted use transition
Associate a proposed filling, connection or expelling action with applicable instructions, condition evidence and task authorisation.
- Which instructions and task requirements govern the proposed action on this syringe? action
- Which unresolved identity, contents, compatibility or condition issues prevent deciding whether the action is permitted? action
Reuse and safety state
Tracks use history, any protective or disabling mechanism and the next permitted disposition.
Post-use disposition
Record the labelled reuse designation, actual history, safety-feature state and applicable handling route.
- What evidence establishes the single-use or reusable designation and any previous use or reprocessing? provenance
- What state is any protective or disabling mechanism in, and what handling, reprocessing or disposal action is permitted next? 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.
- hypodermic (needle-and-syringe) for injection and aspiration
- insulin syringe (fixed or attached fine needle, typically U-100)
- tuberculin syringe (1 mL, 0.01 mL graduations)
- oral/enteral syringe (non-Luer tip; ENFit/ISO 80369-3)
- prefilled syringe (drug-device combination, often staked needle)
- safety syringe (retractable or shielded needle)
- glass reusable syringe (laboratory or specialty clinical)
- catheter-tip / irrigation syringe (large-volume, blunt tip)
- Which of these kinds and varieties hold for the sense of syringe 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 - Q5349 - Wikidata item for syringe
- GMDN - GMDN preferred terms in the syringe family (e.g. hypodermic syringe, insulin syringe, oral/enteral syringe) - Global Medical Device Nomenclature used in UDI/GUDID device classification
- UMDNS - UMDNS 13-912 (Syringes) and more specific codes by type - Universal Medical Device Nomenclature System
- ISO 7886 series - ISO 7886-1 / -2 / -3 / -4 product standards as type identifiers - Part 1 manual hypodermic; Part 2 pumps; Part 3 auto-disable; Part 4 reuse-prevention
- UDI / GTIN - Device-specific GTIN + production identifiers on labelled sterile syringes - FDA UDI and EU MDR unique device identification
- Which of these identifiers and schemes hold for the sense of syringe 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.
- ISO 7886-1:2017 Sterile hypodermic syringes for single use - Part 1: Syringes for manual use (ISO)
- ISO 7886-3 Auto-disable syringes for immunization (ISO)
- ISO 7886-4 Syringes with reuse-prevention features (ISO)
- ISO 80369-3 Enteral small-bore connectors / ENFit (ISO)
- ISO 80369-7 Connectors for intravascular or hypodermic applications (Luer) (ISO)
- ISO 23908 Sharps injury protection - requirements and test methods (ISO)
- EU Medical Device Regulation (EU) 2017/745 - syringes as medical devices / combination products (European Union)
- FDA 21 CFR 880.5860 Piston syringe (Class II) (US FDA)
- WHO / UNICEF auto-disable syringe specifications for immunization programmes (WHO, UNICEF)
- Which of these standards and regulation hold for the sense of syringe 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.
- Intramuscular, subcutaneous, intradermal, and intravenous injection of drugs, vaccines, and biologics in clinics, hospitals, and pharmacies
- Aspiration of blood, body fluids, or drug from vials/ampoules before administration
- Insulin self-administration with dedicated U-100 syringes
- Oral/enteral dosing of liquid medicines, especially in paediatrics, using ENFit syringes to prevent Luer misconnection
- Irrigation of wounds, ears, or catheters with catheter-tip syringes
- Laboratory handling of small liquid volumes with glass or disposable syringes
- Immunization campaigns using auto-disable syringes that lock after a single use
- Which of these real-world use hold for the sense of syringe 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.
- nominal capacity - 0.3-60 (common clinical: 1, 3, 5, 10, 20, 50/60) - mL
- graduation interval - 0.01 (tuberculin/insulin) to 1-2 (large irrigation) - mL
- needle gauge (when supplied) - 18-31 - G (Stubs gauge)
- needle length (when supplied) - 6-50 - mm
- dead space (residual volume) - low-dead-space designs often <0.05; conventional higher - mL
- force to move plunger (ISO 7886-1 test) - within standard-specified limits for the size - N
- Which of these typical measurements hold for the sense of syringe 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.
