dislocation of hip
Enable an agent to recognise and characterise a hip dislocation, record evidence of its current state, and identify when specialist assessment or an established clinical pathway is required.
Bundle → Layer → Finding → Questions Filled
5 bundles · 9 layers · 15 findings · 27 questions
Hip articulation and diagnostic boundaries Establishes which hip relationship is displaced and whether it meets the model's boundary.
Dislocated articulation
Identifies the affected side, socket, and native or reconstructed articulation.
Articulation identity
Record the specific hip articulation and the evidence identifying its constituent structures or components.
- Which hip is affected, and is its articulation native, a total hip prosthesis, a hemiarthroplasty, or another reconstruction? definition
- Which imaging report, operative record, or clinical assessment establishes that articulation type? provenance
Complete displacement boundary
Separates complete dislocation from partial displacement and neighbouring abnormalities.
Loss of congruity
Record evidence of complete displacement and explicitly retain uncertainty where the relationship is not established.
- What evidence distinguishes complete dislocation from subluxation or an apparent displacement caused by imaging projection? boundary
- Does the reported abnormality involve displacement from the socket, prosthetic component dissociation, or a fracture-related displacement requiring linked classification? definition
Displacement pattern and episode Captures the direction, circumstances, and timing of the particular dislocation.
Anatomical displacement pattern
Describes femoral-head or prosthetic-head position using an explicit anatomical reference.
Direction and reference
Record the documented direction and any classification without inferring them solely from limb posture.
- Where is the head relative to the acetabulum or prosthetic socket, and which examination or image establishes that position? measurement
- Which classification system, if any, was used, and does it apply to this native, prosthetic, or fracture-associated presentation? boundary
Onset and recurrence
Separates episode timing from underlying predisposition and prior episodes.
Episode history
Record onset certainty, precipitating circumstances, prior reductions, and whether displacement persisted between observations.
- When was displacement first known or suspected, and what interval remains uncertain? measurement
- Is this a first episode, a recurrence after documented reduction, or continuous longstanding displacement? boundary
- What trauma, movement, developmental history, or previous hip procedure is documented as relevant to this episode? provenance
Associated injury and assessment Represents structural injury and neurovascular findings accompanying displacement.
Fractures, fragments, and components
Links the dislocation to fractures, retained material, or reconstructed-joint problems.
Associated structural abnormalities
Record separately evidenced abnormalities and whether clinicians consider them relevant to congruity or stability.
- Are acetabular or proximal femoral fractures, intra-articular fragments, or prosthetic component abnormalities documented? definition
- Which abnormalities are confirmed, suspected, excluded by the available assessment, or still unassessed? provenance
- Has a clinician identified any abnormality as an obstacle to reduction or a reason for a different treatment pathway? action
Neurovascular status
Preserves timed motor, sensory, and perfusion observations around the dislocation.
Serial neurovascular findings
Record examination components and their limitations rather than compressing incomplete evidence into an unqualified normal result.
- What motor, sensory, and distal perfusion findings were documented on the affected side, and at what times? measurement
- Did any finding change after displacement or intervention, and was that change escalated to the responsible clinician? action
Restoration, stability, and follow-up Tracks clinician-led intervention, verified joint state, and subsequent consequences.
Intervention and verification
Connects treatment events to evidence of the resulting articulation state.
Documented reduction result
Record the intervention and independently documented result, including persistent displacement or residual incongruity.
- What intervention was performed, by whom, and when relative to the known or estimated onset? provenance
- What post-intervention assessment establishes congruity, residual incongruity, persistent dislocation, or an indeterminate result? measurement
- What further assessment or intervention has the treating team specified when restoration is incomplete or uncertain? action
Stability and sequelae
Tracks maintenance of reduction, recurrence, function, and linked complications.
Subsequent hip state
Record later stability and function, and link assessed complications such as osteonecrosis, post-traumatic arthritis, or persistent nerve deficit without presuming they occurred.
- Has the hip remained reduced, and what evidence distinguishes recurrent dislocation from pain or apprehension without confirmed displacement? boundary
- What hip function, symptoms, and possible complications have been assessed at follow-up, and what remains unknown? measurement
- What clinician-prescribed activity restrictions, rehabilitation, or surveillance remain active, and when are they due for review? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of dislocation of hip this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of dislocation of hip this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these identifiers and schemes hold for the sense of dislocation of hip this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of dislocation of hip this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of dislocation of hip this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these regional variation hold for the sense of dislocation of hip this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of dislocation of hip this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Activities and processes
- Entry kind
- thing
- Plane
- ACT
- Domain
- ACT.ACT
- Other names and narrower kinds
- dislocation of hip in animals, developmental dysplasia of the hip
What it is Filled
Dislocation of the hip is complete loss of normal articulation between the femoral head and the acetabulum, or between the corresponding components of a hip prosthesis.
In scope
- Complete loss of hip joint congruity, with side, direction, and evidence recorded
- Native and prosthetic hip dislocations distinguished within the registered concept
- Traumatic, recurrent, longstanding, and developmentally associated presentations
- Associated fractures, neurovascular findings, and obstacles to restoring congruity
- Documented intervention, post-intervention alignment, stability, and follow-up
Out of scope
- Hip subluxation without complete loss of joint congruity
- Developmental dysplasia of the hip as a broader disorder
- Hip or pelvic fractures without accompanying dislocation
- Hip arthroplasty design and implantation as independent subjects
- General trauma resuscitation and unrelated injuries
- Procedural instructions for reduction, anaesthesia, or surgery
Why it exists Filled
Enable an agent to recognise and characterise a hip dislocation, record evidence of its current state, and identify when specialist assessment or an established clinical pathway is required.
