anus
Enable an AI agent to recognise an anus, record its condition and functional context, and identify what observation, care or further assessment is appropriate.
Bundle → Layer → Finding → Questions Filled
5 bundles · 10 layers · 10 findings · 21 questions
Outlet identity Establish which opening is being represented and where the model ends.
Anatomical recognition
Identify the opening within the organism's anatomy.
Terminal outlet identification
Record the evidence supporting identification as an anus and any competing interpretation.
- What species and anatomical landmarks support identifying this opening as the anus? definition
- Does that identification come from direct observation, a clinical record or an unverified description? provenance
Local ownership boundary
Separate the opening and margin from connected or surrounding structures.
Opening, margin and neighbours
Locate each observation relative to the anal opening, anal canal and perianal skin.
- What operational boundary defines the immediate anal margin in this record? boundary
- Which observations belong to the anal canal, rectum or surrounding skin and need linked records? boundary
Opening configuration Describe the opening's arrangement, passage status and anatomical history.
Position and patency
Record what is observable about position, number and passage.
Opening and passage evidence
Keep visible configuration separate from evidence that material can pass.
- How many candidate openings are identified, and where are they relative to documented anatomical landmarks? measurement
- What observation or qualified assessment supports patency, and when was it obtained? provenance
Developmental and surgical context
Represent known variation or alteration without inferring its cause from appearance.
Documented outlet history
Link relevant congenital descriptions, reconstruction or other procedures to the present opening.
- What records document congenital variation, reconstruction or procedures affecting this opening? provenance
- Does the observed anatomy remain within this anus model, or require a linked stoma, fistula or malformation model? boundary
Passage and control Record outlet function while separating observation from explanation.
Evacuation at the opening
Capture passage events and difficulties specifically associated with the outlet.
Passage event pattern
Record what passes, when it passes and any reported difficulty or discomfort.
- What stool, gas or other material has been reported or observed passing through this opening, and over what period? measurement
- Is difficulty localised to the opening by evidence, or only inferred from a broader defecation complaint? boundary
Leakage and closure context
Describe unintended passage and related assessments without diagnosing sphincter dysfunction.
Control observations
Record leakage circumstances and link any competent assessment of associated continence structures.
- What unintended passage occurs, with what frequency, awareness and circumstances? measurement
- Which findings about closure or sphincter function were actually assessed, by whom and using what method? provenance
Margin condition and symptoms Represent visible tissue changes and experienced symptoms at the opening.
Visible margin condition
Describe surface integrity and local changes without assigning unsupported disease labels.
Localised tissue change
Record wounds, swelling, protruding tissue or other changes by location and observable properties.
- What change is visible, and how are its location, extent and dimensions recorded? measurement
- Is the change in the anal margin, adjacent skin or tissue emerging from within the canal? boundary
Symptom and material attribution
Capture local symptoms and uncertain origins of blood or discharge.
Symptom course and origin
Keep reported sensations and observed material distinct from conclusions about their source.
- What pain, itching, burning, bleeding or discharge is reported, with what onset, severity and relation to defecation or contact? measurement
- What evidence localises blood or discharge to the anal margin rather than the bowel, surrounding skin or another opening? provenance
Examination and local care Determine which observations and actions are supported by consent, evidence and an appropriate care context.
Examination authority and limits
Record permission, method, tolerance and the actual extent of examination.
Authorised observation
Distinguish reported information, external inspection and examination extending into the anal canal.
- What consent or applicable authorisation covers the proposed observation or examination? action
- What method was used, what area was examined, and what could not be assessed because of access, discomfort or other limitations? provenance
Care and assessment decisions
Connect local needs to established care instructions and qualified assessment.
Supported next action
Record the basis for local care, further assessment or deferral of a proposed intervention.
- Which hygiene, skin protection or other local actions are supported by the current care plan and observed margin condition? action
- Which symptoms, anatomical uncertainties or changes require qualified assessment under the applicable clinical or veterinary guidance? action
- Does the proposed action involve insertion, dilation or treatment that requires separate procedural authority and an anal canal or procedure model? boundary
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
- Other names and narrower kinds
- human female anus, human male anus, horse anus, dog anus, cat anus, human anus, bussy
What it is Filled
This model owns the terminal digestive opening and its immediate margin, with explicit boundaries and relations to the anal canal, continence structures and surrounding tissues; species and anatomical variation must be recorded rather than assumed.
