cystography
Enable an agent to recognize cystography, record whether an examination can answer its bladder-focused clinical question, and identify the review needed before acting on its results.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 16 findings · 26 questions
Cystography identity and variants Establish what counts as cystography and which examination variant a record denotes.
Procedure boundary
Define the bladder-imaging procedure and its neighbouring techniques.
Bladder-directed imaging identity
Record the intended bladder assessment and imaging mechanism rather than inferring cystography from anatomical coverage alone.
- What bladder-focused imaging procedure does the term cystography denote in this record? definition
- What distinguishes this examination from cystoscopy, general pelvic imaging, or urography? boundary
Variant relationships
Represent named variants without assuming every variant has the same phases or capabilities.
Voiding study specificity
A fluoroscopic VCUG evaluates the contrast-filled bladder and urinary tract during filling and emptying; its voiding component must be explicit. [RadiologyInfo: Pediatric VCUG](https://www.radiologyinfo.org/en/info/voidcysto)
- Which named cystography variant was requested and which was actually performed? definition
- Was voiding and urethral visualization intended, completed, or outside this examination's scope? boundary
Clinical question and examination fit Connect the reason for examination to the evidence the selected technique can provide.
Referral target
Identify the suspected abnormality or follow-up question.
Explicit diagnostic target
Record the target as a question to be resolved, with its referral context, rather than treating an indication as an established diagnosis.
- Is the examination intended to assess leakage, healing, reflux, or another specified bladder abnormality? definition
- Which referral, prior examination, operation, or injury record establishes this question? provenance
Technique suitability
Assess whether the technique can resolve the stated question.
Dedicated bladder-trauma technique
For suspected bladder injury, passive filling from excreted intravenous contrast does not replace adequately performed retrograde cystography. [EAU: Urological Trauma](https://uroweb.org/guidelines/urological-trauma/chapter/urogenital-trauma-guidelines)
- Does the documented filling route and acquisition technique meet the applicable requirements for this clinical question? boundary
- What clinician review is needed if the requested technique cannot answer the referral question? action
Bladder filling and image acquisition Describe how the bladder was opacified and which imaging states were captured.
Opacification record
Capture contrast delivery, filling endpoint, and departures from the intended protocol.
Documented filling conditions
The proposed model records agent, dilution, access route, instilled volume, and stopping reason so a reviewer can assess filling conditions.
- What contrast preparation and route were used, and where is their administration documented? provenance
- What volume was instilled, what endpoint was reached, and did discomfort, leakage, or another event stop filling? measurement
Phase coverage
Identify the acquired phases and their suitability for the diagnostic target.
Observable bladder states
Record required versus completed phases and views, including whether motion, incomplete filling, or inability to void limited the intended assessment.
- Which filling, filled-bladder, voiding, and drainage-related phases were required and acquired? measurement
- Which missing phase, view, or anatomical coverage limits the conclusion that can be drawn? boundary
Access and exposure safety Record the checks and events associated with urinary access, contrast, and imaging exposure.
Urinary access readiness
Establish how intravesical access is obtained and whether concerns require review.
Access review
Record existing or proposed access and the responsible clinician's assessment of relevant urethral injury, infection, or recent reconstruction concerns.
- What urinary access is available or proposed, and what documented concerns could affect its use? provenance
- Who must resolve an access concern before catheter placement or bladder filling proceeds? action
Exposure and tolerance
Track applicable exposure checks and the patient's tolerance of the examination.
Procedure-specific safety record
The proposed record includes relevant contrast-reaction history, pregnancy assessment where applicable, radiation quantities, symptoms, and reasons for interruption.
- Which contrast and radiation checks were required by the selected protocol, and where were they recorded? provenance
- Did pain, catheter difficulty, a suspected reaction, or another event require stopping or escalating the examination? action
Interpretation and clinical handoff Represent observed abnormalities, the strength of negative conclusions, and responsibility for acting on the report.
Anatomical observations
Keep leakage, reflux, and other bladder observations distinct and traceable to images.
Leak and reflux localization
Record suspected extravasation separately from reflux into the ureters, with location, side, phase, and interpreter confidence where applicable.
- What images and phases support each reported leak, reflux event, or bladder contour abnormality? provenance
- What location, distribution, laterality, or explicitly named classification did the interpreter assign? measurement
Conclusion and follow-through
Connect interpretation to examination adequacy and an accountable clinical recipient.
Qualified result handoff
Preserve the distinction between an adequate negative assessment and an unresolved question, and record report verification and any required communication.
- Does the examination support a negative conclusion for the referral target, or does a stated limitation leave it unresolved? boundary
- Who verified the report, and what result or limitation requires communication to the responsible clinical team? 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 cystography 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 cystography 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 cystography 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 cystography 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 cystography 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 cystography this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Information and virtual systems
- Entry kind
- thing
- Plane
- INF
- Domain
- INF.KNW
- Other names and narrower kinds
- Cystourethrography, Retrograde urethrogram
What it is Filled
Cystography is diagnostic X-ray imaging of the urinary bladder using an introduced contrast agent to assess its anatomy, integrity, or function, sometimes including imaging during urination.
