Revision sheet

Urodynamics

9 steps, each one the authored title and caption from the interactive animation, with the frame captured from that step. Read it before the case, or print it and work through the steps in order.

Teaching only, not for diagnosis or treatment decisions. The text on this sheet is the animation's own step copy, reproduced verbatim.

Open the animation All revision sheets Download the PDF

UrOops3D · UroRef · © Nity G

  1. 01

    The question

    Urodynamics. Step 1: The question. Captured frame from the interactive animation.
    • Written before the catheter goes in: what would this study change?
    • Surgery for stress leakage, botulinum toxin, an outlet operation, the diagnosis in a neuropathic bladder.
    • A study without a question is a trace nobody can act on.
  2. 02

    Set up

    Urodynamics. Step 2: Set up. Captured frame from the interactive animation.
    • A 6 French double-lumen urethral catheter that fills and measures, a rectal balloon line for abdominal pressure, detrusor pressure as the subtraction.
    • Transducers zeroed to atmosphere at the symphysis; a cough shows equal rises and a flat detrusor.
  3. 03

    Filling

    Urodynamics. Step 3: Filling. Captured frame from the interactive animation.
    • At 30 to 50 ml a minute with room-temperature saline or contrast, sitting or standing as the patient leaks in life; slower for the neuropathic bladder.
  4. 04

    Sensation and compliance

    Urodynamics. Step 4: Sensation and compliance. Captured frame from the interactive animation.
    • First sensation, first desire, strong desire and capacity written on the trace.
    • Compliance is volume over the rise in detrusor pressure; a pressure that climbs with filling is a stiff bladder and a kidney at risk.
  5. 05

    Provocation and overactivity

    Urodynamics. Step 5: Provocation and overactivity. Captured frame from the interactive animation.
    • Coughing, running water, position.
    • Detrusor overactivity is a phasic rise in detrusor pressure during filling that the patient cannot suppress, with or without urgency or a leak.
  6. 06

    The leak

    Urodynamics. Step 6: The leak. Captured frame from the interactive animation.
    • Coughs at set volumes with the meatus watched: a leak with a cough and no detrusor rise is urodynamic stress incontinence.
    • The abdominal leak point pressure, the lowest pressure that leaks, separates a weak sphincter from a mobile urethra.
  7. 07

    Voiding

    Urodynamics. Step 7: Voiding. Captured frame from the interactive animation.
    • Permission to void with the catheter in: the pressure-flow study.
    • Qmax, detrusor pressure at Qmax, the obstruction index over 40 obstructed and under 20 not, and the residual after.
  8. 08

    Video

    Urodynamics. Step 8: Video. Captured frame from the interactive animation.
    • Contrast on screening: reflux during filling, the shape of the neck, descent with straining, and the level of an obstruction.
  9. 09

    The report

    Urodynamics. Step 9: The report. Captured frame from the interactive animation.
    • It answers the question in ICS terms: sensation, compliance, overactivity, leak and its mechanism, obstruction, contractility, residual.
    • The trace is kept with it; the diagnosis is on the trace.

Derived from endoscopy/UrodynamicsScene.tsx at build time: every step title and caption above is the authored ProcedureDef text, reproduced verbatim, and this page shares its readable-points renderer with the animation itself. 9 of 9 steps have a captured frame.

Text fingerprint 3159b75f5ad5e05a. A caption edit without a re-capture fails the production check, so the sheet and the animation cannot drift apart silently.