In scope
- Identity, anatomical position and evidence that the opening is an anus
- Presence, number, configuration and observed patency of the opening
- Condition of the anal margin and changes localised to it
- Passage, leakage and closure observations attributed to this opening
- Local symptoms, examination limitations and constraints on contact or care
Out of scope
- The rectum and upstream digestive tract as organs
- Detailed internal anatomy and disease of the anal canal
- Pelvic floor and sphincter structures as independently modelled anatomical entities
- Whole-organism digestive, neurological and continence disorders
- Genital and urinary openings and their disorders
- Abdominal bowel stomas and fistulous openings as distinct anatomical entities
Why it exists Filled
Enable an AI agent to recognise an anus, record its condition and functional context, and identify what observation, care or further assessment is appropriate.
Distinguishing features Filled
- Establish whether anatomical context identifies the opening as the terminal digestive outlet, rather than a urinary or genital opening.
- Distinguish the external opening and immediate margin from the anal canal extending inward and the rectum farther upstream.
- Distinguish the opening itself from surrounding perianal skin; proximity alone does not make a skin finding part of the anus.
- Check whether an observed opening is the anatomical anus, a surgically created bowel outlet or an abnormal tract.
- In species with a shared terminal chamber or outlet, establish whether the observed structure should be represented as an anus or a cloacal opening.
What robots and AI may and may not do Filled
Must not
- Diagnose anal disease, including cancer, in a specific person without a clinician.
- Create, request or share sexual or intimate images of a person.
- Share a patient's examination findings or images beyond their care team.
- Mock or shame people about anal conditions or continence problems.
Only with a human decision
- Any examination or treatment decision for a patient.
May
- Explain anal anatomy and common conditions from medical sources in plain clinical language.
- Advise people with bleeding, severe pain or changes in bowel habit to see a clinician.
Moral aspects Filled
- Embarrassment keeps people from seeking care for treatable conditions; respectful information matters.
- Intimate examinations require consent and dignity.
Who is affected
- Patients
- People with incontinence
- Clinicians
Owners Filled
Steward
The patient with their treating clinicians; nobody owns the anatomical structure.
Links to other meta-models Filled
parent
- Q112826975 - registry parent class
- Q546776 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.anus
- Wikidata: Q497 (https://www.wikidata.org/wiki/Q497)
Direct properties required Filled
- Organism and anatomical context: Organism reference, species and relevant developmental or surgical context
- Identification status: Confirmed, suspected, indeterminate, not identified
- Opening configuration: Single identified opening, multiple candidate openings, no opening identified, indeterminate; position described separately
- Observed patency: Passage observed, assessed as patent, suspected obstruction, unassessed; method and time required
- Local lesion dimensions: Millimetres, with anatomical location, method and observation date
- Anal margin condition: Observed integrity, irritation, swelling, wound or other described change; unknown permitted
- Passage and leakage pattern: Reported or observed stool, gas or fluid passage; voluntary control, timing and uncertainty recorded
- Local symptom burden: Pain, itching, burning, bleeding or other reported symptom; severity, duration and triggers
- Associated anatomical structures: References to anal canal, sphincter complex, perianal skin and relevant altered anatomy
Recognition required Filled
- The terminal opening of the digestive tract between the buttocks, surrounded by pigmented skin folds.
- In clinical images, the anal margin with the sphincter muscle around it.
Capabilities and actions required Filled
- Identify and localise the opening from appropriately obtained anatomical evidence.
- Record and compare anal margin observations and symptoms over time.
- Document passage or leakage and link it to separate bowel and continence assessments.
- Support authorised local hygiene and skin protection using an established care plan.
- Prepare a focused handoff for qualified assessment when symptoms or anatomy remain unexplained.
- Check consent, competence and procedural authority before examination, contact or intervention.
Hazards and failure modes required Filled
- Bleeding or a change in habit can signal cancer that needs prompt investigation.
- Sphincter injury, for example during childbirth, can cause lasting incontinence.
Standards and interfaces required Filled
- Terminologia Anatomica, issued by the Federative International Programme for Anatomical Terminology, provides standardized anatomical terminology for the anus and related structures.
- The International Classification of Diseases issued by the World Health Organization classifies diseases and disorders affecting the anus and anal region.
Context of use required Filled
- The anus is the terminal opening of the digestive tract through which feces leave the body.
- It is encountered in anatomy, continence care, personal hygiene and clinical assessment of symptoms affecting the surrounding region.
- Its condition and function are considered alongside the anal canal, sphincters and adjacent skin.
Sources Filled
- Wikidata item Q497: anus - identity and sense of the item
- Wikipedia: Anus - general description of the item
Open questions
- Should this registry entry cover all species with a distinct anus, and how should it link to cloacal anatomy?
- What reproducible anatomical boundary should define the immediate anal margin across intended uses?
- Which established terminology and observation methods should distinguish congenital variation, reconstruction and abnormal openings?
- Which functional observations can be attributed to the anus itself, and which must remain owned by continence or defecation models?
- Which authoritative clinical and veterinary sources should govern assessment thresholds, permitted care actions and context-specific interpretation?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q497/spec.json