- Needlestick injury to healthcare workers after use
- Reuse of single-use syringes transmitting blood-borne pathogens (HBV, HCV, HIV)
- Wrong-route administration from Luer misconnection (e.g. oral/enteral liquid given IV) - mitigated by ISO 80369 / ENFit
- Dosing error from reading the wrong scale (insulin U-40 vs U-100; tuberculin vs insulin)
- Plunger-stopper leakage, air embolism if air is injected IV, or inaccurate volume from worn/loosened stopper
- Needle detachment or Luer slip disconnection under pressure
- Particulate or silicone-oil contamination of injectables from syringe barrels (especially prefilled biologics)
- Sharps-container overflow and unsafe disposal in community settings
- Which of these failure modes and hazards hold for the sense of syringe 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.
- Insulin: U-100 is standard in the US, EU, and most high-income settings; U-40 syringes/vials persist in some markets and cause mix-up risk
- Enteral connectors: ENFit (ISO 80369-3) adopted widely in US, EU, Australia, Japan; residual use of legacy oral syringes/Luer in some facilities
- Immunization: WHO/UNICEF programmes in many LMICs require auto-disable (AD) syringes; reusable glass syringes historically used and now discouraged
- UK/EU often specify 'ml' syringes with Luer lock for IV; US hospitals commonly stock both Luer slip and Luer lock by department
- Japan and some Asian markets historically used unique connector practices; ISO 80369 is the convergence path
- Which of these regional variation hold for the sense of syringe 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.
- hypodermic needle - The needle is the hollow sharp cannula; the syringe is the barrel-and-plunger assembly that may or may not be supplied with a needle.
- pen injector / insulin pen - A cartridge-based, dial-dose injector, not a piston barrel with printed graduations; dose is set by a click mechanism rather than reading a scale.
- autoinjector / jet injector - Spring- or gas-driven delivery, often needle-hidden or needle-free; not a manually advanced plunger in an open barrel.
- pipette / micropipette - Air-displacement laboratory volumetric tool with a disposable tip, not a medical Luer piston syringe for parenteral or enteral use.
- cannula / IV catheter - An indwelling vascular access tube; a syringe may attach to it but is not the access device itself.
- oral dosing cup or dropper - Open or bulb devices without a piston barrel and without a small-bore connector standard.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of syringe this model covers, and on what evidence? provenance
Sources
- ISO 7886-1:2017 Sterile hypodermic syringes for single use - Part 1: Syringes for manual use - International product standard defining sterile single-use hypodermic syringes for manual use.
- ISO 80369-3:2016 Small-bore connectors for liquids and gases in healthcare applications - Part 3: Connectors for enteral applications - Standard for ENFit/enteral connectors that distinguish oral/enteral syringes from Luer hypodermic syringes.
- WHO best practices for injections and related procedures toolkit - Global injection-safety practice, reuse hazards, and preferred use of auto-disable syringes for immunization.
- Technical Considerations for Pen, Jet, and Related Injectors Intended for Use with Drugs and Biological Products (FDA guidance) - US regulatory framing of syringes and related injectors as drug-delivery devices.
What the second pass must settle
- Does this registry entry include bulb syringes, gas-tight laboratory syringes and syringe components inside integrated injectors, or do neighbouring entries own some of these forms?
- Which primary sources and applicable standards establish recognition criteria and connector designations across the included syringe families?
- Which volume-reading conventions, accuracy specifications and residual-volume test methods apply to each included family?
- What evidence is sufficient to establish material compatibility and equipment compatibility for a particular syringe configuration?
- Which manufacturer instructions and application-specific rules determine reuse, reprocessing, safety-feature operation and disposal for the included variants?