In scope
- Definition of cystography and relationships among conventional, CT, and voiding examination variants
- Bladder-focused referral questions and selection of an appropriate examination variant
- Contrast administration, bladder filling, acquisition phases, and examination completeness
- Recording bladder leakage, reflux observations, and relevant bladder morphology
- Procedure-specific safety checks, interpretive uncertainty, and result handoff
Out of scope
- Cystoscopy and endoscopic inspection or treatment of the bladder
- Urodynamic pressure testing and comprehensive functional diagnosis
- General CT urography and investigation of the entire urinary tract
- Standalone urethrography protocols
- Treatment models for bladder trauma, vesicoureteral reflux, infection, or malignancy
- Radiology as a profession, academic discipline, or institutional service
Why it exists Filled
Enable an agent to recognize cystography, record whether an examination can answer its bladder-focused clinical question, and identify the review needed before acting on its results.
Distinguishing features Filled
- The examination deliberately evaluates the bladder using X-ray imaging with contrast; merely including the bladder in a pelvic image is insufficient.
- A voiding cystourethrogram includes observation during urination and assessment of the urethra; these are not defining requirements of every cystogram, as described by [RadiologyInfo: Pediatric VCUG](https://www.radiologyinfo.org/en/info/voidcysto).
- For bladder-trauma evaluation, dedicated retrograde cystography must be distinguished from bladder opacification produced by excreted intravenous contrast, as described by [EAU: Urological Trauma](https://uroweb.org/guidelines/urological-trauma/chapter/urogenital-trauma-guidelines).
- Cystoscopy directly inspects the bladder through an endoscope, whereas cystography produces an imaging examination.
- Cystography records imaging observations; it does not itself constitute pressure-flow testing or a treatment intervention.
What robots and AI may and may not do Filled
Must not
- Diagnose reflux, bladder injury or other conditions from images a user shares.
- Advise skipping or delaying a test a clinician has recommended.
- Share imaging records without consent.
- Give radiation dose advice that contradicts the clinical team.
Only with a human decision
- Ordering, performing or interpreting the test.
May
- Explain what a cystography involves in general terms from medical sources.
- Help a patient or parent prepare questions for the clinical team.
Moral aspects Filled
- The test is intimate and can be distressing, especially for children; consent and dignity matter.
- Radiation exposure should be justified and kept as low as possible.
Who is affected
- Patients, especially children
- Parents
- Clinicians
Owners Filled
Steward
The treating clinician orders it; the imaging department performs it.
Master systems
- Patient health records
- Radiology information systems
Links to other meta-models Filled
parent
- Q10659067 - registry parent class
- Q1567532 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.cystography
- Wikidata: Q246052 (https://www.wikidata.org/wiki/Q246052)
Direct properties not applicable Not applicable
- Examination variant: Conventional radiographic cystography; CT cystography; voiding cystourethrography; other explicitly defined variant
- Clinical question: Suspected bladder leak or injury; healing assessment; reflux assessment; other documented bladder question
- Contrast administration route: Retrograde intravesical; intravenous with excretory filling; other specified; unknown
- Administered contrast preparation: Reference to agent, formulation, dilution, and administration record
- Instilled bladder volume: mL, with filling endpoint and reason for stopping
- Acquisition phases completed: Filling; filled bladder; voiding; postvoid; postdrainage; other protocol-defined phases
- Question-specific diagnostic adequacy: Adequate; limited; nondiagnostic; not yet assessed, with reason
- Leak assessment: Detected; not detected; indeterminate; not assessed, with location and distribution when applicable
- Reflux assessment: Detected; not detected; indeterminate; not assessed, with side, phase, and named grading system if used
- Radiation exposure record: Modality-appropriate reported quantities and units, such as dose-area product in Gy·cm² or CT dose-length product in mGy·cm
Plane INF: no invented physical properties.
Recognition not applicable Not applicable
Not applicable
Cystography is an imaging procedure whose identity is established from examination records rather than an intrinsic visual appearance.
Capabilities and actions required Filled
- Classify a requested or completed examination by cystography variant and flag ambiguous terminology.
- Compare the referral question with the selected variant and recorded acquisition phases.
- Check for missing filling, contrast, safety, or image-quality information before interpretation.
- Represent leak and reflux observations with anatomical location, examination phase, and uncertainty.
- Prepare a traceable summary for radiologist or referring-clinician review.
- Identify whether an unresolved clinical question requires clinician consideration of further evaluation.
Hazards and failure modes required Filled
- Urinary infection can follow catheterisation.
- Radiation exposure, though low, adds up over repeated tests.
Standards and interfaces required Filled
- Council Directive 2013/59/Euratom laying down basic safety standards for protection against ionising radiation, European Union.
Context of use required Filled
- Cystography is used in radiology and urology to investigate suspected bladder leakage, structural abnormalities or reflux toward the upper urinary tract.
- Imaging during urination can provide additional information about bladder emptying and the urethra when relevant to the clinical question.
Sources Filled
- Wikidata item Q246052: cystography - identity and sense of the item
- Wikipedia: Cystography - general description of the item
Open questions
- Does an existing Vercy world model already own cystography or a sufficiently encompassing procedure concept, requiring this registry entry to link to it?
- Which authoritative terminology should determine whether radionuclide cystography and contrast-enhanced voiding urosonography are variants within this entry or related procedures?
- Which population- and indication-specific protocols should supply filling endpoints, required phases, and adequacy criteria?
- Which current guidelines and local policies govern infection assessment, antimicrobial prophylaxis, sedation, and access after suspected urethral injury?
- Which reporting classifications and coding systems should be adopted for reflux, bladder leakage, and examination variants, and which versions apply?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q246052/spec.json