Distinguishing features Filled
- Evidence establishes complete loss of articulation rather than partial displacement, which belongs to subluxation.
- The displaced articulation is the hip, rather than the sacroiliac joint, pubic symphysis, or another pelvic relationship.
- Native femoral-head displacement is distinguished from displacement or component dissociation involving a hip prosthesis.
- An associated acetabular or proximal femoral fracture does not replace the dislocation classification; both abnormalities must be represented.
- A previously reduced episode remains a historical dislocation, while current joint congruity is recorded separately.
What robots and AI may and may not do Filled
Must not
- Try to put a hip back or advise others to do so.
- Diagnose a dislocation from a description.
- Move a person with a suspected hip injury after a serious accident unless they are in danger.
- Advise stopping movement precautions set after hip surgery.
Only with a human decision
- Any decision on reduction, surgery or rehabilitation.
May
- Explain hip dislocation in natural and replaced hips, citing medical sources.
- Advise anyone with sudden hip pain and inability to move the leg to seek emergency care.
Moral aspects Filled
- Dislocations can damage nerves and blood supply; delays cause lasting harm.
- Elderly people with hip replacements are especially vulnerable.
Who is affected
- Patients
- Older people with hip replacements
- Accident victims
Owners Filled
Steward
Nobody owns the condition; clinicians answer for each patient's care.
Links to other meta-models Filled
parent
- Q54957692 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.dislocation-of-hip
- Wikidata: Q634638 (https://www.wikidata.org/wiki/Q634638)
Direct properties not applicable Not applicable
- Affected side: left | right | bilateral | uncertain
- Articulation type: native | total hip prosthesis | hemiarthroplasty | other reconstruction | unknown
- Displacement direction: posterior | anterior | other documented direction | indeterminate; specify anatomical reference
- Current congruity: dislocated | reduced and congruent | residual incongruity | uncertain
- Presentation context: acute traumatic | recurrent | longstanding or neglected | developmentally associated | other | uncertain
- Episode timing: date-time with timezone; elapsed hours when onset is known; uncertainty interval otherwise
- Associated structural injury: links to acetabular fracture, proximal femoral fracture, intra-articular fragment, soft-tissue injury, or prosthetic component problem
- Neurovascular assessment: documented motor, sensory, and perfusion findings with side and time; normal | abnormal | not assessed | indeterminate
- Post-reduction stability: clinician-assessed stable | unstable | redislocated | not assessed | indeterminate; include assessment context
Plane ACT: no invented physical properties.
Recognition optional Filled
- The affected leg may appear shortened and held in an abnormal rotation, although appearance varies with the direction of dislocation.
- A posterior dislocation commonly presents with the hip flexed and the leg turned inward, but this posture alone does not establish the diagnosis.
- Diagnostic imaging shows the femoral head displaced from the acetabulum or separation of the corresponding prosthetic articulating components.
Capabilities and actions required Filled
- Identify whether available evidence supports hip dislocation, subluxation, or an unresolved alternative.
- Assemble a side-specific timeline of displacement, examinations, imaging, interventions, and restored congruity.
- Flag a suspected current dislocation or new neurovascular abnormality for urgent clinician assessment.
- Route native, prosthetic, fracture-associated, and developmental presentations to the appropriate clinical pathway.
- Compare documented findings before and after intervention and expose missing reassessments.
- Track recurrence and unresolved consequences without independently authorising a reduction manoeuvre.
Hazards and failure modes required Filled
- Associated nerve or blood vessel injury can impair limb sensation, movement or circulation.
- Disruption of blood supply to the native femoral head can lead to osteonecrosis.
- Associated fractures and cartilage injury can contribute to persistent pain and later joint degeneration.
- Persistent instability or damage to a hip prosthesis can lead to recurrent dislocation and loss of mobility.
Standards and interfaces required Filled
- The International Classification of Diseases, issued by the World Health Organization, provides diagnostic classifications for traumatic hip dislocation and complications involving joint prostheses.
Context of use required Filled
- Hip dislocation is encountered in emergency and orthopedic care following trauma or displacement of the articulating components of a hip replacement.
- Its identification and classification support clinical communication, assessment of associated injuries and selection of an appropriate specialist care pathway.
Sources Filled
- Wikidata item Q634638: dislocation of hip - identity and sense of the item
- Wikipedia: Hip dislocation - general description of the item
Open questions
- Does the registry intend this entry to include developmental and longstanding hip dislocation alongside acute native and prosthetic episodes?
- Is ACT / ACT.ACT an intentional classification for this condition, or does the registry require a classification correction?
- Does an existing Vercy world model already own hip dislocation or a sufficiently encompassing joint-dislocation concept that this entry should reference?
- Which authoritative classifications should govern displacement direction, fracture-dislocation patterns, and prosthetic component dissociation within this model?
- Which evidence-based clinical pathways should supply presentation-specific urgency, verification, and follow-up requirements without imposing one protocol across all hip dislocations?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q634638/spec.json